AD7707: Complete Analog Front End for Low Frequency Measurement Applications
The AD7707 is a complete analog front end for low frequency measurement applications. This three-channel device can accept either low level input signals directly from a transducer or high level (±10 ...More
AD7707: Complete Analog Front End for Low Frequency Measurement Applications
Product Description
The AD7707 is a complete analog front end for low frequency measurement applications. This three-channel device can accept either low level input signals directly from a transducer or high level (±10 V) signals and produce a serial digital output. It employs a sigma-delta conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate.
Features
- Charge Balancing ADC
- 16 Bits No Missing Codes
- 0.003% Nonlinearity - High Level (±10 V) and Low Level (±10 mV) Input Channels
- True Bipolar ±100 mV Capability on Low Level Input Channels Without Requiring Charge Pumps
- Programmable Gain Front End Gains from 1 to 128
- Three-Wire Serial Interface
- SPI®, QSPI™, MICROWIRE™ and DSP Compatible
- Schmitt Trigger Input on SCLK - Ability to Buffer the Analog Input
- 2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
- Power Dissipation 1 mW max @ 3 V
- Standby Current 8 µA max
- 20-Lead SOIC and TSSOP Packages
Diagrams
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- Symbols and Footprints
Functional Block Diagram for AD7707
Complete Analog Front End for Low Frequency Measurement Applications
Functional Block Diagram for AD7707
AD7682 - 16-Bit, 4-Channel, 250 kSPS PulSAR® ADC
EVAL-CED - Converter Evaluation and Development (CED) Board
AD7401A - Isolated Sigma-Delta Modulator
AD7262 - True Differential, Dual, 1 MSPS, 14-Bit/12-Bit, 2-Channel SAR ADC With PGA
| Part# | Res | Throughput Rate | # of Inputs | Operating Pwr Diss |
|---|---|---|---|---|
| AD7707 | 16 | 500SPS | 3 | 3.75mW |
| AD7706 | 16 | 500SPS | 3 | 6.5mW |
| AD7792 | 16 | 470SPS | 3 | 2.5mW |
| AD7798 | 16 | 470SPS | 3 | 2mW |
| AD7887 | 12 | 125KSPS | 2 | 3.5mW |
| AD7450 | 12 | 1MSPS | 1 | 1.3mW |
| AD7457 | 12 | 100KSPS | 1 | 3mW |
| AD7466 | 12 | 200KSPS | 1 | 900µW |
| AD7467 | 10 | 200KSPS | 1 | 630µW |
| AD7888 | 12 | 125KSPS | 8 | 3.5mW |
| AD7468 | 8 | 200KSPS | 1 | 570µW |
AD7707 Model Options
Help
- Pre-Release: The model has not been released to general production, but samples may be available.
- Production: The model is currently being produced, and generally available for purchase and sampling.
- Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
- Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
For detailed drawings and chemical composition please consult our Package Site
- Commercial: 0 to +70 degrees Celsius
- Military : -55 to +125 degrees Celsius
- Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
- Automotive: -40 to +125 degrees Celsius
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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