ADC/DAC
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ADC0809CCN - 8-Bit 8-Channel SAR ADC | 10kSPS | 28-DIP
The Texas Instruments ADC0809CCN is a monolithic CMOS 8-bit analog-to-digital converter with an integrated 8-channel analog multiplexer, microprocessor-compatible control logic, and a successive-approximation register (SAR) architecture. It samples at up to 10 kSPS, operates from a single 4.5 V to 5.25 V supply, and is housed in a 28-pin PDIP through-hole package. The on-chip 256R ladder and chopper-stabilized comparator deliver ±1 LSB linearity with no missing codes, while the tri-state output latch supports direct bus connection to 8080/8051/6800-family microprocessors. What is a SAR ADC? A successive-approximation register ADC is a precision data converter that performs binary search against the input voltage using an internal DAC and comparator, producing one bit per clock cycle. SAR ADCs combine low latency, deterministic conversion time, and moderate resolution (typically 8 to 20 bits), making them the dominant architecture for multiplexed data-acquisition systems, motor control loops, and instrumentation front ends where DC accuracy and ease of microprocessor interfacing outweigh absolute sample rate. Key features of the ADC0809CCN include 8 single-ended analog input channels selected by a 3-bit address latch, an end-of-conversion (EOC) output flag that triggers a CPU interrupt or status read, a programmable clock up to 1.1 MHz, and TTL/CMOS-compatible I/O that simplifies level shifting to 3.3 V or 5 V MCUs. The 256R voltage-divider reference ladder and chopper-stabilized comparator suppress input offset drift across the -40 °C to +85 °C industrial temperature range, enabling stable 8-bit readings without periodic recalibration in process-control panels and benchtop instrumentation. The device uses a switched-capacitor DAC ladder that inherently tracks the analog input, providing excellent common-mode rejection of supply noise. Its 10 kSPS ceiling is well-matched to thermocouple, RTD, and process-variable sampling, while the integrated multiplexer eliminates the need for an external analog switch array, reducing both BOM cost and PCB area in legacy industrial designs. Typical applications include multi-zone temperature monitoring, factory-floor sensor aggregation, panel-meter and digital-multimeter front ends, legacy 8051-based process controllers, and battery-cell monitoring in uninterruptible power supplies. The DIP-28 footprint also makes it a popular drop-in for educational labs and retrocomputing ADC boards. When designing with this part, place a 0.1 µF decoupling capacitor as close as possible to VCC and a 10 µF bulk capacitor at the analog supply; the internal reference ladder draws transient current during each bit trial and is sensitive to supply ripple. Avoid driving unused analog inputs with floating signals - tie them to a defined mid-supply voltage to prevent channel-to-channel crosstalk through the multiplexer. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster sourcing and lifecycle decisions for new designs and legacy maintenance.
ADC0809CCN/NOPB - 8-Bit 8-Ch µP-Compatible A/D Converter DIP-28
The Texas Instruments ADC0809CCN/NOPB is an 8-bit microprocessor-compatible analog-to-digital converter with an 8-channel analog multiplexer, successive-approximation register, and 3-state output latches, housed in a 28-pin PDIP (N) through-hole package. It converts up to 8 single-ended analog inputs at a sampling rate of approximately 10 kSPS using a single +5 V analog supply plus a separate +5 V digital supply, and provides TTL-compatible parallel outputs with on-chip address latches. An ADC (analog-to-digital converter) is an integrated circuit that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or logic circuits. The ADC0809 family belongs to the successive-approximation ADC (SAR ADC) category, which uses an internal DAC and comparator to perform a binary search against the input voltage each conversion cycle. Within the broader power-management and data-acquisition hierarchy, the ADC0809 sits at the bridge between analog sensors and digital control systems, often paired with op-amps for signal conditioning and voltage references for absolute accuracy. Key features include 8 single-ended input channels selected via three address lines (A, B, C) and an address-latch enable, on-chip +5 V reference scaling for the analog comparator, easy interface to most 8-bit microprocessors via standard control signals (START, EOC, OE, ALE), low power dissipation of approximately 15 mW, and ±½ LSB and ±1 LSB linearity grades. The dual-supply topology (VCC analog and VDD digital) reduces digital switching noise coupling into the analog conversion path. The ADC0809 uses CMOS switching logic and an internal ladder-network DAC, with a successive-approximation register clocked by an external RC or external clock. Conversion completes in approximately 100 µs, and the EOC (End of Conversion) output signals completion to the host processor. Its TTL-compatible bus interface enables direct connection to 8080, 8085, Z80, and similar legacy microprocessor buses without external glue logic. Typical applications include data-acquisition front-ends, process-control instrumentation, industrial PLC analog input modules, panel-meter and digital-multimeter designs, and legacy 8-bit microcontroller-based sensor interfaces. The wide analog input span (0 V to VREF) and 8-channel multiplexer make it ideal for reading multiple slow-changing sensors with a single ADC resource. When using this device, observe the dual-supply decoupling practice - place 0.1 µF ceramic capacitors close to both VCC (analog) and VDD (digital) pins, and a 10 µF tantalum bulk capacitor on each rail. Use the address-latch enable (ALE) to qualify channel selection, and gate the output enable (OE) before reading the data bus to avoid bus contention. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
ADC081000CIYB - 8-Bit 1 GSPS ADC, 128-HLQFP | Texas Instruments
The Texas Instruments ADC081000CIYB is a high-performance, low-power 8-bit analog-to-digital converter that digitizes signals at sampling rates up to 1 GSPS (Giga-Samples Per Second). The device uses a folding and interpolating architecture with an internal sample-and-hold amplifier and an internal reference, packaged in a 128-pin thermally-enhanced HLQFP (20 mm x 20 mm) with an exposed die-attach pad. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts a continuous-time analog voltage or current into a discrete digital code. The ADC081000 sits in the high-speed pipeline / folding-and-interpolating converter family, which combines pipelined sub-ranges with analog interpolation stages. This hierarchy positions it within power-management-adjacent data-conversion ICs, frequently co-designed with high-performance DACs in transmit/receive signal chains, oscilloscopes, and digital sampling oscilloscope front ends. Key features of the ADC081000 include 7.0 effective bits at 500 MHz input (typical), a 1.4 GHz full-power analog input bandwidth, low latency suitable for real-time systems, and selectable LVDS or DDR CMOS output formats that ease interface to Xilinx and Altera FPGAs. The internal reference eliminates external reference noise injection, while the differential PECL/LVDS-compatible clock input supports sub-picosecond jitter generation when fed from a clean source. Power dissipation is approximately 1.4 W at 1 GSPS from a single 1.9 V analog supply plus 1.9 V digital supply. The folding/interpolating topology partitions the 8-bit conversion into coarse and fine sub-conversions, then uses analog interpolation to resolve the fine bits. This architecture avoids the latency typical of long pipelined stages while still achieving multi-hundred-MHz sample rates, making the ADC081000 well suited to time-domain instrumentation. The exposed-pad HLQFP provides a thermal resistance around 18 C/W junction-to-case, supporting 1 GSPS sustained operation with proper PCB thermal relief. Typical applications include digital oscilloscopes, spectrum analyzer IF digitizers, radar IF sampling, high-end test-and-measurement equipment, and digital pre-distortion feedback loops for wireless infrastructure. Its 1 GSPS rate aligns naturally with 500 MHz analog front ends needed in pulsed-RF instrumentation and optical sampling front-ends. When designing with this part, place the exposed-pad copper pour on at least four inner PCB layers stitched by a 4 x 4 thermal via array to keep junction temperature below 110 C. Use differential clock routing with 100 ohm controlled impedance and length-match data lanes within ±20 ps to avoid inter-symbol jitter; a stable, low-jitter clock source such as TI's LMK04800 clock conditioner is recommended. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ADC08131CIWM - 8-Bit Serial I/O ADC with Mux & Vref | TI
