ADC/DAC
제품 (2364)
TLC3544IPWR - 14-Bit 200kSPS 4-Ch SAR ADC | Texas Instruments
The Texas Instruments TLC3544IPWR is a 14-bit, 200 kSPS, 4-channel successive-approximation analog-to-digital converter (SAR ADC) with single-ended/pseudo-differential unipolar inputs, housed in a 20-pin TSSOP (PW) package. The device operates from a single 5 V analog supply and a separate 3 V to 5 V digital supply, supports an analog input range of 0 V to AVdd (or 0 V to Vref when an external reference is used), and provides a serial (SPI/QSPI/MICROWIRE-compatible) interface for compact, low-pin-count designs. The -I suffix denotes the industrial -40C to +85C operating range. What is a SAR ADC? A successive-approximation analog-to-digital converter is a class of Nyquist-rate ADC that uses a binary-search algorithm and an internal capacitive DAC to digitize an analog input in N clock cycles for N-bit resolution. SAR ADCs sit within the broader hierarchy of analog-to-digital conversion (ADC) -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor, and they are preferred for medium-speed, medium-resolution applications where low power, deterministic latency, and small package footprint are critical. Key features include 200 kSPS maximum throughput, ±1 LSB INL (max) and ±1 LSB DNL (no missing codes), an SPI-compatible serial interface, hardware/serial shutdown (max 10 uA), a programmable MSB/LSB-first data format, and a hardware reset pin. A 2.5 V internal reference (10 ppm/C typical drift) is included, eliminating an external reference in many designs and reducing BOM cost. The pseudo-differential input topology simplifies PCB routing while preserving good common-mode rejection. Internally, the TLC3544IPWR combines a charge-redistribution capacitive DAC, a high-bandwidth comparator, and a successive-approximation register with on-chip clock generation. The 4 analog input channels are multiplexed into a single ADC core, and the digital serial interface isolates the analog section from bus noise. The architecture trades off absolute speed (200 kSPS) for exceptional linearity, low power (typically 30 mW at 5 V), and predictable latency that is deterministic on a per-conversion basis. Typical applications include multi-channel data acquisition systems, industrial process control, portable instrumentation, motor control feedback loops, optical sensor signal chains, and medical monitoring front-ends. The pseudo-differential 0-5 V input range matches most industrial transducer outputs (load cells, strain gauges, temperature bridges). When designing with this ADC, place 0.1 uF and 10 uF decoupling capacitors as close as possible to AVdd and DVdd pins, and use a ground plane with the analog and digital grounds joined at a single point under the IC. The REF+ pin must be bypassed with at least 10 uF (tantalum) in parallel with 0.1 uF (ceramic) to limit reference noise-induced conversion errors. The serial SCLK frequency must not exceed the device maximum at the chosen CS setup time. This page synthesizes distributor pricing, same-package (TSSOP-20) drop-in alternatives from the TI TLC3544 family, and practical reference-design notes not found in the manufacturer datasheet alone, giving engineers a single decision-grade resource for sourcing and design-in of this 14-bit SAR ADC.
TLC3544IPWRG4 - 14-bit 200kSPS 4-Ch Serial ADC | Texas Instruments
The Texas Instruments TLC3544IPWRG4 is a 14-bit, 200-kSPS, 4-channel, single-supply serial analog-to-digital converter (SAR ADC) with pseudodifferential 0-5 V inputs, housed in a 20-pin TSSOP (PW) package. The G4 suffix designates a tape-and-reel packaging variant of the industrial-grade TLC3544IPW. It belongs to TI's TLC3544/TLC3548 family of low-power CMOS ADCs optimized for data acquisition systems requiring simultaneous high throughput and serial interface simplicity. An SAR (Successive Approximation Register) ADC is a precision data converter that performs a binary search through internal capacitor arrays to resolve an analog input to N bits in a single conversion cycle. SAR ADCs are widely favored for their deterministic latency, lack of pipeline delay, and excellent DC accuracy at moderate speeds, making them a standard choice for multiplexed-channel data acquisition, industrial process control, and instrumentation front-ends. The TLC3544 sits within the data converter hierarchy as: SAR ADC -> ADC -> data converter -> signal chain IC -> semiconductor. Key differentiating features include 14-bit resolution with no missing codes, four analog input channels multiplexed through an internal analog MUX, 200-kSPS maximum throughput, pseudodifferential input configuration spanning 0 V to the reference voltage, and a 5-V analog/3- to 5-V digital split supply architecture that simplifies mixed-signal PCB partitioning. The serial interface is a SPI/QSPI/MICROWIRE-compatible four-wire port that minimizes pin count and board routing in dense designs. The TLC3544 architecture combines a low-noise input sample-and-hold, a high-accuracy DAC for the SAR conversion loop, and a precision internal reference chain that scales with VREF. The device achieves strong AC performance with excellent differential non-linearity and low integral non-linearity for a 14-bit part, while typical power dissipation remains below the threshold for forced-air cooling in most embedded systems. Typical applications include multi-channel industrial data acquisition modules, factory automation sensor interfaces, portable or battery-powered measurement equipment, optical module monitoring, and process control I/O cards. The 4-channel input count matches common transducer clusters (e.g., four thermocouples, four strain gauges, four 4-20 mA loops) with a single ADC chip. Designers should plan decoupling on both AVDD and DVDD with 0.1 µF ceramic capacitors placed within 5 mm of the supply pins, keep analog and digital ground returns separated back at a single star point, and use a low-noise, low-drift external reference (e.g., REF3025 or REF5050) when system DC accuracy requires more than the internal reference can deliver. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TLC3545IDGKR - 14-Bit 200kSPS SAR ADC, Serial Out | Texas Instruments
The Texas Instruments TLC3545IDGKR is a 14-bit, 200-kSPS successive-approximation analog-to-digital converter (SAR ADC) with a serial SPI/QSPI/Microwire-compatible interface, a single pseudo-differential input channel, and an integrated auto-power-down mode, housed in an 8-pin MSOP PowerPAD (DGK) package. An SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that resolves a binary output one bit per clock cycle using a binary-weighted capacitor array and a comparator. SAR ADCs sit within the broader hierarchy: ADC -> data converter -> signal chain IC -> semiconductor. Compared to delta-sigma converters, SAR ADCs offer deterministic throughput and zero pipeline latency, which makes them well-suited to multiplexed acquisition, motor control loops, and any application where the sample timing must be tightly bounded. The TLC3545 samples at 200 kSPS from a single 5-V analog supply, draws only 5.8 mW at full speed, and drops to 10 uA in auto-power-down between conversions. The 8-pin MSOP PowerPAD package provides a low thermal-resistance path (theta_JA roughly 80 C/W with the pad soldered) so the converter can be placed next to digital logic without local heating concerns. Typical applications include industrial process-control front ends, optical encoder read-out boards, portable data loggers, and the analog input stage of DSP-based motor drives. Because the device is pin-compatible with the TLC3541 (12-bit) and other members of the TLC354x family, designers can swap resolution without re-laying-out the PCB. When designing with this part, place a 0.1 uF ceramic bypass capacitor within 5 mm of the AVDD pin and use the PowerPAD as the primary ground return for the analog input traces. The auto-power-down feature is enabled by tying CS high between conversions - this is the easiest way to drop average supply current in battery-powered systems. This page synthesizes distributor pricing, drop-in pin-compatible alternatives (TLC3545IDGKG4, TLC3545ID, TLC3545IDGK), and practical layout notes not found in the manufacturer datasheet front matter.
