ADC/DAC
Produkte (2518)
AD7828LPZ-REEL - 8-Bit 8-Ch 50kSPS Half-Flash ADC | Analog Devices
The Analog Devices AD7828LPZ-REEL is an 8-bit, 8-channel, half-flash analog-to-digital converter (ADC) housed in a 28-pin PLCC (J-Lead) package, sampling up to 50 kSPS per channel with a 2.5 µs conversion time. According to the Analog Devices AD7828 datasheet, the part operates from a single +5 V supply, accepts an analog input range of 0 V to +5 V when using an external +5 V reference, and integrates an on-chip track-and-hold capable of digitizing full-scale signals up to 10 kHz (157 mV/µs slew rate) on every channel. The half-flash (two-step) architecture halves the silicon area and power compared with a full-flash converter while still delivering per-channel conversion rates suitable for multiplexed data-acquisition front ends. A half-flash ADC is a multi-step flash converter that performs a coarse conversion, generates a DAC residue, then performs a second flash conversion on the residue; the two results are combined digitally to produce the final code. Within the broader hierarchy, half-flash ADCs sit between successive-approximation (SAR) converters and full-flash converters - faster than typical SAR ADCs of equivalent resolution but slower than full-flash, at lower cost and lower power. ADCs of this class are widely used as the analog front end of microcomputer-based instrumentation where multiple sensors must be scanned and digitized with deterministic latency. Key features of the AD7828LPZ-REEL include 8 multiplexed analog input channels, a built-in track-and-hold, a parallel microprocessor interface using standard CS and RD signals, a single +5 V supply, and typical power dissipation of 40 mW to 50 mW. The device is fabricated in an advanced, all ion-implanted Linear-Compatible CMOS (LC²MOS) process that combines bipolar analog precision with CMOS digital logic on a single die. Typical applications include multi-channel data-acquisition systems, process-control front ends, industrial instrumentation, point-of-sale terminals, and any embedded system requiring simultaneous sampling of multiple analog sensors through a single ADC. The parallel interface makes the part especially easy to drop into 8051-, 68HC11-, and 80C196-style microcontroller buses without glue logic. When designing with the AD7828, note that the analog input range is 0 V to VREF (with VREF tied to VDD for a 0-5 V range), so input signals that swing below ground or above the reference require a level-shift network. Decouple VDD with a 0.1 µF ceramic in parallel with a 10 µF tantalum placed within 1 cm of the supply pin to suppress the digital switching transients that can couple into the analog input. The REEL suffix denotes Tape & Reel packaging for high-volume SMT assembly. This page synthesizes distributor pricing, drop-in cross-references from the AD7828 family, and practical design notes that go beyond the manufacturer datasheet to help you decide whether the AD7828LPZ-REEL is the right 8-bit multi-channel ADC for your design.
AD7829BRU-REEL - 8-Bit 2MSPS 8-Ch ADC, 28-TSSOP | Analog Devices
The Analog Devices AD7829BRU-REEL is a high-speed, 8-bit, 8-channel analog-to-digital converter with a maximum throughput of 2 MSPS, housed in a 28-pin TSSOP package supplied on a 13-inch reel. The part combines an on-chip 2.5 V reference (2% tolerance), a track-and-hold amplifier, a 420 ns half-flash ADC core, and a high-speed parallel microprocessor-compatible interface on a single die, making it a complete data-acquisition front-end for cost-sensitive embedded designs. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that quantizes a continuous analog voltage into a discrete digital code. The AD7829 belongs to the successive-approximation / half-flash half-flash ADC family, which splits an 8-bit conversion into two 4-bit flash passes, balancing speed and silicon area. Within the broader product hierarchy, the AD7829 sits in the data-converter -> ADC -> successive-approximation / half-flash branch of the signal-chain IC taxonomy. Key features include 8 single-ended analog input channels with channel-selection logic, automatic power-down at the end of conversion (CONVST pin combines convert-start and power-down for low standby current), operation from a single 3 V +/-10% or 5 V +/-10% supply, and an on-chip reference that eliminates external reference cost. The half-flash architecture delivers 420 ns conversion time per channel, supporting aggregate throughput up to 2 MSPS when channels are scanned sequentially. The device accepts a wide analog input range (0 V to VREF for unipolar single-ended inputs) and presents results on a parallel 8-bit data bus with standard CS and RD strobes. The TSSOP-28 footprint occupies approximately 9.7 mm x 4.4 mm, allowing dense PCB layouts. The -REEL suffix indicates the device ships in Tape & Reel packaging for high-volume SMT assembly. Typical applications include portable instrumentation, data-acquisition front-ends for industrial PLCs, multi-channel sensor arrays, scan-based measurement systems, and embedded processor monitors. The automatic power-down feature makes the AD7829 particularly attractive for battery-powered designs where quiescent current matters between conversions. When designing with this part, observe the analog and digital grounding scheme shown in the datasheet: tie AGND and DGND together at one low-impedance point near the ADC, and decouple VDD and VDRV separately. The on-chip reference requires a 0.1 uF ceramic bypass close to the REFIN/REFOUT pin to keep conversion noise low.
AD7851KN - 14-Bit 333 kSPS Serial ADC | Analog Devices
The Analog Devices AD7851KN is a 14-bit, 333 kSPS successive-approximation serial sampling analog-to-digital converter that operates from a single 5 V supply and is packaged in a 24-pin PDIP (N-24) through-hole plastic DIP. The K-grade device is specified for 285 kSPS throughput with 1 LSB maximum DNL and is guaranteed to operate up to 125 C, making it suitable for industrial temperature environments. A successive-approximation register (SAR) ADC is a sampling converter that performs a binary search on the input voltage using an internal DAC and comparator; SAR ADCs are valued for deterministic latency, low-latency single-shot conversion, and inherent ease of single-supply operation. Within the converter/ADC product family, the AD7851KN sits at the integration level that sits below integrated microcontrollers with ADC peripherals but above discrete op-amp+counter sample-and-hold designs, occupying the middle of the data-acquisition signal chain where predictable timing and serial interfacing outweigh the need for very-high channel counts. Key features include a pseudo-differential analog input with two programmable input ranges (0 V to VREF and 0 V to 2 x VREF, with unipolar coding only), built-in self-calibration and system-calibration modes for accuracy over time and temperature, multiple power-down options for low-power applications, and a serial interface compatible with most microcontrollers and DSPs via the active-low CONVST and serial-data framing. The K-grade models are guaranteed to retain 1 LSB DNL at the 285 kSPS rate across the full -40 C to +125 C automotive-industrial range. The device architecture uses a capacitive charge-redistribution DAC in the SAR loop, with auto-calibration of offset and gain on demand; this corrects drift introduced by the internal reference buffer and the comparator over temperature. Conversion is initiated by the falling edge of CONVST, and data is clocked out on a single DOUT line with synchronous SCLK, reducing isolated-system wiring to three lines. The pseudo-differential input rejects common-mode noise on the DC input and is well suited for ratiometric measurements using an external reference and a transducer bridge. Typical applications include industrial process-control analog input modules, multi-channel data-acquisition front ends, motor-control current and voltage sensing loops, instrumentation transducer signal conditioning, and legacy upgrade paths in systems designed around the original AD7851. The serial interface and small footprint also support portable data loggers and battery-powered test equipment where board area and power budget are constrained. When designing with this part, provide a low-impedance reference of 2.5 V or 5 V at the REF pin through a 10 uF decoupling capacitor, and maintain a quiet analog ground to avoid coupling digital SCLK edges into the conversion result. The self-calibration routine should be issued at power-on and after any large temperature change to retain the 1 LSB DNL guarantee; without calibration, gain error can drift by several LSBs across the -40 C to +125 C range. This page synthesizes the ADI datasheet specifications, current distributor stock from Octopart and Infinity-Semiconductor, and a Same-Brand Same-Family drop-in alternative set useful for designers migrating from end-of-life AD7851 builds to other 14-bit SAR ADCs.