The Texas Instruments ADC08131CIWM is an 8-bit high-speed successive-approximation analog-to-digital converter with serial MICROWIRE-compatible I/O, an integrated 2-channel analog multiplexer, on-chip voltage reference, and track-and-hold, housed in a 14-pin SOIC Wide (SOIC W) package. It operates from a single 4.5 V to 6.3 V analog supply and draws only a few milliwatts, making it a self-contained data-acquisition front end for cost-sensitive designs. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a comparator, a DAC, and a successive-approximation register to converge on the input voltage in N clock cycles for an N-bit code. SAR ADCs occupy the middle of the converter hierarchy: slower than flash ADCs but faster than integrating ADCs, with zero pipeline latency and excellent DC accuracy. They are the dominant choice for multiplexed multi-channel sampling at moderate speeds, sitting between delta-sigma ADCs (slower, higher resolution) and pipeline ADCs (faster, higher power) within the broader data-converter / signal-chain / power-management IC taxonomy. Key specifications include 8-bit resolution, a serial MICROWIRE/QSPI/SPI-compatible interface, an internal 2.048 V or 5 V bandgap-style reference, a 2-input analog multiplexer, differential track-and-hold, and guaranteed operation across the full -40 C to +85 C industrial temperature range. The IWM suffix denotes the wide-body SOIC-14 (PDSO14) package for improved thermal performance and easier hand-soldering versus the narrow-body SO-14. The architecture combines a charge-redistribution DAC with a successive-approximation register clocked by an external serial clock, producing deterministic N-cycle conversions with no pipeline delay. The on-chip reference eliminates the external reference cost and PCB area, while the 2-channel mux lets the part time-share one ADC across two sensors. Typical applications include portable instrumentation, panel meters, sensor signal conditioning, process-control analog front ends, point-of-sale terminals, and battery-powered handheld measurement tools. The wide SOIC-14 package also supports industrial controllers and HVAC sensor read-back. Design tip: When using the internal reference, bypass REF (pin 12) with a 1 uF tantalum plus 0.1 uF ceramic network directly at the pin to keep reference noise out of conversions. If two input channels are not required, tie VIN(-) to VIN(+) or to mid-scale for single-ended readings. This page synthesizes distributor pricing, drop-in same-package alternatives, and application-focused design notes that go beyond what the bare datasheet provides, enabling faster part selection and PCB reuse.
ADC08134CIWMX - 8-Bit 4-Ch SAR ADC, Serial I/O | Texas Instruments
The Texas Instruments ADC08134CIWMX is an 8-bit, 4-channel successive-approximation analog-to-digital converter with a high-speed serial (NSC MICROWIRE-compatible) interface, housed in a 14-pin SOIC wide-body (0.295-inch / 7.50 mm width) package supplied on Tape & Reel. As one of the ADC08131/ADC08134/ADC08138 family, it integrates an input multiplexer, voltage reference, and track/hold amplifier on-chip, simplifying mixed-signal designs by replacing a multi-IC front end with a single converter. Key features include 8-bit resolution, 4 analog input channels, a SAR conversion architecture optimized for low-power operation, and an on-chip reference. The serial interface reduces pin count and eases isolated or remote-sensor designs where galvanic isolation of the data path is required. The wide SOIC-14 package provides industry-standard land pattern compatibility with the rest of the ADC0813x family, which simplifies PCB layout reuse across single, dual, and multi-channel variants. The device belongs to the successive-approximation ADC category, a subtype of data-converter ICs used wherever low-latency, deterministic sampling of one or more analog inputs is required. SAR ADCs sit between sigma-delta ADCs (which offer higher resolution at lower speeds) and flash ADCs (highest speed, lowest resolution). ADC SARs deliver one conversion per acquisition cycle, making them well suited to multiplexed sensor monitoring where a microcontroller reads many channels in sequence. The part was originally introduced by National Semiconductor and is now served by Texas Instruments following acquisition of that business, with the datasheet titled "ADC08131/ADC08134/ADC08138 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function." Industrial temperature grade and gull-wing SOIC terminal form make it suitable for through-hole-style reflow on standard SMT lines. Typical applications include industrial process-control analog front ends, multi-sensor data acquisition boards, battery monitoring multiplexed inputs, and remote transducer digitizer modules. The combination of on-chip reference and track/hold makes the ADC08134CIWMX attractive for cost-sensitive designs where a separate reference IC and sample-and-hold would otherwise add bill-of-materials cost. Design consideration: when migrating to or from this part, note that the family pinout differs by channel count - verify MUX outputs and serial timing against the target datasheet before reuse. The track/hold acquisition time and serial clock frequency together bound the per-channel throughput and must be sized so the multiplexer settling plus conversion plus acquisition fits the system sample budget. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ADC08138CIWM - 8-Bit 8-Ch Serial ADC w/ Vref, T/H | TI
The Texas Instruments ADC08138CIWM is an 8-bit, 8-input, successive-approximation-register (SAR) analog-to-digital converter with high-speed serial I/O, integrated multiplexer, internal voltage reference, and track-and-hold function, housed in a 20-pin SOIC Wide (7.5 mm body) package. It supports a single +5V analog supply and converts up to 8 analog input channels through an internal analog mux, with a maximum conversion time on the order of microseconds for high-speed data acquisition. An SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm to step through each bit of the output code, comparing the input voltage against an internal DAC at every clock cycle. SAR ADCs sit within the broader hierarchy of data converters -> ADCs -> SAR ADCs -> semiconductor ICs -> power management and signal chain. They are favored for applications requiring deterministic latency, low latency at moderate sample rates, and good DC accuracy with no pipeline delay, making them ideal for industrial control loops and multiplexed sensor scanning. Key features include 8 single-ended analog input channels, an on-chip sample-and-hold amplifier, an internal 2.5V bandgap voltage reference (with REFIN/REFOUT capability), an NSC MICROWIRE-compatible serial interface (also SPI-compatible), software-configurable analog input configuration, and a wide operating temperature range from -40C to +85C. The 20-SOIC Wide package offers industry-standard pin compatibility for legacy through-hole-style PCB footprints and is suitable for hand-soldered prototypes. The device implements a charge-redistribution SAR architecture with an internal clock and on-chip track-and-hold, eliminating the need for an external sample-and-hold circuit or external reference. The serial MICROWIRE interface reduces pin count and PCB routing complexity compared to parallel-output ADCs, while still allowing daisy-chaining of multiple converters on a single 3-wire bus for higher channel-count systems. Typical applications include multichannel data-acquisition systems, industrial process control and instrumentation, portable battery-powered measurement equipment, sensor array digitizers (temperature, pressure, strain), and embedded microprocessorcontroller analog front-ends. The wide SOIC package also simplifies hand prototyping and rework in low-volume or legacy designs. When designing with this device, ensure that the analog input impedance is low enough to settle the internal sample capacitor within the acquisition window. A 0.1uF bypass capacitor close to the VCC pin and a clean analog ground are essential to keep digital switching noise out of the analog input. The serial interface timing must respect the device's specified clock and frame constraints to avoid data corruption. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including verified pinout, parametric equivalents in the same 20-SOIC footprint, and best-practice PCB layout guidance.
