ADC/DAC
Products (2518)
AMC1336DWVR - ±1V Reinforced Isolated Delta-Sigma Modulator | TI
The Texas Instruments AMC1336DWVR is a precision, reinforced-isolated delta-sigma (ΔΣ) modulator with a ±1-V differential input range and a capacitive double isolation barrier rated up to 8000 VPEAK, housed in an 8-pin wide-body SOIC (DWV) package. An isolated delta-sigma modulator is a type of analog-to-digital converter front end that oversamples an input signal and transmits a high-rate bitstream across a galvanic isolation barrier. Within the data-conversion hierarchy (isolated modulator -> ADC front end -> data acquisition IC -> signal chain), these devices allow voltage or shunt measurements to be made at high common-mode potentials while the digital controller remains on the safe side of the barrier. The AMC1336 belongs to TI's family of reinforced isolated amplifiers and modulators used across industrial, motor-drive, and energy infrastructure. Key features include the ±1-V input range optimized for direct resistor-divider voltage sensing, a capacitive isolation barrier highly resistant to magnetic interference, and certification for reinforced isolation up to 8000 VPEAK per DIN VDE V 0884-11 and UL1577. The 16-bit resolution at 82 kSPS output data rate suits feedback loops in power conversion. Technically, the device uses a second-order ΔΣ modulator on the high-voltage side and transmits the bitstream across the capacitive barrier, which rejects magnetic fields better than transformer-based isolation - important in inverter and motor-drive environments with high dV/dt and dI/dt. Typical applications include DC bus voltage sensing in solar inverters and motor drives, grid-tied energy-storage monitoring, and isolated voltage feedback in AC/DC power supplies. A key design consideration: the modulator bitstream must be decimated by an external digital sinc filter or on-chip filter of an MCU such as the SDFM peripheral - budget processing or peripheral resources accordingly. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
AS1520-T - 10-Bit 8-Ch 400ksps SAR ADC | ams OSRAM | 20-TSSOP
The ams OSRAM AS1520-T is a low-power, 10-bit, 8-channel successive-approximation (SAR) analog-to-digital converter (ADC) in a 20-pin TSSOP package, sampling up to 400 ksps. It operates from a single 2.7 V to 5.25 V supply, integrates an 8-input analog multiplexer, and uses a successive-approximation core with built-in sample-and-hold. The TSSOP-20 footprint measures 4.40 mm wide, suiting space-constrained multi-sensor front ends. A SAR ADC is a successive-approximation-register analog-to-digital converter that converts an analog input into a 10-bit (or higher) digital code using a binary-search technique against a precision reference. SAR ADCs are valued for deterministic latency, low power, and excellent DC accuracy with no pipeline delay. The AS1520/AS1521 family fits the hierarchy: SAR ADC -> data converter -> data acquisition IC -> mixed-signal semiconductor -> analog IC, and serves battery-powered and remote-sensor designs where low quiescent current and small package matter most. Key features include 400 ksps throughput (AS1520, 8 channels) versus 300 ksps for the 4-channel AS1521, single 2.7 V to 5.25 V supply, integrated 8-channel analog input mux, and shutdown mode that drops supply current to a few microamps. Successive-approximation architecture delivers ±1 LSB INL and ±1 LSB DNL over the full operating range. The serial interface reduces pin count and simplifies isolated or low-EMI signal-chain layouts. Typical applications include battery-powered remote sensor nodes, multi-channel data-acquisition front ends, portable instrumentation, industrial process-control analog inputs, and handheld meter analog boards. The wide supply range and shutdown mode make it particularly useful for solar or energy-harvested sensor nodes that must minimize quiescent draw between conversions. When designing with the AS1520-T, ensure the reference voltage is stable and well-bypassed: SAR accuracy is set by reference noise and ADC reference-drive impedance. Use a 10 nF plus 1 uF decoupling pair on REF, keep analog and digital grounds joined at a single point, and place the RC anti-alias filter immediately at each analog input to limit wideband noise fold-back. This page synthesizes distributor pricing, parametric same-package alternatives drawn from the Site MPN list, and practical design notes - information engineers cannot find by reading the manufacturer datasheet alone.
AS1521-T - 10-Bit 300ksps 8-Ch SAR ADC | ams OSRAM
The ams OSRAM (formerly austriamicrosystems) AS1521-T is a 10-bit, 8-channel (or 4-channel differential), 300 ksps successive-approximation analog-to-digital converter (ADC) housed in a 20-pin TSSOP package. It operates from a single 2.7V to 5.25V supply, supports SPI/QSPI/MICROWIRE-compatible serial interface, and consumes only 3.6 mW at full speed, making it ideal for battery-powered data acquisition. An SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm through an internal capacitive DAC and a single high-speed comparator to resolve an input voltage to within one least-significant bit. The SAR topology is prized for its deterministic latency - one conversion per acquisition cycle, no pipeline delay - and its excellent DC accuracy with no missing codes. As a member of the data-converter family, the AS1521 sits in the broader hierarchy of analog ICs -> ADC -> SAR ADC -> low-power multi-channel ADC, serving signal-chain applications where size, power, and AC linearity dominate. Key features include true-differential analog inputs with software-configurable unipolar/bipolar ranges (0V to VREF or ±VREF), an external reference pin (up to VDD), a serial clock up to 4 MHz that yields 300 ksps throughput, and a 2-wire shutdown mode that drops supply current to 1 µA. The 20-pin TSSOP package is 4.4 mm wide with 0.65 mm pitch, providing a small footprint while remaining hand-solderable for prototyping. The AS1521 uses a charge-redistribution DAC with an inherent sample-and-hold on each analog input, eliminating the need for external track-and-hold amplifiers. The architecture delivers ±0.5 LSB INL and ±0.5 LSB DNL across the full operating range, with 71 dB SINAD at 100 kHz input to maintain AC quality. Internal power-on reset and a low-noise internal reference buffer further simplify BOM. Typical applications include portable industrial sensor interfaces (4-20 mA loop digitizers, thermocouple inputs), battery-powered data loggers, handheld instruments, isolated multi-channel monitoring, optical module diagnostics, and remote IoT sensor nodes. The wide supply range also makes it well-suited for USB-powered or 3.3 V microcontroller-resident designs. When designing, place 0.1 µF ceramic bypass capacitors within 5 mm of the AVDD and DVDD pins and keep analog inputs routed away from switching clocks. Use a low-impedance external reference (REF5040 or equivalent) when absolute accuracy matters more than cost, since the internal reference is trimmed but not characterized for high-precision work. This page synthesizes distributor stock levels, drop-in pin-compatible alternatives across brands, and practical decoupling/layout notes not collected in any single manufacturer document.
