AD7657-1 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 14-Bit ADC
Six 16-/14-/12-bit, 250 kSPS ADCs on board.
Six true bipolar, high impedance analog inputs.
High speed parallel and serial interfaces.
Reduced decoupling requirements and reduced bill of materials cost compared with the AD7656/AD7657/ AD7658 devices.
The AD7656-1/AD7657-1/AD7658-1 are reduced decoupling pin- and software-compatible versions of AD7656/AD7657/AD7658. The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/ 14-/12-bit, fast, low power successive approximation ADCs in a package 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 conven-tional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.
The AD7656-1/AD7657-1/AD7658-1 feature throughput rates of up to 250 kSPS. The parts contain low noise, wide bandwidth track-and-hold amplifiers that can handle input frequencies up to 4.5 MHz.
The conversion process and data acquisition are controlled using the CONVST signals and an internal oscillator. Three CONVST pins (CONVST A, CONVST B, and CONVST C) allow independent, simultaneous sampling of the three ADC pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. When the serial interface is selected, each part has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656-1/AD7657-1/ AD7658-1 can accommodate true bipolar input signals in the ±4 × VREF and ±2 × VREF ranges. Each AD7656-1/AD7657-1/ AD7658-1 also contains an on-chip 2.5 V reference.
Product Highlights
Applications
- Power line monitoring and measuring systems
- Instrumentation and control systems
- Multiaxis positioning systems
Features and Benefits- Pin and software compatible with AD7656/AD7657/AD7658 featuring reduced decoupling requirements
- 6 independent ADCs
- True bipolar analog inputs
- Pin-/software-selectable ranges: ±10 V, ±5 V
- Fast throughput rate: 250 kSPS
- iCMOS process technology
- Low power
140 mW at 250 kSPS with 5 V supplies - See Data Sheet for Additional Information
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Data Sheets
Application Notes
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD7657BSTZ-1 Production | 64 ld LQFP (10x10mm) | OTH 160 | -40 to 85C | 12.14 | 10.29 | Y |
| AD7657BSTZ-1-RL Production | 64 ld LQFP (10x10mm) | REEL 1500 | -40 to 85C | 0 | 10.29 | Y |
| AD7657YSTZ-1 Production | 64 ld LQFP (10x10mm) | OTH 160 | -40 to 125C | 13.83 | 11.72 | Y |
| AD7657YSTZ-1-RL Production | 64 ld LQFP (10x10mm) | REEL 1500 | -40 to 125C | 0 | 11.72 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD7657-1SDZ | Evaluation Board | -1 | Y |
| EVAL-SDP-CB1Z | Evaluation Controller Board | 99 | Y |
Reference Materials
