AS1522-T

Analog To Digital Converters (ADC) Overview

The AS1522-T is a single-supply, low-power, 4-channel analog-to-digital converter (ADC) featuring 10-bit resolution and a sampling rate of 400 ksps. It utilizes a successive-approximation register (SAR) architecture with high-bandwidth track/hold circuitry. The device operates from a +4.5V to +5.5V supply and draws 2.8mA at full speed. Key electrical parameters include an INL of ±0.5 LSB, SINAD of 60 dB, and a typical SNR supporting accurate data acquisition in space-constrained applications.

Analog To Digital Converters (ADC) Feature Summary

• 400 ksps sampling rate with 10-bit SAR resolution
• Single-supply operation (+4.5V to +5.5V)
• Software-configurable input modes: Single-ended, Pseudo-differential, Fully differential
• Integrated 2.5V reference with external reference support
• Low power consumption: 2.8mA normal, 0.5µA power-down

Analog To Digital Converters (ADC) Applications

• Remote sensor systems
• Data-acquisition devices
• Pen-digitizers
• Process control instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'T' against the manufacturer's official documentation to confirm tape-and-reel packaging or temperature grade specifications. Ensure the voltage rating aligns with the +4.5V to +5.5V requirement for the AS1522 variant rather than the lower voltage AS1523.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring four analog inputs with moderate speed and low power. Compare against the AS1523 if a lower supply voltage (+2.7V to +3.6V) and slower 300 ksps rate are acceptable. Verify that the serial interface compatibility (SPI/QSPI/Microwire) matches the host microcontroller.

Analog To Digital Converters (ADC) Part Context

The AS1522 is part of a dual-channel/four-channel family alongside the AS1523. While sharing similar architectural features like SAR conversion and low power modes, the AS1522 is distinguished by its higher operating voltage range and faster 400 ksps throughput compared to the AS1523's 300 ksps limit.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1523 is a functional substitute within the same family but requires a lower supply voltage (+2.7V to +3.6V) and offers a reduced sampling rate of 300 ksps. Direct replacement requires verifying voltage headroom and timing constraints.