Overview
Features and Benefits
- Ultralow system power
- Flexible power/throughput rate management
- High performance
- 1 MSPS throughput with no latency/pipeline delay
- SNR: 70 dB typical at 10 kHz input frequency
- THD: −80 dB typical at 10 kHz input frequency
- INL: ±0.7 LSB typical, ±1.0 LSB maximum
- Small system footprint
- On-chip accurate 2.5 V reference, 5 ppm/°C typical drift
- MUXOUT/ADCIN to allow single buffer amplifier
- Daisy-chain mode
- 16-lead, 20-lead, and
24-lead 4 mm × 4 mm LFCSP packages - See data sheet for additional features.
Product Details
The AD7091R-2 / AD7091R-4 / AD7091R-8 family is a multichannel 12-bit, ultralow power, successive approximation analog-to-digital converter (ADC) that is available in two, four, or eight analog input channel options. The AD7091R-2 / AD7091R-4 / AD7091R-8 operate from a single 2.7 V to 5.25 V power supply and are capable of achieving a sampling rate of 1 MSPS.
The AD7091R-2 / AD7091R-4 / AD7091R-8 family offers up to eight single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. The AD7091R-2 / AD7091R-4 / AD7091R-8 also feature an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a high speed serial interface.
The AD7091R-2 / AD7091R-4 / AD7091R-8 have a serial port interface (SPI) that allows data to be read after the conversion while achieving a 1 MSPS throughput rate. The conversion process and data acquisition are controlled using the CONVST pin.
The AD7091R-2 / AD7091R-4 / AD7091R-8 use advanced design techniques to achieve ultralow power dissipation at high throughput rates. They also feature flexible power management options. An on-chip configuration register allows the user to set up different operating conditions. These include power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins. The MUXOUT and ADCIN pins allow signal conditioning of the multiplexer output prior to acquisition by the ADC.
APPLICATIONS
- Battery powered systems
- Personal digital assistants
- Medical instruments
- Mobile communications
- Instrumentation and control systems
- Data acquisition systems
- Optical sensors
- Diagnostic/monitoring functions
Product Categories
Markets and Technologies
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
-
MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"3/20/2009PDF144 kB
-
SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
Tools & Simulations
IBIS Models
Product Recommendations
AD7091R-2 Companion Parts
Recommended Driver Amplifiers
- For low frequency and low bias current: ADA4627-1, ADA4637-1, AD8610.
- For precision, low power, rail-to-rail output: ADA4841-1, ADA4896-2, AD8031.
- For high frequency, low noise, low distortion: ADA4899-1, ADA4897-1, AD8021.
Recommended External 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.
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Evaluation Boards
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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.