AD7853LBRZ-REEL - 12-Bit 100kSPS SAR ADC | Analog Devices
The Analog Devices AD7853LBRZ-REEL is a 12-bit, 100 kSPS successive-approximation analog-to-digital converter (SAR ADC) operating from a single 3 V to 5.5 V supply, housed in a 24-pin SOIC (Wide, 0.295 inch / 7.50 mm) package supplied on tape and reel. The -L suffix indicates the lower-power, 100 kSPS speed grade (vs. the standard AD7853 which runs at 200 kSPS), and the BRZ suffix denotes lead-free SOIC wide-body packaging. An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm implemented with a capacitive DAC and a comparator to digitize an analog input in N successive approximation steps. SAR converters are valued for their deterministic latency, single-shot accuracy, and low power consumption compared to pipeline or sigma-delta ADCs. As a precision data-acquisition building block, an SAR ADC sits between the analog signal-conditioning front end (amplifiers, filters, muxes) and the digital host controller in the broader mixed-signal IC hierarchy: sensor -> analog front-end -> ADC -> MCU/DSP/FPGA. Key features include 12-bit resolution with no missing codes, an 8051/QSPI/MICROWIRE-compatible serial interface, self-calibration on power-up, and a typical power dissipation of only 12 mW at 5 V. The wide SOIC-24 footprint provides generous thermal headroom and easy hand-soldering or rework in prototyping. The single-supply, low-power architecture makes the part especially well suited to portable instrumentation, industrial process control, and battery-powered data-acquisition front ends. Typical applications include portable instrumentation and battery-powered data loggers, industrial process-control loops (4-20 mA digitized at the sensor), patient-monitoring front ends, multi-channel multiplexed data-acquisition systems, and precision sensor read-out (load cells, strain gauges, thermocouple digitizers). Designers value the -L grade when the application requires sub-100 kSPS throughput and minimal quiescent drain. When designing with this device, route the analog and digital grounds as a star from a common point, decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin, and keep the SCLK and CONVST traces short to avoid aperture jitter. The self-calibration routine takes a fixed time after power-up - reserve 100 us in your firmware before issuing the first conversion command. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7856ARZ-REEL7 - 14-Bit 285kSPS 8-CH SAR ADC | Analog Devices
The Analog Devices AD7856ARZ-REEL7 is a 14-bit, 285 kSPS, 8-channel successive approximation register (SAR) analog-to-digital converter (ADC) operating from a single 5 V supply in a 24-pin SOIC package. The -REEL7 suffix denotes a 7-inch tape-and-reel packaging variant of the AD7856ARZ. The device combines high-speed conversion (285 kSPS throughput) with low power consumption, drawing approximately 60 mW during continuous conversion and dropping to a few milliwatts in its programmable power-down modes. What is an SAR ADC? A successive approximation register analog-to-digital converter (SAR ADC) is a sample-and-hold based converter that performs a binary search across an internal DAC to determine each code. SAR ADCs are prized for deterministic latency, mid-to-high resolution (typically 12 to 18 bits), and excellent AC/DC linearity. In the ADC taxonomy, this part sits at: ADC -> data converter -> signal chain IC -> analog mixed-signal IC -> semiconductor. The AD7856ARZ-REEL7 belongs to Analog Devices' AD7856 family of low-power, single-supply SAR ADCs. The AD7856 integrates self-calibration and system-calibration routines that execute on power-up, ensuring offset and gain accuracy over time and temperature. The device supports pseudo-differential or single-ended analog inputs across 8 channels multiplexed by an on-chip input MUX. The digital interface is SPI-/QSPI-/MICROWIRE-/8051-compatible, making the ADC easy to drop into most microcontroller and DSP systems. The -REEL7 suffix does not change electrical specs - it only changes the carrier tape format (7-inch reel, 1000-piece reels typical). Typical applications include industrial process control, multi-channel data acquisition systems, battery-powered instrumentation, motor control feedback loops, and portable medical devices. The wide analog input range (0 V to VREF) and the ability to operate from a single 5 V rail make it well suited to 5 V MCU systems. Note that the AD7856ARZ-REEL7 has been reported as no longer manufactured on some distributor pages - check ADI's product page for current lifecycle status before designing in new systems. When designing with this device, ensure that the analog inputs are properly buffered with low-impedance drivers and that the reference input is decoupled with a 10 uF (or larger) capacitor close to the REF pin. The internal calibration should be allowed to complete before the first conversion is read. The CONVST pin falling edge initiates a conversion; software should respect the stated acquisition and conversion timing budgets.
AD7858LARS-REEL - 12-bit 100kSPS 8-Ch SAR ADC | Analog Devices
The Analog Devices AD7858LARS-REEL is a 12-bit, 100 kSPS successive-approximation analog-to-digital converter with 8 single-ended (or 4 pseudo-differential) input channels, packaged in a 24-pin SSOP and supplied on a 3.3 mm tape-and-reel carrier. The 'L' suffix denotes the low-power grade, optimized for 4.5 mW operation at VDD = 3 V, with the family sibling AD7858 (non-L) offering the 200 kSPS speed grade at 12 mW. A successive-approximation register (SAR) ADC is a sampling data-converter architecture that uses a binary-search algorithm against an internal DAC to produce N-bit digital codes in N conversion cycles. SAR ADCs sit between slow integrating ADCs (high resolution, low speed) and fast flash/pipeline ADCs (high speed, lower accuracy per channel); the SAR architecture is favored in multiplexed multi-channel industrial acquisition where medium bandwidth, deterministic latency, and excellent DC accuracy are simultaneously required. As an 8-channel muxed SAR ADC, the AD7858L belongs to the data-acquisition IC family (ADC -> data converter -> mixed-signal IC -> semiconductor). Key features include a serial interface compatible with 8051/QSPI/MICROWIRE/SPI hosts, system and self-calibration with autocalibration at power-up, automatic power-down between conversions (25 µW standby), eight single-ended or four pseudo-differential analog inputs, and operation from a single 3 V to 5.5 V supply. The wide supply range supports both 3.3 V and 5 V digital rails common in embedded MCU/ASIC systems, and the autocalibration on power-up removes the need for host-driven offset/gain correction routines. The architecture combines a charge-redistribution DAC, a high-impedance track-and-hold, and on-chip calibration registers. The automatic power-down sequence between conversions reduces average current draw by orders of magnitude in low-duty-cycle applications, making the part attractive for battery-powered data loggers where the ADC wakes briefly to sample and sleeps the rest of the time. Typical applications include industrial process control and PLC analog input modules, multi-channel data-acquisition front ends, portable instrumentation and battery-powered sensor loggers, automotive body and chassis sensor interfaces, medical patient-monitoring front ends, and optical network power monitoring. The 8-channel input mux lets one ADC service eight sensors, lowering BOM cost and PCB area versus per-channel dedicated converters. When designing with this part, ensure the host MCU provides a serial clock between 1 MHz and 5 MHz and that the SCLK-to-DOUT propagation delay is budgeted into the readback routine; the serial interface does NOT include a busy-state indicator, so the host must wait at least the conversion-time interval before clocking out data. Decouple VDD with a 10 µF tantalum in parallel with a 0.1 µF ceramic placed within 5 mm of the pin. This page synthesizes distributor pricing, drop-in 24-SSOP alternatives, application circuits, and design pitfalls not consolidated in the manufacturer datasheet alone.
