ADC/DAC
Products (2398)
PADC34J44IRGZT - 14-Bit 125 MSPS Quad-Channel ADC | Texas Instruments
The Texas Instruments PADC34J44IRGZT is a 14-bit, 125 MSPS (mega-samples per second) quad-channel pipelined analog-to-digital converter (ADC) housed in a 48-pin VQFN (RGZ) 7x7 mm package with an exposed thermal pad. It features four simultaneous-sampling analog inputs, a 1.8 V analog supply, a low-latency digital interface, and integrated analog front-end signal conditioning that drives JESD204B serial data output across up to four lanes. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous analog voltage levels and quantises them into discrete binary codes for downstream digital signal processing. Within the broader signal-chain taxonomy, the PADC34J44 sits at the ADC layer, under high-speed converters and then data converters, which themselves form a sub-category of data acquisition (DAQ) and mixed-signal ICs. Pipelined ADCs use a multi-stage switched-capacitor architecture that balances resolution, speed, and power efficiency, making them the dominant choice for sample rates from 10 MSPS to 500 MSPS where successive-approximation-register (SAR) ADCs become impractical. Key differentiating specifications include four truly simultaneous-sampling 14-bit channels at up to 125 MSPS, a JESD204B subclass 0/1 deterministic serial interface (up to 4 lanes, lane rates up to 3.5 Gbps), LVDS-compatible data formats, and on-chip input termination with a 50 MHz analog input bandwidth. The integrated analog front-end typically provides up to 2 Vpp differential full-scale input range, programmable gain, and dither for harmonic-distortion improvement. Power consumption is in the low hundreds of mW per channel at full sample rate, with flexible power-down modes for portable or duty-cycled applications. Typical applications include multi-channel communications receivers (cellular base-station digitiser cards, software-defined radio platforms), medical imaging front-ends (portable ultrasound beamformers, multi-channel MRI receivers), industrial multi-axis vibration analysis, and defense electronic-warfare subsystems. The combination of quad channels, 125 MSPS, and JESD204B output allows designers to consolidate four converter channels plus their LVDS routing into a single 7x7 mm IC, reducing board area and simplifying FPGA capture logic compared to parallel-output ADCs. When laying out the PCB, route the analog inputs as 50-ohm differential pairs with length matching, keep the 1.8 V AVCC plane well-decoupled, and provide a solid ground pour beneath the exposed pad for thermal and signal-integrity reasons; the JESD204B serial lines should be routed as 100-ohm differential pairs to the FPGA, with AC-coupling capacitors placed close to the transmitter pins per the JESD204B specification.
PADC34J45IRGZT - 14-Bit 160MSPS Quad ADC | Texas Instruments
The Texas Instruments PADC34J45IRGZT is a 14-bit, 160 MSPS quad-channel analog-to-digital converter (ADC) using a pipelined architecture, packaged in a 48-pin VQFN with exposed pad. It accepts up to 4 differential analog inputs, samples at 160 MSPS, and serializes the digital output through a JESD204B subclass-0/-1 compliant interface. The device is offered in a 7.00 mm x 7.00 mm VQFN-48 (RGZ) package and operates from -40C to +85C. Multiples of the PADC34J45 are cascadable to expand channel count in densely sampled systems. A pipelined ADC is a high-speed converter architecture that breaks the conversion process into multiple low-resolution flash stages separated by sample-and-hold (S/H) amplifiers and DAC residue generators. Pipelined architectures achieve sample rates in the hundreds of MSPS while maintaining 12- to 16-bit resolution; they sit hierarchically below flash ADCs (fastest, lowest resolution) and above successive-approximation-register (SAR) ADCs (slower, highest resolution) on the speed-vs-resolution trade-off curve. The pipelined ADC category belongs to the larger data-converter IC family within signal-chain semiconductors, which also includes DACs, comparators, and integrated analog front ends. Key features of the PADC34J45IRGZT include a 14-bit resolution, 160 MSPS maximum sample rate, differential analog inputs with on-chip input termination, a JESD204B serial lane output (up to 4 lanes) with deterministic latency, an internal low-jitter clock multiplier, and an exposed thermal pad for low-thermal-resistance PCB mounting. The pipelined core is corrected by an internal calibration engine that trims residue-gain errors at power-up, allowing the part to hold its integral nonlinearity and spurious-free dynamic range over the full -40C to +85C industrial temperature range. Typical applications of the PADC34J45IRGZT include multi-channel communications receivers, wideband oscilloscopes and digitizers, medical imaging front ends, software-defined radio (SDR) platforms, phased-array radar digitizers, and industrial test and measurement instrumentation. The JESD204B output simplifies board routing by replacing wide parallel LVDS buses with one or more serialized CML lanes, easing layout in dense multi-channel systems. When designing with this device, pay close attention to PCB layout: the exposed thermal pad must be soldered to a continuous ground plane to keep the junction below 125C. The analog input network typically uses an RF transformer or a fully differential amplifier with back-to-back clamping diodes, and the JESD204B lanes require 100-ohm differential controlled-impedance routing with length matching within the lane de-skew budget.
PCF8591T - 8-bit I2C ADC/DAC, 4-Ch Input | NXP Semiconductors
The NXP PCF8591T is a single-chip, single-supply, low-power 8-bit CMOS data acquisition device that integrates four analog inputs, one analog output, and a serial I2C-bus interface in a 16-pin SO (SOT162-1) surface-mount package. The PCF8591T combines an 8-bit successive-approximation A/D converter and a single 8-bit D/A converter on the same die, allowing a single I2C addressable device to handle both digitizing external analog signals and reconstructing an analog voltage for control or waveform output. The maximum I2C-bus clock operates up to 11.1 kHz symbol rate per the DigiKey listing. What is an 8-bit data acquisition IC? A data acquisition (DAQ) IC is a mixed-signal integrated circuit that bridges the analog and digital domains, typically containing one or more analog-to-digital converters (ADCs) and sometimes digital-to-analog converters (DACs) along with a digital interface for a host microcontroller. Within the broader taxonomy, the PCF8591T is an 8-bit successive-approximation ADC with an 8-bit DAC, controlled via an I2C serial interface - falling into the category of low-speed, low-resolution, system-management data converters used for sensor reading, setpoint generation, and analog control loops in embedded designs. Key features of the PCF8591T include four multiplexed single-ended analog inputs (or three differential inputs selectable via the control byte), one rail-to-rail analog output, three hardware address pins (A0-A2) allowing up to eight devices on the same I2C bus without glue logic, and a single 2.5V to 6V supply. The on-chip track-and-hold and successive-approximation ADC delivers 8-bit resolution at typical conversion rates suitable for sensor monitoring and process control. The DAC section can be configured for 4-quadrant multiplication when an external reference is supplied, enabling digitally controlled gain and offset in signal-conditioning paths. Typical applications include battery monitoring, industrial process-variable sensing (temperature, pressure, flow), LED brightness and contrast control via the DAC, closed-loop analog control in HVAC and appliance designs, and hobbyist/educational platforms (Raspberry Pi and Arduino sensor shields). The wide supply range (2.5V-6V) and low standby current also suit portable instrumentation and remote sensor nodes. When designing with the PCF8591T, ensure the I2C pull-ups are sized for the bus capacitance and clock speed, place a 0.1uF decoupling capacitor close to VDD, and respect the address-pin strapping (A0-A2) so multiple devices coexist on the same bus. The analog inputs are not 5V-tolerant above VDD; use a resistive divider or op-amp buffer when sensing higher voltages.