TLC4541IDRG4 - 16-bit 200kSPS Serial ADC, Auto PWDN, 8-SOIC
The Texas Instruments TLC4541IDRG4 is a 16-bit, 200-kSPS successive-approximation-register (SAR) analog-to-digital converter (ADC) with a serial (SPI/DSP-compatible) output and an automatic power-down feature, housed in an 8-pin SOIC package (8-SOIC, 0.154 inch / 3.90 mm body width). A SAR ADC is a type of data-acquisition converter that uses a switched-capacitor binary-weighted DAC and a comparator to perform bit-by-bit conversion in N clock cycles for N bits of resolution. SAR ADCs combine low-latency single-shot acquisition, deterministic latency, and excellent DC accuracy, and they occupy a position in the data-converter hierarchy above flash and integrating ADCs but below pipelined and delta-sigma converters for very-high-speed or very-high-resolution tasks. Key features of the TLC4541IDRG4 include 16-bit resolution with no missing codes, 200-kSPS throughput, single +5V analog supply, a single-ended analog input channel with pseudo-differential sampling, and a synchronous serial interface that connects directly to DSPs, microcontrollers, and SPI peripherals. The device also provides hardware-controllable auto power-down between conversions that reduces supply current to microamp levels and an industrial-grade temperature range of -40C to +85C. Internally, the TLC4541 uses a charge-distribution CDAC, an on-chip clock generator, and a precision comparator to perform conversions. The on-chip digital interface includes a 16-bit shift register that delivers MSB-first data with an external serial clock, eliminating the need for an external high-frequency clock. An external reference voltage of typically 4.096 V (or any value up to AVDD) sets the input full-scale range. Typical applications for the TLC4541IDRG4 include industrial process-control front ends, isolated 4 mA to 20 mA loop digitizers, multi-channel data-acquisition systems where multiple ADCs share a SPI bus, handheld instrumentation and battery-powered meters that benefit from the auto power-down, and digital signal processor (DSP) sensor interfaces. When designing with this ADC, place the 10 uF bulk and 0.1 uF decoupling capacitors as close as possible to AVDD and DVDD pins, keep the analog input traces short and guarded, and use an external low-noise reference such as the REF5040 or REF3120 to obtain full 16-bit performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TLC4545IDGKR - 16-Bit 200kSPS Serial ADC | Texas Instruments
The Texas Instruments TLC4545IDGKR is a 16-bit, 200 kSPS, low-power, single-channel successive-approximation-register (SAR) analog-to-digital converter (ADC) with a pseudo-differential analog input and a serial (SPI-compatible) digital interface, housed in an 8-pin VSSOP (DGK) package on tape-and-reel. The device operates from a single 5 V analog supply, draws only 2.94 mW of typical power at 200 kSPS, and features an automatic power-down mode that reduces supply current to 1 uA between conversions, making it well suited for battery-powered and portable data-acquisition front ends. An SAR ADC is a precision data converter that performs a binary-search conversion cycle against a capacitive reference network. Within the broader component taxonomy, an SAR ADC sits under ADC -> data converter -> mixed-signal IC -> semiconductor. Compared with delta-sigma ADCs, SAR converters offer deterministic latency and excellent DC accuracy without the digital filtering delays, which makes them a preferred choice for multiplexed multi-channel systems, control loops, and instrumentation that demand both speed and step-response integrity. Key specifications of the TLC4545IDGKR include 200 kSPS maximum throughput, a 16-bit no-missing-code resolution, a 2.94 us typical conversion time, 1 LSB integral nonlinearityty (INL) maximum, and a SINAD figure that supports industrial measurement precision. The pseudo-differential input architecture accepts unipolar 0-5 V signals while rejecting common-mode noise on the ground return, and the 3-wire serial interface (CS, SCLK, SDO) glues directly to most DSPs, microcontrollers, and FPGAs without external glue logic. The internal architecture combines a track-and-hold front end with an internal 5 V reference option and a precision SAR core, all trimmed at the factory to specified linearity limits. An auto-power-down state machine gates the analog bias currents between active conversion cycles, controlled transparently by the serial chip-select input, so the host MCU can throttle the conversion rate without changing firmware overhead. Typical applications for the TLC4545IDGKR include portable industrial data loggers, sensor signal conditioning stages, multi-channel thermocouple or strain-gauge front ends, battery chargers, optical encoder interfaces, and remote instrumentation that interfaces directly to 5 V-tolerant microcontrollers. Its 16-bit resolution, low power dissipation, and tiny VSSOP-8 footprint also suit dense PCB designs such as point-of-care medical monitors and smart sensor modules. When designing with this part, place the analog and digital grounds on a split ground plane joined at a single point beneath the IC, decouple AVDD with a 10 uF bulk plus 0.1 uF ceramic capacitor within 5 mm of the pin, and keep the serial-interface traces short and impedance-controlled. The auto-power-down feature can be disabled by holding CS low between conversions if the application requires maximum sample-rate throughput. This page synthesizes distributor pricing, drop-in cross-reference alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for selection, sourcing, and bring-up.
TLC4545IDGKRG4 - 16-bit 200kSPS Serial ADC | Texas Instruments
The Texas Instruments TLC4545IDGKRG4 is a 16-bit, 200-kSPS, low-power, single-channel successive-approximation analog-to-digital converter (ADC) with a serial (SPI/QSPI/Microwire-compatible) interface and automatic power-down, housed in an 8-pin MSOP (DGK) package. Operating from a single 5 V analog supply, the part combines a pseudo-differential analog input, an internal sample-and-hold, and an auto-power-down mode that drops quiescent current after each conversion to support battery-powered and duty-cycled data-acquisition designs. The suffix IDGKRG4 decodes as: I = industrial temperature grade (-40 to +85 °C), DGK = MSOP-8 package, R = large-reel (Tape & Reel), G4 = Pb-free / green (RoHS-compliant) finish. A successive-approximation register (SAR) ADC is a sampling converter that resolves a single bit per clock cycle by comparing the sampled input against an internal binary-weighted DAC, achieving low latency (one conversion cycle), deterministic throughput, and inherent anti-alias robustness when paired with an external input RC. SAR ADCs sit between slow-precision integrating converters (e.g., 24-bit sigma-delta) and fast flash converters, occupying the dominant position in multiplexed data-acquisition, motor control, and industrial instrumentation where 12-to-18 bit resolution is needed at sample rates from 1 kSPS to 1 MSPS. Key features include 200 kSPS throughput with a 2.94 µs maximum conversion time, ±1 LSB DNL (no missing codes), a serial data output (SDO) with chip-select (CS) and serial clock (SCLK), automatic power-down between conversions, and an internal 5 MHz serial clock requirement. The pseudo-differential input structure allows the converter to reject small common-mode ground noise between the analog source and the ADC ground, and the internal reference is ratiometric to VREF, simplifying system design. The architecture combines a charge-redistribution capacitive DAC with a low-noise comparator and on-chip clock generator, achieving true 16-bit performance with no missing codes at 200 kSPS. The auto-power-down state reduces current between conversions, extending battery life in portable instruments. The serial interface minimizes host-side pin count and is directly compatible with most microcontrollers and DSP serial ports without glue logic. Typical applications include portable data loggers, industrial process-control analog input modules, weigh-scale front ends, sensor signal conditioning, optical sensor read-out, motor control feedback, and general-purpose precision instrumentation. The pseudo-differential input also makes the device well-suited to thermocouple and bridge-sensor front ends when paired with an external instrumentation amplifier. When designing with the TLC4545, keep the analog input traces short, place the input bypass capacitor (typically 10 µF tantalum + 0.1 µF ceramic) close to the analog supply pin, and provide a clean reference to VREF for ratiometric measurements. Note that the suffix "G4" indicates Pb-free reel packaging only - the silicon and electrical performance are identical to the standard TLC4545IDGKR variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TLC540IDWR - 8-Bit 75kSPS SAR ADC, 11-Input MUX, 20-SOIC | TI