ADC08138CIWMX - 8-Bit Serial I/O ADC, 8-Ch MUX, SOIC-20 | Texas Instruments
The Texas Instruments ADC08138CIWMX is an 8-bit high-speed serial I/O analog-to-digital converter (ADC) with configurable input multiplexer options, an internal voltage reference, and a track-and-hold front end, housed in a 20-pin SOIC (IWM) wide-body package supplied on tape and reel. It uses a successive-approximation-register (SAR) architecture and exposes an NSC MICROWIRE-compatible serial data interface, achieving the 8-bit conversion with a single 5 V analog supply while delivering the multiplexed-channel flexibility demanded by sensor-conditioning and industrial-control front ends. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a type of data converter that resolves an analog input to its digital code by binary-searching one bit per clock cycle against a precision reference voltage. SAR ADCs sit within the broader hierarchy of data-converter ICs (ADC/DAC -> ADC -> SAR ADC -> semiconductor). They are valued for low latency, deterministic conversion time, and lack of pipeline delay, which makes them the workhorse choice for multiplexed analog front ends, control-loop feedback, and instrumentation where a fresh sample per channel must be guaranteed every cycle. Key features include 8 input channels routed via a configurable analog multiplexer, a built-in 2.5 V bandgap reference (usable or bypassable), on-chip track-and-hold, NSC MICROWIRE-compatible serial I/O for glueless MCU/SPI-host connection, and single 5 V supply operation. The wide-body 20-SOIC (IWM) package gives 7.50 mm body width for robust through-hole-free board assembly while keeping the footprint compatible with standard 20-pin SOIC land patterns. Architecture depth: the SAR core is paired with a sample/hold that captures the input at the start of each conversion, eliminating the need for an external buffer on multiplexed channels that settle between conversions. The serial MICROWIRE interface shares clock and data lines that map cleanly onto SPI mode-0 peripherals on common microcontrollers, and the device supports daisy-chaining for multi-ADC signal chains. Typical applications include industrial process-control front ends, multi-sensor data acquisition boards, portable instrumentation, panel meters, battery monitoring, and microcontroller-based embedded systems that need 8-bit precision across several analog channels. The wide SOIC-20 footprint also supports hand-solderable prototypes and field-serviceable industrial PCBs. Design consideration: when laying out the ADC08138CIWMX, keep analog and digital ground returns separated and join them at a single point near the IC; the MICROWIRE clock edges must be kept clean (short traces, series resistor if reflections appear) because the serial interface is the only communication channel and any glitch will appear as a stuck-code. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - giving you the cross-reference and layout guidance needed to substitute, source, and deploy the ADC08138CIWMX with confidence.
ADC08161CIWM - 8-Bit 500ns Sigma-Delta ADC w/ 2.5V Ref | TI
The Texas Instruments ADC08161CIWM is an 8-bit, 500 ns analog-to-digital converter with a built-in sample-and-hold function and a 2.5 V bandgap reference, housed in a 20-pin SOIC (7.50 mm) wide-body package. It offers 8-bit resolution, a single differential input, and a maximum conversion time of 500 ns, supporting sampling rates up to roughly 1.5 MS/s while dissipating only 100 mW of power. According to the manufacturer datasheet, the device uses a proprietary multi-step A/D conversion technique that employs a 2-bit voltage estimator to derive the two MSBs followed by two successive low-resolution approximations. An analog-to-digital converter (ADC) is a semiconductor device that translates continuous analog voltages into discrete digital codes, enabling microcontrollers, FPGAs, and DSPs to process real-world sensor signals. The ADC08161 belongs to the medium-speed successive-approximation / multi-step family, sitting hierarchically between general-purpose 8-bit SAR ADCs and high-resolution audio ADCs. Its integrated bandgap reference and S/H front-end simplify bill-of-materials by eliminating external reference and track-and-hold components. Key features include 500 ns typical conversion time, a 2.5 V internal reference (with external override capability), single +5 V single-supply operation, and parallel digital output. The wide-body SOIC-20 package supports legacy through-hole-style PCB footprints and provides adequate thermal dissipation for the 100 mW power budget at moderate ambient temperatures. The ADC08161 is built on a CMOS process that integrates the reference, S/H, and conversion logic on a single die. The multi-step architecture reduces the number of comparison cycles versus a pure SAR implementation, achieving 8-bit accuracy in roughly 14 clock cycles rather than the 8 cycles required by a flash converter. The digital outputs are tri-state capable, allowing multiple devices to share a common microprocessor data bus. Typical applications include process-control analog front ends, industrial instrumentation, portable data-logging, and legacy 8-bit sensor interfaces. Designers choose the ADC08161 when a fast 8-bit conversion with an integrated reference is needed without paying for higher-resolution parts. It is also frequently used in retrofit designs that must mate to existing 8-bit bus architectures. When designing with this device, allow adequate settling time for the S/H capacitor and place a 0.1 uF decoupling capacitor as close to the supply pin as possible. Pay attention to the reference pin bypass - the internal 2.5 V bandgap needs at least 1 uF of local capacitance to maintain low noise on the LSB transitions. This page synthesizes manufacturer specification data, distributor pricing as of 2026-10-12, drop-in same-package alternatives, and practical design notes not consolidated in a single location on the manufacturer datasheet.
ADC081S021CISD - 8-Bit 50-200 ksps SAR ADC | Texas Instruments
The Texas Instruments ADC081S021CISD is a low-power, single-channel CMOS 8-bit analog-to-digital converter (ADC) with a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, supporting sample rates from 50 ksps to 200 ksps. It is housed in a 6-pin WSON (2.2 mm x 2.5 mm) package with an exposed thermal pad, and operates from a single 2.7 V to 5.25 V supply. The converter uses a successive-approximation register (SAR) architecture with an internal track-and-hold circuit. An ADC (analog-to-digital converter) is a semiconductor device that converts a continuous analog voltage or current into a discrete digital code. SAR ADCs in particular perform conversion by binary-search approximation: a comparator and a switched capacitor DAC iteratively narrow the unknown input voltage against internal reference levels over N clock cycles for an N-bit result. SAR ADCs occupy the middle ground between flash converters (fastest, lowest resolution) and sigma-delta ADCs (slowest, highest resolution), and dominate applications requiring single-shot or burst-mode acquisition with deterministic latency. ADC081S021 belongs to the data-converter -> ADC -> SAR ADC -> 8-bit SAR product hierarchy in the TI portfolio. Key specifications include 8-bit resolution, 50-200 ksps sample rate, single 2.7-5.25 V supply, true-differential analog input (VIN+ / VIN-), SPI-compatible serial output, and an INL/DNL of 0.2 LSB / 0.1 LSB (typical). The supply is also used as the reference, simplifying external BOM. Typical power consumption is 1.3 mW at 3.6 V / 200 ksps and drops to <1 µW in shutdown. Operating temperature is -40 °C to +85 °C (industrial grade). The ADC081S021 architecture includes an input track-and-hold, a charge-redistribution DAC, a high-speed comparator, and a SAR control logic block. The SCLK, /CS, and DOUT pins implement a standard 3-wire SPI interface, allowing direct connection to most microcontrollers and DSPs without glue logic. The compact 6-WSON package makes the part especially attractive for space-constrained designs. Typical applications include portable/battery-powered instrumentation, consumer audio front ends, system monitoring and housekeeping ADCs, isolated sensor front ends, and industrial process-control monitoring. The wide 2.7 V to 5.25 V supply range allows direct connection to 3.3 V and 5 V rails. When designing with this ADC, bypass VA with a 0.1 µF ceramic capacitor placed as close as possible to the supply pin, and keep analog input traces short to minimize coupling. Because the supply doubles as the reference, any noise on VA directly converts to noise in the conversion result, so a clean, low-ripple rail is critical. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving procurement and design engineers a one-stop reference for sourcing and using the ADC081S021CISD.
