AS1528-BTDR

Analog To Digital Converters (ADC) Overview

The AS1528-BTDR is a micro-power, 10-bit analog-to-digital converter (ADC) from ams-OSRAM USA INC. It employs a successive-approximation register (SAR) architecture and operates on a single +2.7V to +5.25V supply. The device features a true-differential track/hold 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
• Laboratory instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the BTDR suffix indicates tape and reel packaging when sourcing. Confirm the specific revision level against the manufacturer's documentation to ensure compatibility with design requirements. Check for RoHS compliance status as per the latest datasheet revision.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1528 variant for differential input applications requiring configurable unipolar or bipolar ranges. Choose the AS1529 for dual single-ended channel inputs. Ensure the external reference voltage falls within the 1.0V to VDD + 50mV range. Verify that the source impedance allows for the required acquisition time of 1.4µs minimum.

Analog To Digital Converters (ADC) Part Context

The AS1528-BTDR belongs to the AS1528/AS1529 family of low-power ADCs manufactured by ams AG (now ams-OSRAM). These devices are designed for space-constrained applications requiring high dynamic performance and minimal power draw. The component is housed in an 8-pin TDFN (3x3mm) package suitable for surface-mount assembly.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on matching 10-bit resolution, 150ksps speed, and compatible serial interface protocols.

Analog To Digital Converters (ADC) FAQ

What is the maximum serial clock frequency supported?

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

How does the device handle power between conversions?

The AS1528-BTDR enters an automatic shutdown mode between conversions, drawing only 200nA typical current.

What is the input common mode range?

The input common mode range extends from GND to VDD.