The Texas Instruments TLC540IDWR is an 8-bit, 75 kSPS successive-approximation analog-to-digital converter with an integrated 12-channel (11 external + 1 self-test) analog multiplexer and a synchronous serial interface, housed in a 20-pin SOIC (DW) package. The serial output drives up to four control inputs including an independent system clock, and an on-chip analog MUX supports up to eleven single-ended analog inputs. Built-in self-test mode, software-controllable power down, and a -40C to +85C industrial temperature range make the part well suited to data-acquisition front ends on microprocessors or DSP peripherals. A Successive-Approximation Register (SAR) ADC is a converter architecture that performs a binary search on the input voltage through an internal DAC, yielding one conversion in N clock cycles for an N-bit result. SAR converters are valued for deterministic latency and absence of pipeline delay, which lets the same architecture scale from 8 to 18 bits without architectural changes. Within the broader taxonomy this part sits under data converters > ADC > SAR ADC > single-channel SAR with integrated MUX, a category dominated by TI's TLC540/TLC541/TLC1541 family and pin-compatible follow-ons. Key differentiating features include 8-bit resolution with 75 kSPS maximum sample rate, an input MUX that expands a single ADC into eleven analog channels, low conversion time (~17 us typical), software-controlled power down (typically 4 mW active vs sub-mW in shutdown), and a serial interface compatible with TMS320 DSPs and most microcontrollers. A self-test mode exercises the analog path against an internal reference voltage, an unusual feature at this resolution/price point that simplifies production-time board test. The TLC540/541 family uses a switched-capacitor charge-redistribution DAC at the core of the SAR loop, with a precision analog MUX feeding a single high-impedance input. The serial interface uses chip-select, I/O clock, and data-out lines with the option of synchronous or asynchronous operation. Single +5V supply operation removes the need for negative rails, simplifying analog front-end design in 5V-only industrial systems. Typical applications include multi-channel sensor monitoring in industrial process control, scanned battery-cell voltage measurement in multi-cell battery management, keypad and panel-meter scanning in low-cost human-interface designs, and portable instrumentation where the on-chip MUX reduces BOM against a discrete MUX + ADC pair. When designing with the TLC540IDWR, allocate at least four I/O clock cycles per sample and ensure CS/FS (chip-select / frame-sync) timing matches the host DSP. A 0.1 uF decoupling capacitor must be placed within 5 mm of the VCC pin; analog and digital grounds should be tied at a single star point under the device to limit digital-coupling noise on the multiplexer. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with values verified against TI's TLC540 datasheet and current DigiKey/Mouser stock as of 2026-10-15.
TLC541INSG4 - 8-Bit 40kSPS 11-Ch Serial ADC | Texas Instruments
The Texas Instruments TLC541INSG4 is an 8-bit, 40 kSPS successive-approximation analog-to-digital converter (ADC) with 11 analog input channels and a serial (SPI/QSPI/MICROWIRE-compatible) data interface, housed in a 20-pin SOIC (NS) package. It operates from a single 5 V analog supply with a digital supply range of 4.5 V to 5.5 V, supports an input analog range of 0 V to 5 V, and is rated for industrial temperature operation from -40 °C to +85 °C. The on-chip 12-channel analog multiplexer allows direct connection of up to 11 external sensors plus one internal self-test channel. What is an ADC? An analog-to-digital converter (ADC) is a semiconductor device that transforms continuous analog voltage signals into discrete digital codes, enabling microcontrollers, microprocessors, and DSPs to process real-world signals. Successive-approximation (SAR) ADCs use an internal DAC and comparator to converge on the input voltage bit-by-bit in a fixed number of clock cycles, providing deterministic latency and excellent DC accuracy. The TLC541 belongs to the SAR ADC product family within the broader data-converter (ADC/DAC) category of signal-chain integrated circuits. Key features include 40 kSPS maximum sampling rate, ±0.5 LSB integral linearity error (0.1953 % typical linearity error), 17 µs conversion time, on-chip sample-and-hold, software-configurable analog channel selection, and a hardware reset input. The serial interface reduces pin count versus parallel-output ADCs and simplifies isolation in industrial designs. Built-in self-test mode verifies internal reference integrity without external instrumentation, supporting safety-critical calibration routines. The TLC541 uses a switched-capacitor charge-redistribution SAR architecture with an internal reference and sample-and-hold amplifier. Its CMOS implementation yields low analog-input leakage (typically <1 µA) and low digital-interface power draw, allowing direct connection to 5 V microcontrollers such as the TI MSP430 and classic 8051 family. The 20-pin SOIC footprint simplifies PCB layout on standard 0.1" grid prototyping boards. Typical applications include multi-channel data acquisition front-ends in industrial process control, portable instrumentation with battery monitoring, factory-automation sensor multiplexing, HVAC multi-zone temperature and pressure monitoring, automotive body-controller analog sensing, and medical-grade low-speed signal digitisation where 8-bit resolution is acceptable. When designing with this device, decouple the analog and digital supplies with separate 0.1 µF ceramic bypass capacitors placed as close as possible to the AVDD and DVDD pins. Use short, guarded analog traces to minimise crosstalk between channels, and add an external RC filter on each analog input when driving from high-impedance sources. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TLC542CDWG4 - 8-Bit 25kSPS Serial 11-Input SAR ADC | Texas Instruments
The Texas Instruments TLC542CDWG4 is an 8-bit, successive-approximation analog-to-digital converter with 11 analog input channels and a serial interface, housed in a 20-pin SOIC (DW) package with gull-wing leads. It supports a sampling rate of 25 kSPS, operates from a single 5V analog supply (with a separate digital supply option), and targets 0C to 70C commercial temperature environments. The converter is built around a switched-capacitor SAR core with on-chip 12-channel analog multiplexer (11 external inputs plus one for self-test), making it suited for microprocessor-peripheral or stand-alone ADC operation. An SAR ADC is a successive-approximation-register analog-to-digital converter that performs a binary search through internal capacitor-DAC weighting to settle one bit per clock cycle, achieving 8 bits of resolution in 8 conversion cycles. Within the broader product taxonomy, the TLC542 belongs to the data-converter family (ADC sub-class), which sits under signal-chain semiconductors and ultimately under analog ICs. Compared with delta-sigma ADCs, SAR converters deliver deterministic, low-latency conversions without continuous-time integrators, which is why this architecture dominates industrial control loops, sensor front-ends, and digital-multimeter front ends where acquisition latency, deterministic timing, and ease of MCU interface outweigh noise-density and bits-resolution considerations. Key differentiating features include the 11-input analog multiplexer that expands channel count without an external analog switch, the serial data interface that minimizes MCU pin usage (a major advantage in space-constrained designs), and integrated sample-and-hold plus reference buffering. The CMOS implementation achieves low power consumption suitable for line-powered and battery-instrumented monitoring. The 20-pin SOIC (DW) package provides a 7.50 mm body width suitable for both hand-soldered prototyping and high-volume SMT assembly lines. Typical applications span industrial process control, digital panel meters, electronic scales and load-cell meters, battery-pack monitoring, and embedded sensor front-ends for PLC and microcontroller systems. Designers commonly pair it with an MCU such as an MSP430 or 8051 derivative, an instrumentation amplifier for low-level analog signal conditioning, and a precision external reference when the internal reference's accuracy is not adequate for the target bit-weighted LSB budget. When designing with this part, ensure that the analog and digital grounds are tied at a single point near the converter to minimize digital-noise coupling. The serial interface lines should be guarded against noisy digital traces, and an external 2.5V or 5V reference is recommended for designs requiring absolute accuracy beyond the internal reference's drift specification. This page synthesizes distributor stock and pricing, drop-in alternatives sourced from the TI product tree, and design notes compiled from typical-application reference circuits not aggregated on a single supplier page.
