AD7328BRUZ-REEL

8通道，软件可选的真双极性输入， 12位加符号位ADC 8-Channel, Software-Selectable True Bipolar Input, 12-Bit Plus Sign ADC

Product Details

The AD7328 is an 8-channel, 12-bit plus sign, successive approximation ADC designed on the iCMOS industrial CMOS process._ 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, dramatically reduced power consumption, and reduced package size.

The AD7328 can accept true bipolar analog input signals. The AD7328 has four software-selectable input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. Each analog input channel can be independently programmed to one of the four input ranges. The analog input channels on the AD7328 can be programmed to be single-ended, true differential, or pseudo differential.

The ADC contains a 2.5 V internal reference. The AD7328 also allows for external reference operation. If a 3 V reference is applied to the REFIN/OUT pin, the AD7328 can accept a true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS supplies are required for the ±12 V input range. The ADC has a high speed serial interface that can operate at throughput rates up to 1 MSPS.

**Product Highlights**

1. The AD7328 can accept true bipolar analog input signals, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V unipolar signals

2. The eight analog inputs can be configured as eight single-ended inputs, four true differential input pairs, four pseudo differential inputs, or seven pseudo differential inputs

3. 1 MSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-compatible interface

4. Low power, 30 mW, at a maximum throughput rate of 1 MSPS

5. Channel sequencer

### Features and Benefits

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12-Bit plus Sign SAR ADC

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True Bipolar Input Ranges

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Software Selectable Input Ranges: ± 10V, ± 5V, ± 2.5V, 0 to 10V

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Eight Analog Input Channels with Channel Sequencer

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Single Ended, True Differential and Pseudo Differential Analog Input Capability

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High Analog Input Impedance

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Low Power: 26 mW

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Full Power Signal Bandwidth: >13 MHz

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Internal 2.5 V Reference

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High Speed Serial Interface - 1 MSPS Throughput

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For four and two channel equivalent devices, see AD7324, AD7322