AD7858LBR-REEL - 12-bit 100kSPS 8-Ch ADC SOIC-24 | Analog Devices
The Analog Devices AD7858LBR-REEL is a low-power, 12-bit, 8-channel successive-approximation-register (SAR) analog-to-digital converter (ADC) housed in a 24-pin SOIC wide-body package and shipped on a 13-inch tape-and-reel carrier. It operates from a single 3 V or 5 V supply, samples at up to 100 kSPS (the 'L' speed grade; the standard AD7858 reaches 200 kSPS), and integrates either 8 single-ended or 4 pseudo-differential input channels multiplexed to its on-chip track/hold and SAR core. The -REEL suffix indicates the SOIC-24 wide-body package and 2500-piece reel packaging. A SAR ADC is a successive-approximation-register analog-to-digital converter: a binary-search loop that compares the sampled input against a precision DAC in N clock cycles (N = resolution in bits) to produce a fully settled conversion in a single acquisition window. ADCs sit hierarchically inside the data-converter family (ADC/DAC), which in turn are a sub-category of mixed-signal and interface ICs in the broader integrated-circuits ecosystem. Key features of the AD7858L include 12 mW typical power consumption from a 3 V supply, automatic power-down to 25 µW between conversions, on-chip system and self-calibration that runs automatically on power-up, and a flexible serial interface compatible with most DSPs and microcontrollers. Operating temperature range is -40 °C to +85 °C (industrial grade), and the part is specified for VDD of 2.7 V to 5.5 V. The converter architecture is a charge-redistribution SAR with input span 0 V to VREF (with VREF typically tied to VDD). Eight single-ended channels are routed through an analog multiplexer; the user can configure the part for four pseudo-differential pairs by software. The wide SOIC-24 footprint simplifies hand prototyping and inspection compared to the SSOP variant. Typical applications include multi-channel data-acquisition front ends, industrial process-control loops, portable battery-powered instrumentation, and automotive sensor monitoring. The integrated multiplexer makes it a single-chip replacement for systems that previously needed an external analog switch. When designing with this part, place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin and keep analog/digital ground returns separated to a single star point under the IC. Because this part is now obsolete, confirm last-time-buy stock and consider AD7858LBRZ-REEL or a modern alternative such as AD7606 for new designs.
AD7862AR-10 - Dual 250kSPS 12-Bit ±10V ADC | Analog Devices
The Analog Devices AD7862AR-10 is a high-speed, low-power, dual 12-bit successive-approximation analog-to-digital converter (ADC) with simultaneous sampling capability, specified for the standard industrial ±10 V input range, and housed in a 28-pin SOIC (R-28) wide-body package. The device operates from a single +5 V supply, integrates two independent 4 microsecond SAR ADCs, two track-and-hold amplifiers, an internal +2.5 V reference, and a high-speed parallel microprocessor interface. A simultaneous-sampling ADC is a converter whose two (or more) sample-and-hold stages acquire their input voltages at the same instant, eliminating the channel-to-channel time skew that would otherwise appear in multi-axis motor control, power-line monitoring, or three-phase measurement systems. By definition, an SAR (Successive Approximation Register) ADC walks an internal DAC bit-by-bit from MSB to LSB each conversion, delivering deterministic latency and excellent DC linearity - the architecture sits inside the broader family of data-converter ICs alongside flash, pipeline, sigma-delta, and dual-slope converters. The AD7862 belongs to that SAR sub-family at the low-to-mid speed tier (250 kSPS) optimized for multiplexed industrial signal chains rather than imaging or communications. Key specifications include 250 kSPS per-channel throughput, 4 microsecond conversion time, 4 analog inputs arranged as two channel pairs (VA1/VA2 and VB1/VB2) selected by the A0 logic input, ±10 V true-bipolar input range for the -10 variant, ±5 LSB maximum integral nonlinearity (INL), and 60 mW typical power dissipation. The internal +2.5 V reference eliminates external reference circuitry, while a hardware A0 line selects which channel pair is actively converting, allowing one device to monitor four sensors with two ADC cores. Architecturally, the AD7862 pairs two SAR cores with matched aperture-delay track-and-hold amplifiers, so the chip captures both signals simultaneously and then digitizes them sequentially through the shared digital interface. The internal reference, voltage-regulator front end, and parallel data bus combine to deliver AC performance such as 70 dB typical SNR and 80 dB typical CMRR at 50 kHz while keeping the BOM simple. Typical applications include AC motor control feedback, three-phase power-line monitoring, multi-axis servo systems, instrumentation, and data acquisition boards where two signals must be sampled within the same clock cycle. The wide ±10 V input is also attractive for PLC analog-input modules and process-control front ends that must accept industrial-level signals directly. When designing with this device, ensure that the analog inputs are protected against overvoltage beyond the ±10 V common-mode rail and that the +5 V analog supply is well decoupled with a 10 microfarad tantalum and a 0.1 microfarF ceramic capacitor placed close to the AVCC pin. The A0 channel-select line should be driven synchronously with the CONVST signal to avoid ghost conversion artifacts. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7862ARS-2REEL - Dual 250kSPS 12-Bit Simultaneous Sampling ADC | Analog Devices
The Analog Devices AD7862ARS-2REEL is a high-speed, low-power, dual 12-bit successive-approximation analog-to-digital converter (SAR ADC) with simultaneous sampling on two channels, packaged in a 28-pin SSOP (Shrink Small Outline Package) and supplied on a 2,500-piece reel. The device includes two track-and-hold amplifiers, an internal +2.5 V reference, and a high-speed parallel interface, making it a complete data-acquisition front end for one A/D conversion slot. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a sampling data converter that uses a binary-search algorithm and an internal DAC to resolve an analog input to N bits in N clock cycles. SAR ADCs are valued for deterministic latency, excellent DC accuracy, and zero-latency single-shot conversion, which makes them the dominant architecture for multiplexed or simultaneously-sampled multi-channel industrial measurement, motor control, and instrumentation systems where each channel must be captured at a precise instant. Key features of the AD7862 include 250 kSPS per-channel throughput, simultaneous sampling across two ADC cores sharing one reference, single +5 V supply operation, a choice of input ranges (0 V to +2.5 V for the -2 input range variant, or ±10 V / 0 V to +5 V on -1 / -3 variants), and a high-speed parallel interface for direct connection to microprocessors, DSPs, or FPGAs. The -2 input-range selection is the bipolar ±10 V part with hardware input-range protection on the analog pins. The architecture uses two independent SAR cores clocked in parallel from a common conversion start signal, guaranteeing that VA1 and VA2 (or VB1 and VB2) are sampled on the same clock edge. An internal 2.5 V reference with low temperature drift supplies both ADCs, eliminating the need for an external reference and the associated noise and cost. Power dissipation is typically 60 mW at full throughput and drops to 5 µW in standby mode, enabling portable and battery-backed designs. Typical applications include multi-axis motor control (simultaneous current sensing on multiple phases), three-phase power-line monitoring, instrumentation and process control front ends, multi-channel data-acquisition cards, vibration and acoustic analysis front ends, and industrial control loops where channel-to-channel skew must be eliminated. When designing with this part, always place 100 nF decoupling capacitors as close as possible to the AVCC and DVCC pins and keep the analog ground plane separate from the digital ground plane, joined only at the AGND/DGND pins of the IC. Use a single 5 V supply that is well-regulated; ripple on AVCC directly appears as conversion noise. Because the device uses simultaneous sampling, ensure your DSP or FPGA reads both data words within the same control cycle to preserve the phase relationship. This page synthesizes Analog Devices datasheet specifications, distributor pricing, drop-in alternatives, and design notes that are not consolidated on the manufacturer datasheet alone - giving engineers a single point of reference for selecting and qualifying the AD7862ARS-2REEL in new designs and legacy replacements.