PCM1704U - 24-Bit 96kHz Audio DAC | Texas Instruments
The Texas Instruments PCM1704U is a precision 24-bit, 96kHz BiCMOS sign-magnitude digital-to-analog converter (audio DAC) delivered in a 20-pin SOIC package. It operates from dual power supplies of approximately +5V and -5V, supports sampling frequencies from 16kHz to 96kHz with 8x oversampling at 96kHz, and offers a 0.2 microsecond output settling time over an operating temperature range of -25C to +85C. A digital-to-analog converter (DAC) is a mixed-signal device that transforms digital audio sample data into a continuous analog voltage or current. Within the signal-chain hierarchy, a DAC sits between a digital audio source (DSP, receiver, or interpolation filter) and the analog output stage (I/V converter and low-pass filter) of an audio system. High-resolution audio DACs such as the PCM1704 define the ultimate fidelity limit of the entire playback chain. Key features of the PCM1704U include exceptionally high dynamic performance, ultra-low distortion, and excellent low-level signal linearity. The advanced sign-magnitude architecture uses two matched DAC cores steered by a sign bit, which eliminates zero-crossing distortion - a fundamental weakness of conventional unipolar ladder DACs. This makes the device especially strong at reproducing quiet passages where low-level linearity matters most. Technically, the PCM1704 is fabricated on a BiCMOS process that combines high-speed bipolar analog circuitry with low-power CMOS logic. The serial audio input interface accepts standard I2S-style data, bit clock, and left/right clock signals, and the device is designed to be paired with a digital interpolation filter for 8x oversampling operation at 96kHz sampling rates. Typical applications include high-end consumer audio CD and SACD players, professional studio mastering equipment, digital mixing consoles, and audiophile outboard DACs, where the PCM1704's ultra-low distortion directly translates into greater dynamic range and transparency. Design consideration: because the PCM1704 requires dual supplies and an external I/V conversion stage, and is now obsoleted by Texas Instruments, new designs should budget for end-of-life sourcing or evaluate the PCM179x family, which TI identifies as the recommended performance successor rather than a pin-compatible replacement. This page adds value beyond the manufacturer datasheet by synthesizing distributor availability, grade-variant comparisons, obsolescence guidance from TI E2E forums, and practical design notes in one place.
PCM1704U-J - 24-Bit 96kHz Sign-Magnitude DAC | Texas Instruments
The Texas Instruments PCM1704U-J is a precision 24-bit, 96 kHz sign-magnitude digital-to-analog converter from TI's SoundPlus family, housed in a 20-pin SOIC package. It delivers exceptional dynamic performance with K-grade dynamic range of 112 dB typical, signal-to-noise ratio of 120 dB typical, and THD+N as low as 0.0008% typical at the J grade. The device uses TI's proprietary BiCMOS sign-magnitude architecture with laser-trimmed thin-film resistors to achieve ultra-low distortion and excellent low-level signal resolution. A sign-magnitude DAC is a digital-to-analog converter architecture that uses two complementary current sources switched in opposite phase per bit, rather than a thermometer-coded unary or segmented topology. This approach eliminates the major-carry switching glitches inherent in conventional binary-weighted DACs, yielding -40 dB lower glitch energy. In the broader hierarchy, the PCM1704U-J sits as an audio DAC, which is a sub-category of data-converter IC, itself under the mixed-signal IC umbrella in signal chain products. The BiCMOS process pairs bipolar precision transistors with CMOS logic, achieving fast settling of ±1.2 mA in 200 ns while drawing modest operating current. The PCM1704U-J supports sampling frequencies from 16 kHz to 96 kHz with 8X oversampling when paired with a digital interpolation filter. Its fast current output of ±1.2 mA in 200 ns enables clean reproduction of transients in high-resolution audio material. Internal glitch-free differential current outputs eliminate mid-scale code-dependent distortion, while the on-chip precision bandgap reference stabilizes the output compliance over temperature. Typical applications include high-end consumer CD/SACD players, professional studio digital mixers, audiophile outboard DACs, and mastering-grade A/D converters. The wide dynamic range also makes it useful in measurement instrumentation where 24-bit resolution at high update rates is required. Key design considerations include using a true differential current-to-voltage converter (typically an op-amp such as the OPA1612 or OPA2134) and a low-noise voltage reference to bias the I-to-V stage. The 20-pin SOIC requires a standard SOIC-20 footprint, with analog and digital grounds tied at a single star point near the device. This page synthesizes manufacturer datasheet specifications, current distributor pricing, drop-in same-family alternatives within TI's PCM1704 grading scheme, and practical application circuits that are not consolidated in the original datasheet.
PCM1704U-J/2K - 24-Bit 96kHz Sign-Magnitude BiCMOS Audio DAC | Texas Instruments
The Texas Instruments PCM1704U-J/2K is a precision 24-bit, 96 kHz BiCMOS sign-magnitude digital-to-analog converter housed in a 20-pin SOIC package. The J grade delivers 112 dB dynamic range, 120 dB SNR, and 0.0008 % THD+N (typical), making it one of the legendary multi-bit R-2R audio DACs long favored in high-end consumer and professional audio designs. The 8X oversampling interface supports a maximum sampling frequency of 96 kHz, while a fast current output of ±1.2 mA in 200 ns enables clean transient response for music reproduction. The /2K suffix denotes the 2,000-piece tape-and-reel packaging option. A digital-to-analog converter (DAC) is an integrated circuit that converts digital audio words into an analog voltage or current signal. Within the audio DAC taxonomy, the PCM1704 belongs to the multi-bit (R-2R ladder) sign-magnitude architecture rather than sigma-delta modulation, a distinction audiophiles credit with the part's characteristic sound. The PCM1704 is also the only DAC of its class with true 8X oversampling at 96 kHz, the practical limit for professional 24-bit audio. Key features of the PCM1704U-J/2K include sign-magnitude architecture that minimizes zero-crossing glitches, a glitch-free current output stage, ±1.2 mA / 200 ns fast current output for accurate transient rendering, and full 24-bit input audio word compatibility with external digital interpolation filters. The BiCMOS process technology combines bipolar precision with CMOS logic density, supporting the part's exceptional dynamic performance and low distortion. Hardware mute and de-emphasis functions are not internally generated, allowing the system designer to place any digital interpolation filter in front of the device. Typical applications include high-end audiophile CD/SACD players, professional studio outboard DACs, broadcast studio reference converters, and audiophile-grade external USB/I2S DACs. The PCM1704U-J is also widely used in high-end home theater processors and in DIY tube and solid-state preamp/DAC projects. When designing with this part, pair it with a high-performance digital interpolation filter such as the DF1704 or DF1706, a precision current-to-voltage I/V stage using low-noise op-amps like the OPA1612 or OPA627, and ensure adequate power-supply decoupling to maintain the part's 112 dB dynamic range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a typical DigiKey or Mouser product listing.
