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AD7609
8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC
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Overview
Features and Benefits
- 8 simultaneously sampled inputs
- True differential inputs
- True bipolar analog input ranges: ±20 V, ±10 V
- Single 5 V analog supply and 2.3 V to 5.25 V VDRIVE
- Fully integrated data acquisition solution
- Analog input clamp protection
- Input buffer with 1 MΩ analog input impedance
- Second-order antialiasing analog filter
- On-chip accurate reference and reference buffer
- 18-bit ADC with 200 kSPS on all channels
- Oversampling capability with digital filter
- Flexible parallel/serial interface
- SPI/QSPI™/MICROWIRE™/DSP compatible
- Performance
- 7 kV ESD rating on analog input channels
- 98 dB SNR, −107 dB THD
- Dynamic range: up to 105 dB typical
- Low power: 100 mW
- Standby mode: 25 mW
- 64-lead LQFP package
Product Details
The AD7609 is an 18-bit, 8-channel, true differential, simultaneous sampling analog-to-digital data acquisition system (DAS). The part contains analog input clamp protection, a second-order antialiasing filter, a track-and-hold amplifier, an 18-bit charge redistribution successive approximation analog-to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces.
The AD7609 operates from a single 5 V supply and can accommodate ±20 V and ±10 V true bipolar differential input signals while sampling at throughput rates up to 200 kSPS for all channels. The input clamp protection circuitry can tolerate voltages up to ±16.5 V on each analog input pin. The AD7609 has 1 MΩ analog input impedance regardless of sampling frequency. The single supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies. The AD7609 antialiasing filter has a −3 dB cutoff frequency of 32 kHz and provides 40 dB antialias rejection when sampling at 200 kSPS. The flexible digital filter is pin driven, yields improvements in SNR, and reduces the −3 dB bandwidth.
Applications
- Power line monitoring and protection systems
- Multiphase motor control
- Instrumentation and control systems
- Multiaxis positioning systems
- Data acquisition systems (DAS)
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Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation
Software & Systems Requirements
Evaluation Software
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Tools & Simulations
Product Recommendations
AD7609 Companion Parts
Recommended Digital Isolators
- For isolated power in 3.3V or 5V outputs: ADUM5000.
- For high performance, low power, bidirectional communication with integrated isolated power: ADUM5402.
- For high performance, low power, bidirectional communication: ADUM1402.
Recommended External 2.5V Voltage Reference
Reference Materials
Informational (1)
Technical Articles (1)
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.
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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.