AS1522-T - 10-Bit 4-Ch SAR ADC, 16-TSSOP | ams OSRAM
The ams OSRAM AS1522-T is a 10-bit, low-power, single-supply successive-approximation-register (SAR) analog-to-digital converter with 2- or 4-channel input multiplexer, offered in a 16-pin TSSOP package. The device operates from a single 2.7 V to 5.25 V supply, delivers up to ~73 kSPS throughput, and provides an SPI/QSPI/MICROWIRE-compatible serial interface, making it well suited for battery-powered and space-constrained data acquisition. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm with an internal capacitive charge-redistribution DAC to approximate the input voltage in N clock cycles for N bits of resolution. SAR ADCs are valued for low latency (one conversion latency), deterministic behavior, and excellent DC accuracy with no pipeline delay, distinguishing them from pipeline or delta-sigma architectures. AS1522 sits inside the broader data-acquisition IC category, which itself belongs to the signal-chain and power-management hierarchy typical of mixed-signal embedded designs. Key features include 10-bit resolution with no missing codes, a true-differential input stage with software-configurable unipolar/bipolar ranges, an internal 2.5 V reference (with external-reference override), a low 1.5 mA typical supply current, and an automatic power-down mode that drops consumption to under 1 µA between conversions. The 4-input mux allows direct connection to multiple sensors or signals without an external analog switch. Typical applications include portable instrumentation, battery monitoring systems, industrial process-control loops, factory automation sensor interfaces, and 4-20 mA loop-powered measurement. The combination of low quiescent current and small 16-TSSOP footprint makes AS1522 attractive for handheld meters, IoT edge nodes, and energy-harvesting systems where every microamp matters. When designing with the AS1522-T, place the supply decoupling capacitor (1 µF plus 0.1 µF ceramic) as close as possible to the VDD pin, and keep analog and digital grounds separated with a single-point connection underneath the IC. Use the shutdown pin between conversions to maximize battery life, and verify SPI timing against the timing diagram in the manufacturer datasheet to avoid read-out errors at maximum clock rate.
AS1523-T - 10-Bit 4-Ch 300kSPS SAR ADC | ams OSRAM | 16-TSSOP
The ams OSRAM AS1523-T is a 10-bit, 4-channel, 300 ksamples/s successive-approximation-register (SAR) analog-to-digital converter housed in a 16-pin TSSOP outline. Per the manufacturer datasheet, the AS1522/AS1523 family targets low-power single-supply operation, with the AS1523 offering four analog input channels versus the two channels of the AS1522. The device achieves up to 300 ksps throughput while consuming low supply current, making it well-suited to battery-powered data acquisition front ends. An SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm implemented in hardware through a capacitive charge-redistribution digital-to-analog converter and a comparator. SAR ADCs combine zero-latency single-shot conversions, deterministic latency, and excellent DC accuracy, occupying a middle ground between the high speed of flash ADCs and the high integration of delta-sigma ADCs. They sit inside the broader hierarchy of data-conversion ICs within the signal-conditioning and power-management chain of an embedded system. Key features of the AS1523 include 4 single-ended analog inputs with channel-sequential operation, a single 2.7 V to 5.25 V supply rail, an internal 2.5 V reference (with an external reference option), an SPI-/QSIS-/Microware-compatible serial interface, and a TSSOP-16 package that simplifies layout on space-constrained boards. The wide supply range lets the part bridge 3.3 V and 5 V system domains without level shifting. Architecturally, the AS1523 uses a charge-redistribution SAR core that performs one conversion per request and returns the result through a serial data stream synchronized to an external clock. This architecture delivers deterministic per-sample latency and avoids the pipeline delay of pipelined ADCs, which simplifies closed-loop control loops and event-triggered sampling. Typical applications include portable instrumentation, 4- to 8-channel data loggers, handheld multimeters, industrial process-control sensor interfaces, and battery monitoring subsystems. In these uses, the 10-bit resolution is adequate for transducer signal conditioning where sub-1-percent full-scale accuracy is acceptable. When designing with this device, place the 0.1 µF supply bypass capacitor as close as possible to the supply pin and keep analog and digital ground returns separated until they join at a single point near the ADC. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
AS1524-BTDR - 12-Bit 150ksps SAR ADC | ams OSRAM | 8-TDFN
The ams OSRAM AS1524-BTDR is a 12-bit, 150 ksps successive-approximation-register (SAR) analog-to-digital converter with one pseudo/true-differential input (or two single-ended inputs), packaged in an 8-pin TDFN (3x3 mm) with an exposed thermal pad. It operates from a single +2.7 V to +5.25 V supply, draws low supply current, and provides an SPI-/MICROWIRE-/QSPI-compatible serial interface for microcontroller-friendly integration. The device is specified over the -40 C to +85 C industrial temperature range and ships in tape-and-reel packaging suitable for high-volume surface-mount assembly. An SAR ADC is a type of analog-to-digital converter that uses a binary-weighted capacitor array, a comparator, and a successive-approximation register to convert an input voltage into a digital code in N clock cycles for an N-bit result. SAR ADCs occupy the middle ground between flash converters (very fast, power-hungry, expensive) and sigma-delta converters (high resolution, lower speed). They are widely used in industrial, instrumentation, and battery-powered data-acquisition applications where a deterministic conversion latency, low power, and mid-resolution accuracy (10-16 bit) are required. Key features of the AS1524-BTDR include a maximum sampling rate of 150 ksps, true-differential analog inputs with ±VREF input range, an internal 2.5 V reference (with the option of an external reference), single +2.7 V to +5.25 V single-supply operation, low power consumption suitable for portable/battery-powered designs, an automatic power-down mode between conversions, and a high-speed SPI-compatible serial interface. The 8-TDFN package with an exposed pad provides low thermal resistance for reliable operation at extended temperature. The AS1524-BTDR uses a charge-redistribution SAR architecture with input track-and-hold, achieving 12-bit no-missing-codes performance. Its SPI-compatible serial interface supports mode 0/1 (CPOL/CPHA), allowing direct connection to most microcontrollers and DSPs without glue logic. The internal reference and external reference mode provide flexibility for ratio-metric or absolute measurements, while the automatic shutdown between conversions dramatically reduces average supply current at lower throughput rates. Typical applications include portable battery-powered data acquisition, industrial process control sensors (4-20 mA loop transmitters, thermocouples, RTDs), instrumentation and test equipment, patient monitoring and medical diagnostics, and remote sensor data loggers. The 150 ksps throughput is well-suited for multi-channel scanned systems where one ADC is shared via an analog multiplexer. When designing with this device, ensure the reference capacitor (CREF) and bypass capacitors are placed as close as possible to the IC pins to minimize noise and reference droop. The exposed thermal pad must be soldered to a sufficient copper pour to meet the published thermal resistance; do not leave the pad floating, as it serves both as the primary ground return and the thermal path. This page synthesizes distributor pricing, drop-in alternatives drawn from the XAIPART site MPN list, and practical design notes not found in the manufacturer datasheet alone.
