AS1526-BSOU

Analog To Digital Converters (ADC) Overview

The AS1526-BSOU is a low-power, 10-bit analog-to-digital converter (ADC) from ams OSRAM. It operates on a single supply voltage ranging from 2.7V to 3.6V and achieves a maximum sampling rate of 73ksps with a conversion time of 7.5µs. The device integrates a successive-approximation register (SAR), an internal track/hold amplifier, and an internal 2.5V reference. Power consumption is 4mW at full speed, dropping to 1µW in shutdown mode. Data access utilizes a standard 3-wire serial interface compatible with SPI, QSPI, and Microwire protocols.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit resolution with 73ksps throughput and 7.5µs conversion time
• Single-supply operation (2.7V to 3.6V) with integrated 2.5V reference
• Low power consumption: 4mW active, 1µW shutdown
• 3-wire serial interface compatible with SPI, QSPI, and Microwire

Analog To Digital Converters (ADC) Applications

• Remote sensors
• Data-acquisition systems
• Data logging devices
• Lab instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BSOU' against the manufacturer's official ordering information to confirm package type and tape/reel specifications. Ensure the selected variant matches the required reference configuration, as the AS1526 includes an internal reference while the AS1527 requires an external one.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1526 variant if an internal 2.5V reference is desired; use the AS1527 for lower power consumption when an external reference is available. Consider source impedance limitations, as high impedance increases acquisition time. Ensure the system clock does not exceed 2.1MHz and that the input voltage remains within the 0V to VREF range.

Analog To Digital Converters (ADC) Part Context

The AS1526-BSOU belongs to the AS1526/AS1527 family of ultra-small, low-power ADCs designed for battery-powered applications. These devices are manufactured by ams OSRAM and are packaged in an 8-pin SOIC-150 format. The series is optimized for space-constrained environments requiring single-supply operation and robust performance.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1527 serves as a direct functional alternative within the same family, differing primarily in reference requirements and power consumption. Verify pin compatibility and software interface settings when substituting between these models.

Analog To Digital Converters (ADC) FAQ

How is the internal reference enabled or disabled?

For the AS1526, pulling the SHDNN pin high enables the internal reference. Letting the SHDNN pin float disables it, allowing the use of an external reference.

What is the minimum acquisition time for the track/hold circuit?

The minimum acquisition time (tACQ) is 1.5µs. This time increases proportionally with higher source impedances according to the formula tACQ = 7(RS + RIN) x 21pF.

Can the device operate with an external clock?

Yes, the AS1526/AS1527 support an external clock via the SCLK pin, which can operate at rates up to 2.1MHz. However, an internal clock is also available.