AS1528-BTDT

Analog To Digital Converters (ADC) Overview

The AS1528-BTDT is a micro-power, 10-bit analog-to-digital converter (ADC) from the AS1528/AS1529 series. It employs a successive-approximation register (SAR) architecture and operates on a single +2.7V to +5.25V supply. The device features true-differential track/hold circuitry with a 150kHz sampling rate and supports software-configurable unipolar or bipolar conversion modes. Power consumption scales with throughput, ranging from 350µA at 150ksps down to 200nA in automatic shutdown mode. Data access utilizes a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface with an internal conversion clock.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit SAR ADC with 150ksps sampling rate and true-differential input
• Low power operation: 350µA @ 150ksps, 200nA in shutdown mode
• Single-supply voltage range of +2.7V to +5.25V
• Software-selectable unipolar/bipolar conversion for AS1528 variant

Analog To Digital Converters (ADC) Applications

• Portable battery-powered data acquisition systems
• Remote sensor interfaces
• Data logging devices
• Lab instruments requiring space-limited A/D conversion

Analog To Digital Converters (ADC) Procurement Notes

Verify the BTDT suffix indicates the specific tape-and-reel packaging configuration as defined by the manufacturer's ordering information. Confirm that the component meets RoHS compliance requirements for the intended assembly process. Ensure the source document explicitly links the BTDT suffix to the AS1528 functional specification without altering electrical parameters.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1528-BTDT when differential input capability and low power consumption are required. The AS1528 variant supports both unipolar and bipolar input ranges, unlike the single-ended AS1529. Ensure the application can accommodate the 8-pin TDFN (3x3mm) package dimensions and provides a compatible 3-wire serial interface for data retrieval.

Analog To Digital Converters (ADC) Part Context

The AS1528-BTDT belongs to the AS1528/AS1529 family of micro-power ADCs designed for portable applications. The AS1528 model specifically offers true-differential inputs and configurable polarity, distinguishing it from the single-ended AS1529. Both models share identical power profiles, package types, and serial interface protocols.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1529 serves as a related variant within the same family but lacks differential input support. No direct cross-manufacturer replacements are documented in the provided datasheet. Verify pin compatibility if substituting with other 10-bit SAR ADCs in the 8-pin TDFN package.

Analog To Digital Converters (ADC) FAQ

What is the maximum serial clock frequency for the AS1528?

The maximum serial clock frequency (fSCLK) is 8 MHz.

How does the AS1528 handle input common mode voltage?

The input common mode range extends from GND to VDD for both unipolar and bipolar modes.

What is the typical conversion time for the AS1528?

The typical conversion time (tCONV) is 3.7 µs, exclusive of acquisition time.