Overview
Features and Benefits
- 6 independent analog-to-digital converters (ADCs)
- True bipolar analog inputs
- Pin-/software-selectable ranges: ±10 V or ±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:
Serial peripheral interface (SPI)/QSPI™/MICROWIRE®/DSP compatible - Power-down mode: 100 mW maximum
- 64-lead LQFP
- Improved power supply sequencing (PSS) robustness
Product Details
The AD7656A contains six 16-bit, fast, low power, successive approximation analog-to-digital converters (ADCs) all in the one package that is designed on the iCMOS® process (industrial CMOS). iCMOS 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 devices could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.
The AD7656A features throughput rates of up to 250 kSPS. It contains wide bandwidth (12 MHz), track-and-hold amplifiers that can handle input frequencies up to 12 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 independent, simultaneous sampling of the three ADC pairs. The AD7656A has a high speed parallel and serial interface, allowing the device to interface with microprocessors or digital signal processors (DSPs). In serial interface mode, the AD7656A has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656A can accommodate true bipolar input signals in the ±4 × VREF range and ±2 × VREF range. The AD7656A also contains an on-chip 2.5 V reference.
Multifunction pin names may be referenced by their relevant function only.
Please visit next generation product AD7606. For reduced decoupling requirements visit the AD7656A-1 product page.
PRODUCT HIGHLIGHTS
- Six 16-bit, 250 kSPS ADCs on board.
- Six true bipolar, high impedance analog inputs.
- Parallel and high speed serial interfaces.
APPLICATIONS
- Power line monitoring systems
- Instrumentation and control systems
- Multi-axis positioning systems
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD7656ABSTZ | Material Declaration | Reliability Data | 64-Lead LQFP (10mm x 10mm) | |
| AD7656ABSTZ-RL | Material Declaration | Reliability Data | 64-Lead LQFP (10mm x 10mm) | |
| Wafer Fabrication Data |
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