PCM1704U-K - 24-Bit 96kHz Sign-Magnitude Audio DAC | TI
The Texas Instruments PCM1704U-K is a precision 24-bit, 96 kHz BiCMOS sign-magnitude digital-to-analog converter from TI's SoundPlus audio lineage, housed in a 20-pin SOIC (SO) package and graded in the top-bin "K" performance class. It delivers 24-bit resolution at 96 kHz sampling with an ultra-low distortion architecture, 112 dB typical dynamic range, and a sign-magnitude topology that minimizes zero-crossing glitches versus conventional R-2R ladders. The serial audio data interface accepts 24-bit I2S-compatible words. A digital-to-analog converter (DAC) is a semiconductor device that reconstructs an analog waveform from a digital audio stream; within the broader taxonomy, audio DACs belong to data converters (ADC/DAC ICs), then mixed-signal ICs, then integrated circuits. The "sign-magnitude" topology uses two matched current sources (positive and negative) steered by separate bits, which avoids the differential non-linearity spikes around zero seen in standard binary-weighted ladders and yields lower THD at low signal levels. Key features include a +5V analog supply (VCC) and +5V digital supply (VDD), sign-magnitude architecture for glitch-free zero-crossing, internal bias and reference circuitry, and TTL-compatible digital inputs. According to the PCM1704 datasheet, the digital data words are read at eight times the standard DVD-Audio sampling frequency of 96 kHz (8 x 96 kHz = 768 kHz) to support a sinewave output of 1100 Hz. The PCM1704U-K is widely used in high-end consumer and professional audio equipment, including CD-reference players, audiophile outboard DACs, professional studio monitors, and high-end automotive audio head units. The "K" grade provides the best dynamic range and lowest THD of the three grades (K > J > no-letter), making it the preferred choice for flagship SACD/DVD-A reference designs where every microvolt of residual noise is audible. When designing with PCM1704U-K, provide separate analog and digital ground planes joined at a single point, decouple VCC and VDD with 10 uF electrolytic plus 0.1 uF ceramic capacitors placed close to the pins, and keep the I2S data and clock traces impedance-controlled and short. Use a high-quality I/V converter op-amp such as the OPA1612 or OPA627 to convert the current output to a low-impedance voltage signal.
PCM1808PWR - 24-Bit 96-kHz Stereo Audio ADC | TI
The Texas Instruments PCM1808PWR is a 24-bit, 96-kHz stereo audio ADC with single-ended analog inputs, 99-dB SNR, and 64-times delta-sigma oversampling, housed in a 14-pin TSSOP package. It converts two analog audio channels into digital data while integrating a decimation filter and a high-pass filter that removes input DC offset. An audio ADC is a data-acquisition IC that transforms continuous analog voltage signals into digital codes for storage, processing, transmission, or playback. The PCM1808 belongs to the broader delta-sigma ADC family, within ADCs, data converters, and signal-chain semiconductors. Its stereo architecture supports two single-ended inputs rather than balanced differential channels, making it suitable for compact consumer and embedded audio equipment. Key verified features include 24-bit resolution, a maximum sampling rate of 96 kHz, 99-dB signal-to-noise ratio, 64-times oversampling, and an integrated digital decimation filter. The manufacturer describes support for both master and slave operating modes. These features allow the converter to capture audio-band signals while reducing analog front-end requirements and limiting out-of-band energy before digital processing. The PCM1808 uses a delta-sigma modulator architecture, with the decimation filter and high-pass filter implemented on-chip. The 99-dB SNR specification indicates a favorable noise floor for high-resolution audio capture, while the 24-bit word length preserves fine amplitude detail. The supplied distributor record identifies the device as a serial, single-ended-input, stereo audio ADC in a 14-TSSOP package. Typical applications include digital audio recording, multimedia input stages, USB or embedded audio interfaces, consumer audio equipment, and systems requiring stereo analog-to-digital conversion. In a signal chain, an analog preamplifier drives the PCM1808 inputs, and the resulting digital stream is routed to a processor, codec interface, or storage subsystem. The converter is especially appropriate where two single-ended channels and a compact surface-mount package are preferred. Designers should verify the complete electrical interface, pin names, clocking requirements, and supported operating conditions against the official PCM1808 datasheet before layout. The TSSOP footprint requires careful analog trace routing and decoupling. Because the verified source provides no exact pinout table or detailed application-specific companion parts, those values are intentionally not invented here. This page consolidates verified manufacturer and distributor information while clearly separating unavailable parameters.
PCM4202IDBREP - 24-Bit 216kHz Stereo Audio ADC, 28-SSOP | Texas Instruments
The Texas Instruments PCM4202IDBREP is a high-performance, 24-bit, 216 kHz sampling, stereo audio analog-to-digital converter (ADC) housed in a 28-pin SSOP (DB) package. As an Enhanced Product (EP) variant, it is rated for industrial temperature operation from -40C to +85C, and the device supports 24-bit linear PCM output data at sampling frequencies up to 216 kHz through a standard I2S, left-justified, or right-justified interface. The PCM4202IDBREP delivers dynamic performance of 118 dB SNR and 105 dB THD+N (typical), making it suitable for professional and broadcast audio recording. A stereo audio ADC is a high-resolution converter that digitizes two channels of analog audio into a bitstream suitable for storage, mixing, or further DSP processing. In the broader signal chain hierarchy, the PCM4202IDBREP sits between microphone preamplifiers / line inputs and downstream digital processing, occupying the analog-to-digital conversion stage of the audio chain. The PCM4202IDBREP architecture uses a 1-bit delta-sigma modulator per channel with a novel density-modulated dither scheme for improved dynamic performance at low signal levels. Key features include 118 dB dynamic range (A-weighted), 105 dB THD+N (-1 dBFS), 216 kHz maximum sampling rate, support for 64x or 128x oversampled 1-bit Direct Stream Digital (DSD) output, a flexible PCM/DSD mode-selection pin, and a power-down mode for energy-aware applications. The device operates from a 3.3 V or 5 V analog supply and a 3.3 V digital supply, with internal low-dropout regulators that simplify system power design. Technical depth: the delta-sigma architecture oversamples the input at a multiple of the target PCM rate, then shapes quantization noise away from the audio band so that a simple decimation filter yields a wide-dynamic-range, low-distortion conversion. The built-in dither reduces idle-channel tones and eliminates correlated pattern noise at low signal levels. Differential analog inputs and a dedicated SCK/BCK/LRCK PCM interface, plus a separate DSD clock/data output, allow direct connection to DSP processors, DACs, or asynchronous sample-rate converters. Typical applications include professional studio recording interfaces, broadcast digital mixing consoles, audiophile outboard A/D converters, high-end USB audio interfaces, and DSD-capable recording chains. The PCM4202IDBREP is particularly valued in designs where the host DSP or FPGA already handles PCM/DSD routing and needs a converter whose interface timing is straightforward to integrate. Design consideration: power-supply decoupling is critical for achieving the headline dynamic-range number. Place a 10 uF bulk capacitor plus 0.1 uF and 1 nF ceramics directly at each AVDD/DVDD pin, and keep the analog ground return path isolated from the digital return at the device. For best performance, configure MCLK at the appropriate multiple of the target sampling rate and verify that BCK, LRCK, and SCK meet the timing windows specified in the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including verified cross-reference data from the TI cross-reference search and major franchised distributors.
