AS1544-BQFT

Analog To Digital Converters (ADC) Overview

The AS1544-BQFT is a 4-channel, 12-bit successive-approximation analog-to-digital converter (ADC) from ams OSRAM. It operates on a single supply voltage ranging from 2.7V to 5.25V and supports throughput rates up to 1 Msps. The device features a low-noise, wide-bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 1 MHz. Key electrical parameters include a typical power consumption of 3.5 mA at 5.25V and 2.8 mA at 3.6V during maximum throughput. It includes a channel sequencer, software-configurable analog inputs (single-ended or fully differential), and a flexible serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 1 Msps throughput rate
• 4 single-ended or 2 fully-differential analog inputs
• Software-configurable input ranges and conversion modes
• Integrated channel sequencer and shadow register

Analog To Digital Converters (ADC) Applications

• Remote sensor data acquisition systems
• Portable data-logging devices
• Pen-digitizers
• Space-limited process control applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BQFT' against the manufacturer's official ordering information to confirm packaging type and reel specifications. Ensure the selected variant matches the required tape and reel dimensions for automated assembly processes. Cross-reference the component marking code with the datasheet package drawings to validate authenticity upon receipt.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1544-BQFT when four analog input channels are sufficient, as opposed to the eight-channel AS1543 variant. Confirm that the system requires a TQFN(4x4)-20 package footprint. Verify that the application can accommodate the required external reference voltage of 2.5V ±1% for specified performance metrics. Ensure the microprocessor interface supports the required serial clock speeds up to 20 MHz.

Analog To Digital Converters (ADC) Part Context

The AS1544 is part of the AS1543/44 family of high-speed, low-power ADCs manufactured by ams OSRAM (formerly austriamicrosystems). This family shares identical core architecture, pinout compatibility, and electrical characteristics, differing primarily in the number of available analog input channels. The AS1544 specifically provides four single-ended or two fully-differential inputs, offering a compact solution for multi-channel applications where space and power efficiency are critical constraints.

Analog To Digital Converters (ADC) Replacement Considerations

The AS1543 serves as a direct functional substitute if eight single-ended or four fully-differential channels are required instead of four/two. Both components share the same pinout, package, and electrical specifications. No other cross-model replacements are documented in the provided source material.