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AD7490: 16-Channel, 1MSPS, 12-Bit ADC with Sequencer Data Sheet (Rev. E)9/24/2015PDF741 K
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AD7490-EP: Enhanced Product Data Sheet (Rev. B)9/24/2015PDF396 K
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AD7490-DSCC: Military Data Sheet9/24/2015
Overview
Features and Benefits
- Fast throughput rate: 1 MSPS
- Specified for VDD of 2.7 V to 5.25 V
- Low power at maximum throughput rates
- 5.4 mW maximum at 870 kSPS with 3 V supplies
- 12.5 mW maximum at 1 MSPS with 5 V supplies
- 16 (single-ended) inputs with sequencer
- Wide input bandwidth: 69.5 dB SNR at 50 kHz input frequency
- Flexible power/serial clock speed management
- No pipeline delays
- High speed serial interface, SPI/QSPI™/MICROWIRE™/ DSP compatible
- Full shutdown mode: 0.5 μA maximum
- 28-lead TSSOP and 32-lead LFCSP packages
- AEC-Q100 qualified for automotive applications
AD7490-EP supports defense and aerospace applications (AQEC standard)
- Download AD7490-EP Data Sheet (pdf)
- Military temperature range (−55°C to +125°C)
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
- V62/12635 DSCC Drawing Number
Product Details
The AD7490 is a 12-bit high speed, low power, 16-channel, successive approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1 MHz.
The conversion process and data acquisition are controlled using CS and the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS, and conversion is also initiated at this point. There are no pipeline delays associated with the part.
The AD7490 uses advanced design techniques to achieve very low power dissipation at high throughput rates. For maximum throughput rates, the AD7490 consumes just 1.8 mA with 3 V supplies, and 2.5 mA with 5 V supplies.
By setting the relevant bits in the control register, the analog input range for the part can be selected to be a 0 V to REFIN input or a 0 V to 2 × REFIN input, with either straight binary or twos complement output coding. The AD7490 features 16 single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequen-tially. The conversion time is determined by the SCLK frequency because this is also used as the master clock to control the conversion.
The AD7490 is available in a 32-lead LFCSP and a 28-lead TSSOP package.
APPLICATIONS
- Multichannel system monitoring
- Battery-powered equipment
- Power line monitoring
- Data acquisition, instrumentation, and process control
Product Categories
Product Lifecycle
Production
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.
Evaluation Kits (1)
Documentation & Resources
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AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015PDF427 K
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AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)2/14/2015PDF299 kB
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UG-446: Evaluating the AD7490 Successive Approximation ADC3/18/2013PDF2 M
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The Data Conversion Handbook, 20051/2/2005
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MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design2/14/2015PDF152 kB
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MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"3/20/2009PDF144 kB
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MT-001: Taking the Mystery out of the Infamous Formula, "SNR=6.02N + 1.76dB", and Why You Should Care3/4/2009PDF94 kB
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
Software & Systems Requirements
Evaluation Software
Product Recommendations
AD7490 Companion Parts
Recommended Driver Amplifiers
- For single supply, high speed, low power: AD8031, ADA4841-1.
- For high performance, high speed: ADA4899-1, ADA4897-1, AD8021.
- For low distortion, low noise, dual supplies: AD8599.
- For low frequency and low bias current: ADA4627-1.
- For precision, low noise, single supply: AD8605.
Recommended External Voltage References
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.
PCN-PDN Information
Support & Discussions
AD7490 Discussions
RE: EVAL-AD7490 layout data
20 week(s) ago in Precision ADCs
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.