ADC081S021CISDX - 8-Bit 50-200ksps SAR ADC | Texas Instruments
The Texas Instruments ADC081S021CISDX is a low-power, single-channel CMOS 8-bit analog-to-digital converter (ADC) with a high-speed SPI/SSI-compatible serial interface, supplied in a 6-pin WSON package. It supports a sample rate range of 50 ksps to 200 ksps and operates from a single 2.7V to 5.25V supply, drawing only 1.5 mW at 3V and 200 ksps. A successive-approximation register (SAR) ADC is a converter type that approaches the analog input with a binary-weighted DAC, completing each conversion in a fixed number of clock cycles. SAR ADCs are favored for low-latency, deterministic sampling in multiplexed data-acquisition, motor-control, and instrumentation systems. As a member of the wider family of ADCs (SAR -> ADC -> data converter -> mixed-signal IC), the ADC081S021 combines an internal track-and-hold with sub-1 mW operation to fit portable and space-constrained designs. Key features include a single-ended analog input with input range of 0V to VA (the supply), a serial data output with clock rates up to 4 MHz, and -40C to +85C industrial operating range. The 6-lead LLP/WSON package gives the part an extremely small PCB footprint for point-of-load digitization. The device integrates a precision reference input (using VA as the reference for full-scale), an internal oscillator, and a wide supply input. The CMOS process ensures low power dissipation while maintaining 8-bit linearity (max INL of 0.1172%) at the rated throughput. Typical applications include portable instrumentation, handheld meters, position and motor feedback, optical-sensor digitizers, and consumer-audio front-end monitoring. The wide supply range (2.7V to 5.25V) lets one part number work across battery and 5V-rail systems. When designing with this ADC, decouple VA with a 1uF ceramic capacitor placed within 1 cm of the pin, and route the analog input away from the serial clock to avoid digital coupling. The maximum 200 ksps sample rate requires the SCLK to remain above the minimum frequency of 1 MHz to avoid violating the conversion timing. This page combines Verified Web Data from TI, Mouser, DigiKey, and Octopart with hand-curated drop-in alternatives and design notes not found in the manufacturer datasheet, helping engineers select and source the ADC081S021CISDX with full context.
ADC081S051CIMFX/NOPB - 8-Bit 500kSPS SAR ADC, SOT-23-6 | TI
The Texas Instruments ADC081S051CIMFX/NOPB is a low-power, single-channel CMOS 8-bit analog-to-digital converter (ADC) that delivers sample rates from 200 ksps to 500 ksps in a tiny SOT-23-6 (6-pin SOT-23) package. The part uses a successive-approximation-register (SAR) architecture with an internal track-and-hold and supports SPI-, QSPI-, MICROWIRE-, and DSP-compatible serial interfaces, making it a flexible data-conversion building block for space-constrained designs. What is a SAR ADC? A successive-approximation-register ADC is a converter architecture that performs a binary search through an internal DAC to digitize an analog input one bit per clock cycle, balancing speed, accuracy, and power efficiency. SAR ADCs are the workhorse of medium-speed data acquisition (typically 100 kSPS to 1 MSPS) where pipelined ADCs are overkill and delta-sigma is too slow; they sit within the broader hierarchy of ADC -> data converter -> mixed-signal IC -> semiconductor. Key features include a single +2.7V to +5.25V supply rail, 1.6 mW typical power consumption at +3.6V and 8.5 mW at +5.25V, and straight-binary serial output. The wide supply range lets designers share the ADC supply with both 3.3V digital and 5V analog rails, simplifying power-tree design. Per the TI datasheet, the converter is fully specified across 200 ksps to 500 ksps - so unlike many competing 8-bit ADCs that are characterized at only one sample rate, AC and DC performance scales predictably across the full operating window. Typical applications include handheld battery-powered test equipment, sensor signal conditioning front-ends, industrial process monitoring modules, consumer audio level meters, automotive telemetry and infotainment subsystems, and any compact PCB where board area is at a premium. The SOT-23-6 footprint enables placement adjacent to sensors or potentiometers to keep analog traces short, which directly improves SNR by reducing input-capacitance induced errors and ground-loop pickup. When designing in this part, place a 0.1 uF decoupling capacitor as close as possible to the AVDD pin and keep the analog input trace short and guarded, because SAR ADC linearity degrades with clock-feedthrough and reference noise. For multi-rail designs, route the serial clock and DOUT away from switching regulator inductors to minimize substrate-coupled switching noise. The /CS line allows direct connection to many MCUs without external glue logic.
ADC081S051CISD - 8-Bit 500kSPS SAR ADC | Texas Instruments
The Texas Instruments ADC081S051CISD is a low-power, single-channel CMOS 8-bit analog-to-digital converter with a high-speed serial interface, offered in a 6-pin WSON (2.2x2.5 mm) package. It delivers sampling rates of 200 to 500 ksps across a single-ended input channel, with a successive-approximation register (SAR) architecture and SPI/QSPI/MICROWIRE/DSP-compatible serial output. Operating from a single +2.7V to +5.25V supply, it consumes only 1.6 mW at 3.6V and 8.5 mW at 5.25V, drawing just 1.5 mA typical supply current at full speed. A successive-approximation register ADC is a type of data converter that resolves each conversion one bit at a time using a binary-search algorithm against an internal DAC, achieving low latency, deterministic behavior, and inherent anti-aliasing. SAR ADCs sit within the data converter family (ADC > Data Converter > mixed-signal IC > semiconductor) and are favored over delta-sigma converters where designers need a one-conversion latency, no pipeline delay, and direct DC accuracy. The ADC081S051 brings that architecture into a sub-1 mW power class, suitable for battery-powered sensing nodes. Key features of the ADC081S051 include an INL/DNL of ±0.1 LSB (max), a SINAD of 49.7 dB, an SNR of 49.7 dB, and a 2.3 MHz full-power input bandwidth. The device provides an external reference range of 1.0V to VA (with VA itself supporting 2.7V to 5.25V), and integrates an input track-and-hold. The 6-pin WSON package exposes VA, GND, REF, AIN, SCLK, DOUT/DRDY, and CS pins, enabling compact PCB footprints around 2.2 mm x 2.5 mm. The ADC081S051 shares a fully pin-compatible family footprint with the 10-bit ADC101S051 and 12-bit ADC121S051, as well as the slower ADC081S021 (50-200 ksps) and faster ADC081S101 (500 ksps-1 Msps). This lets engineers scale resolution or speed without PCB rework. The serial interface uses straight-binary output data and a chip-select line that synchronizes multiple devices to a shared SPI bus. Typical applications include portable instrumentation, industrial process controls, optical sensors, consumer audio level meters, and battery monitoring. The wide supply range and micropower dissipation also suit remote IoT sensor readouts where standby current dominates. In automotive and industrial environments, designers often run the part from a 5V rail directly, simplifying the analog supply chain. When designing with this ADC, choose an external reference voltage source with low noise and adequate drive strength; the reference input impedance is dynamically switched during conversion, so a low-impedance buffer such as the REF5040 or a 10uF local decoupling is recommended. Route AIN with short, guarded traces away from switching digital lines to preserve INL performance.