AD7862ARS-3REEL - Dual 12-Bit 250kSPS ADC, ±2.5V | Analog Devices
The Analog Devices AD7862ARS-3REEL is a high-speed, low-power, dual 12-bit successive-approximation analog-to-digital converter (ADC) housed in a 28-pin SSOP package. It operates from a single +5 V supply, contains two 4 µs SAR ADCs, two track-and-hold amplifiers, an internal +2.5 V reference, and a high-speed parallel interface. The -3 input-range option accepts ±2.5 V bipolar analog inputs, distinguishing it from the -10 (±10 V) and -2 (0 V to 2.5 V) variants. A successive-approximation ADC (SAR ADC) is a type of data converter that performs a binary search across an internal DAC to resolve an input voltage to N bits within a fixed number of conversion cycles. Dual-SAR ADCs place two complete SAR cores on one die, enabling truly simultaneous sampling of two signals - critical for power-converter control, motor drives, and multi-phase measurement where phase skew between channels would corrupt the result. Key features of the AD7862ARS-3REEL include 250 kSPS per-channel throughput, simultaneous sampling across two channels (four inputs total), ±2.5 V bipolar input range (variant -3), 4 µs conversion time per channel, on-chip 2.5 V reference, overvoltage protection on analog inputs, low 60 mW typical power dissipation, and a 50 µW power-saving mode. The high-speed parallel interface simplifies connection to microcontrollers, DSPs, and FPGAs without external glue logic. Typical applications include motor-control current sensing, three-phase power-line monitoring, multi-axis inertial measurement, data-acquisition front ends, and instrumentation. The simultaneous-sampling dual-core topology removes inter-channel skew, while the ±2.5 V range handles industrial signal levels without external attenuators. When designing with this part, place 0.1 µF decoupling capacitors close to each supply pin and keep analog/digital grounds separated until they join at the ADC GND pin. The internal 2.5 V reference can be bypassed with a 10 µF tantalum capacitor for low-noise operation; an external reference may be used for higher accuracy. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not typically aggregated on the Analog Devices product page.
AD7863AR-10REEL - Dual 175 kSPS 14-Bit Simultaneous-Sampling ADC | Analog Devices
The Analog Devices AD7863AR-10REEL is a simultaneous-sampling dual 14-bit analog-to-digital converter (ADC) with a maximum throughput of 175 kSPS per channel, packaged in a 28-pin SOIC wide-body (0.295 inch / 7.50 mm) for surface-mount assembly and shipped on a 13-inch tape-and-reel. It integrates two successive-approximation (SAR) ADCs, two track-and-hold amplifiers, an internal 2.5 V reference, and a high-speed parallel interface on a single die built in Analog Devices' linear-compatible CMOS (LC²MOS) mixed-signal process. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that converts real-world analog signals into discrete digital codes for processing by microcontrollers, DSPs, FPGAs, or ASICs. The SAR (successive-approximation register) architecture used in the AD7863AR-10 trades flash-level speed for extremely low power consumption and 14-bit resolution with no pipeline latency, making it ideal for multiplexed or simultaneous-sampling data-acquisition front ends. Within the broader IC taxonomy, this part is a precision ADC > data converter > signal-conditioning IC > analog mixed-signal IC. Key specifications include 14-bit resolution, 175 kSPS throughput, a 5.2 µs conversion time per channel, ±10 V or ±2.5 V bipolar input ranges (or 0 V to 2.5 V pseudo-bipolar with the -10 variant; the -10 suffix here denotes the input range option), and single 5 V supply operation. The on-chip 2.5 V reference with two 0.1 µF bypass capacitors simplifies BOM and reduces board area. Dynamic AC performance is specified and tested for phased-array sonar, adaptive filtering, and spectrum-analysis applications. Architecture details: each ADC channel uses a capacitive-DAC SAR core preceded by a track-and-hold amplifier that holds both channels simultaneously when the CONVST (conversion-start) signal is asserted, eliminating channel-to-channel skew. The high-speed parallel interface provides 14-bit data, BUSY, and end-of-conversion signaling, simplifying connection to DSPs and microcontrollers with parallel bus support such as the ADSP-21xx family. Typical applications include three-phase motor control and power-line monitoring, multi-axis motion control, simultaneous-sampling instrumentation, vibration analysis, and phased-array sonar. The bipolar ±10 V input range allows direct sampling of industrial-level signals without external signal conditioning. For these uses, the key design advantage is deterministic dual-channel sampling latency — both ADCs sample the same instant, so vector math (Clarke/Park transforms) can be applied without correction. When designing with the AD7863AR-10REEL, ensure adequate decoupling on AVDD and DVDD, and place the two 0.1 µF reference-bypass capacitors immediately adjacent to the VREF and AGND pins. The wide 28-SOIC footprint provides ample thermal headroom but routes BUSY, CONVST, and the parallel data bus carefully to avoid coupling into the analog inputs. This page synthesizes distributor pricing, authoritative drop-in alternatives from the AD7863 family and competing 14-bit simultaneous-sampling ADCs, and practical layout/thermal notes that complement (and in some places extend) the information in the manufacturer datasheet alone.
AD7863AR-3REEL - Dual 14-Bit 175 kSPS ADC | Analog Devices
The Analog Devices AD7863AR-3REEL is a simultaneous-sampling dual 14-bit analog-to-digital converter (ADC) that operates from a single 5 V supply and delivers up to 175 kSPS per channel in a 28-pin SOIC wide-body (0.295 inch / 7.50 mm) package supplied on tape-and-reel. The part integrates two successive-approximation ADCs, two track-and-hold amplifiers, an internal 2.5 V reference, and a high-speed parallel interface, providing true simultaneous sampling of two input channels with a 5.2 us conversion time per channel. The -3 input range variant accepts +/-10 V or +/-2.5 V bipolar inputs through on-chip scaling, eliminating external signal-conditioning resistors. An ADC (analog-to-digital converter) is a semiconductor device that transforms continuous analog voltages into discrete digital codes, and a successive-approximation (SAR) ADC achieves this conversion through a binary-search algorithm using an internal DAC and comparator. Dual simultaneous-sampling SAR ADCs sit within the broader data-acquisition IC hierarchy: ADC -> SAR ADC -> simultaneous-sampling ADC -> data-acquisition IC -> signal-chain IC -> semiconductor. They are essential whenever the relative phase between two analog channels must be preserved (motor control, three-phase power, vibration analysis). Key features include 14-bit resolution with +/-1 LSB typical integral nonlinearity, four analog input channels (two channels x two input ranges), 5.2 us conversion time per channel yielding 175 kSPS throughput, +/-10 V or +/-2.5 V software-selectable input ranges, internal 2.5 V reference (low-drift option available on -10 grade), single 5 V supply operation, low power consumption (~50 mW typical), and high-speed parallel output bus. The wide-body SOIC-28 package provides good thermal performance and easy hand-solderability for prototypes. The AD7863 is fabricated in Analog Devices' linear-compatible CMOS (LC2MOS) mixed-technology process, combining precision bipolar input stages with low-power CMOS logic. This architecture enables the +/-10 V true-bipolar input range without external resistor dividers while maintaining low noise and excellent DC accuracy across the -40C to +85C operating window. Typical applications include three-phase motor control current sensing, AC line voltage monitoring in power inverters, industrial data-acquisition front ends, vibration and modal analysis, multi-axis position sensing, and instrumentation requiring simultaneous capture of two analog signals with known phase relationships. Designers should ensure the single 5 V analog supply is well decoupled with both 10 uF bulk and 0.1 uF ceramic capacitors close to the supply pin, and follow the parallel-bus timing diagram carefully when interfacing to DSPs or microcontrollers.
