AS1534

Description

The AS1534 is a low-power, 8-channel, 200ksps, 12-bit analog-to-digital (A/D) converter specifically designed to operate with single-supply devices. Superior AC characteristics, very low power-consumption, and highly-reliable packaging make the AS1534 perfect for battery powered remote-sensor and data-acquisition devices.

The successive-approximation register (SAR), high-speed sampling, high-bandwidth track/hold circuitry, and configurable inputs combine to make the AS1534 highly flexible and configurable.

Internal registers are used to control the AS1534 features, report on the status of the device, and hold the A/D conversion results.

The device requires very low supply-current at the 200ksps max sampling speed, and features flexible power-down modes to reduce power consumption at slower throughput rate.

The AS1534 operates from a single +3 to +3.6V supply and contains an internal 2.5V reference and integrated reference buffer. The device also supports an external reference.

Data accesses are made via the fast 8-/16-bit parallel interface in support of a wide range of microprocessors.

The AS1534 is available in a 44-pin PQFP package.

Key Features

• Sampling Rate: 200ksps
• 8- and 16-Bit Parallel Interface
• Analog Input Types:
  • 8-Channel Single-Ended
  • 4-Channel Pseudo-Differential
  • 4-Channel Fully-Differential
• Software-Configurable Unipolar or Bipolar Inputs
• Internal +2.5V Reference
• External Reference: 1.2V to VDD
• Low-Power Operation:
  • 7.5mW (VDD = 3 V)
  • 1.5mW (Using Automatic Power-Down after Conversion; VDD = 3 V, 10ksps)
• Single-Supply Operation: +3 to +3.6V
• 44-pin PQFP Package

Applications

The device is ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process control, or any other space-limited A/D application with low power-consumption requirements.