AS1521-T

Analog To Digital Converters (ADC) Overview

The AS1521-T is a low-power, single-supply, 8-channel analog-to-digital converter featuring a 10-bit successive-approximation register architecture. It operates from a +2.7V to +3.6V supply and supports sampling rates up to 300ksps with a typical supply current of 2.2mA. The device includes an internal 2.5V reference, software-configurable input ranges, and multiple power modes including full power-down (0.5µA). Data access utilizes a high-speed SPI/QSPI/Microwire-compatible serial interface, and the component is housed in a 20-pin TSSOP package.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit resolution with 8 analog input channels
• Single-supply operation (+2.7V to +3.6V) at 300ksps
• Internal 2.5V reference with external reference support
• Software-configurable input types (single-ended, differential)

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 that the ordering suffix 'T' corresponds to the specific tape-and-reel packaging configuration defined by the manufacturer's official documentation. Confirm the voltage range matches the AS1521 specifications (+2.7V to +3.6V) rather than the AS1520 variant. Ensure compatibility with the required 20-pin TSSOP footprint during procurement planning.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1521-T for applications requiring lower supply voltages compared to the AS1520 variant. This model is suitable for battery-powered systems due to its reduced power consumption and availability of a full power-down mode. Verify that the system clock frequency does not exceed 4.8MHz to maintain the specified 300ksps throughput rate.

Analog To Digital Converters (ADC) Part Context

The AS1521-T belongs to the AS1520/AS1521 family of 10-bit A/D converters manufactured by ams-OSRAM USA INC. While sharing identical architectural features such as SAR conversion and serial interfaces, the AS1521 is distinguished by its lower operating voltage range (+2.7V to +3.6V) and slightly reduced maximum sampling rate (300ksps) compared to the AS1520.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1520 serves as a functional alternative within the same package but requires a higher supply voltage (+4.5V to +5.5V). Direct substitution is possible only if the system design accommodates the increased voltage requirements and the higher current consumption associated with the AS1520 variant.