TLC542IFNRG3 - 8-Bit 25kSPS 11-Ch SAR ADC | Texas Instruments
The Texas Instruments TLC542IFNRG3 is an 8-bit, 25 kSPS successive-approximation analog-to-digital converter (SAR ADC) with an on-chip 11-channel analog multiplexer and serial interface, housed in a 20-pin PLCC (J-lead) package rated for the -40C to +85C industrial temperature range. Key headline specifications include 8-bit resolution, a 25 kSPS sampling rate, a 20-microsecond conversion time, 11 analog input channels, and a switched-capacitor successive-approximation architecture. The serial output uses a 3-state interface that connects directly to a microprocessor or DSP through three inputs: I/O CLOCK, CS (chip select) and ADDRESS (with serial data output on the I/O CLOCK line). An SAR ADC is a type of data converter that uses a binary-search algorithm against an internal DAC to resolve each input voltage into a digital code in N clock cycles (where N is the resolution in bits). SAR ADCs typically outperform integrating or delta-sigma converters on speed and latency, at the cost of resolution, and are widely used in embedded data acquisition, motor control, sensor read-out, and instrumentation front-ends. Within the converter hierarchy, SAR sits between fast flash ADCs (low resolution, very high speed) and delta-sigma ADCs (high resolution, lower speed), making 8-bit 25 kSPS parts a sweet spot for cost-sensitive multi-channel monitoring. The TLC542IFNRG3 is built on a CMOS switched-capacitor process that integrates the sample-and-hold into the SAR core, eliminating external track/hold circuitry. Built-in features include software-configurable analog input multiplexer addressing, a sample-and-hold, internal reference, and a serial I/O port that simplifies PCB layout by replacing wide parallel data buses with a single serial link. Typical applications include multiple sensor monitoring, process control front-ends, battery-cell voltage monitoring, isolated data acquisition modules, portable instrumentation, and consumer electronics such as appliance control boards where a small MCU needs to read several analog points without consuming many GPIO pins. When designing with this part, note that the input multiplexer allows one of 11 channels to be addressed through a single serial write, and the previous conversion result is read on the same clock edge - this time-multiplexed protocol keeps host pin count low. Decouple VCC close to the package with at least 0.1 uF, and route analog and digital grounds separately to avoid digital switching noise coupling into the SAR comparator.
TLC545ING4 - 8-Bit 76 kSPS ADC, 19-Ch Serial, 28-DIP | TI
The Texas Instruments TLC545ING4 is an 8-bit, 76 kSPS successive-approximation analog-to-digital converter with a 19-input analog multiplexer and a serial interface, housed in a 28-pin PDIP (0.600 inch / 15.24 mm) through-hole package. It integrates a switched-capacitor ADC core, on-chip 20-channel (19 external + 1 self-test) analog MUX, sample-and-hold, and a synchronous serial port compatible with most microprocessors. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts a continuous analog voltage on one of its input pins into a discrete binary code. Successive-approximation ADCs like the TLC545ING4 use an internal binary-search algorithm combined with an internal DAC to resolve the input one bit at a time per clock cycle. In the broader taxonomy, the TLC545ING4 sits as: ADC -> data converter -> data acquisition IC -> mixed-signal IC -> semiconductor. The 8-bit resolution and integrated analog MUX place it in the low-cost, microcontroller-peripheral class of converters. Key specifications include 8-bit resolution, 19 single-ended analog input channels, 76 kSPS maximum sampling rate (9 us typical conversion time), single +5 V analog supply, and a serial output interface. Operating temperature spans -40 C to +85 C (industrial grade). The on-chip analog multiplexer accepts 19 external inputs plus one self-test channel, dramatically reducing external analog switch circuitry in multi-channel data-acquisition systems. The TLC545ING4's internal architecture combines a charge-redistribution DAC, successive-approximation register (SAR), and comparator. The serial interface uses four control lines (CS, I/O Clock, Address, Data Out) to communicate with virtually any host microcontroller. The device offers both hardware and software-controlled conversion modes and includes a built-in self-test mode for in-system diagnostics. Typical applications include process control, factory automation, portable instrumentation, multi-channel data loggers, and embedded monitoring where a microcontroller needs to digitize many analog signals with minimal external components. The integrated 19-channel MUX eliminates the need for external analog switches in most multi-sensor systems. When designing with the TLC545ING4, ensure the analog input source impedance is below the datasheet-specified maximum to avoid conversion errors from incomplete settling through the internal MUX and sample capacitor. Use the device's built-in self-test mode at power-up to validate the ADC core. This page synthesizes distributor stock, drop-in pin-compatible alternatives, and design notes not collected in any single manufacturer document.
TLC549CD - 8-Bit 40kSPS SAR ADC Serial Out | Texas Instruments
The Texas Instruments TLC549CD is an 8-bit, 40-kSPS successive-approximation analog-to-digital converter with a serial 3-state data output, housed in an 8-pin SOIC (D) package. It accepts a single-ended analog input with differential reference input voltages and integrates an on-chip software-controllable sample-and-hold function. Maximum conversion time is 17 µs, supporting up to 40,000 conversion cycles per second from a single 3V to 6V analog supply. A successive-approximation register (SAR) ADC is a converter architecture that uses a binary-search algorithm against an internal digital-to-analog converter to determine each input code, one bit per clock cycle. Compared with integrating or flash ADCs, SAR converters balance moderate speed, low power, and 8-to-18-bit resolution, making them the standard topology for microcontroller peripheral A/D channels and standalone data-acquisition front-ends. The TLC549CD specifically targets low-power applications where serial data transfer to a host processor or peripheral is acceptable in exchange for minimal pin count. Key features of the TLC549CD include on-chip software-controllable sample-and-hold, differential reference input voltages that allow ratiometric conversion, a 3-state serial data output that simplifies bus sharing with other peripherals, and total access and conversion time of 17 µs max. The part is designed for either microprocessor-peripheral or fully standalone operation, with I/O CLOCK, chip select (/CS), and DATA OUT forming a serial interface compatible with many 8-bit microcontrollers of its era. The 8-pin SOIC package simplifies PCB layout where analog and digital grounds can be cleanly separated. The TLC549CD integrates a switched-capacitor successive-approximation architecture with 8-bit resolution and an 8-bit on-chip sample-and-hold circuit. The serial interface uses three signals (CS, I/O CLOCK, DATA OUT) and is a subset of the SPI specification, allowing direct connection to most microcontrollers and DSPs. The differential reference inputs permit ratiometric conversion when REF+ and REF- are derived from the input signal chain, improving immunity to absolute reference drift. Typical applications include digital panel meters, portable instrumentation, temperature and process controllers using sensors such as thermocouples or thermistors, battery monitoring in consumer products, and low-speed data loggers. The serial output makes it well suited to microcontroller systems with limited GPIO availability, and the 5V single-supply operation matches legacy 5V digital rails commonly found in industrial controllers. When designing with this device, place a 10 µF (or larger) bypass capacitor directly at the VCC pin and keep the analog input traces short and guarded to preserve the 8-bit resolution. The differential reference inputs must be driven from a low-impedance source to maintain conversion accuracy; the reference voltage range sets the full-scale input range (REF- to REF+).