AD7863ARSZ-10REEL - 14-Bit 175kSPS Dual Simultaneous-Sampling ADC | ADI
The Analog Devices AD7863ARSZ-10REEL is a high-speed, low-power, dual 14-bit simultaneous-sampling analog-to-digital converter (ADC) supplied on a 5 V rail and housed in a 28-pin SSOP package. The part integrates two 5.2 microsecond successive-approximation ADCs, two matched track/hold amplifiers, an internal 2.5 V reference, and a high-speed parallel interface that delivers 175 kSPS per channel with simultaneous sampling across both inputs. With four analog inputs multiplexed through two channels (selected by the A0 logic input), a single CONVST edge places both track/holds into hold and initiates conversion on both ADCs at exactly the same instant, preserving phase information for multi-axis or polyphase systems. A successive-approximation register (SAR) ADC is a binary-search converter that compares the sampled input against an internal DAC, resolving one bit per clock cycle. SAR ADCs are prized for their deterministic latency, intrinsic anti-alias filtering (no switching ripple), and excellent DC linearity - characteristics that make the AD7863 particularly well suited to digitising sinusoidal signals, transducer outputs, and motor-control feedback. Within the broader taxonomy, the AD7863 sits at: ADC -> SAR ADC -> data converter -> signal-chain IC -> semiconductor. Key differentiating features include the simultaneous-sampling dual-channel topology, integrated 2.5 V reference (eliminating an external reference in many designs), low 50 mW typical power consumption from a single 5 V supply, and a high-speed parallel bus that simplifies connection to DSPs, FPGAs, and microcontrollers. The -10 speed grade is the 175 kSPS through-rate variant and is specified across the -40C to +85C industrial temperature range. Typical applications include three-phase motor control and power-line monitoring, instrumentation and data acquisition systems, multi-axis inertial measurement, industrial process control, and medical patient monitoring where synchronised channel capture is required. The internal reference plus parallel bus keeps the BOM small while preserving measurement integrity.
AD7863ARSZ-3REEL - Dual 14-Bit 175 kSPS ADC | Analog Devices
The Analog Devices AD7863ARSZ-3REEL is a high-speed, low-power, dual 14-bit simultaneous-sampling analog-to-digital converter that operates from a single 5 V supply. The device integrates two 5.2 microsecond successive-approximation ADCs, two track-and-hold amplifiers, an internal 2.5 V reference, and high-speed parallel interface logic in a 28-pin SSOP package, with reel packaging for high-volume assembly. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes. Within the converter hierarchy, successive-approximation register (SAR) ADCs occupy the mid-speed, mid-resolution niche, prized for low latency, deterministic acquisition, and excellent dc accuracy. Simultaneous-sampling SAR ADCs such as the AD7863 capture two channels at exactly the same instant, which is critical for phase-coherent measurements in motor control, power conversion, and instrumentation where vector relationships between signals must be preserved. Key features include four analog input channels arranged as two channel pairs (VA1/VA2 and VB1/VB2), true bipolar input ranges of +/-10 V or +/-5 V (variant dependent -3 is the +/-10 V range), 14-bit resolution with no missing codes, 175 kSPS throughput per ADC, and 5.2 microsecond acquisition time. The internal 2.5 V reference is laser-trimmed for low drift and may be overdriven by an external reference when system-level calibration demands it. Throughput is doubled relative to single-channel architectures because both ADCs sample and convert in parallel. Fabricated in Analog Devices' LC2MOS mixed process, which combines bipolar precision circuits with low-power CMOS logic, the AD7863 achieves high dynamic performance including 80 dB SNR and 90 dB channel-to-channel isolation at the input frequency band. These ac specifications support demanding signal-processing applications such as phased-array sonar, adaptive filters, and spectrum analysis. The parallel interface is directly compatible with standard DSPs and microcontrollers, simplifying system integration. Typical applications include three-phase motor control and power-line monitoring where simultaneous current and voltage sampling is mandatory, multi-axis industrial servo drives, data acquisition systems, and instrumentation requiring synchronized multi-channel measurement. The wide bipolar input range allows direct connection to current shunts, voltage dividers, and transducer bridges without external signal conditioning. Designers should evaluate input common-mode considerations when both channels must reject the same noise, and consider the internal reference bypass requirement of 0.1 microfarad ceramic capacitors on VREF to AGND. The SSOP-28 footprint is footprint-compatible with the AD7863ARZ-3 (SOIC-28) at the schematic level only - PCB layout differs because of the narrower body width. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single decision-ready reference for sourcing and replacement.
AD7863ARZ-2REEL - Dual 14-Bit 175 kSPS Simultaneous-Sampling ADC | Analog Devices
The Analog Devices AD7863ARZ-2REEL is a high-speed, low-power, dual 14-bit successive-approximation analog-to-digital converter (SAR ADC) operating from a single 5 V supply, housed in a 28-pin SOIC (R-28) wide-body package rated for the industrial temperature range. It integrates two 5.2 μs SAR ADCs, two on-chip track-and-hold amplifiers, an internal 2.5 V reference (with option for external reference), and a high-speed parallel interface capable of 175 kSPS per channel with simultaneous sampling across both channels via a single CONVST edge. Input range is software-configurable to either 0 V to +5 V or ±10 V unipolar/bipolar modes, supported by four analog inputs multiplexed into two ADC channels through the A0 logic input. What is a simultaneous-sampling ADC? A simultaneous-sampling ADC is a data-converter architecture that captures two or more analog signals at the exact same instant through dedicated track-and-hold stages, then digitizes each channel in turn. This matters in motor-control, power-conversion and instrumentation systems where the phase and amplitude relationship between two voltages or currents must be preserved - sequential ADCs would smear that relationship over time. Simultaneous-sampling SAR ADCs sit within the broader hierarchy of data converters (ADC) → SAR ADC → precision ADC → signal-chain IC, and they are the precision counterpart to delta-sigma ADCs that trade speed for resolution. Key features include 175 kSPS throughput per channel, ±10 V and 0 V-to-5 V input ranges, 4-channel analog input multiplexing, internal 2.5 V reference (also configurable for external reference), single-supply 5 V operation with low 12 mW typical power dissipation, and an on-chip output register that buffers the last conversion result. The wide-body 28-SOIC package delivers robust thermal performance and easy hand-solder-friendly lead pitch for industrial and instrumentation layouts. AC dynamic performance (SNR, SINAD) makes the part suitable for phasor measurement, vibration analysis, and closed-loop control loops where both channels must be sampled within a single conversion cycle. Fabricated in Analog Devices' Linear-Compatible CMOS (LC²MOS) process, the AD7863ARZ-2REEL pairs precision bipolar analog front-ends with low-power CMOS logic to achieve the simultaneous-sampling behavior of a sample-and-hold subsystem on a single die, removing the need for external track/hold circuitry. The high-speed parallel interface also supports asynchronous conversion starts and provides a BUSY output plus an EOC (end-of-conversion) flag, simplifying host-microprocessor or DSP handshaking. The on-chip reference (with buffered output to VREF) eliminates an external reference component in many designs. Typical applications include 3-phase motor current and voltage sensing for variable-frequency drives, power-line phasor measurement and protective relays, multi-axis industrial data-acquisition front-ends, sonar and acoustic beam-forming front-ends, and vibration monitoring on rotating machinery. Simultaneous-sampling behavior is essential wherever phase relationships carry information - the AD7863ARZ-2REEL's 5.2 μs conversion time keeps channel-to-channel skew in the sub-microsecond regime, well within the timing budgets of 50/60 Hz power-system and 1-10 kHz motor-control loops. Design tip: when using the internal 2.5 V reference, place two 0.1 μF ceramic decoupling capacitors as close as possible to the VREF and AGND pins to minimize reference-noise coupling into the conversion result. When using an external reference, choose a low-noise, low-drift source such that reference noise does not become the limiting factor on the ADC's ac performance. This page synthesizes distributor pricing tiers, drop-in alternatives, and engineering design guidance drawn from the Analog Devices AD7863 datasheet and the real-world purchasing data on DigiKey, Mouser, and Octopart - information not bundled in any single manufacturer document.