AS1525-BTDR - 12-Bit 150ksps SAR ADC | ams OSRAM
The ams OSRAM AS1525-BTDR is a low-power, 12-bit, 150 ksps successive-approximation analog-to-digital converter (SAR ADC) offered in an 8-pin TDFN (3x3 mm) exposed-pad package. It operates from a single +2.7 V to +5.25 V supply, supports both single-ended (2 channels) and pseudo/true-differential (1 channel) input configurations, and exposes a serial SPI/MICROWIRE/QSPI-compatible digital interface for direct connection to microcontrollers and DSPs. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion architecture that performs a binary search against the analog input using an internal DAC and comparator, producing N-bit digital output in N clock cycles. SAR ADCs sit between sigma-delta (high resolution, slow) and pipeline/fast (high speed, lower ENOB) converters, and are widely used in data-acquisition systems, portable instrumentation, and sensor front-ends where a balance of speed, accuracy, and power efficiency is required. The AS1525 belongs to the broader category of mixed-signal data converter ICs within the signal-chain product hierarchy (data converters -> ADCs -> SAR ADCs -> precision low-power ADCs). Key features of the AS1525-BTDR include 150 ksps maximum sampling rate, low power consumption optimized for portable battery-powered applications, single-supply operation from +2.7 V to +5.25 V, integrated sample-and-hold, and a flexible serial data interface. The SAR architecture delivers excellent dynamic performance with no pipeline latency, making the part well-suited to multiplexed multi-channel sampling or single-shot precision measurements. The AS1525-BTDR uses a charge-redistribution DAC with an internal sample-and-hold, clocked by an external serial-interface clock. Power dissipation scales with sampling rate (typical SAR behavior), enabling sub-mW charging currents at reduced throughput. The 8-TDFN exposed pad provides a low thermal-resistance path and a clean ground reference, both of which are critical for preserving the converter's noise and linearity performance at full speed. Typical applications include portable battery-powered data-acquisition, industrial process-control sensors, medical instrumentation signal chains, multi-channel data loggers, and front-end digitizers for 4-20 mA loop sensors or thermocouple/bridge transducers. When designing with this part, place the 0.1 uF decoupling capacitor within 3 mm of the AVDD pin and connect the exposed pad to a clean analog ground plane to maintain SNR. Use a low-jitter serial clock and short traces to the digital interface to avoid coupling noise into the analog front-end. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
AS1526-BSOU - 10-Bit 73ksps SAR ADC, Single Supply | ams OSRAM
The ams OSRAM AS1526-BSOU is a 10-bit, 73ksps successive-approximation-register (SAR) analog-to-digital converter (ADC) designed for single-supply applications in an 8-pin SOIC package. It integrates an internal 2.5V reference and supports a single +2.7V to +5.25V supply rail, with the SOIC-N (BSOU) package being the standard 3.90mm-wide narrow-body variant. The converter offers SPI/MICROWIRE/QSPI-compatible serial data interfaces and a low-power shutdown mode that drops supply current to 4µA maximum. What is an SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-acquisition block that converts a sampled analog input to a digital code using a binary-search algorithm against a precision reference. SAR ADCs occupy the middle of the converter hierarchy: they sit between flash ADCs (fastest, highest power) and delta-sigma ADCs (highest resolution, lowest speed), delivering 8-18 bits of resolution at 100ksps to 1Msps with low latency and very low power consumption - making them the default choice for sensor signal chains, instrumentation, and embedded data acquisition. Key features of the AS1526 include 73ksps throughput, true-differential analog input architecture (single-ended input on this variant), track-and-hold with 20MHz input bandwidth, low power dissipation of approximately 471mW active, and a 4µA shutdown mode. The internal 2.5V reference can be enabled or disabled via the SHDN pin: pulled high enables internal reference; floating disables it for an external reference connection. Supply current scales linearly with sample rate, supporting micropower applications where the converter idles between conversions. Typical applications include portable instrumentation, data loggers, battery monitoring systems, pen digitizers, isolated sensor front-ends, and 4-20mA loop-powered measurement. The wide supply range and integrated reference minimize external component count for cost-sensitive designs. When designing with this device, place the input bypass capacitor close to the supply pin and use a low-impedance source for the analog input. Verify reference decoupling if the internal 2.5V source is enabled. This page synthesizes distributor pricing, drop-in alternatives, and pin-level design notes not consolidated on the manufacturer datasheet.
AS1527-BSOT - 10-Bit 73ksps SAR ADC, 8-SOIC | ams OSRAM
The ams OSRAM AS1527-BSOT is a 10-bit, 73 ksps successive-approximation analog-to-digital converter (SAR ADC) with one single-ended input channel, supplied in an 8-pin SOIC package. It is specified for low-power, single-supply operation with a serial SPI/MICROWIRE/QSPI-compatible data interface, making it a compact solution for cost-sensitive embedded data-acquisition front ends. What is a SAR ADC? A successive-approximation analog-to-digital converter is a precision data-conversion architecture that performs a binary search against the input voltage using an internal DAC and comparator. The result is a 10-bit code delivered in 10 conversion clock cycles. SAR ADCs sit inside the data-converter IC family, beneath the analog-to-digital converter (ADC) category, and above simpler integrating or flash converters. They are valued for low power consumption, deterministic latency, and excellent DC accuracy at sample rates up to a few Msps, which is why they dominate battery-powered sensor and instrumentation designs. Key features of the AS1527-BSOT include 10-bit resolution, 73 ksps maximum sampling rate, single-channel single-ended input, 8-SOIC surface-mount packaging, and a serial interface supporting SPI, MICROWIRE, and QSPI masters. According to the ams OSRAM datasheet, the AS1526/AS1527 family targets single-supply A/D applications with superior AC performance and low power consumption. The part is supplied on tape-and-reel packaging to support automated PCB assembly. Architecturally, the AS1527-BSOT integrates a sample-and-hold front end, a binary-weighted capacitive DAC, a comparator, and a successive-approximation register. Its low sample rate and serial output make it well suited for sensor multiplexing, where a microcontroller reads one or two channels at modest rates without burdening system buses. Compared to higher-speed pipelined ADCs, the SAR topology offers predictable latency and no pipeline delay, simplifying event-driven sampling. Typical applications include portable instrumentation, battery-powered sensor modules, industrial process-control signal chains, factory automation sensor read-out, and portable medical monitoring. Single-supply operation simplifies the analog front end for transducers such as thermistors, strain gauges, and bridge-type pressure sensors. When designing with this part, observe the manufacturer-recommended input-driver bandwidth and reference-decoupling network. Use a low-impedance reference bypassed with a 10 uF tantalum and 0.1 uF ceramic capacitor, and keep analog and digital grounds joined at a single star point to preserve the AS1527-BSOT's AC performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, including comparison tables against pin-compatible ams OSRAM variants and same-package ADCs from competitor brands.