TLC549IDR - 8-Bit 40kSPS Serial SAR ADC | Texas Instruments
The Texas Instruments TLC549IDR is an 8-bit, 40 kSPS serial-output successive-approximation analog-to-digital converter (ADC) housed in an 8-pin SOIC package. It operates from a single 5V analog supply and a separate digital supply, draws only 1.8 mA typical operating current, and integrates an on-chip software-controllable sample-and-hold. The serial interface uses three wires (CS, I/O CLOCK, DATA OUT) for direct connection to most microcontrollers. An SAR (Successive-Approximation Register) ADC is a type of data converter that performs bit-by-bit comparison of the analog input against an internal precision DAC, producing a digital code after N conversion cycles for N-bit resolution. SAR ADCs sit in the broader data-acquisition signal chain alongside delta-sigma and pipeline architectures, and the TLC549's low pin count and 3-wire serial interface make it one of the canonical microcontroller-peripheral ADCs of its generation. Key features include 17 microsecond maximum total access and conversion time, a differential reference input that supports ratiometric measurements, and software-controlled sample-and-hold operation. The device is pin-compatible with the TLC540/545/1540 family, enabling easy migration to higher channel counts or 10-bit resolution. Its micropower consumption and tiny 8-SOIC footprint suit space- and battery-constrained designs. The TLC549 uses a switched-capacitor charge-redistribution DAC core, controlled by an on-chip SAR. Conversion is triggered by the falling edge of CS, after which 8 I/O CLOCK cycles shift the conversion result out LSB-first on DATA OUT, supporting both standalone and microprocessor-peripheral operation. Typical applications include portable instrumentation, sensor signal digitization (thermistors, potentiometers, strain gauges), battery monitoring, simple process control loops, and embedded data logging. Designers choose the TLC549 when 8-bit resolution and moderate speed are sufficient and PCB area is at a premium. When designing with this device, place 0.1 microfarad decoupling capacitors close to both the analog and digital supply pins, keep the analog input traces short, and ensure that REF+ minus REF- stays within the 1V to 5V differential range. Driving CS low for longer than the conversion time initiates a new conversion cycle. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the TLC549IDR for new designs and legacy system maintenance.
TLC549IDRG4 - 8-Bit 40kSPS Serial ADC | Texas Instruments
The Texas Instruments TLC549IDRG4 is an 8-bit successive-approximation (SAR) analog-to-digital converter (ADC) with a serial interface, offering 40 kSPS sampling rate in an 8-pin SOIC (D) package. The part operates from a single 3V to 6V analog supply and includes a differential analog reference input pair (REF+ and REF-) that allows scaling the input range to any span within the supply rails. The device is the tape-and-reel (TR) shipping variant of TLC549ID and uses the G4 suffix denoting Pb-free assembly. A SAR ADC is a converter architecture that uses a binary-search successive-approximation register to step an internal DAC toward the analog input, producing one conversion per N clock cycles where N equals the bit resolution. Within the broader ADC taxonomy, SAR ADCs sit between flash converters (very fast, expensive, high power) and sigma-delta converters (very high resolution, lower speed), making SAR the dominant choice for general-purpose 8-12 bit data acquisition at sample rates from 1 kSPS to 1 MSPS. The TLC549 family uses this architecture to combine low power consumption with deterministic conversion latency, ideal for microcontroller-peripheral roles. Key specifications include 8-bit resolution, 17 microseconds maximum total access-and-conversion time, single-channel differential analog input, and a chip-select (active-low CS) serial interface compatible with SPI and Microwire peripherals. Per the TI datasheet, the converter draws approximately 1.5 mA active supply current and offers software or hardware power-down control via the CS pin. The differential reference gives designers flexible scaling - the analog input span equals REF+ minus REF-, allowing gain/offset trimming in instrumentation circuits without external amplifiers. Typical applications include portable data loggers, battery monitoring circuits, remote sensor read-back interfaces, simple digital panel meters, and stand-alone analog front-ends for embedded microcontrollers. The wide supply range and low power consumption also make it well-suited for 4-20 mA loop-powered industrial sensors. The 8-bit resolution is adequate for temperature, position, and process-variable readouts where 1 LSB accuracy (»0.4% FS at 5V reference) is acceptable. One design consideration is that the serial clock and chip-select timing must respect the 17-microsecond conversion budget; reading the previous conversion result overlaps with starting the next conversion in standard SPI mode 0, an efficient dual-purpose cycle that minimizes throughput overhead.
TLC5540CPWRG4 - 8-Bit 40 MSPS Flash ADC, 24-TSSOP | Texas Instruments
The Texas Instruments TLC5540CPWRG4 is an 8-bit, 40-MSPS (megasamples per second) flash analog-to-digital converter (ADC) with a single input channel and internal sample-and-hold, housed in a 24-pin TSSOP (PW) package. It uses a semiflash architecture implemented in CMOS, combining high-speed conversion with low power consumption and low cost, while delivering differential linearity of ±0.3 LSB (typical) / ±1 LSB (max) and an analog input bandwidth of approximately 75 MHz (typical), which makes the device well suited to undersampling IF/RF signals. An ADC (analog-to-digital converter) is a data-acquisition mixed-signal IC that converts a continuous-time analog voltage on its input pin into a discrete digital code at its output. Within the broader signal-chain taxonomy, the TLC5540 sits at the A-to-D stage between an analog front end (sensor, op-amp buffer, or anti-alias filter) and a digital processor (DSP, microcontroller, or FPGA). The 8-bit flash/semiflash class targets high-speed, moderate-resolution applications such as video digitizers, CCD imaging pipelines, digital oscilloscopes, and communication baseband/IF digitizers where sample rate matters more than resolution. The TLC5540 family improves on pure-flash designs by halving the number of comparators, which reduces die area, input capacitance, and power. Key features of the TLC5540CPWRG4 include: 40 MSPS guaranteed minimum conversion rate, single +5 V analog supply, TTL/CMOS-compatible digital outputs, internal reference resistors, low input capacitance, and an external bias-pin connection for trimming full-scale range. The semiflash architecture inherently provides a sample-and-hold function on the analog input, eliminating the need for an external track-and-hold amplifier in most system designs. Power consumption scales with sampling rate, and the wide digital bus widths allow direct interfacing to a micro or DSP for the digital data. Typical applications for the TLC5540CPWRG4 include video digitizing, CCD imaging, digital communication IF sampling, ultrasound front-end processing, and low-cost digital oscilloscope channels. The wide analog input bandwidth (75 MHz typical) also enables direct IF undersampling in low-cost communication receivers. For higher resolution, the same TSSOP-24 footprint is shared with TI's 10-bit and 12-bit companion parts, allowing PCB reuse when upgrading resolution. When designing with the TLC5540CPWRG4, drive the analog input through a low-impedance, wideband op-amp buffer (such as the OPA354 or LMH6702) to minimize aperture-time distortion, and decouple the analog and digital supplies separately with 0.1 µF ceramic capacitors placed close to the supply pins. Avoid routing digital output switching currents near the analog input trace, and provide a solid ground plane under the device for low-noise operation. This page synthesizes distributor pricing, drop-in TSSOP-24 alternatives (TLC5540IPWRG4, TLC5540CPWR, TLC5540CPWG4), comparison parameters not collected on a single datasheet page, and practical PCB layout guidance not present in the manufacturer datasheet.