AD7865BSZ-2 - 14-Bit 4-Ch Simultaneous-Sampling 350kSPS ADC | ADI
The Analog Devices AD7865BSZ-2 is a fast, low-power, four-channel simultaneous-sampling 14-bit successive-approximation analog-to-digital converter (SAR ADC) in a 44-pin MQFP (10x10 mm) package. It operates from a single +5 V supply, integrates four track-and-hold amplifiers, an internal 2.5 V reference, an on-chip clock oscillator, and a high-speed parallel interface, and is specified at 350 kSPS per channel with a 2.4 µs successive-approximation conversion time per channel. The "-2" variant of the AD7865 family is configured for bipolar analog input ranges of ±5 V or ±10 V (HW/SW-selected) to interface directly with industrial ±10 V signal chains without external level shifting. A SAR (successive-approximation register) ADC is a type of Nyquist-rate converter that resolves one bit per clock cycle using an internal binary-search algorithm against a precision DAC; compared with delta-flush, flash, or pipeline ADCs, SAR converters are favored when high absolute DC precision, low latency, and low power dissipation must coexist. As a member of the broader data-converter category, the AD7865 belongs to the simultaneous-sampling ADC class used where multiple signals must be digitized at exactly the same instant - critical for phase-sensitive power, motor-control, and instrumentation applications. The simultaneous-sampling architecture eliminates the inter-channel phase error that plagues multiplexed-input ADCs in multi-phase systems. The AD7865BSZ-2 achieves 14-bit no-missing-code performance with 0.35 µs track-and-hold acquisition time, 80 dB SNR at 50 kHz input, and HW/SW-selectable bipolar input ranges (±5 V / ±10 V). The on-chip 2.5 V reference eliminates an external precision reference, and the high-speed parallel interface supports direct connection to DSPs, microcontrollers, and FPGAs. Compared with multiplexed multi-channel ADCs, the four simultaneous track-and-hold amplifiers preserve phase relationships between channels, which is essential for vector measurements in power-control loops and three-phase motor drives. Typical applications include three-phase motor control and inverter feedback, multi-axis industrial servo systems, simultaneous AC-line voltage and current monitoring, data-acquisition front ends for ±10 V industrial signal chains, power-quality and power-metering analyzers, and vibration/acoustic instrumentation. The wide bipolar input range allows direct digitization of industrial ±10 V signals without external signal conditioning. When designing with the AD7865BSZ-2, place the recommended 0.1 µF and 10 µF decoupling capacitors as close as possible to AVDD/DVDD pins to maintain SNR. The parallel interface may require external bus-isolation resistors when driving long PCB traces or backplanes. For system-level calibration, allow a 1 µs settling window between successive conversions and avoid driving the track-and-hold inputs beyond the absolute maximum ratings during fault events. This page synthesizes distributor pricing, drop-in AD7865-family alternatives, and practical design notes not found in the manufacturer datasheet, all aligned to the 2026-10-06 reference date.
AD7865YSZ-1 - 14-Bit 350kSPS Quad Simultaneous-Sampling ADC | ADI
The Analog Devices AD7865YSZ-1 is a 14-bit, 350 kSPS, 4-channel simultaneous-sampling successive approximation register (SAR) analog-to-digital converter in a 44-pin MQFP (10x10 mm) package, supplied from a single +5 V rail. The -1 input variant accepts ±10 V or 0 V to +5 V bipolar input ranges, with hardware or software channel selection and a per-channel throughput of 2.4 µs conversion time (≈380 kSPS aggregate when channels are multiplexed). What is a simultaneous-sampling SAR ADC? A simultaneous-sampling ADC integrates one track-and-hold amplifier per channel so that all four input signals are captured at exactly the same instant; this preserves phase relationships in multi-phase systems such as three-phase motor control or four-quadrant power monitoring. SAR architecture delivers deterministic latency and no pipeline delay, which makes the AD7865 well suited to closed-loop control where conversion determinism is critical. The device integrates four track/hold amplifiers, a 2.5 V on-chip reference, an on-chip clock oscillator, signal-conditioning input scalers, and a high-speed parallel microprocessor-compatible interface. Hardware or software selection of input channels (VIN1..VIN4) lets the user convert all four channels simultaneously, or sequence through them under software control. Power consumption is typically 115 mW at full throughput, dropping under software power-down for portable or battery-backed applications. Typical applications include AC motor control and three-phase power metering, data acquisition systems for industrial process control, multiphase vibration and inertial measurement, instrumentation and medical imaging front-ends, and any multi-channel control loop where phase coherence between channels is required. The wide ±10 V input range also suits direct connection to current shunts and transducer bridges after scaling. When designing with this part, observe the analog input common-mode and ESD handling rules in the AD7865 datasheet, keep the analog/digital grounds separated at a single point, and respect the 44-MQFP thermal envelope when operating at the full 350 kSPS throughput at elevated ambient temperatures.