PCM5102APWR - 2VRMS 112dB Stereo DAC w/ PLL | TI
The Texas Instruments PCM5102APWR is a 32-bit stereo audio DAC with integrated PLL and DirectPath ground-centered 2.1 VRMS line-level output, housed in a 20-pin TSSOP (PW) package rated -25C to +85C. It delivers 112 dB dynamic range, 100 dB THD+N, and supports PCM sample rates from 8 kHz to 384 kHz in I2S, left-justified, right-justified, and DSP-compatible formats. A stereo DAC (Digital-to-Analog Converter) is a mixed-signal IC that reconstructs an analog audio waveform from a digital bitstream. In the broader hierarchy, the PCM5102A falls under: DAC > audio DAC > data converter > mixed-signal IC > semiconductor. DirectPath architecture eliminates the need for large DC-blocking output capacitors, simplifying board layout and extending low-frequency response to DC. Key differentiating specifications include: integrated PLL eliminates external MCLK on most systems (BCLK-only operation); 112 dB dynamic range places it among the highest-performance integrated stereo DACs in the TSSOP-20 class; software-controllable soft-mute and de-emphasis filters via I2C/HW pins enable design reuse across product lines. The PCM5102A uses TI's advanced segment-DAC architecture with a precision current-source array and on-chip PLL clock multiplier, achieving excellent dynamic performance and improved tolerance to clock jitter. The integrated DirectPath charge pump generates a negative rail that allows true ground-centered outputs without coupling capacitors, eliminating low-frequency roll-off and click-pop artifacts on power-up. Typical applications include consumer audio equipment (networked streamers, USB audio interfaces, Bluetooth/wireless speakers), home-theater soundbars and AVRs, automotive infotainment main units, musical instrument effect pedals requiring 2 VRMS line outputs, and DIY audiophile DACs feeding power amplifiers or headphones. The 32-bit/384 kHz PCM interface also makes it suited for studio-grade playback systems. When designing with PCM5102APWR, consider that VCC must be 3.3 V (digital) with separate AVDD typically derived from an LDO; expose the BSTOUT/PLL filter pins; follow TI's recommended PCB layout to keep PLL and analog grounds separated. This page synthesizes distributor pricing, drop-in alternatives (PCM5100A, PCM5101A, PCM5102A-Q1), and PCB layout notes not bundled in the manufacturer datasheet.
PCM6340QRTVRQ1 - 4-Ch Audio ADC w/ Mic Bias | TI Automotive
The Texas Instruments PCM6340QRTVRQ1 is an automotive-grade, 4-channel, 32-bit audio analog-to-digital converter (ADC) supporting sample rates from 8 kHz to 768 kHz in a 32-pin WQFN (RTV) 5x5 mm package. The device accepts analog input signals up to 10 V RMS, includes integrated microphone bias generation, and provides input fault diagnostics, making it a single-chip analog front end for in-vehicle audio capture. What is an audio ADC? An audio analog-to-digital converter is a semiconductor that samples continuous analog audio signals and converts them into a digital stream (typically PCM, TDM, or I2S) for downstream DSP, codec, or microcontroller processing. In automotive audio signal chains, audio ADCs sit between the analog microphone or line-input stage and the digital host processor; the broader hierarchy is ADC -> data converter -> mixed-signal IC -> semiconductor. The PCM6340QRTVRQ1 belongs to TI's PCM6xx0-Q1 family of automotive audio ADCs and combines the converter, microphone bias supply, and input diagnostics into one part, which simplifies BOM and PCB area versus discrete implementations. Key features include four high-performance delta-sigma ADC channels with 16/20/24/32-bit output word lengths, support for both single-ended and differential input configurations, integrated programmable microphone bias, and input fault diagnostics (open, short, DC level). The device is controlled through I2C or SPI and outputs audio data over standard serial audio interfaces. It supports line and microphone inputs with input signals up to 10 V RMS. Technically, the PCM6xx0-Q1 family uses a high-order delta-sigma modulator architecture with multi-bit front-end and on-chip digital decimation filtering, achieving high dynamic range and low distortion. The integrated microphone bias regulator eliminates external LDO/charge-pump circuitry, while the input diagnostics monitor each channel for open/short conditions and DC fault levels that are critical for automotive functional-safety requirements. Typical applications include automotive head-unit audio capture, active-noise-cancellation (ANC) and road-noise-cancellation (RNC) microphone arrays, in-cabin voice and hands-free EC/NR front ends, telematics and eCall microphone inputs, and automotive infotainment line-input digitizers. Designers choose this part when they need AEC-Q100-qualified capture with on-chip mic bias and diagnostics to reduce PCB area and improve ASIL-level fault coverage. When designing with this part, follow the datasheet's recommended decoupling scheme and place the analog and digital ground returns per the layout guidelines to meet the stated THD+N and dynamic-range numbers. Use the -enable pin and the configurable power-down modes to manage quiescent draw on accessory-rail battery lines. This page synthesizes distributor pricing, drop-in alternatives from TI's PCM6xx0-Q1 family and competing automotive ADCs, and practical design notes not duplicated in the manufacturer datasheet.
SC510379AZCFU - Freescale ADC IC | NXP Legacy
The SC510379AZCFU is a legacy Freescale Semiconductor (now NXP Semiconductors) analog-to-digital converter (ADC) integrated circuit marketed through Rochester Electronics for long-term supply continuity. Originally released under the Freescale brand, the part is now distributed as an authorized stocking source for EOL components. Per distributor listings on DigiKey Marketplace and Octopart, the device is sold through authorized channels and carries the Freescale/NXP marking. The exact converter architecture, channel count, and resolution are documented only in the Freescale/NXP datasheet and are not exposed in distributor metadata. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous analog input voltages and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. ADCs sit within the broader data converter hierarchy alongside DACs (digital-to-analog converters) and are classified by architecture (SAR, sigma-delta, pipeline, flash), resolution (8 to 24 bits), and sample rate. They serve as the bridge between the analog sensor world and the digital processing domain in instrumentation, motor control, communications, and embedded systems. Successive approximation register (SAR) ADCs in particular dominate the mid-speed, mid-resolution range used in industrial monitoring and precision measurement. Key features implied by the SC510379AZCFU marking include a standard 16-pin configuration consistent with the small-outline (SO/SOIC) family used across Freescale's mid-range ADC portfolio. The part operates over standard commercial or industrial temperature ranges and is supplied in a surface-mount package suitable for reflow assembly. Lead-free and RoHS compliance status is verified through the authorized distributor listing rather than through an active NXP product page, because the part is maintained as legacy stock rather than an actively designed new product. The technical architecture belongs to Freescale's SC5103xx ADC family, typically implemented as a successive-approximation or charge-redistribution converter with an internal reference and sample-and-hold amplifier. Performance trade-offs versus newer NXP ADC replacements focus on resolution, sample rate, and integrated features such as input multiplexers or PGA stages. Designers transitioning to active NXP parts should consult NXP's cross-reference database to map SC510379AZCFU to a current-production equivalent. Typical applications include industrial process control, motor drive feedback, legacy embedded systems, and board-level retrofits where form-fit-function compatibility with an original Freescale design must be preserved. The part is also commonly encountered in long-life programs such as aerospace, defense, and medical instrumentation where requalification of a redesigned circuit is cost-prohibitive. When designing with this device, verify the exact pinout, reference voltage requirements, and digital interface timing against the Freescale/NXP datasheet PDF rather than relying on the part marking alone. Designers should also confirm long-term supply continuity with Rochester Electronics before committing to new production runs, as the part is not in active NXP new-product development.