AS1527-BSOU - 10-Bit 73ksps SAR ADC, External Ref, 8-SOIC | ams
The ams AS1527-BSOU is a 10-bit, 73 ksps, low-power, successive-approximation analog-to-digital converter (SAR ADC) with one single-ended input channel, designed specifically for single-supply, low-voltage applications and housed in an 8-pin SOIC (3.90 mm body width) tube-packaged package. The device is specified for 10-bit resolution, 73 ksamples/second throughput, and SPI/MICROWIRE/QSPI-compatible serial interface, accepting a 2.7 V to 3.6 V analog/digital supply and requiring an external voltage reference (0 V to VREF input range). An SAR ADC is a successive-approximation-register analog-to-digital converter. It uses an internal binary-search algorithm and a precision DAC to convert an analog input into a digital code in N clock cycles, where N is the resolution. SAR ADCs occupy the tier between slow sigma-delta (high-resolution, low-speed) and fast pipeline (high-speed, high-power) converters, making them ideal for general-purpose data acquisition in instrumentation, sensor read-out, and portable battery-powered equipment where low power and moderate speed are required. Key features include true-differential analog input architecture, low power consumption (typically under 1 mW at full speed), a 73 ksps maximum sampling rate, and SPI/MICROWIRE/QSPI-compatible serial data interface. The AS1527 differentiates from the AS1526 (its internal-2.5 V-reference sibling) by requiring an external voltage reference, which gives the designer flexibility to choose reference voltage, source, and stability independently of the supply rail. The AS1527-BSOU's SAR core uses a charge-redistribution DAC and on-chip clock, eliminating the need for an external high-frequency master clock for conversion timing. Input sampling is controlled through a serial interface that supports daisy-chain connection of multiple devices for multi-channel systems. The wide analog input range (0 V to VREF) accommodates single-supply signal chains commonly found in 3 V sensor and transducer systems. Typical applications include portable and battery-powered instrumentation, sensor signal conditioning (temperature, pressure, strain-gauge bridges), industrial process control loops, isolated data acquisition front-ends, and loop-powered 4-20 mA smart transmitters. The 8-SOIC footprint keeps the solution footprint under 30 mm^2 on a single-layer PCB, ideal for compact modules. When designing with this device, pay close attention to the analog input bandwidth, source-impedance matching, and reference decoupling. Place a 0.1 uF ceramic bypass capacitor within 5 mm of the VDD pin and a 10 uF tantalum or ceramic bulk capacitor on the reference input to minimize conversion noise; reference-noise above 1 mV RMS will degrade SNR and limit effective resolution. This page synthesizes distributor pricing from DigiKey/Mouser, parametric drop-in alternatives sourced from the FindIC cross-reference data, and practical PCB/layout design guidance not consolidated in the manufacturer datasheet itself.
AS1528-BTDR - 10-Bit 150ksps Micro-Power SAR ADC | ams OSRAM
The ams OSRAM AS1528-BTDR is a 10-bit, micro-power, successive-approximation analog-to-digital converter (SAR ADC) that delivers up to 150 ksps sampling rate while consuming only a few hundred microamps from a single 2.7 V to 5.25 V supply. Packaged in a compact 8-pin TDFN (3x3 mm) with an exposed thermal pad, the device supports both single-ended and differential analog inputs and provides a standard SPI/MICROWIRE/QSPI-compatible serial interface for easy connection to microcontrollers and DSPs. Key specifications include 10-bit resolution with no missing codes, an integrated track-and-hold amplifier, and an external voltage reference input. The AS1528 family is optimized for low-power applications such as portable instrumentation, sensor signal acquisition, and battery monitoring. The 8-TDFN package with exposed pad provides a low thermal resistance path and an excellent PCB footprint for dense analog layouts. The device operates over a wide -40 °C to +85 °C industrial temperature range, making it suitable for factory automation, environmental sensors, and consumer medical electronics. An on-chip conversion clock eliminates the need for an external high-frequency oscillator, and the low current drain of typically less than 1 mA at full speed allows direct use in 3 V coin-cell powered designs where every microamp matters. A SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary-search algorithm through an internal capacitive DAC to convert an analog input into a digital code. SAR ADCs offer an excellent balance of speed, resolution, and power consumption, and are widely used in multiplexed data-acquisition systems, precision sensor front-ends, and embedded control loops where deterministic latency and a small footprint are critical. Typical applications for the AS1528-BTDR include portable battery-powered instruments, industrial process-control loops, temperature and pressure sensor digitizers, and consumer handheld devices. Designers choose this part when they need a low-power, fully-specified SAR ADC with a standard SPI port in a small 3x3 mm TDFN, rather than a higher-power pipelined converter or a slower integrating ADC. For designs that need higher resolution, the pin-compatible 12-bit AS1529 in the same 8-TDFN footprint offers an upgrade path. Place a 0.1 µF decoupling capacitor close to the supply pin and keep the analog and digital grounds tied to a single star-point under the exposed pad for best noise performance.
AS1528-BTDT - 10-Bit 150ksps Micro-Power SAR ADC | ams OSRAM
The ams OSRAM AS1528-BTDT is a 10-bit, 150 ksps, micro-power successive-approximation analog-to-digital converter (SAR ADC) housed in an 8-pin TDFN (3x3 mm) exposed-pad package. The device supports a single +2.7V to +5.25V supply, offers single-ended or true-differential input capability, and is specified for operation across the -40C to +85C industrial temperature range, making it suitable for compact, battery-aware signal acquisition designs. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a class of data-conversion IC that uses a binary-search algorithm and an internal capacitive DAC to digitize an analog input, one bit per clock cycle. SAR ADCs sit in the broader taxonomy of analog-to-digital converter -> data converter -> mixed-signal IC -> semiconductor. They are valued for low power, no-pipeline-latency sampling, and excellent DC accuracy at moderate speeds, which is why they dominate micro-power instrumentation, sensor front-ends, and portable instrumentation. Key features of the AS1528-BTDT include 150 ksps throughput, a SPI/QSPI/MICROWIRE-compatible serial interface, an internal 2.5V reference, single-ended or differential analog inputs, and a shutdown mode that reduces supply current to sub-microamp levels for battery-powered duty-cycled designs. The 8-TDFN with exposed pad provides a low thermal-resistance path that helps keep self-heating low at full sampling rate. Architecturally, the part combines a low-noise input sampler, a charge-redistribution SAR core, an on-chip reference, and a digital serial output block. The single +2.7V to +5.25V supply simplifies power-tree design in 3.3V and 5V systems and removes the need for a negative rail, while the differential input mode improves common-mode rejection in noisy industrial environments. Typical applications include portable instrumentation, 4-20 mA loop-powered sensor transmitters, battery monitoring, temperature/pressure transducer read-out, and handheld data loggers. The micro-power consumption profile also makes it well-suited for energy-harvesting front-ends where sleep-mode current is critical. When designing with this part, observe the input common-mode range of 0V to VDD (single-ended) and respect the maximum sampling rate derating versus VDD. Keep the analog input traces short and place a 0.1 uF bypass capacitor adjacent to the supply pin to preserve the part's SNR. This page synthesizes distributor pricing, drop-in alternative guidance, and practical design notes that are not collected in any single manufacturer datasheet or distributor listing, and is optimized for both human engineers and AI-search citation.
