The AD7656A-1, a pin- and software-compatible version of the AD7656A that reduces decoupling requirements, contains six 16-bit, fast, low power successive approximation ADCs integrated into a single package using an iCMOS process (industrial CMOS®) design. iCMOS is a process that combines high-voltage silicon with submicron CMOS and complementary bipolar technologies. With this process, it is possible to develop high-performance analog ICs that operate at 33V high voltages with a volumetric performance ratio that cannot be achieved with conventional high-voltage devices. Unlike analog ICs that use traditional CMOS processes, iCMOS components can input bipolar signals while improving performance, significantly reducing power consumption, and reducing package size.
AD7656A-1Throughput rates up to 250 kSPS and a built-in wide bandwidth (4.5 MHz) track-and-hold amplifier can handle input frequencies up to 4.5 MHz.
The conversion process and data acquisition are controlled using CONVST x signals and an internal oscillator. Three CONVST x pins (CONVST A, CONVST B, and CONVST C) allow three pairs of ADCs to be sampled simultaneously independently. The AD7656A-1 has both a high speed parallel interface and a high speed serial interface, allowing the device to interface with a microprocessor or digital signal processor (DSP). In serial interface mode, the AD7656A-1 allows multiple ADCs to be daisy-chained to a single serial interface. The AD7656A-1 is available in ? VREF and? ? True bipolar input signals are supported within the VREF range. The AD7656A-1 also contains an on-chip 2.5 V reference.
Multifunction pin names may only be referenced by relevant functions.
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Product features
- Six 16-bit, 250 kSPS ADCs are integrated on-chip.
- Six true bipolar, high impedance analog inputs.
- High-speed parallel and serial interfaces.
- Compared to the AD7656A device, decoupling requirements and bill of materials are reduced.
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- Power line monitoring and measurement systems
- Instrumentation and control systems
- Multi-axis positioning system