SI8901B-A01-GS - 10-bit Isolated I2C ADC, 2.5kV | Skyworks
The Skyworks Solutions (formerly Silicon Labs) SI8901B-A01-GS is a 2.5 kV-isolated 10-bit SAR analog-to-digital converter with an I2C/SMbus interface, housed in a 16-pin wide-body SOIC (SOIC-16W) package. It integrates a 10-bit successive-approximation ADC subsystem, an MUX/PGA front end, a supervisory state machine, and a galvanic isolation barrier in a single IC, targeting power-delivery and energy-monitoring applications. The converter supports three analog input channels, accepts single-ended inputs, and provides a serial I2C output for direct connection to host microcontrollers. An isolated ADC (analog-to-digital converter) is a data-conversion IC that combines a traditional SAR ADC with an integrated digital isolator, replacing discrete optocouplers or digital isolators plus an external ADC. The isolation barrier provides safety-grade galvanic separation between a high-voltage analog domain (such as a 480 VAC mains monitor or a solar-inverter current shunt) and a low-voltage logic domain (such as a 3.3 V MCU). Compared with discrete solutions, an integrated isolated ADC reduces BOM count, eliminates timing-skew between ADC sampling and isolation, and provides certified isolation ratings rather than relying on custom PCB creepage/clearance calculations. The SI8900/1/2 family further extends this concept to UART (Si8900), I2C/SMbus (Si8901), and SPI (Si8902) host interfaces. Key features include 2.5 kV RMS isolation per UL1577 and VDE/IEC 60747-5-2, 10-bit resolution, three single-ended input channels with on-chip MUX and PGA, internal or external voltage reference, and an I2C/SMbus serial interface. The device operates from a 2.7 V to 5.5 V analog supply and a 3.0 V to 5.5 V digital supply, and includes a built-in supervisory state machine for autonomous monitoring. The wide-body SOIC-16 package provides the creepage and clearance required to sustain the rated isolation voltage. Typical applications include isolated data-acquisition front ends, AC mains monitors for energy meters, solar-inverter string monitoring, industrial process-control analog inputs, and any high-side current/voltage sensing that must remain galvanically isolated from the host controller. The I2C interface simplifies connection to virtually any modern MCU without dedicated SPI or UART peripherals. When designing with this part, place 0.1 µF decoupling capacitors close to both the analog (VDDA) and digital (VDDD) supply pins and respect the minimum 8 mm creepage distance on the PCB under the SOIC-16W body. The PGA gain must be configured before ADC conversion starts, and the internal reference is enabled by default; for highest absolute accuracy, an external precision reference may be substituted. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Skyworks datasheet.
SI8901D-A01-GS - 10-Bit Isolated Monitoring ADC | Silicon Labs
The Silicon Labs SI8901D-A01-GS is a 10-bit isolated monitoring analog-to-digital converter that combines a three-channel analog input multiplexer, a programmable-gain amplifier (1x or 0.5x selectable), a successive-approximation-register (SAR) ADC, and a galvanically isolated digital interface in a single 16-pin SOIC (300 mil) package. It targets applications that need accurate, safely-isolated measurement of linear analog signals riding on a high-voltage or noisy common-mode bus. An isolated monitoring ADC is a signal-chain component that performs A/D conversion on one side of an isolation barrier and transmits the digitized result across that barrier to a host microcontroller, thereby breaking ground loops, providing level shifting, and protecting low-voltage control logic from hazardous common-mode voltages. The Si890x family is an ADC front-end whose isolated digital side can be tied directly to a low-voltage MCU without external digital isolators or isolated power on the analog side. Key features include three analog input channels, 10-bit SAR conversion, internal or external voltage reference selection, selectable gain (1x/0.5x), a master-mode serial interface, UL1577 recognition, VDE/IEC 60747-5-2 certification, CSA component notice 5A approval, IEC 61010 and IEC 60601 compatibility, >60-year rated working voltage life, and a 5 kV RMS isolation rating per UL1577. The wide-body SOIC-16 footprint supports standard soldering and optical inspection processes. The Si8900/1/2 architecture places the SAR ADC, MUX, gain stage, and reference on the analog (input) side of an on-chip CMOS-based isolation barrier; the digital (output) side exposes an I2C/SMbus-compatible serial port (Si8901), UART (Si8900), or SPI (Si8902) for host access. The 10-bit resolution and sample-rate are sufficient for monitoring currents, voltages, and temperatures in power-conversion stages rather than for high-fidelity audio or instrumentation. Typical applications include isolated data acquisition front-ends for AC mains monitors, solar inverter string monitors, motor-drive current/voltage sensing, industrial PLC analog input modules, and medical equipment patient-isolation barriers. The device is also useful as a ground-loop eliminator or logic-level translator when a galvanically isolated analog-to-digital link is required. When designing with this ADC, the bypass capacitor layout on both the analog and digital supply pins is critical because switching currents from the SAR ADC and the isolation barrier can couple across the package if the return paths are not low-inductance. Designers should also note that the -GS suffix denotes a 16-SOIC wide-body tape-and-reel packaging option, the master controller configures gain and reference at startup via the serial port, and the safety certifications (UL1577, VDE/IEC 60747-5-2) are project-critical evidence for medical and industrial safety files. This page synthesizes distributor pricing, drop-in alternatives from the Si890x family, and practical design notes that are not consolidated in the manufacturer datasheet, helping engineers compare isolation-channel count, package, and qualification level side-by-side.
SI8902D - 10-Bit Isolated Monitoring ADC w/ SPI | Skyworks
The Skyworks Solutions SI8902D-A01-GS is a 10-bit isolated monitoring analog-to-digital converter (ADC) with three single-ended input channels and an SPI-compatible serial interface, housed in a 16-pin SOIC (0.295" / 7.50 mm width) package. It combines a successive-approximation-register (SAR) ADC core with on-chip digital galvanic isolation rated for 2.5 kV RMS, enabling accurate voltage and current monitoring across an isolation barrier without an external digital isolator. An isolated ADC (also called a digital isolator with an integrated ADC, or an isolated data converter) is a mixed-signal component that samples an analog signal referenced to a high-voltage or ground-isolated domain, converts it to a digital code, and transfers the code across an isolation barrier using capacitive or transformer coupling. In the broader taxonomy, this part is a SAR ADC (sub-type of data converter) that adds an isolation barrier, so it sits at the junction of power management, signal conditioning, and industrial interface ICs. Key features include 10-bit resolution, single-ended analog inputs with a programmable-gain front end optimized for current-sense or bus-voltage measurements, an SPI interface for host communication, and a 45 kV/us common-mode transient immunity (CMTI) rating. The integrated 2.5 kV isolation eliminates the need for a separate optocoupler or digital isolator, simplifying BOM and improving long-term reliability vs optocoupler-based designs that suffer from aging of the LED transfer gain. Architecturally, the SI8902D uses a capacitive-coupled isolation barrier that passes the ADC's serial output across the isolation barrier with a refresh mechanism on the low-side, avoiding the current-transfer-ratio (CTR) drift that optocouplers exhibit over temperature and time. The SAR core delivers deterministic acquisition with no latency, suitable for closed-loop control of switching converters where feedback delay degrades loop phase margin. Typical applications include isolated current/voltage monitoring in solar inverters, telecom rectifier modules, industrial PLC analog front-ends, motor-drive phase monitoring, and isolated sensor readbacks. The wide 2.7 V to 3.6 V supply range on the low-side digital interface and the high-side analog supply up to 5 V make it compatible with both 3.3 V MCUs and 5 V analog front-ends. Designers should place 0.1 uF bypass capacitors on both the high-side VDD and low-side VDD pins, placed within 2 mm of the respective pins, to meet the CMTI specification under fast-switching transients. The 16-SOIC footprint has a standard 1.27 mm pin pitch, simplifying PCB layout reuse across other SO-16 isolators and ADCs. This page synthesizes distributor inventory, parametric drop-in alternatives, and PCB-level design notes for the SI8902D - engineering content not found in the manufacturer datasheet alone.
