AD7891YP-1

ADCs/DACs - Special Purpose Overview

The AD7891YP-1 is an 8-channel, 12-bit data acquisition system from Analog Devices. It integrates a multiplexer, track/hold amplifier, ADC, and 2.5 V reference on a single chip. Operating from a single 5 V supply, it supports ±5 V or ±10 V input ranges with overvoltage protection up to ±17 V. The device offers parallel and serial interfaces, selectable via the MODE pin. Key electrical parameters include a maximum conversion time of 1.6 μs, a typical power dissipation of 82 mW in normal mode, and a standby power consumption of 75 mW. It guarantees no missing codes at 12 bits resolution.

ADCs/DACs - Special Purpose Feature Summary

• 8 analog input channels with individual overvoltage protection (±17 V for AD7891-1 variants).
• On-chip 2.5 V reference and track/hold amplifier.
• Configurable parallel or serial interface structure controlled by the MODE pin.
• Single 5 V supply operation with low power consumption (82 mW typical).

ADCs/DACs - Special Purpose Applications

• Data acquisition systems
• Motor control applications
• Mobile communication base stations
• Instrumentation equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix requirements for the target application. The 'Y' designation indicates an extended temperature range of -55°C to +105°C. Confirm whether the PLCC or MQFP package is required, as the datasheet lists both P-44A options for this model variant. Ensure compatibility with the ±5 V or ±10 V input range specifications defined for the AD7891-1 series.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7891YP-1 when bipolar input ranges of ±5 V or ±10 V are required. This model provides an accuracy of ±1 LSB relative accuracy. Choose this part if an industrial or automotive temperature range (-55°C to +105°C) is necessary, distinguishing it from the commercial A and B versions which operate from -40°C to +85°C. Verify interface needs, as throughput differs between parallel and serial modes.

ADCs/DACs - Special Purpose Part Context

The AD7891YP-1 belongs to the AD7891 family of high-speed data acquisition systems. It is functionally similar to the AD7891AP-1 but features an extended operating temperature range (-55°C to +105°C) compared to the commercial grade parts. It shares the same monolithic architecture combining an 8-channel MUX, 12-bit ADC, and reference voltage source.

ADCs/DACs - Special Purpose Replacement Considerations

Direct substitutes within the same family include the AD7891YS-1 (MQFP package) and AD7891ASZ-1 (Pb-free MQFP package). For unipolar applications, the AD7891-2 variants offer different input ranges (0 V to +5 V, etc.) but maintain similar performance characteristics.