ADC081S051CISDX - 8-Bit 500kSPS 1-Ch SAR ADC SPI | Texas Instruments
The Texas Instruments ADC081S051CISDX is a low-power, single-channel 8-bit CMOS analog-to-digital converter (ADC) supporting a sample rate range of 200 kSPS to 500 kSPS, housed in a 6-pin LLP/WSON package (2.2x2.5 mm). The part operates from a 2.7V to 5.25V single supply and features an SPI/QSPI/MICROWIRE-compatible serial interface with an external reference input. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter architecture that uses a binary search algorithm to convert an analog input voltage into a digital code over a fixed number of clock cycles. SAR ADCs are prized for low latency, deterministic behavior, and excellent DC accuracy, and they sit within the broader hierarchy of: ADC -> data converter -> mixed-signal IC -> semiconductor. Compared with delta-sigma ADCs of similar speed, SAR converters deliver lower latency and require no output settling filter. Key features include ±1 LSB (max) INL/DNL, a single-ended analog input, an external VREF pin allowing any reference voltage up to VDD, and a wide analog input range of 0V to VREF. The serial ADC output stream is compatible with SPI, QSPI, and MICROWIRE hosts, eliminating the need for glue logic. The device consumes only 6.4 mW at 3V supply and 500 kSPS, making it suitable for power-constrained designs. The converter uses a charge-redistribution DAC array with a sample-and-hold front-end. Internal clock generation eliminates the need for an external high-frequency clock source. Per the ADC081S051 datasheet (Rev. F), the part is fully specified over the 200-500 kSPS range (not just a single point), providing guaranteed AC and DC performance across the operating envelope. The CMOS process enables low power consumption while maintaining 8-bit linearity across the industrial temperature range. Typical applications include portable battery-powered systems, isolated data acquisition modules, instrumentation and process control, position sensors and bridge transducers, and consumer white goods. The wide 2.7V-5.25V supply range and the small 6-pin LLP footprint make it particularly well-suited for space-constrained, low-power designs that need a single-ended input channel. A primary design consideration is reference stability: ADC accuracy is bounded by the reference voltage noise and drift, so choose a low-noise reference (e.g., a 2.5V or 3.3V reference IC). Also note that input current transients occur during acquisition - add a small RC input filter to settle the input within the acquisition window. This page synthesizes verified distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, providing a faster procurement and BOM-decision workflow for engineers.
ADC081S051CISDX/NOPB - 8-Bit 500kSPS SAR ADC, SPI, 6-WSON | TI
The Texas Instruments ADC081S051CISDX/NOPB is a low-power, single-channel CMOS 8-bit analog-to-digital converter with a high-speed SPI-compatible serial interface, housed in a 6-pin WSON (NGF) package with exposed thermal pad. It delivers sampling rates of 200 ksps to 500 ksps, draws only 1.6 mW at 3.6 V supply, and operates from a single +2.7 V to +5.25 V rail, suiting both 3.3 V and 5 V microcontroller or DSP systems. A Successive Approximation Register (SAR) ADC is a type of data acquisition converter which converts input voltage samples using a binary-search architecture that does not require an integrating or tracking cycle, providing deterministic latency and a single conversion clock. SAR ADCs sit at the lowest level of the data converter hierarchy (SAR ADC -> ADC -> data converter -> signal chain IC -> semiconductor) and are the workhorse of embedded sensing, instrumentation, and control loops where low latency, moderate resolution, and small package size matter more than highest absolute resolution. Key features include a straight-binary output data format compatible with SPI, QSPI, MICROWIRE, and most common DSP serial interfaces, an external SCLK-driven conversion clock, and an internal track-and-hold that eliminates the need for an external sample capacitor. The device typically dissipates 1.6 mW at 3.6 V V_A and 8.5 mW at 5.25 V V_A, with a power-down mode that drops supply current to microamp levels between conversions. The 6-WSON exposed pad gives a low thermal resistance path that supports full -40C to +85C industrial operation. Internally the ADC uses a charge-redistribution DAC array and a comparator driven by an on-chip successive-approximation state machine; the same die is shared across the entire ADC081S051 family. The single-ended analog input is sampled on the rising edge of CS, with the conversion clock derived from SCLK, so timing can be tuned at the host controller without external components. Typical applications include portable instrumentation, optical-module monitoring, system health and battery monitoring, sensor-signal digitization for industrial control loops, and consumer-electronics front ends where a small-footprint 8-bit ADC with a standard SPI port is needed. Pair the part with a low-noise reference and a small RC antialiasing filter at AINP for best AC performance. When designing, note that power dissipation is dominated by V_A and sample rate; derate SCLK and f_S together so f_S never exceeds 500 ksps. Tie unused AINP to mid-supply or ground through a defined DC path so the track-and-hold never floats at an undefined bias between conversions.
ADC081S101CIMF - 8-Bit 1Msps SAR ADC, SOT-23-6 | Texas Instruments
The Texas Instruments ADC081S101CIMF is a low-power, single-channel 8-bit CMOS analog-to-digital converter with a high-speed serial interface, fully specified over a 500 ksps to 1 Msps sampling rate range, housed in a 6-pin SOT-23 package. It operates from a single +2.7 V to +5.25 V supply, draws a typical supply current that scales with throughput, and includes an internal track-and-hold circuit for clean single-shot conversions. The serial output is SPI/QSPI/MICROWIRE/DSP-compatible, making the part easy to drop onto virtually any microcontroller or DSP without glue logic. An SAR (Successive-Approximation Register) ADC is a type of analog-to-digital converter that converts an input voltage to a digital code by binary-searching against a precision DAC. Compared with sigma-delta and pipeline ADCs, SAR ADCs deliver deterministic latency (one conversion per start-of-conversion pulse), low power consumption, and excellent DC linearity, while saturating around 1-10 Msps in modern CMOS processes. SAR is the dominant topology for low-power, sample-on-demand applications such as sensor readouts, motor control feedback loops, and instrumentation front-ends. Key features of the ADC081S101 include 8-bit resolution with no missing codes, an analog input range of 0 V to VDD, a hardware power-down pin that drops quiescent current to a few microamps between bursts, and an industry-standard 6-pin SOT-23 footprint that lets designers shrink the analog front-end to a few square millimeters of board area. According to the TI datasheet, the ADC081S101 shares its pinout and serial protocol with the 10-bit ADC101S101 and 12-bit ADC121S101, allowing seamless scaling of resolution without changing firmware or layout. Typical applications include industrial process control loops, portable battery-powered instrumentation, optical module monitoring, white-goods sensor readouts, and consumer-electronics front-ends. Designers choose this family when they need deterministic SAR latency, sub-3 mW typical operating power, and an ultra-small footprint that fits beside a sensor or inside a sealed housing. When designing with the ADC081S101CIMF, place the bypass capacitor within a few millimeters of the VDD pin and route the analog input over a quiet ground-referenced trace to avoid digital switching noise coupling into the sample window. The SOT-23-6 package is small but tracks well on standard reflow profiles. Industrial temperature grade (-40C to +85C) makes the part suitable for outdoor and automotive cabin applications, though not AEC-Q100 qualified. This page synthesizes distributor pricing, drop-in alternatives drawn from the same TI pin-compatible family, and practical design guidance that complements the manufacturer datasheet.
