Analog Devices AD7091R Product Info

• Fast throughput rate of 1 MSPS
• Specified for V_DD of 2.7 V to 5.25 V
• Logic voltage V_DRIVE of 1.65 V to 5.25 V
• INL of ±1 LSB maximum
• Analog input range of 0 V to V_REF
• Ultralow power
  
  • 349 µA typical at 3 V and 1 MSPS
  • 264 nA typical at 3 V in power-down mode
• Internal 2.5 V reference, ±4.5 ppm/°C typical drift
• Wide input bandwidth
• Flexible power/throughput rate management
• High speed serial interface
• SPI^®/QSPI™/MICROWIRE™/DSP compatible
• BUSY indicator
• Power-down mode
• 10-lead, 3 mm × 2 mm LFCSP and 10-lead MSOP packages
• Temperature range of −40°C to +125°C

The AD7091R is a 12-bit successive approximation analog-to-digital converter (ADC) that offers ultralow power consumption (typically 349 µA at 3 V and 1 MSPS) while achieving fast throughput rates (1 MSPS with a 50 MHz SCLK). Operating from a single 2.7 V to 5.25 V power supply, the part contains a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 MHz. The AD7091R also features an on-chip conversion clock, accurate reference, and high speed serial interface.

The conversion process and data acquisition are controlled using a CONVST signal and an internal oscillator. The AD7091R has a serial interface that allows data to be read after the conversion while achieving a 1 MSPS throughput rate.

The AD7091R uses advanced design and process techniques to achieve very low power dissipation at high throughput rates. An on-chip, accurate 2.5 V reference is available

Product Highlights

1. Lowest Power 12-Bit SAR ADC Available.
2. On-Chip, Accurate 2.5 V Reference.
3. High Throughput Rate with Ultralow Power Consumption.
4. Flexible Power/Throughput Rate Management. Average power scales with the throughput rate. Power-down mode allows the average power consumption to be reduced when the device is not performing a conversion.
5. Single Supply Operation with V_DRIVE Function. The AD7091R operates from a single 2.7 V to 5.25 V supply. The V_DRIVE function allows the serial interface to connect directly to 1.8 V to 3.3 V processors.

Applications

• Battery-powered systems
  – Handheld meters
  – Medical instruments
  – Mobile communications
• Instrumentation and control systems
• Data acquisition systems
• Optical sensors