TLV0834 - 8-Bit 41 kSPS 4-Ch SAR ADC | Texas Instruments
The Texas Instruments TLV0834 is a low-power, 8-bit successive-approximation register (SAR) analog-to-digital converter with a software-configurable 4-channel input multiplexer supporting single-ended, differential, and pseudodifferential input assignments. It operates from a 2.7V to 3.6V supply, achieves a maximum sampling rate of 41 kSPS, and provides serial input/output compatible with TTL and MOS logic levels. Packages include 16-pin TSSOP (PW) and 16-pin SOIC (D). An ADC is a semiconductor device that converts continuous analog signals into discrete digital values so microprocessors can process real-world sensor data. The TLV0834 belongs to the SAR ADC family, which balances speed, resolution, and power for medium-speed data acquisition, within the broader hierarchy of data converter ICs and mixed-signal semiconductors. Key features include 8-bit resolution with no missing codes, 41 kSPS maximum throughput, a 2/3/4-channel multiplexer with software address logic, and differential input capability that enables common-mode rejection or offset of the analog zero point. The device operates ratiometrically or with a VCC reference, simplifying reference design in low-voltage systems. Architecturally, the TLV0834 uses a sample-data comparator performing successive approximation on the selected differential input pair. The serial interface minimizes pin count and supports easy microprocessor interface or stand-alone operation. The analog input range spans from ground (0 V) to VCC when using the VCC reference, covering the full supply span without external scaling in many designs. Typical applications include portable and battery-powered instrumentation, multi-channel industrial data acquisition, and remote sensor monitoring. Low supply voltage and serial output make it compatible with modern microcontrollers and DSPs such as the TI MSP430 family. Design consideration: never let analog inputs exceed VCC, and decouple the supply with a 0.1uF ceramic capacitor close to the pin for stable conversions. Prices referenced are as of 2026-08-29.
TLV0834CPWRG4 - 8-Bit 41kSPS 4-Ch SAR ADC, 16-TSSOP | Texas Instruments
The Texas Instruments TLV0834CPWRG4 is an 8-bit, 41 kSPS, successive-approximation analog-to-digital converter (SAR ADC) with 2/3/4 configurable input channels and a serial interface, housed in a 16-pin TSSOP package. It operates from a single 2.7 V to 3.6 V VCC supply, supports TTL/MOS-compatible digital I/O, and delivers 8-bit resolution with ratiometric or VCC-referenced conversion modes. The 'G4' suffix designates the green (Pb-free) RoHS-compliant tape-and-reel packaging option. A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm with an internal capacitive charge-redistribution DAC and a high-speed comparator to digitize an analog input in N clock cycles for N-bit resolution. Within the broader data-acquisition signal chain, the SAR ADC sits between analog signal conditioning (op-amps, muxes) and the digital host, and belongs to the family of precision converters alongside delta-sigma, pipeline, and dual-slope architectures. The TLV0834 family targets low-cost, low-power, multi-channel digitization where 8 bits are sufficient. Key features include 41 kSPS throughput, 2.7 V to 3.6 V single-supply operation, an input-configurable 4-channel multiplexer with address logic, an easy microprocessor or stand-alone serial interface, and TTL/MOS-compatible I/O levels. An on-chip sample-and-hold and differential reference input simplify external circuitry, while the serial data output reduces I/O count on the host MCU. The TSSOP-16 footprint keeps the device compatible with low-profile, surface-mount designs. The device uses a successive-approximation register architecture with switched-capacitor charge redistribution, providing deterministic latency that simplifies DSP or MCU firmware synchronization. Its low current consumption (~0.5 mA typical) makes it suitable for battery-powered monitoring, and the wide supply range aligns with modern 3.3 V microcontroller rails. Typical applications include portable instrumentation and battery monitoring, multi-sensor microcontroller data acquisition (temperature, pressure, level), industrial process control loopbacks, audio VU/log metering, and simple system monitoring boards (PSU rails, fan tach, thermistor bridges). When designing with this part, note that it is now obsolete and no longer manufactured. New designs should use the parametric-equivalent TLV0834CPWR (active, Pb-free tape-and-reel without 'G4') or the industrial-temperature TLV0834IPW for new product introductions; both share the 16-pin TSSOP footprint. Plan for last-time-buy inventory or substitute selection accordingly. This page synthesizes the manufacturer's datasheet, distributor stock status (DigiKey reports 65,490 units of the recommended substitute TLV0834CPWR in stock), parametric comparisons across the TLV083x/ADC083x families, and practical design notes not consolidated in any single source.
TLV0838ING4 - 8-Bit 8-Ch SAR ADC, 3.6V, Serial I/O | Texas Instruments
The Texas instruments TLV0838ING4 is an 8-bit successive-approximation analog-to-digital converter with an input-configurable multichannel multiplexer and a serial I/O interface, supplied in a 20-pin PDIP package and operating from a 2.7 V to 3.6 V single supply. A successive-approximation-register (SAR) ADC is a precision data-converter architecture that converts an analog input into a binary code by iteratively comparing the input against an internal DAC and a binary-weighted search tree. SAR ADCs are valued for deterministic latency, no pipeline delay, intrinsic sample-and-hold behavior, and excellent dc accuracy, which makes them the workhorse of low-to-medium-speed precision instrumentation, industrial control loops, and embedded sensor interfaces. The TLV0838 family sits within the data-acquisition IC category, one rung below signal-chain ICs and one rung above general-purpose analog building blocks. Key features include 8 input channels (software-selectable through the address logic inputs), an input range of 0 V to VCC when using VCC as the reference, on-chip sample-and-hold, ratiometric or absolute-voltage conversion modes, and a simple 4-wire serial interface compatible with standard shift registers and common microcontrollers. Maximum throughput is specified for the serial clock, and the analog inputs tolerate VCC + 0.3 V without damage. The device uses an asynchronous serial output protocol that streams the conversion result MSB-first on a single data line, simplifying isolation or long-trace routing between the ADC and a host MCU. An end-of-conversion (EOC) signal flags when a new sample is ready, allowing interrupt-driven data acquisition. The wide digital-supply tolerance and TTL-compatible inputs ease integration with both 3.3 V and 5 V logic families. Typical applications include battery monitoring in portable equipment, multi-zone temperature or process-variable scanning via external sensors, keypad and panel-meter digitizing, and low-cost multi-channel data loggers. The 8-channel mux allows one ADC to replace eight discrete signal paths, reducing PCB area and BOM cost in embedded designs. When designing with this device, ensure that the analog source impedance is below the value specified in the datasheet to avoid sample-and-hold droop; a small external buffer (e.g., an op-amp follower) can be inserted if higher source impedances are required. Decouple VCC with both a 0.1 uF ceramic and a bulk capacitor placed within 5 mm of the supply pin. This page synthesizes distributor pricing, drop-in and equivalent alternatives, and practical layout notes drawn from the manufacturer datasheet, not found on DigiKey or Mouser product listings alone.
