AS1541-BQFT

Analog To Digital Converters (ADC) Overview

The AS1541-BQFT is a single-supply, low-power, 10-bit Analog-to-Digital Converter (ADC) featuring a serial I²C interface and a 4-channel multiplexer. It integrates a sample-and-hold amplifier, an internal asynchronous clock, and an internal 2.5V reference. The device supports high-speed I²C communication at up to 3.4MHz and operates within a supply voltage range of 2.7V to 5.25V. Key electrical characteristics include a throughput frequency of 50kSPS, no missing codes, and a full shutdown current of less than 1.5µA. It is available in TSSOP-16 or TQFN 4x4 16-pin packages.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit resolution with no missing codes and 50kSPS sampling rate
• 4-channel analog input multiplexer with single-ended or differential configuration
• High-speed I²C interface supporting clock frequencies up to 3.4MHz
• Integrated 2.5V internal reference with external reference capability
• Low power consumption: <1.5µA in full shutdown mode

Analog To Digital Converters (ADC) Applications

• Voltage-supply monitoring systems
• Isolated data acquisition circuits
• Transducer interfaces
• Battery-operated portable devices
• Remote data acquisition nodes

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'BQFT' against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the selected variant matches the required thermal and mechanical constraints for the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1541 when four analog channels are sufficient, as opposed to the eight-channel AS1539. Consider the internal 2.5V reference for simplified designs; however, use an external reference if the supply voltage exceeds 2.7V to maintain full dynamic range. Verify I²C bus speed compatibility with the host microcontroller.

Analog To Digital Converters (ADC) Part Context

The AS1541 is part of the AS1539/AS1541 family from ams-OSRAM USA INC. These devices are successive approximation register (SAR) ADCs designed for low-power, space-constrained applications. The family shares identical core architecture, differing primarily in the number of analog input channels provided by the integrated multiplexer.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1539 serves as a functional alternative requiring eight analog channels instead of four. Both devices share identical pinouts, electrical characteristics, and software protocols, allowing for direct substitution if channel count requirements change.