AS1542-BTST

Analog To Digital Converters (ADC) Overview

The AS1542 is a 12-bit, 16-channel successive-approximation analog-to-digital converter (ADC) operating from a single 2.7V to 5.25V supply. It delivers a throughput rate of 1 Msps with a low-noise track-and-hold amplifier capable of handling input frequencies exceeding 1 MHz. The device features software-configurable inputs for either 16 single-ended or 8 fully-differential channels, managed by an internal sequencer. Power consumption is 2.8 mA at 3.6 V and 3.5 mA at 5.25 V during maximum throughput. It interfaces via SPI/QSPI/Microwire/DSP protocols in a TSSOP-28 package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 1 Msps throughput rate
• 16 single-ended or 8 fully-differential analog inputs
• Internal channel sequencer and counter
• Low power: 2.8 mA @ 3.6V, 3.5 mA @ 5.25V at max speed
• Shutdown mode current of 0.5 µA

Analog To Digital Converters (ADC) Applications

• Remote sensor data acquisition
• Data-logging devices
• Pen-digitizers
• Process control systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout compatibility and packaging details. Confirm that the external reference voltage meets the specified 2.5V ±1% requirement for optimal performance. Ensure supply voltages remain within the 2.7V to 5.25V range during operation.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring multiple analog inputs with moderate precision and high speed. The choice between single-ended and differential modes depends on noise immunity requirements. Ensure the driving source impedance is low to maintain total harmonic distortion specifications. Verify that the system clock frequency supports the desired throughput rate up to 20 MHz.

Analog To Digital Converters (ADC) Part Context

The AS1542 belongs to the family of high-speed, low-power ADCs designed for space-constrained applications. It integrates a track-and-hold amplifier, SAR converter, and serial interface logic into a single TSSOP-28 package. The device eliminates pipeline delays, providing immediate conversion results synchronized with the chip select signal.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on matching 12-bit resolution, 1 Msps throughput, and TSSOP-28 package constraints.