4-Channel DAS with 16-Bit, Bipolar Input, Simultaneous Sampling ADC

The AD7605-4 is a 4-channel, 16-bit, simultaneous sampling, analog-to-digital data acquisition system (DAS). The device contains analog input clamp protection, a second-order antialias-ing filter, a track-and-hold amplifier, a 16-bit charge redistribution successive approximation analog-to-digital converter (ADC), a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces.

The AD7605-4 operates from a single 5 V supply and can accommodate ±10 V and ±5 V true bipolar input signals while sampling at throughput rates of up to 300 kSPS for all channels. The input clamp protection circuitry can tolerate voltages up to ±16.5 V. The AD7605-4 has 1 MΩ analog input impedance, regardless of sampling frequency. The single-supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies.

The AD7605-4 is SPI, QSPI™, MICROWIRE™, and digital signal processor (DSP) compatible.

Applications

* Power-line monitoring and protection systems

* Multiphase motor control

* Instrumentation and control systems

* Multiaxis positioning systems

* Data acquisition systems (DAS)

* 4 simultaneously sampled inputs

* True bipolar analog input ranges: ±10 V (maximum), ±5 V (maximum)

* Single 5 V analog supply and 2.5 V to 5 V VDRIVE (nominal)

* Fully integrated data acquisition solution

* Analog input clamp protection

* Input buffer with 1 MΩ analog input impedance

* Second-order antialiasing analog filter

* On-chip accurate reference and reference buffer

* 16-bit ADC with 300 kSPS on all channels

* Flexible parallel/serial interface

* Serial peripheral interface (SPI)/QSPI™/MICROWIRE™/DSP compatible

* Performance

* 7 kV ESD rating on analog input channels

* Standby mode: 25 mW (typical)

* 64-lead LQFP package