ADC081S101CISD - 8-Bit 1MSPS ADC, 6-WSON | Texas Instruments
The Texas Instruments ADC081S101CISD is a low-power, single-channel CMOS 8-bit analog-to-digital converter with a high-speed serial interface, offered in a 6-pin WSON (2.2 x 2.5 mm) package. It supports a sample rate range of 500 ksps to 1 Msps and operates from a single supply of +2.7 V to +5.25 V, with normal power consumption of 2.0 mW at 3 V and 10.0 mW at 5 V. An ADC (analog-to-digital converter) is a data-acquisition component that converts continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Successive-approximation register (SAR) ADCs such as the ADC081S101 are valued for their deterministic latency, low power draw, and small footprint, occupying the mid-tier of the converter hierarchy (SAR -> ADC -> data converter -> signal chain IC -> semiconductor). Key features include an internal track-and-hold circuit, straight-binary serial output compatible with SPI, QSPI, MICROWIRE and many common DSP serial interfaces, and an extended industrial temperature range of -40 C to +85 C. The 6-WSON package footprint is one of the smallest available for this speed class. The ADC081S101 is based on a SAR architecture with an internal track-and-hold, which samples the input on the rising edge of CS and completes it deterministically within the conversion cycle. The wide supply range lets the same part interface with both 3.3 V and 5 V microcontrollers without level shifters. Typical applications include portable instrumentation, motor control feedback loops, sensor signal conditioning, optical-module monitoring, and consumer audio level metering. The SOT-23-class footprint also makes it suitable for space-constrained PCB designs. When designing with this device, place a 0.1 uF decoupling capacitor as close as possible to the VDD pin and keep the analog input traces short and guarded. The device is now listed as obsolete on major distributors, so designers should consider active alternatives such as the ADC081S021 or ADC081S051. This page synthesizes distributor stock status, drop-in alternatives in the same 6-WSON footprint, and design considerations not aggregated in any one distributor listing.
ADC0820BCV - 8-Bit 666kSPS Half-Flash ADC w/ T/H | Texas Instruments
The Texas Instruments ADC0820BCV is an 8-bit high-speed microprocessor-compatible analog-to-digital converter with on-chip track-and-hold, packaged in a 20-pin PLCC (J-lead, 9x9 mm) and based on a half-flash conversion architecture. It delivers a maximum conversion time of 1.5 µs (about 666 kSPS), 0V to 5V analog input range on a single 5V supply, and ratiometric operation with any reference up to VCC. Maximum power dissipation is 75 mW, and the device supports cascading through an overflow output for higher-resolution systems. A half-flash (or sub-ranging) ADC is an architecture that splits a full flash converter into two lower-resolution flash blocks (typically 4-bit MSB plus 4-bit LSB) and combines them sequentially to halve the comparator count versus a true flash, while still achieving sub-microsecond conversion times. The ADC0820BCV uses 31 comparators, a 4-bit MSB flash, and a 4-bit LSB flash with internal DAC and track-and-hold. It belongs to the converter -> ADC -> successive-approximation/half-flash ADC -> data-acquisition IC hierarchy. Key features include latched three-state outputs that map directly to a microprocessor data bus, no external zero/full-scale adjustment, an overflow bit (OF) for cascading, and an operating temperature range of 0°C to +70°C (commercial grade). The PLCC-20 footprint supports 0.3" standard-width 20-pin DIP-style PCB layouts via J-lead castellated edges. Typical applications include digital voltmeters, portable instrumentation, process-control front ends, disk-drive read channels, and embedded microprocessor data-acquisition boards where parallel bus speed and simple interface logic are critical. When designing with the ADC0820BCV, treat the analog input as a switched-capacitor node and place a low-impedance buffer ahead of VIN to avoid dynamic errors. Use a clean 5V analog supply with local decoupling (0.1 µF ceramic in parallel with 10 µF tantalum) and route digital ground returns separately from analog grounds to keep digital switching noise out of the converter's reference ladder. This page consolidates pricing tiers, drop-in alternatives, and application-level design notes that go beyond the manufacturer datasheet's parametric tables.
ADC0820BCWM/NOPB - 8-Bit 667kSPS Half-Flash ADC | TI
The Texas Instruments ADC0820BCWM/NOPB is an 8-bit high-speed micro-processor-compatible analog-to-digital converter with an on-chip track-and-hold function, packaged in a 20-pin wide-body SOIC (WM, 7.50 mm). It uses a half-flash (two-step flash) conversion technique to deliver a 1.5 microsecond conversion time while dissipating only 75 mW of power, and supports a maximum sampling rate of 667 ksamples per second. What is a half-flash ADC? A half-flash ADC, also called a two-step or subranging flash converter, is a type of analog-to-digital converter that performs an initial coarse flash conversion followed by a fine flash conversion on the residue. This architecture reduces the number of comparators required compared with a true flash ADC, lowering die area and power consumption while keeping conversion speed close to flash-class performance. The ADC0820 family belongs to the wider hierarchy of Nyquist-rate ADCs -> half-flash ADCs -> successive-approximation-class converters -> data-acquisition analog ICs -> signal-chain semiconductors, and typically finds use wherever an 8-bit micro-processor-compatible ADC is needed. Key features include a single +5V supply operation with a 4.5V to 8V Vcc range, single-ended analog input with track-and-hold, and parallel microprocessor-compatible output data. The converter provides ratiometric conversion, accepts an external reference or supply-referenced operation, and supports both read-during-conversion and read-after-conversion timing modes for flexible processor interfacing. The wide SOIC-20 package simplifies prototyping and wave-solder PCB assembly. The device uses a built-in track-and-hold amplifier that minimizes aperture uncertainty and enables accurate conversions on fast-moving input signals. Operating modes are selected via the MODE pin, allowing single-ended or differential-style conversion control without external sample/hold circuitry. Typical applications include process control data acquisition, digital signal processing front-ends, portable instrumentation, video-digitizer auxiliary ADCs, and PC-based measurement boards that require an 8-bit, micro-processor-friendly ADC with a parallel bus interface. Industrial, scientific, and medical instrumentation that needs 0-70C commercial-grade operation also benefits from this part. When designing with this converter, ensure the analog input source impedance is low enough to settle within the track time, and place a 0.1 microF decoupling capacitor directly on the Vcc pin. For best linearity, drive the analog input from a low-impedance buffer, and avoid switching large digital currents near the analog ground return. This page synthesizes distributor pricing, verified drop-in alternatives, application-grade companion parts, and practical design notes not found in the bare manufacturer datasheet, helping engineers evaluate the ADC0820BCWM/NOPB for both new design and legacy support scenarios.
