16-Bit, 250 kSPS PulSAR® ADC in MSOP/QFN
Power dissipation scales linearly with throughput.
The SPI-compatible serial interface also features the ability, using the SDI input, to daisy chain several ADCs on a single 3-wire bus or provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO.
The AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.
- Battery-powered equipment
- Medical instruments
- Mobile communications
- Personal digital assistants (PDAs)
- Data acquisition
- Process controls
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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.
Recommended Digital Isolators
- For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation , we recommend the ADUM3401 .
- For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V) , we recommend the ADUM3481 .
- For SPI Interface, lowest power, 2.5 kVrms isolation , we recommend the ADUM1401 .
- For SPI Interface, low power, 5.0 kVrms isolation , we recommend the ADUM4401 .
Recommended Driver Amplifiers
- For precision, low power, low distortion applications , we recommend the ADA4841-1, ADA4896-2, AD8031 or the AD8031 .
- For low frequency, precision, low bias current applications , we recommend the ADA4627-1, ADA4637-1 or the AD8610 .
- For high frequency, low noise, low distortion applications , we recommend the ADA4897-1 or the AD8021 .
Recommended External Voltage Reference
Product Selection Guide
SAR ADC & Driver Quick-Match Guide
Find drivers for ADI's most popular single-ended and differential SAR ADCs based on your specific application...
Voltage Reference Design for Precision Successive-Approximation ADCs
(Analog Dialogue, Volume 47 – June 2013)
Front-End Amplifier and RC Filter Design for a Precision SAR...
High Speed Op Amp Drives a 16-Bit, 1-MSPS Differential-Input A/D Converter
(Analog Dialogue, Vol. 36, No. 6, November/December 2002)
MS-2210: Designing Power Supplies for High Speed ADC
MS-1779: Nine Often Overlooked ADC Specifications
Analog-to-digital converters (ADCs) have many specifications; some are more important for a given application than...
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