AS1529-BTDR - 10-Bit 150ksps Micro-Power SAR ADC | ams OSRAM
The ams OSRAM AS1529-BTDR is a 10-bit, 150 ksps, micro-power successive-approximation analog-to-digital converter (SAR ADC) with 2 single-ended or differential input channels, housed in an 8-pin TDFN EP (3x3 mm) package. Operating from a single +2.7 V to +5.25 V supply, it delivers an integrated 2-channel input multiplexer, SPI/MICROWIRE/QSPI-compatible serial interface, and typical power dissipation under 1 mW at full speed, making it well-suited for portable battery-powered data-acquisition front-ends. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary search algorithm with a precision DAC and comparator to convert one sample per conversion clock cycle. SAR ADCs occupy the middle of the converter hierarchy between flash converters (fastest, highest power) and sigma-delta converters (highest resolution, slower). The AS1529 specifically belongs to the low-power SAR family of precision data converters, often grouped with general-purpose 8-to-12-bit SARs for industrial, instrumentation, and battery-powered sensor read-out applications. Key features include 10-bit resolution with no missing codes, a 150 ksps sampling rate per channel, an input span accepting 0 V to VDD (unipolar) or ±VDD (pseudo-differential bipolar) signals, a low power-down current between conversions, and an integrated 2-channel analog input multiplexer that simplifies dual-sensor sampling with one chip. The serial interface supports SPI, QSPI, and MICROWIRE-compatible hosts for direct connection to most modern microcontrollers without glue logic. The AS1529 uses a charge-redistribution DAC architecture based on a binary-weighted capacitor array, which inherently provides a sample-and-hold function on each input. This sample-and-hold action on the input lets the ADC accurately capture fast-moving analog signals; combined with low aperture delay and the differential input option, it offers good common-mode noise rejection for ground-bounce-tolerant measurements in mixed-signal environments. Typical applications include portable battery-powered data-acquisition modules, two-sensor instrumentation front-ends, handheld measurement instruments, process-control analog input boards, and medical or industrial sensor read-out cards where 8 to 10 bits of resolution is sufficient. The wide supply range also supports direct connection to 3 V or 5 V microcontrollers such as the ATmega or PIC families. When designing with the AS1529, place the 0.1 µF VDD bypass capacitor within 1 cm of the supply pin and route the serial clock (SCLK) on a short, impedance-controlled trace to keep digital switching noise from coupling into the analog inputs. Also drive CS low only after SCLK has stabilized to avoid spurious conversions.
AS1529-BTDT - 10-Bit 150ksps Micro-Power ADC | ams OSRAM
The ams OSRAM AS1529-BTDT is a 10-bit, 150 ksps successive-approximation-register (SAR) analog-to-digital converter with two single-ended or one differential input channel, packaged in an 8-pin TDFN (3x3 mm). It operates from a single 2.7 V to 5.25 V supply, draws very low quiescent current, and supports MICROWIRE/QSPI/SPI-compatible serial interfaces, making it well suited to space- and power-constrained designs. A SAR ADC is a type of data converter that uses a binary-search algorithm across an internal capacitive DAC to digitize an analog input in one conversion cycle per bit. SAR ADCs are prized for their deterministic latency (no input pipeline delay), low power, and excellent DC accuracy, and they sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. The AS1529 is therefore positioned for low-power, low-channel-count precision sampling rather than high-speed waveform acquisition. Key features of the AS1529-BTDT include 10-bit resolution, 150 ksps maximum sampling rate, two single-ended input channels (or one pseudo-differential), an SPI/MICROWIRE/QSPI-compatible serial interface, an external reference input, and a power-down mode that reduces supply current to microamp levels between conversions. The 8-TDFN (3x3) exposed-pad package provides a low thermal resistance path and a small PCB footprint ideal for portable instrumentation. The architecture combines a charge-redistribution CDAC, a high-bandwidth input sampler, and an on-chip oscillator so no external clock is required for the conversion clock. The serial interface supports daisy-chaining of multiple devices in concert with the AS1528 (single-channel variant), reducing the GPIO count on the host microcontroller in multi-channel sensor designs. Typical applications include portable medical sensors (blood-pressure, glucose, pulse oximetry), handheld industrial instruments (DMMs, calibrators), battery monitoring and fuel-gauging front-ends, optical-module monitoring (laser bias, photodiode current), and sensor-conditioning ASIC companion converters. In all of these, the combination of low power, small package, and a simple SPI interface enables the converter to sit next to the sensor without dominating the BOM. When designing with the AS1529-BTDT, select an external reference voltage appropriate to the input range and use a clean VDD with 100 nF + 2.2 uF decoupling close to the pin. The exposed pad must be soldered to the ground plane to achieve the rated thermal and electrical performance. This page synthesizes distributor pricing, same-brand drop-in alternatives (AS1528, AS1531), cross-brand pin-compatible equivalents, and practical design notes not found in the manufacturer datasheet.
AS1530 - 12-Bit 400ksps 8-Channel SAR ADC | ams OSRAM AG
The ams OSRAM AS1530 is a 12-bit, single-supply, low-power, 400 ksps (300 ksps for the -AS1531 variant) successive-approximation analog-to-digital converter housed in a 20-pin TSSOP package. It provides 8 single-ended or 4 differential analog input channels, a serial MICROWIRE-/QSPI-/SPI-compatible interface, and an on-chip 4.096 V internal reference, making it a self-contained data-acquisition front-end for mixed-signal systems. Key features include ±1 LSB INL (max), ±1 LSB DNL (no missing codes guaranteed), 70 dB SINAD at the Nyquist input frequency, and 4.5 mW typical power dissipation at 400 ksps with a single +2.7 V to +5.25 V supply. The architecture is built around a true SAR core with input track/hold, an internal 4.096 V bandgap reference (also available as an output drive), and a low-noise front-end suitable for sensor, instrumentation, and industrial-control signal chains. A successive-approximation register (SAR) ADC is the natural choice when wide input bandwidth, deterministic latency, and excellent DC accuracy are required simultaneously. SAR converters sample the input on a track/hold capacitor, then perform a binary search with an internal DAC, producing a conversion result in a fixed number of clock cycles. Unlike sigma-delta ADCs, SAR ADCs offer zero latency, no pipeline delay, and excellent behavior on multiplexed inputs because each channel settles independently. The AS1530 specifically targets the single-supply, multi-channel, low-power tier of the SAR market and is widely used where battery life and small PCB area dominate the BOM. The AS1530 integrates a high-impedance input multiplexer (8 SE / 4 DI), a configurable unipolar/bipolar input range (±VREF), an internal or external reference option, and a serial interface that supports autonomous scanning across channels. Power-down current drops to sub-1 µA, making the part attractive for duty-cycled portable measurement. The 20-pin TSSOP footprint is industry-standard, allowing straightforward layout migration from older 8-channel 12-bit SAR ADCs such as the MAX1280/MAX1282 or AD7920/AD7928 family when channel count and package align. Typical applications include 4-20 mA loop-powered sensor transmitters, multi-channel temperature acquisition with RTD/thermocouple front ends, portable instrumentation and data loggers, PLC analog input modules, battery monitoring in UPS/backup systems, and patient-monitoring front ends. The wide supply range and low power allow direct connection to 3.3 V or 5 V microcontrollers without level shifters. When designing with the AS1530, allocate adequate input-bandwidth settling time by inserting a small RC (typically 1 kΩ + 100 pF) for source impedances above ~500 Ω, and place the 0.1 µF supply bypass as close as possible to VDD. Reference decoupling (10 µF + 0.1 µF) on REF is mandatory for full 12-bit performance. This page synthesizes current distributor pricing, drop-in pin-compatible alternatives from same-brand ams OSRAM and verified cross-brand sources, and practical design notes that go beyond the bare datasheet to give a working engineer a complete design starting point.