ADC0820BCWMX - 8-Bit 1.5µs Half-Flash ADC w/ T/H | Texas Instruments
The Texas Instruments ADC0820BCWMX is an 8-bit high-speed microprocessor-compatible analog-to-digital converter with on-chip track-and-hold, sampling at up to 667 kSPS (RD mode) and using a half-flash (two-flash) conversion architecture to deliver 1.5 µs typical conversion time. The device is supplied in a 20-pin SOIC (DW) wide-body package, operates from a single +5 V supply (VCC), and offers both microprocessor-compatible parallel interface modes (RD mode for tying directly to a 8080-style bus, and WR-RDM modes for standalone conversion). Input range is 0 V to +5 V when VREF(+) = +5 V and VREF(−) = GND. A half-flash ADC is a parallel type of analog-to-digital converter that uses two 4-bit flash sub-converter stages rather than a full 256-latch comparator array, dramatically reducing die area, power consumption, and cost versus a true flash converter while still achieving sub-microsecond per-code sampling. Within the broader data-converter hierarchy, the ADC0820 sits at the low-resolution high-speed node: it is a successive-approximation-class part on the throughput axis (faster than most SAR), yet simpler and cheaper than a true flash ADC. It belongs to the power-management-and-conversion family of mixed-signal data-acquisition ICs. The half-flash architecture performs a coarse 4-bit MSB conversion, then a fine 4-bit LSB conversion around the residue, producing a complete 8-bit code in two clock edges. Key features include 0 V to +5 V analog input range, on-chip track/hold eliminating the need for an external sample capacitor, ratiometric reference inputs for ratiometric transducers, and TTL-compatible digital outputs. Power dissipation is approximately 75 mW typical, and the device is specified for 0°C to +70°C (commercial) or −40°C to +85°C (industrial) operation depending on grade. Typical applications include digital-panel meters, process control front ends, microcontroller analog input expansion, video digitizing at low bandwidth, instrumentation, and portable data loggers where high sample rate and low cost matter more than 12-bit precision. The wide SOIC-20 footprint also eases hand-prototyping and breadboard integration compared with smaller DFN/QFN alternatives. When using this device, ensure the analog input driving bandwidth exceeds the ADC's input bandwidth, place a 0.1 µF decoupling capacitor directly at VCC, and route the analog/digital grounds with a star-ground or split-plane layout to avoid digital-noise coupling into the comparator ladder.
ADC0820CC/D - 8-Bit 1.5us Half-Flash ADC Die | Maxim Integrated
The Maxim Integrated ADC0820CC/D is a CMOS 8-bit analog-to-digital converter using a half-flash conversion technique to deliver a 1.5 microsecond conversion time at 75 mW maximum power dissipation, supplied in bare die form. The half-flash architecture uses 31 comparators split between a most-significant 4-bit ADC and a least-significant 4-bit ADC, providing high-speed conversion without the cost of a full flash design. An ADC (analog-to-digital converter) is a data-acquisition component that converts continuous analog voltage signals into discrete digital codes, serving as the bridge between the analog physical world and digital signal processors, microcontrollers, or FPGAs. The half-flash (or sub-ranging) topology is a speed/cost compromise between successive-approximation (SAR) ADCs and full-flash ADCs, achieving sub-2-microsecond conversion at modest die area and low power. ADC ICs are categorized within the broader signal-chain hierarchy: sensor -> analog front end -> ADC -> DSP/MCU -> actuator/logic. Key features of the ADC0820CC/D include an on-chip sample-and-hold (track/hold) front-end that eliminates the need for an external THA in many applications, single +5V supply operation, and a commercial temperature grade of 0C to +70C. The device supports both ratiometric and absolute-voltage conversions, with a typical input range of 0V to +5V when paired with a +5V reference. Its built-in track/hold function allows accurate digitization of fast-changing signals up to the converter's full-scale bandwidth. From a technical-depth perspective, the half-flash architecture first performs a coarse 4-bit conversion, then subtracts the DAC residue and runs a fine 4-bit conversion on the remainder; the two 4-bit results are combined and error-corrected to yield the final 8-bit code. This dual-step method gives the ADC0820 a typical aperture time of 100 ns and a maximum conversion time of approximately 1.5 us, while limiting comparator count to 31 - far fewer than the 255 comparators required by a true single-step flash converter. Typical applications include digital instrumentation, video digitizing, ultrasonic signal processing, high-speed data logging, and process-control front ends. The track/hold input also makes it suitable for multiplexing multiple channels into a single ADC at high switching rates without losing accuracy due to aperture jitter. When designing with this part, treat the bare die as an ESD-sensitive component and use matched-impedance bond-wire layouts to preserve the 1.5 us timing budget. Decoupling the +5V supply with a 0.1 uF ceramic capacitor placed within 5 mm of each bond pad is recommended to keep digital ground bounce out of the analog sample-and-hold path. This page combines Maxim Integrated datasheet values with distributor pricing and drop-in same-family alternatives to give design engineers a one-stop reference not found in any single source.
ADC0820CCN/PB - 8-Bit 667kSPS Flash ADC w/ Track-Hold | TI
The Texas Instruments ADC0820CCN/PB is an 8-bit, high-speed, microprocessor-compatible analog-to-digital converter (ADC) with an integrated track-and-hold function, packaged in a 20-pin PDIP through-hole package. It supports a single analog input channel and delivers up to 667 kSPS conversion rate using a semi-flash architecture, achieving a maximum conversion time of 2.5 us. The device operates from a single 4.5V to 8V supply with a 5V typical operating point. An analog-to-digital converter (ADC) is a data-acquisition integrated circuit that converts real-world continuous analog voltages into discrete digital codes that a microcontroller, microprocessor, or DSP can process. The 8-bit ADC0820 falls in the "moderate-resolution, high-speed" tier of the data-converter taxonomy: ADC -> successive-approximation / flash ADC -> data converter -> data-acquisition IC -> signal conditioning -> mixed-signal semiconductor. Semi-flash (or half-flash) converters like the ADC0820 use two parallel low-resolution flash stages to halve the number of comparators versus a true flash design while delivering comparable speed. Key features include parallel CMOS-compatible output, an input range of 0V to 5V, a built-in sample-and-hold that allows full throughput on rapidly changing signals, and ratiometric operation when the reference is tied to the supply. The track-and-hold function ensures accurate conversion of fast analog transients without an external SHA, simplifying front-end design. The semi-flash (two-step) architecture performs a coarse 4-bit conversion followed by a fine 4-bit conversion, generating the final 8-bit result in roughly 1.5 clock cycles. This topology yields low input capacitance and modest power consumption compared with true flash converters while avoiding the long acquisition times of successive-approximation ADCs. Typical applications include digital voltmeters, panel meters and bench instrumentation, process-control analog front-ends, video digitizing at sub-Nyquist rates, disk-drive servo control loops, and µP-based data-logging boards. The DIP-20 footprint and parallel interface suit legacy 8-bit microcontrollers and replacement of obsolete ADC0820 sockets without board rework. When designing with this part, place a 100 nF decoupling capacitor directly between V+ and GND as close to the pins as possible, and keep analog and digital grounds on a single low-impedance plane tied at one point. The reference input may be driven from a 2.5V precision reference or from the 5V supply for ratiometric conversions using bridge or resistive sensors. This page synthesizes current distributor availability, drop-in alternatives in the DIP-20 footprint, and practical PCB design notes for the ADC0820 family that are not found in the manufacturer datasheet.
