AS1543-BQFT

Analog To Digital Converters (ADC) Overview

The AS1543-BQFT is a 12-bit, high-speed, low-power successive-approximation analog-to-digital converter (ADC) from ams-OSRAM USA INC. 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 an internal track-and-hold amplifier capable of handling input frequencies exceeding 1 MHz. It includes a channel sequencer for programmed sequential conversion of multiple channels. The AS1543 variant provides 8 single-ended or 4 fully differential analog inputs, while the AS1544 offers 4 single-ended or 2 fully differential inputs. Data acquisition is controlled via chip select and serial clock signals, ensuring no pipeline delays.

Analog To Digital Converters (ADC) Feature Summary

• Single-supply operation with VDRIVE function: 2.7V to 5.25V
• Fast throughput rate: 1 Msps with 12-bit resolution
• Software-configurable analog input types: 8/4-channel single-ended or 4/2-channel fully-differential
• Low power consumption: 10.1mW @ 1Msps (3.6V) and 18.4mW @ 1Msps (5.25V)
• Shutdown mode current: 0.5µA

Analog To Digital Converters (ADC) Applications

• Remote sensors
• Data-acquisition devices
• Data-logging devices
• Pen-digitizers
• Process control systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix 'BQFT' against the manufacturer's official documentation to confirm package type, temperature range, and reel specifications. Ensure that the required external reference voltage of 2.5V ±1% is available for specified performance. Confirm that the system design accommodates the TQFN(4x4)-20 package thermal requirements and pinout assignments.

Analog To Digital Converters (ADC) Selection Notes

Select the AS1543 model if 8 single-ended or 4 fully differential inputs are required; choose AS1544 for 4 single-ended or 2 fully differential inputs. Ensure the application requires a maximum throughput of 1 Msps and can provide a 20MHz serial clock. Verify that the supply voltage range (2.7V to 5.25V) matches the system power rails. Consider the need for an external 2.5V reference for optimal dynamic performance.

Analog To Digital Converters (ADC) Part Context

The AS1543/44 series consists of 12-bit ADCs designed for space-limited applications requiring low power consumption. The AS1543 provides 8 single-ended or 4 fully differential inputs, while the AS1544 offers 4 single-ended or 2 fully differential inputs. Both share identical electrical characteristics and interface protocols, differing only in the number of available analog input channels.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.