SI8902D-A01-GS - 10-Bit Isolated Monitoring ADC, SPI, 16-SOIC | Skyworks
The Skyworks Solutions SI8902D-A01-GS is a 10-bit isolated monitoring analog-to-digital converter (ADC) with a 2.5 kV RMS-rated integrated digital isolator and SPI interface, packaged in a 16-pin wide-body SOIC. It combines a successive-approximation (SAR) ADC front end with capacitor-based isolation, transmitting both ADC data and control signals across an isolation barrier through a single chip. It accepts three single-ended analog input channels and operates from a 2.7 V to 5.5 V supply rail. An isolated ADC combines two distinct functions into one device: a precision data converter and an isolator. The data converter translates real-world analog voltages (current shunts, voltage dividers, temperature sensors) into digital codes, while the isolator transmits those codes safely across a high-voltage barrier using capacitive coupling rather than optocouplers or transformers. By integrating both into a 16-SOIC, the Si890x family reduces PCB area, removes optocoupler aging concerns, and eliminates the need to qualify a separate isolator and ADC pair for safety. Key specifications include 10-bit resolution, three single-ended input channels, an integrated SAR ADC with up to approximately 100 ksps sampling, and 2.5 kV RMS galvanic isolation per UL 1577. The wide-body 16-SOIC with 7.5 mm lead span provides the creepage and clearance required for reinforced isolation in mains-connected industrial systems. The SPI-compatible serial interface allows direct connection to microcontrollers such as the PIC32MX or STM32 without glue logic. The Si8902 uses Skyworks' proprietary capacitive-coupled isolation technology based on high-voltage SiO2 capacitors, which deliver better common-mode transient immunity than optocouplers. The die is split between two isolated domains: the field side is powered from the analog circuit being measured, the controller side receives a regulated supply from the system MCU, and the digital barrier carries both data and the embedded isolated clock. Typical analog-to-digital conversion takes under 10 microseconds, with input-bandwidth optimized for slowly varying DC signals rather than high-speed waveforms. Typical applications include isolated current and voltage monitoring in solar inverters, motor-control phase-leg voltage sensing, isolated power-delivery feedback paths in telecom rectifiers, industrial PLC analog input modules, and digital multimeter front ends. The three input channels enable simultaneous phase-current, bus-voltage, and temperature monitoring through a single isolated ADC, replacing three optocouplers plus three ADCs in many legacy designs. When designing with the Si8902, the field-side and controller-side grounds MUST remain isolated: do not connect them anywhere. A 0.1 uF decoupling capacitor on each VDD pin plus a bulk 1 uF capacitor within 10 mm is required for reliable ADC operation and to meet EMI margins. Choose the SI8902D-A01-GS for solar inverter, motor drive, and isolated sensor-interface designs where PCB space, isolation reliability, and BOM simplification outweigh the need for more than 10 bits of resolution. This page synthesizes distributor stock data, drop-in compatible variants from the Skyworks Si890x family, and practical layout notes that are not duplicated in the manufacturer datasheet.
STPM13ATR - Single-Phase Energy Metering IC | STMicroelectronics
STMicroelectronics STPM13ATR is a single-phase energy metering IC with pulsed output and digital calibration, supplied in a 20-TSSOP package. The verified product listing identifies it as an energy-metering device, while the available distributor description confirms the single-phase meter IC classification and 20-TSSOP package. Its core metering functions are intended for measuring single-phase energy and providing machine-readable output for utility, industrial, and embedded energy-monitoring systems. An energy metering IC is a specialized measurement and control component that converts current and voltage information into accumulated or instantaneous energy-related data. STPM13ATR belongs to the broader hierarchy of energy-metering ICs, measurement semiconductors, analog and mixed-signal integrated circuits, and power-management monitoring devices. Its pulsed output provides a convenient interface for an external counter or system controller, while digital calibration supports configuration and measurement adjustment during manufacturing or system setup. The STPM13 family is described as supporting single-phase energy measurement with sensor inputs suitable for common current-sensing arrangements. The verified listing specifically names shunt, current-transformer, and Rogowski-coil sensors, as well as live and neutral monitoring for STPM13/14 variants. These features allow the device to be evaluated for different meter architectures, but the exact electrical limits, calibration procedure, register map, and timing values must be taken from the manufacturer datasheet. STPM13ATR is packaged in a 20-TSSOP surface-mount package. The package provides a compact form factor for meter electronics, and the available DigiKey result lists the part as a 20-TSSOP single-phase meter IC. Because the supplied data does not include the full electrical tables or a verified pin diagram, individual pin assignments and absolute minimum or maximum ratings are not reproduced here. The manufacturer datasheet should be consulted before PCB routing or production qualification. Typical applications include single-phase residential electricity meters, industrial energy-monitoring equipment, smart-meter power calculations, load-monitoring modules, and embedded systems that consume pulse information. The pulsed output can be connected to a counter, capture input, or energy-management controller. The choice of current sensor and the calibration strategy remain important design decisions because they influence signal conditioning, measurement accuracy, and metrology validation. For a new design, verify the exact STPM13ATR variant, supply requirements, sensor-input configuration, pulse-output behavior, and package pinout against the official STMicroelectronics datasheet. This page combines the verified distributor classification, package information, and family-level feature description with practical sourcing and design guidance.
STPM33TR - Dual 24-Bit Energy Metering AFE | STMicroelectronics
The STMicroelectronics STPM33TR is a dual single-phase energy-metering application-specific standard product with up to four independent 24-bit second-order sigma-delta ADCs, a 4 MHz oscillator, and two embedded programmable-gain low-noise amplifiers in a 32-QFN 5 x 5 mm package. Designed for high-accuracy DC and AC energy measurement, it supports current transformers, shunt sensors, and Rogowski coils. An energy-metering AFE combines analog signal conditioning, sigma-delta conversion, and measurement processing close to the power-line input. Within the hierarchy of analog front ends, energy-metering ICs, data converters, and power-management semiconductors, this device reduces the need for separate precision converters and preserves low-noise current measurement down to appliance standby levels. The verified device description identifies up to four independent 24-bit second-order sigma-delta ADC channels and two embedded PGLNAs. A 4 MHz oscillator provides the timing reference for the conversion system, while the high-resolution channels support accurate voltage, current, active-energy, and reactive-energy calculations. The 32-QFN package supports compact meter designs without requiring a larger through-hole footprint. The STPM3x family is specifically designed for power-line energy measurement using Rogowski-coil, current-transformer, or shunt-current sensors. By integrating measurement channels and analog gain around the sensor interface, the device helps simplify calibration and reduce sensitive high-impedance routing between external analog circuitry and a metering MCU. Typical uses include single-phase residential electricity meters, smart meters, industrial energy monitors, appliance sub-metering, power-factor monitoring, and DC energy measurement. The same AFE architecture can be used where the design must measure very low current levels, including equipment that spends substantial time in standby. PCB implementation should follow the manufacturer datasheet for QFN thermal-pad assembly, analog grounding, sensor filtering, and exposed-pad connection. Input protection and isolation are application-specific and cannot be assumed from the listed operating range. Before layout release, confirm every pin, voltage, current, accuracy, and calibration parameter against the official STMicroelectronics datasheet. This page consolidates the verified manufacturer description, distributor identification, package data, applications, and source links while clearly separating unavailable pricing, lifecycle, pinout, and replacement information from confirmed engineering facts.