ADC082S021CIMM - 8-Bit 200ksps 2-Ch SAR ADC | Texas Instruments
The Texas Instruments ADC082S021CIMM is a low-power, two-channel CMOS 8-bit analog-to-digital converter (ADC) with a high-speed serial interface, housed in an 8-VSSOP (DGK) package. It supports a sample rate range of 50 ksps to 200 ksps, operates from a single +2.7V to +5.25V supply, and consumes only 1.6 mW at 3V or 5.8 mW at 5V, making it well suited for battery-powered and space-constrained designs. The converter uses a successive-approximation register (SAR) architecture with an internal track-and-hold and delivers straight-binary output compatible with SPI, QSPI, MICROWIRE, and many DSP serial interfaces. The ADC082S021CIMM (without the NOPB suffix) is now listed as obsolete by DigiKey; the /NOPB lead-free variant with the same die and footprint is recommended for new designs. An SAR ADC is a type of analog-to-digital converter that uses a successive-approximation register to perform binary search on the input voltage. SAR ADCs are valued for their low power, deterministic latency, and excellent dynamic performance at moderate resolutions. The ADC082S021 belongs to the broader hierarchy of data converter ICs (ADC/DAC) within the signal-chain semiconductor category, and as an 8-bit device it targets applications that do not require high resolution but do need low latency and small size. Key features include an analog input bandwidth suitable for the 50–200 ksps range, a hardware-/SPI-compatible serial data output, an external SCLK input from 0.8 MHz to 3.2 MHz, and an industrial operating temperature range of -40°C to +85°C. The 8-pin VSSOP (DGK) package exposes one chip-select input and two analog input channels, plus the serial data output, SCLK, and supply pins. The simple digital interface requires only three digital lines (CS, SCLK, DOUT), which simplifies PCB routing in microcontroller- or DSP-based systems. Typical applications include portable instrumentation, sensor signal acquisition, battery monitoring, consumer audio level meters, industrial process controls, and handheld meters. The wide 2.7V–5.25V supply range allows direct connection to 3.3V or 5V microcontrollers without level shifters. Because the SAR architecture has no pipeline delay, the part is also well-suited to closed-loop control loops where deterministic conversion latency matters. When designing with this ADC, observe the analog input settling requirements and the source-impedance-driven acquisition time; use a low-impedance input buffer when the source impedance exceeds the datasheet limit. Decouple VA and VD with 0.1 µF and 10 µF capacitors placed as close as possible to the supply pins to keep digital switching currents out of the analog input path. This page synthesizes the manufacturer datasheet parameters with distributor pricing, drop-in alternatives (including the active /NOPB and -X tape-and-reel variants), and practical design notes that are not collected in a single datasheet table.
ADC082S101CIMM - 8-Bit 1Msps 2-Ch SAR ADC | 8-MSOP
The Texas Instruments ADC082S101CIMM is an 8-bit, 2-channel successive-approximation register (SAR) analog-to-digital converter that supports sample rates from 500 ksps to 1 Msps, housed in an 8-pin VSSOP (DGK) package. It operates from a single +2.7V to +5.25V supply, draws a low 1.6 mA typical supply current at 3V, and provides straight-binary serial output compatible with SPI, QSPI, MICROWIRE, and many DSP serial interfaces. Per the manufacturer datasheet, the converter delivers ±0.2 LSB typical INL and ±0.2 LSB typical DNL with no missing codes over the industrial -40°C to +85°C range, and integrates an on-chip track-and-hold with two single-ended analog inputs (IN1, IN2). An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a precision data-acquisition building block that converts an analog input into a digital code one bit at a time using a comparator and a binary-weighted DAC. It belongs to the medium-speed, medium-resolution converter hierarchy, sitting between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, slowest). SAR ADCs are widely used in industrial control, sensor signal conditioning, and embedded data acquisition because they combine deterministic latency, low latency-to-sample, low power dissipation, and small package size. The ADC082S101CIMM further targets cost-sensitive multi-channel systems by integrating a 2-input mux. Key features include 1 Msps maximum throughput (fSCLK = 8-16 MHz), 2 single-ended analog inputs with an internal analog mux, an external SCLK-driven serial frame, an active-low CONV/TRAIL signaling convention, and a power-down mode that drops quiescent current to under 1 µA between conversions. The VSSOP-8 footprint makes it one of the smallest 2-channel SAR ADC options on the market, ideal for space-constrained portable instrumentation. The architecture is a charge-redistribution SAR with a sample-and-hold front-end and a high-speed serial readout engine. The wide 2.7V-5.25V supply range lets the ADC082S101CIMM directly digitize 0-5V transducer signals powered from the same +5V system rail used by logic-class host MCUs, eliminating the need for level shifters. Typical applications include portable battery-powered instrumentation, industrial process-control sensor digitizers, motor-speed and position feedback loops, handheld multimeter front-ends, optical-sensor signal chains, and consumer-electronics audio/sensor front-ends. The low quiescent current extends battery life in portable systems while the 1 Msps rate handles most closed-loop control needs. When designing with this device, ensure the analog input drive amplifier is fast enough to settle within the acquisition window (typically 200 ns) - a low-output-impedance op-amp such as the OPA2350 is recommended. Add 0.1 µF and 10 µF decoupling capacitors close to VA and GND pins to keep SAR reference noise out of the conversion result.
ADC082S101CIMMX - 2-Ch 8-Bit 1MSPS SAR ADC | Texas Instruments
The Texas Instruments ADC082S101CIMMX is a 2-channel, 8-bit, 500 ksps to 1 MSPS successive-approximation-register (SAR) analog-to-digital converter housed in an 8-pin VSSOP (DGK) package. It operates from a single +2.7 V to +5.25 V supply, consuming 3.2 mW at 3 V and 9.6 mW at 5 V, and provides straight-binary serial output compatible with SPI, QSPI, MICROWIRE, and many DSP serial ports. An ADC (analog-to-digital converter) is a mixed-signal data-acquisition IC that samples a continuous-time analog voltage and converts it into a discrete digital code. Within the broader semiconductor taxonomy, ADC082S101 belongs to the SAR converter family (instantaneous sampling, no pipeline latency), which is a sub-class of data converters under signal-chain / data-acquisition ICs, itself part of the power management and analog signal-chain hierarchy. SAR ADCs are preferred where deterministic latency, simple serial interfacing, and low power are required. Key features include two single-ended input channels multiplexed into a single SAR core, throughput scalable from 500 ksps to 1 MSPS via an external SCLK between 8 MHz and 16 MHz, an input span of 0 V to VA, and an industrial -40 °C to +85 °C temperature grade. The VSSOP-8 footprint with 0.65 mm pitch suits compact, surface-mount designs. The device uses a charge-redistribution SAR architecture with an on-chip sample-and-hold and an internal reference equal to VA. The serial interface is a 4-wire SPI/QSPI/MICROWIRE-compatible port (CS, SCLK, DOUT, +VA/GND), with data clocked out on falling SCLK edges. Because VA doubles as the reference, no external reference component is needed, but rail noise directly couples into conversion accuracy. Typical applications include portable instrumentation, battery-powered sensor front ends, industrial process-control monitoring points, and consumer-system signal conditioning where a low-channel-count, deterministic-latency converter is sufficient. When designing with this device, place a 0.1 µF decoupling capacitor close to the VA pin and keep analog input traces short. Because VA is the reference, any noise or ripple on the supply rail will appear as conversion error; an LDO or RC filter on VA is recommended in noisy environments. The "M" trailing the part number denotes tape-and-reel packaging. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an engineering-oriented decision resource.