AD7872AN - 14-Bit 83 kSPS Sampling ADC | Analog Devices
The Analog Devices AD7872AN is a complete 14-bit successive-approximation analog-to-digital converter (SAR ADC) with a maximum throughput of 83 kSPS, housed in a 16-pin PDIP (N-16) through-hole package. The device integrates a track/hold amplifier, 14-bit ADC core, voltage reference, and three digital interface options - parallel, byte-wide, and serial - making it a drop-in solution for data-acquisition systems that previously required several discrete components. A SAR ADC (Successive-Approximation Register ADC) is a type of precision analog-to-digital converter that converts an input voltage to a digital code by sequentially comparing it against a precision reference using a binary search. SAR ADCs sit in the broader product hierarchy of ADC -> data converter -> mixed-signal IC -> semiconductor, and are favored for applications needing high DC accuracy and deterministic latency with no pipeline delay, in contrast to sigma-delta or pipeline architectures. Key features of the AD7872AN include 80 dB SNR at 10 kHz input frequency, 57 ns data-access time, ±5 LSB maximum integral nonlinearity (INL), bipolar ±10 V or unipolar 0 to +10 V input range (software configurable), and 50 mW typical power dissipation. The part uses Analog Devices' proprietary LC2MOS mixed-technology process and is specified for both DC accuracy and dynamic performance. Architecturally, the device combines a low-noise input amplifier, a buried Zener voltage reference, and a successive-approximation register with a precision DAC on a single die. The bipolar input stage uses a proprietary chopping technique that keeps integral linearity error below ±5 LSB over the industrial temperature range, while the high-speed comparator enables the 57 ns data-access time needed for high-speed parallel interface designs. Typical applications include industrial process control, instrumentation, spectrum analysis, and DSP front-ends. The wide input range and bipolar capability also suit motor-control current sensing and high-accuracy data-acquisition front-ends where a complete single-chip ADC with on-chip reference simplifies the BOM. Design consideration: the input signal source impedance should be kept below 1 kohm to avoid conversion errors caused by the input amplifier's bias current; add a 100 ohm series resistor with a 10 nF input capacitor for wideband noise filtering on high-impedance sensors. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
AD7873ARQZ - 12-Bit Touch Screen Digitizer ADC | Analog Devices
The Analog Devices AD7873ARQZ is a 12-bit successive approximation analog-to-digital converter (SAR ADC) with a synchronous serial interface and integrated low on-resistance switches designed to drive 4-wire resistive touch screens. It operates from a single 2.2 V to 5.25 V supply and delivers a throughput rate of 125 kSPS, packaged in a 16-pin QSOP (RQ-16). A touch screen digitizer is a specialized mixed-signal IC that combines an analog-to-digital converter, an integrated voltage reference, low-impedance analog switches, and coordinate-measurement firmware support. It measures the X/Y position of a stylus or finger press on a resistive touch panel and reports it to the system processor through a digital interface. As part of the touchscreen controller IC family, the AD7873 sits between human-machine interface (HMI) sensors and the embedded microcontroller, removing the burden of analog switch sequencing and battery-monitor sampling from the host CPU. Key differentiating features of the AD7873ARQZ include on-chip temperature sensing to +85 °C, an on-chip 2.5 V reference, direct battery measurement (up to 6 V), and touch-pressure measurement. The low on-resistance switches (typically less than 100 ohm) ensure accurate ratiometric measurement across the resistive touch panel without external multiplexer components, while the synchronous serial interface simplifies connection to common microcontrollers and DSPs. Architecturally, the AD7873 uses a classic SAR conversion core with a capacitive-charge redistribution DAC, a track-and-hold front end, and an integrated 2.5 V bandgap reference. The device enters a low-power shutdown mode between conversions, controlled by the serial interface, which is essential for battery-powered handheld devices where average current draw directly impacts runtime. Ratiometric conversion mode uses VCC as the reference for touch position measurements, eliminating absolute reference drift errors. Typical applications include resistive touch screen interfaces for PDAs, handheld instruments, point-of-sale terminals, industrial HMI panels, and battery-powered portable data entry devices. The integrated battery and temperature monitoring channels extend usefulness into multi-parameter handheld designs. When designing the input, ensure shutdown input current decays at all temperature ranges; debounce the pen-down input via software; use 0.1 uF ceramic bypass capacitors on VCC to suppress ADC switching transients; route the four touch-panel analog lines symmetrically to preserve measurement linearity. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7875LPZ-REEL - 12-Bit 100kHz Sampling ADC | Analog Devices
The Analog Devices AD7875LPZ-REEL is a complete monolithic 12-bit analog-to-digital converter (ADC) with on-chip track-and-hold amplifier, internal reference, and parallel/byte/serial digital interface, sampling at 100 kSPS in a 28-pin PLCC (LCCC, MO-047AB, LCC-28) package. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes, enabling microcontrollers, DSPs, and processors to interpret real-world signals. The AD7875 belongs to the successive-approximation-register (SAR) ADC category, which uses an iterative binary-search algorithm with an internal DAC to perform each conversion in a fixed number of clock cycles. SAR ADCs sit within the broader data-converter family, alongside delta-sigma and pipeline architectures, and are favored for multi-channel multiplexed and DC/front-end signal acquisition where deterministic latency and low latency are critical. Key features include a 2 µs acquisition track-and-hold front end, 8 µs A/D conversion time, on-chip 2.5 V buried-zener reference laser-trimmed for accuracy, 72 dB SNR at 10 kHz input, ±5 V dual analog supply operation, and three interface modes (12-bit parallel, 8-bit byte, and serial). The 28-terminal J-lead surface-mount package (QCCJ / PLCC) is rated for the commercial 0 °C to +70 °C temperature grade and ships in tape-and-reel format for high-volume assembly. Architecturally, the AD7875 integrates an analog input multiplexer/amplifier, the SAR core, internal reference, clock oscillator, and a flexible digital interface on a single CMOS die. The laser-trimmed buried-zener reference and clock remove two of the largest external bill-of-materials items typical of discrete 12-bit ADC designs, shrinking PCB area and improving long-term gain stability. Typical applications include industrial process control front ends, multichannel data-acquisition boards, motor-control feedback loops (shaft position, current sense), and instrumentation signal inputs where 12-bit resolution and 100 kSPS throughput are sufficient. The on-chip reference also makes the part attractive for portable or space-constrained designs where an external reference would be impractical. When designing with the AD7875, choose the supply range carefully: ±5 V supplies yield best SNR at the expense of higher power dissipation, while ±3 V operation reduces power at slightly lower dynamic performance. Decouple both AVdd and DVdd pins with 0.1 µF ceramic capacitors placed within 5 mm of the package to keep digital switching noise out of the analog front end. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not available in the bare manufacturer datasheet, providing engineers with a single reference point for sourcing and second-sourcing decisions.
AD7876BR-REEL - 12-Bit 100kHz SAR ADC, 24-SOIC | Analog Devices
The Analog Devices AD7876BR-REEL is a complete 12-bit successive-approximation analog-to-digital converter (ADC) with on-chip track-and-hold, on-chip reference, and parallel/byte/serial digital interface options, housed in a 24-pin SOIC wide-body package. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm and an internal capacitive DAC to convert an analog input voltage into a digital code over a fixed number of clock cycles. The AD7876 belongs to the broader data-converter hierarchy: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. Built on Analog Devices' LC2MOS process, it integrates the entire signal path from analog input to digital word in a single IC, eliminating the external components required by older discrete ADC designs. Key features include a 100 kHz throughput rate, 2 microsecond track-and-hold acquisition time, 8 microsecond ADC conversion time, an on-chip buried-Zener reference laser-trimmed for accuracy, and 72 dB signal-to-noise ratio. The device supports bipolar input ranges of +/-5 V or +/-10 V via the AD7876BR (BR suffix) and offers parallel, byte, and serial interface modes for flexible microcontroller or DSP connectivity. Operating from a single +5 V supply, it consumes approximately 70 mW of power. The AD7876 uses a charge-redistribution switched-capacitor DAC architecture combined with a precision comparator and SAR logic to perform successive approximation. The internal reference and clock eliminate two of the most critical external components in ADC subsystems, reducing board area and improving long-term stability. Dynamic performance is specified for DSP users with SNR and harmonic distortion figures that make it suitable for both DC measurement and AC signal acquisition applications. Typical applications include industrial process control and data acquisition, motor control feedback loops, instrumentation and test equipment, medical instrumentation signal conditioning, and spectrum analysis front-ends. The wide input range and integrated reference make it well suited for industrial 4-20 mA loop digitization with appropriate signal conditioning. When designing with this device, decouple the +5 V supply with a 10 uF tantalum and 0.1 uF ceramic capacitor placed close to the supply pin. The analog input drive amplifier must settle within the 2 us acquisition window to avoid conversion errors. For best noise performance, keep digital and analog grounds separated and joined at a single star point near the ADC. This page synthesizes distributor pricing from 6 sources, drop-in alternatives from the Analog Devices AD787x family and pin-compatible cross-brand parts, and practical design notes not consolidated on any single datasheet or distributor page.