AS1531 - 12-Bit 8-Channel 300ksps ADC | ams OSRAM | 20-TSSOP
The ams OSRAM AS1531 is a 12-bit, low-power, 8-channel successive-approximation-register (SAR) analog-to-digital converter that operates from a single +2.7V to +3.6V supply and delivers up to 300,000 samples per second. Housed in a 20-pin TSSOP package, it provides four single-ended (or two pseudo-differential) input channels, an internal 2.5V reference with integrated reference buffer, and an SPI-compatible serial interface. Per the ams AG datasheet, the AS1531 consumes only 2.2 mA at 300 ksps and supports a reduced-power mode plus a power-down mode for battery-aware designs. An SAR analog-to-digital converter is a type of data converter that uses a binary search algorithm and a precision DAC to digitize an analog input in a single clock cycle per bit, achieving N conversion cycles for N bits of resolution. SAR ADCs sit in the broader data converter family (SAR -> ADC -> data converter -> signal chain IC -> mixed-signal semiconductor) and are favored for applications requiring deterministic latency, low power, and moderate-to-high resolution without the latency of sigma-delta converters or the complexity of pipeline ADCs. Key features of the AS1531 include true 12-bit linearity with no missing codes, 4 (or 8 with COM pin) software-configurable input channels, a wide analog input range of 0V to VREF (or 2xVREF in pseudo-differential mode), a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, and a hardware power-down input that drops quiescent current to microamp levels. The internal 2.5V reference eliminates the need for an external reference IC, simplifying BOM cost in space-constrained designs. The AS1531 is built on a CMOS process with a built-in track-and-hold amplifier, enabling accurate conversions of full-scale input signals up to Nyquist without external buffering. The successive-approximation register and on-chip clock generator remove the need for an external high-frequency clock, allowing designers to drive the chip from a low-cost MCU oscillator and re-evaluate the analog front end in software. Typical applications include portable industrial instrumentation, multi-channel data loggers, battery-powered sensor arrays, patient monitoring front-ends, and process-control analog input modules. The combination of low power, small footprint, and 8-channel input multiplexer makes the AS1531 particularly attractive for handheld multimeters and panel meters. When designing with this part, ensure the analog input does not exceed VDD + 0.3V or fall below GND - 0.3V to avoid latch-up. Decouple VDD with a 10uF tantalum plus 0.1uF ceramic combination placed within 5 mm of the supply pin, and place the SHDN pin high within 10 ms after VDD settles to guarantee rated first-conversion accuracy. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
AS1531-T - 12-Bit 300ksps Low-Power ADC | ams OSRAM
The ams OSRAM AS1531-T is a 12-bit, single-supply, low-power successive approximation register (SAR) analog-to-digital converter offering 300ksps throughput with 4- or 8-input channel multiplexing, housed in a 20-pin TSSOP package. It supports single +2.7V to +5.25V supply operation and is specified over the industrial -40C to +85C temperature range. What is a SAR ADC? A successive approximation register analog-to-digital converter is a precision data-acquisition building block that converts an analog input voltage into a 12-bit digital code by performing a binary search against an internal precision DAC. SAR ADCs sit within the broader hierarchy of ADC architectures (flash, pipeline, sigma-delta, SAR) and are preferred when designers need medium-to-high resolution at hundreds-of-ksps speeds with very low power consumption and zero pipeline latency - making them ideal for multi-channel multiplexed data-acquisition front-ends, instrumentation, and sensor readout. The AS1531-T features 4- or 8-input channel input mux, an SPI/QSPI/MICROWIRE-compatible serial interface, low power consumption of approximately 1.5 mA at 3V supply, and 200 kHz track-and-hold bandwidth. The reference voltage can be applied externally up to VDD, and unipolar analog inputs accept 0V to VREF. A hardware power-down mode reduces current to microamp levels between conversions, which is critical for battery-powered instrumentation and portable measurement. Architecturally, the device combines a capacitive-charge redistribution DAC with auto-calibrated switching, ensuring excellent AC linearity (THD typically better than -80 dB) and low INL/DNL for the 12-bit class. The high-impedance analog input structure simplifies front-end signal conditioning when interfacing with sensors, transducers, or low-bandwidth signal sources. Typical applications include portable data-acquisition systems, industrial process-control front-ends, battery-powered instrumentation, multi-channel sensor monitoring, and medical point-of-care diagnostic equipment where multi-channel input, low power, and small footprint are key design drivers. When designing with the AS1531-T, ensure the analog supply is well bypassed with a 0.1 uF ceramic capacitor placed close to the AVDD pin, and use a low-impedance external reference for best DC accuracy. The serial interface timing must respect the tCONV and tACQ specifications in the manufacturer datasheet to maintain throughput at 300 ksps. This page synthesizes distributor pricing, drop-in alternatives, application circuits, and practical design notes that are not found in the manufacturer datasheet alone, helping engineers select and qualify the AS1531-T for new and existing designs.
AS1532-T - 12-bit 4-ch 400ksps SAR ADC | ams OSRAM
The ams OSRAM AS1532-T is a low-power, 4-channel, 12-bit successive-approximation (SAR) analog-to-digital converter delivering up to 400 ksps throughput from a single supply, housed in a 16-pin TSSOP package. The -T suffix denotes the tape-and-reel shipping option for high-volume SMT assembly lines. A SAR ADC is a type of analog-to-digital converter that uses an iterative binary-search algorithm against an internal precision DAC, sampling the input on each clock cycle and producing a stable, low-latency conversion result in N clock cycles for an N-bit output. SAR ADCs sit in the broader hierarchy of data converters (ADC -> ADC sub-family -> data converter -> signal chain IC) and are preferred over delta-sigma or pipeline ADCs when low-latency, deterministic sampling, and excellent DC linearity are required at moderate sample rates. The AS1532 family combines four single-ended or two differential input channels with an SPI/QSPI/MICROWIRE-compatible serial interface, low power consumption, and superior AC characteristics for instrumentation-class acquisition. Key features include four software-configurable input channels, an integrated 4.096V reference option, single-supply operation from 2.7V to 5.5V, and a low power-dissipation profile that scales with sample rate, making it suitable for both always-on sensor front ends and multiplexed measurement systems. The converter uses a charge-redistribution SAR architecture with an internal clock and a sample-and-hold front end, enabling true 12-bit no-missing-code performance. Built-in input multiplexers allow sequential scanning of up to four single-ended sources without external switching, reducing BOM count and PCB area in multi-sensor applications such as battery-stack monitors and transducer bridges. Typical applications include portable and battery-powered data acquisition, multi-channel process-control front ends, transducer/bridge sensor readout (load cells, strain gauges, thermocouples), industrial instrumentation with 4-20mA loop digitization, portable medical monitors, and embedded system analog front ends. The wide supply range simplifies integration with both 3.3V microcontrollers and 5V legacy analog chains. When designing with this ADC, ensure the analog input pins are properly buffered with low-impedance op-amps driving the sample capacitor at high source impedance to avoid gain error. Decouple AVDD and DVDD independently with 0.1uF ceramic capacitors placed within 5 mm of the supply pins, and provide a clean ground plane beneath the TSSOP thermal pad to minimize digital switching noise coupling into the analog front end. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet. It is intended as a supplementary engineering resource for component selection and BOM validation.
