AD7091R-4BRUZ-RL7

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1. DESCRIPTION

The AD7091R-4BRUZ-RL7 family is a multichannel 12-bit, ultralow power, successive approximation analog-todigital converter (ADC) that is available in two, four, or eight analog input channel options. The AD7091R-4BRUZ RL7 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-4BRUZ-RL7 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-4BRUZ-RL7 also feature an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a high speed serial interface. The AD7091R-4BRUZ-RL7 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-4BRUZ-RL7 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.

2. FEATURES

    1. Ultralow system power

        - Flexible power/throughput rate management

        - Normal mode 

           -1.4 mW at 1 MSPS

        - Power-down mode

           - 550 nA typical at VDD = 5.25 V

           - 435 nA typical at VDD = 3 V

        - Programmable ALERT interrupt pin (4-/8-channel models)

    2. 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

    3. 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

        - 16-lead, 20-lead, and 24-lead TSSOP packages

    4. Easy to use

        - SPI/QSPI™/MICROWIRE™/DSP compatible digital interface

        - Integrated programmable channel sequencer

        - BUSY indication available (4-/8-channel models)

    5. Built in features for control and monitoring applications

        - GPOx pins available (4-/8-channel models)

    6. Wide operating range

        - Temperature range: −40°C to +125°C

        - Specified for VDD of 2.7 V to 5.25 V

3. APPLICATIONS

    1. Battery-powered systems

    2. Personal digital assistants

    3. Medical instruments

    4. Mobile communications

    5. Instrumentation and control systems

    6. Data acquisition systems

    7. Optical sensors

    8. Diagnostic/monitoring functions