Product Summary

The AD7891ASZ1 is an eight-channel 12-bit data acquisition system with a choice of either parallel or serial interface structure. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a +2.5V reference and a high speed interface. The AD7891ASZ1 provides the option of either a parallel interface or serial interface structure determined by the MODE pin. The applications of the AD7891ASZ1 are Data Acquisition Systems, Motor Control, Mobile Communication Base Stations, Instrumentation.

Parametrics

AD7891ASZ1 absolute maximum ratings: (1)VDD to AGND:–0.3 V to +7 V; (2)VDD to DGND:–0.3 V to +7 V; (3)Analog Input Voltage to AGND: ±17 V; (4)Reference Input Voltage to AGND:–0.3 V to VDD + 0.3 V; (5)Digital Input Voltage to DGND:–0.3 V to VDD + 0.3 V; (6)Digital Output Voltage to DGND:–0.3 V to VDD + 0.3 V; (7)Operating Temperature Range: Commercial (A, B Version):–40℃ to +85℃, Automotive (Y Version):–55℃ to +105℃; (8)Storage Temperature Range:–65℃ to +150℃; (9)Junction Temperature:+150℃.

Features

AD7891ASZ1 features: (1)Fast 12-Bit ADC with 1.6 ms Conversion Time; (2)Eight Single-Ended Analog Input Channels; (3)Overvoltage Protection on Each Channel; (4)Selection of Input Ranges: ±5V, ±10V for AD7891-1; (5)Parallel and Serial Interface; (6)On-Chip Track/Hold Amplifier; (7)On-Chip Reference; (8)Single Supply, Low Power Operation (85 mW max); (9)Power-Down Mode (75μW typ).

Diagrams

AD7891ASZ1 block diagram

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