Using the AD7328 8-Channel ADC in Applications with Single-Ended Industrial-Level Signals (cn0047)
This circuit is designed to optimize the performance of the AD7328 bipolar input, 8-channel, 12-bit plus sign ADC. The AD7328 can operate at a throughput rate of 1 MSPS. The selected operational amplifier (op amp) and reference voltage source ensure that maximum AD7328 performance is achieved with industrial-level, single-ended signal sources by providing a low impedance driver with adequate settling time and an accurate reference supply.
The AD7328 is designed on the iCMOS® (industrial CMOS) process. This is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. 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.
Figure 1. Single-Ended-to-Differential Input (Simplified Schematic: Decoupling and All Connections Not Shown)
Схемы и диаграммы
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