AD7657BSTZ

250 kSPS时， 6通道，同步采样，双极性12月14日位/ 16位ADC 250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC

Product Details

The AD7656/AD7657/AD7658 contain six 16-/14-/12-bit, fast, low power, successive approximation ADCs all in the one package that is designed on the _i_CMOS™ process industrial CMOS. _i_CMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs, capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve. Unlike analog ICs using conventional CMOS processes, _i_CMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.

The AD7656/AD7657/AD7658 feature throughput rates up to 250 kSPS. The parts contain low noise, wide bandwidth, track-and-hold amplifiers that can handle input frequencies up to 12 MHz.

The conversion process and data acquisition are controlled using CONVST signals and an internal oscillator. Three CONVST pins allow independent, simultaneous sampling of the three ADC pairs. The AD7656/AD7657/AD7658 all have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. In serial interface mode, the parts have a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656/ AD7657/AD7658 can accommodate true bipolar input signals in the ±4 × VREF range and ±2 × VREF range. The AD7656/ AD7657/AD7658 also contain an on-chip 2.5 V reference.

For reduced decoupling requirements visit the AD7657-1 product page

Product Highlights

1. Six 16-/14-/12-bit, 250 kSPS ADCs on board.

2. Six true bipolar, high impedance analog inputs.

3. Parallel and high speed serial interfaces.

**Applications**

.

Power line monitoring systems

.

Instrumentation and control systems

.

Multi-axis positioning systems

### Features and Benefits

.

6 independent ADCs

.

True bipolar analog inputs

.

Pin-/software-selectable ranges: ±10 V, ±5 V

.

Fast throughput rate: 250 kSPS

.

iCMOS process technology

.

Low power

140 mW at 250 kSPS with 5 V supplies

.

Wide input bandwidth 86.5 dB SNR at 50 kHz input frequency

.

On-chip reference and reference buffers

.

Parallel, serial, and daisy-chain interface modes

.

High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

.

Standby mode: 100 µW maximum

.

64-lead LQFP