AD7923:  4-Channel 200 kSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP

The AD7923 is a 12-bit, high speed, low power, 4-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 200 kSPS. The ...More

AD7923:  4-Channel 200 kSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP

Product Description

The AD7923 is a 12-bit, high speed, low power, 4-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 200 kSPS. The part contains a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 8 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 AD7923 uses advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7923 consumes 0.85 mA with 3 V supplies and, with 5V supplies, the current consumption is 1 mA.

Features

  • Fast Throughput Rate: 200 kSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • Low Power:
    - 1.95 mW max at 200 kSPS with 3 V Supplies
    - 5 mW max at 200 kSPS with 5 V Supplies
  • Four (Single Ended) Inputs with Sequencer
  • Flexible Power/Serial Clock Speed Management
  • Wide Input Bandwidth: 69.5 dB SNR at 50 kHz Input Frequency
  • No Pipeline Delays
  • High Speed Serial Interface SPI® /QSPI™ /MICROWIRE™ /DSP Compatible
  • Shutdown Mode: 0.5 µA max
  • 16-Pin TSSOP Package

Diagrams

AD7923 Diagram
Functional Block Diagram for AD7923

Specifications

Resolution (Bits) 12bit
T-Put Rate 200kSPS
# Chan 4
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss (max) 7.5mW
Interface Ser,SPI
Ain Range Uni (Vref),Uni (Vref) x 2
SNR (dB) 70dB
Pkg Type SOP

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7923 12 200KSPS 4 7.5mW
AD7450 12 1MSPS 1 1.3mW
AD7452 12 555KSPS 1 7.25mW
AD7453 12 555KSPS 1 7.25mW
AD7466 12 200KSPS 1 900µW
AD7927 12 200KSPS 8 7.5mW
AD7924 12 1MSPS 4 13.5mW