TLV1504IDR - 10-Bit 200kSPS 4-Ch SAR ADC, SOIC-16 | TI
The Texas Instruments TLV1504IDR is a 10-bit, 200 kSPS, 4-channel successive-approximation-register (SAR) analog-to-digital converter (ADC) with a serial interface, housed in a 16-pin SOIC (D) package. It operates from a single 2.7 V to 5.5 V analog and digital supply, draws only 1.6 mA at full speed, and drops to <10 µA in hardware, software, or automatic power-down mode, making it ideal for battery-powered and power-conscious designs. An SAR ADC is a successive-approximation-register analog-to-digital converter that uses a comparator, a DAC, and a binary-search register to digitize an analog input in N conversion cycles for N-bit resolution. SAR ADCs are valued for deterministic latency, no-pipeline delay, and excellent DC accuracy, fitting between low-resolution delta-sigma ADCs and high-speed pipeline ADCs in the data-converter family hierarchy: ADC -> data converter -> mixed-signal IC -> power management & signal chain IC -> semiconductor. Key features include four analog input channels with a programmable auto-channel sweep sequencer, a high-speed 3-wire serial interface compatible with TMS320 DSPs and SPI/QSPI/MICROWIRE hosts, programmable 8/12/16-clock or continuous conversion modes, hardware or software shutdown control, and an integrated +2.5 V reference option (TLV1504 variant) or external-reference option. Maximum conversion time is 3.86 µs and INL/DNL are specified for 10-bit accuracy across the full operating range. Typical applications include industrial process control loop monitoring, multi-sensor data acquisition modules, portable instrumentation and battery management monitors, motor control feedback sampling, and 4-20 mA loop digitization. The wide 2.7 V to 5.5 V supply range and on-chip auto-powerdown modes allow the device to remain in the system across sleep-active cycles without external power switching hardware. When designing with this device, ensure the SPI master supplies 8, 12, or 16 SCLKs per conversion per the datasheet; underrun or overrun of SCLKs corrupts the conversion register. The auto-channel sweep feature requires the sequencer to be initialized after each power-up, otherwise channel order is undefined. This page synthesizes drop-in alternatives, distributor pricing tiers, and practical design notes not found on the manufacturer datasheet.
TLV1504IDRG4 - 10-Bit 200kSPS 4-Ch SAR ADC | Texas Instruments
The Texas Instruments TLV1504IDRG4 is a 10-bit, 200-kSPS, 4-channel successive-approximation-register (SAR) analog-to-digital converter housed in a 16-pin SOIC package. It operates from a single 2.7 V to 5.5 V supply and supports both single-ended and pseudo-differential input pairs, drawing only 1.5 mW at 3 V and 200 kSPS for power-efficient multi-channel data acquisition. What is a SAR ADC? A successive-approximation-register ADC is a precision data converter that uses a binary-search algorithm and an internal capacitive charge-redistribution digital-to-analog converter (DAC) to resolve an analog input one bit per clock cycle. SAR ADCs are prized for their deterministic latency, low power consumption, and excellent DC accuracy; they sit in the hierarchy of analog-to-digital converters alongside flash, sigma-delta, and pipeline architectures. SAR parts are favored in multiplexed multi-channel systems, motor-control loops, and precision sensor signal chains where DC accuracy and predictable sampling latency matter more than absolute speed. Key features of the TLV1504IDRG4 include a hardware-controllable 4-input analog multiplexer, an internal +2.5 V reference (also usable as an output), an SPI/QSPI/Microwire-compatible serial interface, software-configurable unipolar/bipolar ranges, and a hardware power-down pin that reduces current to under 5 uA. The 16-pin SOIC (D) package supports industrial-temperature operation from -40 C to +85 C. The architecture pairs an input sample-and-hold with the SAR logic and a low-drift internal bandgap, yielding zero missing codes and ±0.5 LSB typical INL/DNL. The wide 2.7 V to 5.5 V analog-and-digital common supply simplifies system design by eliminating the need for a separate analog supply rail, and the integrated reference removes a board-level component in cost-sensitive designs. Typical applications include multi-channel sensor digitisation in industrial process control, portable battery-powered instrumentation, HVAC thermistor and pressure-sensor arrays, motor-speed and current-feedback loops, and PLC analog input modules. The combination of low power, small footprint, and integrated reference suits it to dense 4- to 8-channel analog front ends. When designing with this ADC, decouple AVDD and DVDD separately with 0.1 uF ceramics placed within 5 mm of the pins, and route the analog inputs as guard-traced differential pairs to minimise crosstalk between multiplexer channels. Although the internal reference simplifies layout, a 10 uF tantalum bypass is recommended for systems with >4 channels sampled at full speed. This page synthesises distributor pricing, drop-in alternatives, and practical design notes not consolidated on the manufacturer datasheet alone.
TLV1508IDWRG4 - 10-Bit 200kSPS 8-Ch Serial ADC | Texas Instruments
The Texas Instruments TLV1508IDWRG4 is a 10-bit, 200 kSPS, low-power, CMOS successive-approximation analog-to-digital converter (SAR ADC) housed in a 20-pin SOIC (DW) package. It operates from a single 2.7 V to 5.5 V supply, offers 4 or 8 analog input channels with a 3.86 us maximum conversion time, and integrates hardware, software, and auto power-down plus a programmable channel sweep. The serial interface uses a 4-wire SPI-compatible bus (CS, SCLK, SDI, SDO). A successive-approximation register ADC is a type of analog-to-digital converter that uses a binary search algorithm against an internal precision DAC to resolve each input voltage in a fixed number of clock cycles. SAR ADCs sit in the broader hierarchy of analog-to-digital converters -> data converters -> signal-chain ICs -> mixed-signal semiconductors. Compared with delta-sigma ADCs, SAR parts offer deterministic latency and very low power consumption at moderate sample rates, which is why they dominate multiplexed multi-channel data-acquisition front ends. Key specifications include 0.0488% maximum linearity error (DNL/INL), a true 200 kSPS throughput, hardware and software-configurable power-down to extend battery life, and an industrial -40C to +85C operating range. The device includes a built-in oscillator, sample-and-hold, and programmable auto-channel sequencing that cycles through 1 to 8 channels without host MCU intervention. Three digital input pins and a 3-state SDO output allow direct glueless connection to virtually any DSP, microcontroller, or FPGA. Typical applications include multi-channel data acquisition, portable instrumentation, battery-powered sensor modules, factory automation analog front ends, and process control I/O. The wide supply range and ultra-low power-down current also make it attractive for handheld and remote-monitoring equipment. The internal channel sequencer is particularly valuable in cyclic-scanning systems where deterministic sample-to-channel mapping simplifies firmware. Designers should observe careful analog input layout: keep analog traces short, place a small RC anti-alias filter ahead of each input channel, and ensure the AVDD supply is well-bypassed with both 0.1 uF and 10 uF capacitors close to the pin. The auto-power-down mode can be triggered by software after each conversion to drop supply current to the microampere range between scans, dramatically lowering average power in slow-scanning battery applications.
