AD7657
PRODUCTION250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 14-Bit A/D Converter
- Part Models
- 3
- 1ku List Price
- Starting From $12.48
Part Details
- 6 independent ADCs
- True bipolar analog inputs
- Pin-/software-selectable ranges: ±10 V, ±5 V
- Fast throughput rate: 250 kSPS
- iCMOS process technology
- Wide input bandwidth 86.5 dB SNR at 50 kHz input frequency
- Low power 140 mW at 250 kSPS with 5 V supplies
- 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
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 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 parts 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 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
- Six 16-/14-/12-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
Documentation
Data Sheet 1
User Guide 1
Application Note 2
Technical Articles 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7657BSTZ | 64-Lead LQFP (10mm x 10mm) | ||
| AD7657BSTZ-REEL | 64-Lead LQFP (10mm x 10mm) | ||
| AD7657YSTZ | 64-Lead LQFP (10mm x 10mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 1, 2009 - 09_0258 AD7657 and AD7658 Data Sheet Update |
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| AD7657BSTZ | PRODUCTION | |
| AD7657BSTZ-REEL | PRODUCTION | |
| AD7657YSTZ | PRODUCTION | |
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Nov 16, 2009 - 06_0157 Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland |
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| AD7657BSTZ | PRODUCTION | |
| AD7657BSTZ-REEL | PRODUCTION | |
| AD7657YSTZ | PRODUCTION | |
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Jan 5, 2009 - 07_0077 Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages |
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| AD7657BSTZ | PRODUCTION | |
| AD7657BSTZ-REEL | PRODUCTION | |
| AD7657YSTZ | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Shunt Voltage References 1 | ||
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Evaluation Kits
AD7657_evaluation_kit