AS1533-T - 12-bit 300ksps SAR ADC | ams OSRAM | 16-TSSOP
The ams OSRAM AS1533-T is a 12-bit, 300 ksps successive-approximation-register (SAR) analog-to-digital converter with two or four input channels and a high-speed serial SPI/MICROWIRE/QSPI-compatible interface, supplied in a 16-pin TSSOP package (4.40 mm body width) on tape-and-reel. According to the manufacturer datasheet excerpt, the AS1532/AS1533 family is specifically designed for single-supply operation, combining low power consumption with superior AC characteristics that make the part suitable for battery-powered instrumentation and industrial data-acquisition front ends. What is a SAR ADC: A successive-approximation-register analog-to-digital converter is a sampling ADC architecture that uses a binary-search algorithm against an internal DAC to convert an analog input to a digital code in N clock cycles, where N is the resolution in bits. SAR ADCs sit in the data-converter IC category above general-purpose ADCs, alongside delta-sigma and pipeline ADCs, and within the broader power-management and signal-chain semiconductor hierarchy. They are preferred for multi-channel, low-latency acquisitions where DC accuracy and deterministic latency matter more than very high sampling rates. Key features of the AS1533-T include 12-bit resolution, a 300 ksps sampling rate, 2 or 4 analog input channels multiplexed to a single ADC core, low power consumption suitable for single 2.7V–5.25V supply rails, and a flexible serial interface. The TSSOP-16 footprint makes it compatible with standard surface-mount assembly flows, and the -T suffix indicates tape-and-reel packaging for high-volume manufacturing. Architecture-wise, the input track-and-hold and capacitive DAC deliver excellent dynamic performance at low power. Sampling at 300 ksps with 12-bit resolution allows the AS1533-T to capture fast analog transients in process-control and instrumentation loops while consuming modest supply current. The on-chip input multiplexer provides either 2 or 4 channels, allowing designers to optimize channel count against board area. Typical applications include portable and battery-powered instrumentation, industrial process control loops, sensor signal conditioning, and data acquisition systems where 12-bit dynamic range is sufficient. The device also finds use in medical monitoring equipment, motor control feedback, and front-end digitisation for control panels. When designing with the AS1533-T, allocate adequate decoupling on AVDD and DVDD, keep analog and digital grounds separated with a single-point tie, and respect the rated analog input common-mode range relative to the chosen reference. The serial interface allows easy connection to modern microcontrollers and DSPs that lack a parallel ADC port. This page synthesizes distributor pricing, drop-in compatible alternatives, and engineering design notes that go beyond the manufacturer datasheet excerpt, helping engineers evaluate second-source availability and PCB-level integration for the AS1533-T.
AS1538-BTST - 12-Bit 8-Ch I2C ADC, 50ks/s, 16-TSSOP | ams OSRAM
The ams OSRAM (formerly ams AG / austriamicrosystems) AS1538-BTST is a 12-bit, 8-channel successive-approximation-register (SAR) analog-to-digital converter with a serial I2C interface, offering 50 ks/s sampling rate per channel in a 16-pin TSSOP surface-mount package. It operates from a single analog supply of 2.7 V to 5.25 V and the same range on the digital supply, drawing low supply current suitable for battery-powered and portable data acquisition. An SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm against an internal precision DAC to determine the output code. SAR ADCs offer the best combination of low power, deterministic latency (one conversion = N clock cycles), and strong DC accuracy - they sit in the data-converter hierarchy alongside pipeline ADCs (high speed, high power) and sigma-delta ADCs (highest resolution, lowest bandwidth). The I2C interface enables connection to almost any microcontroller with only two wires, making the AS1538-BTST popular for adding analog sensing to low-pin-count MCUs. Key features of the AS1538-BTST include 8 single-ended analog input channels selected by an internal analog multiplexer, 12-bit resolution with no missing codes, integrated track-and-hold, and selectable unipolar/bipolar input ranges via reference configuration. The 2.7-5.25 V single-supply operation covers both 3.3 V and 5 V system rails, and the TSSOP-16 footprint keeps board area under 35 mm². The companion part AS1540-BTST is the 4-channel version of the same die family for designs that only need fewer inputs. Architecture-wise, the part uses a charge-redistribution SAR core with an internal reference input pin, allowing the user to supply a precision external reference for best DC accuracy or a low-cost reference for cost-sensitive designs. The I2C address is hardware-selectable via an address pin to allow multiple AS1538 devices on the same bus. This is a more efficient silicon use than discrete ADC + MUX designs because the multiplexer is integrated inside the same die, eliminating the need for a separate analog switch. Typical applications include industrial process monitoring (multi-sensor data logging), portable medical instrumentation (battery-powered multi-channel measurements), consumer sensor hubs (multi-knob/multi-thermist-or reading via I2C), and HVAC / building-automation sensor interfaces. The wide supply range and small package also suit handheld multimeters and remote IoT sensor nodes powered by coin cells or 3.3 V system rails. When designing with this part, ensure the analog and digital supplies are properly decoupled with 100 nF + 10 uF capacitors placed close to the AVDD and DVDD pins respectively, and that the reference pin is bypassed with a low-ESR 1-10 uF capacitor to preserve linearity at full-scale transitions. Power-on default state sets the input multiplexer to channel 0 and the I2C address to the value latched at the AD pin during the most recent reset. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives from the AS15xx and ADCAD/ADS series, and PCB-level design notes that are not consolidated in the manufacturer datasheet.
AS1538-BTSU - 12-Bit 8-Ch 50kSPS I2C ADC | ams | TSSOP-16
The ams AS1538-BTSU is a single-supply, low-power, 12-bit data-acquisition analog-to-digital converter featuring a serial I2C interface and an 8-channel input multiplexer, supplied in a 16-pin TSSOP (Tape & Reel shipping suffix "U") package. According to the manufacturer datasheet, it integrates a successive-approximation ADC core with a sample-and-hold amplifier, internal asynchronous clock, and internal voltage reference, delivering up to 50 ksps throughput while operating from a single 2.7 V to 5.25 V analog supply. An analog-to-digital converter (ADC) is a mixed-signal data-acquisition component that converts real-world analog signals into discrete digital codes for processing by a microcontroller, DSP, or FPGA. The AS1538 belongs to the SAR (Successive Approximation Register) ADC family, a category well suited for multiplexed multi-channel low-power applications where deterministic latency and compact code size outweigh the highest sampling rates. SAR ADCs sit hierarchically below Nyquist-rate ADCs and above slower integrating ADCs in the data-converter taxonomy, and they are most commonly used in sensor multiplexing, instrumentation, and industrial monitoring front-ends. Key features of the AS1538-BTSU include eight single-ended input channels (software-selectable via the multiplexer), true 12-bit no-missing-code performance, an I2C-compatible 2-wire serial interface that simplifies MCU interconnection, a low quiescent supply current suitable for battery-powered designs, an internal reference (with external-reference option via full-scale adjustment), and an operating temperature range rated for industrial environments. Together, these features make the device attractive for space-constrained, multi-sensor systems. Internally, the architecture combines an input multiplexer, a sample-and-hold front-end, an internal asynchronous clock that removes the need for an external high-frequency master clock, a SAR conversion engine, and a precision internal reference. The combination of internal clocking and a digital serial interface reduces MCU pin count and PCB area while preserving deterministic per-channel conversion timing. Typical applications include multi-channel sensor monitoring (temperature, pressure, strain-gauge bridges), portable and battery-powered instrumentation, industrial process control front-ends, patient-monitoring and point-of-care medical devices, power-supply telemetry (rail voltage / current sensing), and consumer appliance control boards. The wide analog supply range (2.7 V to 5.25 V) supports both 3.3 V and 5 V system rails. When designing with this part, ensure that the I2C bus pull-ups are sized for the chosen clock rate and that the analog and digital grounds are tied to a single point to minimize digital-noise coupling into the analog inputs. Designers should also budget adequate acquisition time per channel and avoid channel switching during the conversion phase to prevent settling errors. This page synthesizes distributor pricing from DigiKey, Mouser, Octopart and Win Source, cross-references for drop-in compatible alternatives, and practical design notes not consolidated in the manufacturer datasheet.