TLV1562IDWRG4 - 10-Bit 2MSPS Quad ADC w/4-CH Mux | TI
The Texas Instruments TLV1562IDWRG4 is a 10-bit, 2 MSPS reconfigurable low-power analog-to-digital converter with a four-input analog multiplexer, dual sample-and-hold, parallel interface and power-down mode, housed in a 28-pin SOIC (DW) package. Key headline parameters: 10-bit resolution, 2 MSPS max throughput at 10-bit (single channel, 5 V), ±1 LSB DNL and ±1 LSB INL (max), and a 5.5 V absolute-maximum analog input. An 8-bit mode pushes throughput to 3 MSPS, while the quad-input mux and dual S/H let one chip replace two or three conventional ADCs in multi-channel systems. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog waveform and quantizes each sample into a binary code word. SAR (successive-approximation register) ADCs like the TLV1562 use a binary-search algorithm with an internal DAC and comparator to resolve each conversion in N clock cycles, achieving deterministic latency and excellent DC accuracy. The TLV1562 belongs to the SAR ADC sub-family, sits under the broader ADC/DAC product hierarchy, and is classed as a data-conversion IC within mixed-signal semiconductor products. The TLV1562 IDWRG4 features a programmable resolution-and-speed trade-off (10-bit/2 MSPS or 8-bit/3 MSPS), four analog input channels with software-selectable channel addressing, two simultaneous sample-and-hold amplifiers for capture of two channels at once, an auto- or software-controlled power-down mode that drops supply current for battery-powered operation, and a parallel microprocessor-compatible output bus that simplifies hook-up to DSPs, microcontrollers and FPGAs. Architecturally the device combines an input mux, a high-impedance input S/H front end, a 10-bit charge-redistribution SAR core with internal reference, a state-machine sequencer for auto-scan operation, and a parallel output register with three-state bus drivers. The reconfigurable resolution/throughput knob lets system designers trade SNR for speed without changing the analog front end. Typical applications include multi-channel data acquisition front ends, portable instrumentation with battery-saving duty-cycling, motor-control feedback loops reading two currents and one voltage simultaneously, optical sensor arrays with quad-channel scanning, and DSP-based audio/video processing where the parallel interface avoids serial-port bottlenecks. When designing with this part, pay particular attention to input-channel sequencing, reference bypassing and the S/H acquisition-time budget. Choosing software-mode power-down reduces IDD to a few hundred microamps between conversions - useful for handheld instruments where the ADC must wake, convert a burst and return to sleep. This page synthesizes distributor pricing, drop-in alternatives in the same 28-SOIC footprint and practical design notes not found on the manufacturer datasheet cover page.
TLV2544QDRG4 - 12-Bit 200kSPS 4-Ch SAR ADC | Texas Instruments
The Texas Instruments TLV2544QDRG4 is a 12-bit, 200-kSPS, 4-channel, low-power, serial-output successive-approximation-register (SAR) analog-to-digital converter with AutoPower-Down, supplied in a 16-pin SOIC (D) package. It operates from a single 3 V to 5.5 V analog supply, integrates a built-in reference, conversion clock, and an 8× FIFO, and targets cost- and power-sensitive multi-channel data-acquisition systems. The Q-suffix designates the automotive temperature grade (-40 °C to +125 °C), and the G4 suffix denotes tape-and-reel packaging with Pb-free finish. A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm against a precision DAC to resolve each input sample in N clock cycles, where N is the resolution in bits. SAR ADCs offer deterministic latency, no pipeline delay, excellent dynamic performance at moderate sample rates, and very low standby power - features that make them ideal for multiplexed sensor systems, motor-control feedback loops, and instrumentation where every conversion must complete in a known time. The TLV2544QDRG4 inherits all of these SAR traits and adds hardware (CS) and software (S/W) AutoPower-Down control, dropping supply current after each conversion to extend battery life in portable and remote installations. The device digitizes up to four single-ended inputs through an internal analog multiplexer at up to 200 kSPS aggregate throughput, and provides a 4-wire SPI/QSPI/MICROWIRE-compatible serial interface. AutoPower-Down reduces quiescent current to a few microamps between conversions, and differential non-linearity / integral non-linearity errors are specified at ±1.2 LSB maximum up to 125 °C. A signal-to-noise-plus-distortion ratio above the SNR figure cited for the family supports 12-bit effective resolution at the full sampling rate. Architecturally, the TLV2544QDRG4 combines a charge-distribution DAC array, a high-bandwidth input sample-and-hold, an internal 2.5 V reference (or external reference option via REFin), a digital conversion-control state machine, and the AutoPower-Down timing block. The reference and oscillator are fully internal, eliminating external components and shrinking BOM cost in space-constrained systems. Typical applications include automotive sensor interfaces, multi-channel industrial process control, battery-powered portable instrumentation, motor-speed/temperature monitoring, and any multi-channel data logger that needs deterministic low-latency 12-bit conversion. Compared with the TLV2548Q (which is the 8-channel pin-compatible cousin of the same family), the TLV2544QDRG4 trades two analog input channels for a smaller BOM footprint when only four channels are required. During design, keep analog and digital grounds tied to a single star point near the AGND pin, decouple AVDD with a 10 µF tantalum plus 0.1 µF ceramic combination within 5 mm of the pin, and observe the device's 200 kSPS maximum throughput budget when sequencing multi-channel conversions.
TLV2545IDGKR - 12-Bit 200 kSPS Serial ADC | Texas Instruments
The Texas Instruments TLV2545IDGKR is a 12-bit, 200 kSPS successive-approximation analog-to-digital converter with a serial output, housed in an 8-pin VSSOP (DGK) package. Operating from a single 2.7 V to 5.5 V supply, the part features a 1-channel single-ended or pseudo-differential input, integrated conversion clock, autopower-down between conversions, and SPI/DSP-compatible serial interface that supports up to 10 MHz clock rates and TMS320 DSP connections. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous analog voltage and produces a discrete digital code, and a successive-approximation-register (SAR) ADC does so by iteratively comparing the input against an internal DAC, achieving an excellent balance of speed, accuracy, and power consumption for precision low-frequency and audio-bandwidth signals. The TLV2545 belongs to the broader hierarchy of data-converter ICs, which sit within signal-chain and power-management semiconductor families. Key features of the TLV2545 include ±1 LSB maximum INL and DNL, 72 dB SINAD, and 85 dB SFDR at a 20 kHz input tone, along with a 3.5 µs typical conversion time and a flexible SCLK/FS-compatible serial interface. The autopower-down feature reduces current draw to a few microamps between conversions, which is critical for battery-powered and energy-harvesting applications where average load matters more than peak throughput. The architecture uses a charge-redistribution SAR core with an internal sample-and-hold and on-chip oscillator, eliminating the need for an external clock. The pseudo-differential input stage simplifies board layout by accepting ground-referenced signals without a negative rail, while the wide supply range permits direct interface to 3.3 V microcontrollers, 5 V DSPs, or low-voltage battery stacks. Typical applications include portable instrumentation, motor-control feedback loops, battery monitoring, sensor signal conditioning, point-of-load monitoring in industrial control, and audio-bandwidth digitization for consumer audio and telecommunications equipment. The 8-pin VSSOP footprint suits space-constrained designs. When designing with the TLV2545, place 100 nF decoupling close to the supply pin and follow layout practices that keep digital return currents away from the analog input. The SCLK clock rate must remain within the 10 MHz SPI specification, and CS falling-edge timing relative to SCLK should be reviewed against the TMS320 interface diagrams in the datasheet. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the same TI VSSOP-8 ADC family, and practical layout notes that go beyond what the manufacturer datasheet alone provides.