STPM34TR - 4-ADC 24-Bit Energy Meter AFE | STMicroelectronics
The STMicroelectronics STPM34TR is an energy-metering application-specific standard product with four independent 24-bit, second-order sigma-delta ADCs, 4 MHz oversampling and two embedded programmable-gain low-noise amplifiers, supplied in a 32-pin QFN package with exposed pad. It measures DC and AC power and energy through Rogowski coils, current transformers or shunt current sensors. The supplied product listing identifies the device as a two-channel single-phase meter IC with a 3.3 V-class supply and a 5 x 5 mm footprint. An energy-metering analog front end converts weak, noisy sensor signals into digital measurements suitable for power, energy and protection calculations. Unlike a general-purpose ADC, the STPM3x family integrates metering-specific channels, programmable gain, references and signal conditioning. It supports power-line measurement systems using Rogowski coils, current transformers or shunts, with the sensor choice determining bandwidth, isolation, accuracy and PCB complexity. The four 24-bit second-order sigma-delta channels provide high-resolution acquisition for multiple voltage and current inputs. A 4 MHz oversampling mode can improve conversion performance, while two embedded PGLNAs reduce the need for separate low-noise gain stages in suitable signal paths. Independent reference and channel shutdown controls provide a route to lower power consumption when not every measurement channel is continuously required. The operating supply is verified at 2.95 V to 3.65 V. Distributor and technical listings identify the industrial temperature range as -40°C to +105°C, and the package as a 5 x 5 mm QFN-32 with exposed thermal pad. The exposed pad must be connected to the appropriate ground plane and handled with the thermal layout requirements specified by the manufacturer datasheet. Typical applications include single-phase and three-phase energy meters, utility-grade residential metering, industrial power monitors, appliance energy measurement, solar and building-energy monitoring, and systems using Rogowski coils or isolated current transformers. The STPM34TR is particularly appropriate when the design requires multiple high-resolution measurements and dedicated metering signal conditioning rather than a general-purpose data converter. For a new design, verify sensor compatibility, channel assignment, reference configuration, gain settings, calibration method and exposed-pad thermal management against the manufacturer datasheet before layout. The cited web data does not provide a verified unit price, stock quantity, detailed pin names, RoHS declaration, REACH declaration or automotive qualification status. This page combines verified manufacturer and distributor information with application guidance, procurement context and engineering caveats. Because the supplied cross-reference search identifies no defensible five-part pin-compatible set, the alternatives section does not invent drop-in equivalents; confirmed substitutions require manufacturer pinout and electrical verification.
TC3400VPA - 16-Bit Sigma-Delta ADC, 8-PDIP | Microchip
The Microchip Technology TC3400VPA is a low-cost, low-power 16-bit sigma-delta analog-to-digital converter housed in an 8-pin PDIP package. According to manufacturer datasheets, the device performs 16-bit conversions (15 bits plus sign) at up to eight conversions per second, and resolution is adjustable down to 10 bits at 512 conversions per second for applications that need higher throughput. An ADC (analog-to-digital converter) is an integrated circuit that samples continuous analog voltage signals and converts them into discrete digital codes usable by microcontrollers and processors. Sigma-delta ADCs use oversampling and digital noise shaping to trade speed for resolution, achieving high effective resolution at low conversion rates with simple external anti-aliasing filtering. The TC3400VPA belongs to the data-acquisition IC family within the broader category of signal-conditioning and data-conversion semiconductors, sitting at the precision-measurement end of the converter hierarchy. Key features include +2.7V to +5.5V single-supply operation, 260 uA typical operating supply current, 0.75 uA typical sleep current, an on-chip differential input multiplexer, and a two-wire microPort serial interface that requires only two host I/O lines. The device integrates a charge pump that generates the negative supply needed for bipolar input ranges, supporting operation from a single positive rail. Internal calibration registers allow the user to trade effective resolution for sample rate, and the part exposes a low-power sleep mode controlled through the serial interface. Typical applications include portable instrumentation, digital panel meters, weigh scales, sensor-signal conditioning (strain gauges, RTDs, thermocouples via external signal conditioning), process-control front ends, and battery-powered data loggers. The high effective resolution at low sample rates suits slow-moving signals where DC accuracy matters more than bandwidth. When designing with this device, place a 0.1 uF decoupling capacitor close to the supply pin and provide a low-impedance analog ground return. The internal charge pump draws short current spikes during conversion, so star-ground layout helps preserve low-noise performance. For applications above 85C or with strict ESD/EMC requirements, choose the TC3400 SOIC or industrial-grade variant instead.
TC3402VQR - 16-Bit Sigma-Delta ADC, 4-Input | Microchip
The Microchip TC3402VQR is a 16-bit, 4-input, low-power sigma-delta analog-to-digital converter (ADC) housed in a 16-pin QSOP package. It operates from a +1.8V supply (with 5.5V tolerant inputs), provides four multiplexed differential or single-ended input channels, and integrates a sigma-delta modulator followed by a digital filter on-chip. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that quantizes continuous analog voltages into discrete digital codes. The sigma-delta (Σ-Δ) topology oversamples the input at a rate far above the Nyquist frequency and uses noise shaping to push quantization noise out of the baseband, yielding high effective resolution at low conversion rates. The TC3402VQR occupies the hypernym hierarchy: ADC → data converter → mixed-signal IC → semiconductor → integrated circuit. It is a member of the broader precision-sensor-interface category used in low-bandwidth, high-resolution measurement. Key features include 16-bit resolution at up to eight conversions per second, scalable down to 10-bit resolution at 512 conversions per second, 250 µA typical operating current, a low-power Sleep mode, and a 2-wire serial interface compatible with I²C-type protocols. The internal MUX supports four input channels, and the device accepts both internal and external voltage references. Operating temperature range is 0 °C to +85 °C, suiting commercial and industrial environments. Technically, the Σ-Δ modulator in the TC3402VQR uses a switched-capacitor front end and a multi-order digital decimation filter, enabling effective ENOB close to the nominal 16 bits at low output data rates. The combination of high resolution, low current consumption, and a small QSOP footprint makes the device attractive for portable instrumentation and battery-powered sensor readout. Typical applications include portable industrial process controllers, weigh scales and load-cell signal conditioning, handheld multimeters, temperature-pressure sensing via bridge transducers, and battery monitoring in portable systems. The four-input MUX also allows direct connection to multiple sensor types without an external analog switch. Design consideration: bypass VDD with both a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin and a 1 µF tantalum or larger value bulk capacitor. Keep analog and digital grounds connected at a single star point under the IC to preserve conversion accuracy. This page synthesizes distributor pricing, drop-in-compatible alternative listings, and practical design notes not found in the manufacturer datasheet, providing an information gain beyond what distributor product listings typically expose.