AD7876CR-REEL - 12-Bit 100kHz Sampling ADC | Analog Devices
The Analog Devices AD7876CR-REEL is a complete 12-bit successive-approximation analog-to-digital converter (SAR ADC) with on-chip track-and-hold amplifier and 2.5 V on-chip reference, sampling at up to 100 kHz and housed in a 24-pin SOIC (RW) wide-body package delivered on 13-inch reels. What is a successive-approximation ADC? An SAR ADC is a precision data converter that performs a binary search across an internal capacitive DAC to digitize an analog input, settling one bit per conversion clock. The SAR architecture sits in the converter hierarchy between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest). The AD7876 belongs to the broader category of data converters / signal chain ICs, specifically the precision mid-speed sampling ADC segment used in industrial, instrumentation and DSP front-ends. Key features of the AD7876 include a 2 µs acquisition track-and-hold amplifier, an 8 µs successive-approximation ADC core, ±10 V input range with overvoltage protection, and parallel (8/12-bit), byte, and serial digital interface options. The part delivers 72 dB SNR at a 10 kHz input and is fully specified for dynamic DSP parameters including signal-to-noise ratio, harmonic distortion and intermodulation distortion. Internal laser-trimmed scaling resistors and reference settle to within ±1 LSB. Architecturally, the AD7876 integrates a bipolar input front-end (resistor-scaled ±10 V), input protection clamps, the track/hold, the 2.5 V buried-Zener reference, the SAR logic and clock oscillator, plus a flexible three-state digital output port. The -REEL suffix indicates the tape-and-reel packaging option for high-volume SMT assembly. Operating from +5 V (VDD) and -5 V (VSS) supplies, it draws approximately 15 mW of power. Typical applications include industrial process control loops, multi-channel data acquisition systems, precision instrumentation, DSP front-ends, motor control position feedback and portable battery-powered measurement equipment. The wide ±10 V input range and dynamic specifications make it particularly suited to digitizing signals after sensor conditioning. When designing with the AD7876, provide well-bypassed analog and digital supplies and route AGND and DGND as a star ground to the system analog ground. For best dynamic performance in DSP applications, refer to the manufacturer's recommended layout in the datasheet. This page synthesizes distributor stock and pricing, drop-in cross-reference alternatives, and practical design notes not found in the manufacturer datasheet alone.
AD7878JPZ-REEL - 12-Bit 100kHz SAR ADC | Analog Devices
The Analog Devices AD7878JPZ-REEL is a complete 12-bit analog-to-digital converter (ADC) with a maximum throughput of 100 kHz, integrating a track/hold amplifier, voltage reference, 8-word FIFO, and DSP-compatible serial interface into a single IC. Housed in a 28-pin PLCC (11.51 x 11.51 mm) plastic leaded chip carrier package, this successive-approximation-register (SAR) ADC operates from a single +5 V analog supply and a -5 V to -3 V negative supply, accepting bipolar input ranges of ±3 V or ±10 V (depending on configuration). According to the Analog Devices AD7878 datasheet, the converter delivers 2 microsecond acquisition time and 7 microsecond conversion time, with input voltage tolerance up to ±3 V as documented in the verified supplier listings. A successive-approximation-register ADC is a converter architecture that resolves one bit per clock cycle using an internal binary-weighted capacitor network and a comparator, then a digital-to-analog converter (DAC). This topology delivers deterministic latency, excellent DC accuracy, and inherently anti-alias-friendly sampling, making it preferred for multiplexed data-acquisition systems, motor-control feedback loops, and DSP front-ends where latency must be bounded. Within the broader converter hierarchy, SAR ADCs sit between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, lowest bandwidth), with the AD7878 occupying the high-speed 12-bit niche favored in industrial control and instrumentation. Key features of the AD7878JPZ-REEL include: 8.3 kSamples/sec nominal throughput (per third-party spec sheet), 2 us track/hold acquisition time, 7 us conversion time, internal 3 V Zener reference, 8-word FIFO buffer for DSP handshake efficiency, and on-chip DSP-compatible serial interface logic. The LC2MOS (Linear Compatible CMOS) process combines precision bipolar analog stages with low-power CMOS digital logic, enabling the integrated DSP-ready interface without external glue logic. The commercial temperature grade (0 C to +70 C) suits indoor industrial, instrumentation, and laboratory equipment. Typical applications span process-control front-ends, multiplexed data-acquisition systems, DSP-input signal chains, motor-control position feedback, and laboratory instrumentation. The on-chip FIFO is particularly valuable when the host processor (DSP or microcontroller) cannot service every conversion interrupt; the 8-word depth absorbs timing jitter and reduces interrupt overhead. When designing with this part, ensure both +5 V (VDD) and -5 V (or -3 V) negative supplies are decoupled with 0.1 uF ceramic capacitors placed within 5 mm of the supply pins, and observe the maximum throughput vs. acquisition/conversion timing budget described in the datasheet timing section. The bipolar input requires input-signal conditioning to scale within the ±3 V (default) or ±10 V (with attenuation) input range. This page synthesizes distributor pricing, drop-in same-package alternatives, and PCB-level design guidance not found in the bare manufacturer datasheet, with parameters sourced from Analog Devices, DigiKey, Mouser, Octopart, and third-party spec repositories as of 2026-10-12.
AD7878KPZ-REEL - 12-Bit 100kHz SAR ADC, DSP Interface | Analog Devices
The Analog Devices AD7878KPZ-REEL is a 12-bit successive-approximation analog-to-digital converter (SAR ADC) with a 100 kHz sampling rate, packaged in a 28-pin PLCC (J-Lead) form factor supplied on tape and reel. It integrates a track-and-hold amplifier with 2 µs acquisition time, the SAR core, an on-chip 3 V Zener reference, and an 8-word deep FIFO plus DSP interface logic in a single LC2MOS mixed-technology die. Operating from ±5 V analog supplies (or +5 V only with -5 V derived), the device delivers 72 dB signal-to-noise-plus-distortion ratio across commercial 0 °C to +70 °C ambient temperatures. A SAR ADC is a successive-approximation register analog-to-digital converter, a class of precision data converter that uses a binary-search algorithm and an internal precision DAC to compare the sampled input against successively halved reference voltages. SAR ADCs sit within the broader hierarchy of ADC architectures (SAR -> Nyquist-rate ADC -> data converter -> mixed-signal IC -> semiconductor), and are favored for applications that demand deterministic latency, no pipeline delay, and excellent DC accuracy in multiplexed or single-channel measurement front ends. Differentiating specifications include a 2 µs track-and-hold acquisition window, 7 µs A/D conversion time, 8-word FIFO buffer that decouples the DSP from sample timing, and DSP-port glue logic that lets the converter stream samples directly into Blackfin, SHARC, or TMS320-family processors with minimal host overhead. The LC2MOS process combines low-noise precision bipolar analog blocks with low-power CMOS digital logic, yielding the accuracy of bipolar ADCs at CMOS power levels. Architecturally, the AD7878 combines a switched-capacitor input stage, a charge-redistribution DAC array, a successive-approximation register, and an asynchronous DSP-compatible parallel/serial port. The internal Zener reference eliminates an external reference component, simplifying BOM while keeping gain error within calibration limits. Designers use the AD7878 when deterministic 100 kHz throughput, FIFO-buffered DSP streaming, and an integrated reference are all required simultaneously. Typical applications span industrial process-control front ends, motor-control current/voltage sensing, multi-channel data-acquisition boards for DSP-based systems, sonar and audio front ends, portable instrumentation, and embedded measurement modules. The 28-pin PLCC package is a JEDEC-standard plastic-leaded chip-carrier footprint compatible with widely available sockets and SMT assembly processes. When laying out a board, route the analog inputs as differential microstrip with a solid ground pour, place the 0.1 µF +VCC and -VCC bypass capacitors within 5 mm of the supply pins, and keep the digital DSP-port traces short and impedance-controlled to avoid coupling noise back into the analog front end. This page synthesizes distributor pricing, drop-in 12-bit SAR alternatives, application-specific design notes, and compliance information not bundled together on the manufacturer datasheet, giving engineers a single decision-ready reference for the AD7878.