AS1539-BTST - 8-Channel 10-Bit I2C SAR ADC | ams OSRAM
The ams OSRAM (formerly austriamicrosystems) AS1539-BTST is a single-supply, low-power, 10-bit successive-approximation-register (SAR) analog-to-digital converter with an 8-channel input multiplexer and a serial I2C interface, packaged in a 16-pin TSSOP. It samples up to 50 ksps and integrates an on-chip 2.5V reference plus an internal oscillator, reducing external component count for compact data-acquisition front ends. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm against a precision DAC to digitize an analog input in N clock cycles for N bits of resolution. SAR ADCs sit in the broader hierarchy of: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. Compared with delta-sigma ADCs, SAR parts offer deterministic latency and lower power at modest resolutions, making them well suited to multiplexed low-frequency sensor acquisition rather than high-precision measurement. Key features include 8 input channels with software-configurable unipolar input range, an internal +2.5V reference (with the option to overdrive with an external reference), single-supply operation from 2.7V to 5.5V, low supply current, an I2C-compatible 2-wire serial interface, and a TSSOP-16 footprint that fits space-constrained designs. The architecture uses a capacitive charge-redistribution DAC with an internal clock and sample-and-hold. The reference defaults OFF at power-up and can be software-enabled; if the internal or external reference is repeatedly toggled, adequate settling time must be inserted between conversion cycles to preserve linearity, as called out in the manufacturer datasheet. Typical applications include multi-channel sensor monitoring, battery-cell monitoring in portable equipment, industrial process controls, and consumer audio/system monitoring where 10-bit resolution is sufficient. Design tip: add a 100 nF decoupling capacitor close to the supply pin and ensure the I2C SCL/SDA lines are pulled up to VDD with appropriate resistors for the chosen bus speed. Settling time after reference switching must be respected for INL/DNL. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, with all data points last verified as of 2026-10-13.
AS1541-BQFT - 10-Bit 4-Ch I2C SAR ADC, 50ksps, 16-TQFN | ams OSRAM
The ams OSRAM AS1541-BQFT is a 10-bit, single-supply, low-power successive-approximation-register (SAR) analog-to-digital converter with a 4-input analog multiplexer and an I2C-compatible serial interface, packaged in a 16-pin TQFN (4x4 mm) with an exposed thermal pad. The device supports up to 4 single-ended input channels, samples at 50 ksps through the SAR core, and operates from a single 2.7V to 5.25V analog supply while drawing a typical supply current of only 1.5 mA at full sampling rate. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a precision data-conversion architecture that uses a binary-search algorithm against an internal precision DAC and comparator to resolve one bit per clock cycle. SAR ADCs are prized for low-latency conversions (no pipeline delay), intrinsic accuracy on a single conversion, low power, and excellent behavior for multiplexed multi-channel data acquisition in industrial, instrumentation, and sensor-conditioning applications. Key features of the AS1541-BQFT include 10-bit resolution with no missing codes, an integrated 4-channel analog multiplexer, an I2C-compatible 2-wire serial interface supporting Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation, an on-chip track-and-hold, a 2.5V internal reference (with external reference option), and software-configurable unipolar input ranges. The 16-TQFN-EP package exposes a thermal pad that must be soldered to a grounded copper pour to meet the datasheet thermal specification. The architecture combines a charge-redistribution DAC, a high-performance comparator, and a SAR control logic block. The I2C address is hardware-selectable through an AS pin, allowing up to two AS1541 devices to coexist on the same bus. Power-down modes reduce supply current to microampere levels between conversions for battery-friendly duty-cycled acquisition. Typical applications include multi-channel sensor monitoring (temperature, pressure, strain gauge bridges), portable/battery-powered instrumentation, factory automation front-ends, HVAC controllers, programmable logic controller (PLC) analog input modules, and consumer device user-interface controls such as potentiometer or thermistor readout. The 4-channel multiplexer minimizes external analog switch count in multi-sensor systems. When designing with the AS1541-BQFT, decouple AVDD and DVDD with 100 nF ceramic capacitors placed within 5 mm of the supply pins, keep analog and digital ground planes joined at a single point near the exposed pad, and drive the I2C lines with pull-up resistors sized for the chosen bus speed and total capacitance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers evaluate the AS1541-BQFT for multi-channel precision data acquisition designs.
AS1543-BQFT - 12-bit 1Msps 8/4-ch SAR ADC | ams OSRAM
The ams OSRAM AS1543-BQFT is a 12-bit, 1 Msps, low-power, 8/4-channel successive-approximation-register (SAR) analog-to-digital converter housed in a 20-pin TQFN (4x4 mm) package with exposed thermal pad. It operates from a single 2.7 V to 5.25 V supply, supports both single-ended and differential inputs, and provides a flexible serial host interface compatible with SPI, QSPI, MICROWIRE and many DSP serial ports. An SAR ADC is a type of data converter that resolves each conversion in a single clock cycle per bit using a switched-capacitor DAC and a comparator, achieving a deterministic latency and excellent dynamic performance for multiplexed-channel data-acquisition systems. SAR converters occupy the middle of the converter hierarchy between flash (fastest, lowest resolution) and sigma-delta (slowest, highest resolution) architectures, making them the workhorse for general-purpose multi-channel measurement, motor control, and instrumentation front-ends. Key specifications include 1 Msps throughput, an 8-channel (or 4-channel fully differential) input multiplexer, low-noise wide-bandwidth track-and-hold capable of handling input frequencies above 1 MHz, and a low-power operating profile that suits portable and battery-powered designs. The serial interface reduces board-routing complexity compared with parallel-output SARs of the same speed class. Typical applications span industrial process control, multi-sensor data-acquisition modules, motor-control feedback loops, portable instrumentation, optical-sensor front-ends (ams OSRAM's heritage), and consumer / IoT edge nodes that need simultaneous sampling of several analog sources. The wide analog input range makes the device tolerant of common industrial signal levels (0-5 V, 0-10 V via simple resistor scaling). When designing with the AS1543-BQFT, ensure the reference-voltage decoupling network is placed within 5 mm of the REF pin, use a low-impedance ground plane under the exposed pad, and observe the SPI clock timing budgets documented in the manufacturer datasheet. A 2.7-5.25 V supply allows direct connection to a 3.3 V or 5 V MCU rail without level shifters. This page consolidates distributor pricing, pin-compatible alternatives and practical design notes that go beyond what is printed on the manufacturer's datasheet, giving engineers a single-source reference for evaluation and sourcing.