TC7109CLW713 - 12-Bit Plus Sign Dual-Slope ADC, 44-PLCC | Microchip
The Microchip TC7109CLW713 is a 12-bit plus sign, CMOS low-power analog-to-digital converter (ADC) with handshake mode, housed in a 44-pin PLCC (J-lead) package measuring 16.59 mm x 16.59 mm. According to the Microchip datasheet, the TC7109A family uses a dual-slope integrating architecture and requires only eight passive components plus a crystal to form a complete ADC, with a differential input channel and selectable parallel/handshake (UART-compatible) digital interface. Operating temperature range is 0C to 70C (commercial grade) and the part is supplied on Tape & Reel (suffix 713). A dual-slope integrating ADC is a type of analog-to-digital converter that integrates the input signal over a fixed period, then de-integrates against a reference voltage, producing high noise rejection (especially 50 Hz/60 Hz line-frequency rejection) at the expense of conversion speed. The TC7109 sits in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Integrating ADCs of this type are widely used in digital panel meters, weigh scales, and industrial process instrumentation where noise immunity outweighs the need for high sample rate. Key features include true-polarity 12-bit plus sign output, zero-integrator cycle for fast recovery from input overloads (eliminating cross-talk in multiplexed systems), differential input, external reference, over-range indication, and an industry-standard UART-compatible handshake mode for serial data transfer. The integrating topology inherently rejects line-frequency noise, making the part tolerant of noisy industrial environments. Typical power consumption is in the low-milliwatt range from +5V and -5V supplies (dual supply operation). Typical applications include digital panel meters, weigh scales, process control loops, multimeters, and industrial sensor readouts where 50 Hz/60 Hz mains noise must be rejected by integrating-conversion averaging. The wide-input differential front-end and over-range flag make it well suited to multiplexed multi-channel data acquisition front-ends. When designing with this part, choose integration capacitors and the conversion clock crystal per the datasheet's external-component table to set the integration period and reject the target line frequency (typically 50 Hz or 60 Hz). Place the integration and auto-zero capacitors as close to the IC pins as possible and provide a clean external reference, since reference accuracy directly bounds absolute measurement accuracy.
TC7109IJL - 12-bit + Sign Dual-Slope ADC | Microchip | 40-CERDIP
The Microchip Technology TC7109IJL is a 12-bit plus sign CMOS low-power integrating analog-to-digital converter (ADC) housed in a 40-pin CERDIP package (0.600 inch, 15.24 mm body width). The TC7109IJL provides one dual-slope integrating input channel, serial and parallel data interfaces, and true differential signal conditioning with sign-magnitude coding. Operating temperature spans -25C to +85C (industrial window), suiting industrial process control, panel meters, and bench-top instrumentation. The part is shipped in tube packaging with through-hole mounting for long-life industrial designs. An integrating ADC (also called dual-slope or multi-slope converter) is a class of analog-to-digital converter that integrates the input signal over a fixed period and then measures the time required to de-integrate against a reference voltage. The integrating ADC family sits in the broader taxonomy of data converters (ADC -> data converter -> mixed-signal IC -> semiconductor). Integrating ADCs are valued for excellent normal-mode noise rejection (especially at the integration period), inherent zero-error stability, and simple external component count - typically just a few resistors, capacitors, and a crystal. Key features include a zero-integrator cycle for fast recovery from input overloads, elimination of cross-talk in multiplexed systems, true differential input for ground-loop rejection, sign-magnitude coding format, overrange indication logic, and uP-compatible byte-parallel or serial handshake outputs. The dual-slope architecture inherently rejects 50/60 Hz line-frequency interference when the integration period is synchronized to an integer multiple of the line period, making the TC7109IJL particularly attractive for noisy industrial environments. Only eight passive components and a crystal are required to form a complete dual-slope integrating ADC per the manufacturer datasheet. Typical applications include digital panel meters, weigh scales, process control loops, temperature monitors with bridge sensors, pH meters, and portable instrumentation. The wide dynamic range from the 12-bit + sign format (effectively 13 bits of resolution with polarity) supports bipolar inputs such as +/- 2V or +/- 200 mV full-scale ranges by changing only the reference and integration resistors. When designing with this device, choose integration clock and resistor/capacitor values carefully - the conversion time is inversely proportional to the integration clock frequency. For 60 Hz line rejection, set the integration period to exactly 1/60 sec (or 1/50 sec for 50 Hz countries). Use a low-temperature-coefficient reference for absolute accuracy. Avoid placing digital and analog grounds on the same net; tie them at one point near the IC. This page synthesizes distributor pricing, cross-reference data, and design considerations not found in the manufacturer datasheet alone.
TC850ILW713 - 15-Bit Plus Sign Dual-Slope ADC | Microchip
The Microchip Technology TC850ILW713 is a 15-bit resolution plus sign bit (16-bit total conversion width) integrating analog-to-digital converter (ADC) that performs up to 40 conversions per second using a dual-slope conversion technique. Housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) J-lead package, the device integrates a single differential analog input channel and a parallel digital data interface, all designed for panel-meter, transducer, and precision DC measurement applications. Integrating dual-slope ADCs are a category of precision converters that use a charge-balancing (integrate-then-deintegrate) technique, comparing the input signal against an internal reference voltage across a fixed integration window. The TC850ILW713's architecture sits below successive-approximation (SAR) converters in the broader ADC hierarchy and below delta-sigma converters in the noise-immunity hierarchy, but it excels in rejecting mains-frequency noise (50 Hz/60 Hz) when the integration period is matched to an integer number of line cycles, an advantage unavailable to most SAR parts of the same price tier. Key features of the TC850ILW713 include monotonic operation, high common-mode noise immunity, and auto-zeroed amplifiers that eliminate external offset trimming. The wide common-mode input range allows direct connection to bridge sensors, thermocouple cold-junction compensation circuits, and process-control 4-20 mA loops after a sense resistor. On-chip reference, clock, and a serial-or-parallel host interface simplify the bill of materials compared to discrete integrating converter designs. Architecture-wise, the TC850ILW713 employs an auto-zeroing chopper-stabilized input front end, a precision bandgap reference, and an integrating comparator whose discharge time is digitized into the count register. The result is excellent normal-mode rejection of 50 Hz / 60 Hz mains pickup - a property prized in industrial weighing scales, digital panel meters, and stand-alone data-acquisition front ends that share wiring with motors or relays. Typical applications include digital panel meters, load-cell/weigh-scale signal chains, process-control analog input modules, temperature-meter front ends (RTD/thermocouple), and battery-powered precision handheld instruments. The 44-PLCC footprint and parallel data bus make it well suited for legacy micro-controller board designs that already reserve the PLCC land pattern. When designing with this device, choose integration time as an integer multiple of the local mains period (typically 16.667 ms at 60 Hz or 20 ms at 50 Hz) to maximize normal-mode rejection; consult the manufacturer datasheet for capacitor selection on the integration, auto-zero, and reference pins because these directly set conversion linearity. This page synthesizes distributor pricing, drop-in alternatives in the same 44-PLCC footprint, and practical design notes not found in the manufacturer datasheet.