AD7366:  True Bipolar Input, Dual 12-Bit, 2-Channel, Simultaneous Sampling SAR ADC

The AD7366/AD7367* are dual 12-bit/14-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs) that feature throughput rates up to 1 MSPS. The device contains two ADCs, ...More

AD7366:  True Bipolar Input, Dual 12-Bit, 2-Channel, Simultaneous Sampling SAR ADC

Product Description

The AD7366/AD7367* are dual 12-bit/14-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs) that feature throughput rates up to 1 MSPS. The device contains two ADCs, each preceded by a 2-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier.

The AD7366/AD7367 are fabricated on the Analog Devices, Inc., industrial CMOS process (iCMOS**), which is a technology platform combining the advantages of low and high voltage CMOS. The iCMOS process allows the AD7366/AD7367 to accept high voltage bipolar signals in addition to reducing power consumption and package size. The AD7366/AD7367 can accept true bipolar analog input signals in the ±10 V range, ±5 V range, and 0 V to 10 V range.

The AD7366/AD7367 have an on-chip 2.5 V reference that can be disabled to allow the use of an external reference. If a 3 V reference is applied to the DCAPA and DCAPB pins, the AD7366/AD7367 can accept a true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS supplies are required for the ±12 V input range.

Product Highlights

  1. The AD7366/AD7367 can accept true bipolar analog input signals, as well as ±10 V, ±5 V, ±12 V (with external reference), and 0 V to 10 V unipolar signals.
  2. Two complete ADC functions allow simultaneous sampling and conversion of two channels.
  3. 1 MSPS serial interface: SPI-/QSPI-/DSP-/MICROWIRE-compatible interface.

* Protected by U.S. Patent No. 6,731,232.

** iCMOS Process Technology. For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher voltage levels, iCMOS is a technology platform that enables the development of analog ICs capable of 30 V and operating at ±15 V supplies while allowing dramatic reductions in power consumption and package size, and increased ac and dc performance.

Data Sheet, Rev. A, 9/07

Features

  • Dual 12-bit/14-bit, 2-channel ADC
  • True bipolar analog inputs
  • Programmable input ranges:
    ±10 V, ±5 V, 0 V to 10 V
    ±12 V with 3 V external reference
  • Throughput rate: 1 MSPS
  • Simultaneous conversion with read in less than 1 μs
  • Low current consumption:
    8.3 mA typical in normal mode
    320 nA typical in shutdown mode
  • High analog input impedance
  • AD7366
    72 dB SNR at 50 kHz input frequency
    12-bit no missing codes
  • AD7367
    76 dB SNR at 50 kHz input frequency
    14-bit no missing codes
  • Accurate on-chip reference: 2.5 V ± 0.2%
  • −40°C to +85°C operation
  • High speed serial interface Compatible with SPI®, QSPI™, MICROWIRE™, and DSP

Verified Circuits Using This Part

Verified Circuits are designed for ease of use and proven to work by ADI applications engineers. To learn more about Verified Circuits from ADI, please visit Verified Circuits Home.

Circuit Diagram

Diagrams

AD7366 Diagram
Functional Block Diagram for AD7366

Specifications

Resolution (Bits) 12bit
T-Put Rate 1MSPS
# Chan 4
Supply V Multi(±12, +5),Multi(±15, +5)
Pwr Diss (max) 88.8mW
Interface Ser,SPI
Ain Range Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 5.0V,Uni (Vref) x 4,Uni 10V
SNR (dB) 72dB
Pkg Type SOP

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7934 12 1.5MSPS 4 16mW
AD7366 12 1MSPS 4 88.8mW
AD7866 12 1MSPS 4 24mW
AD7924 12 1MSPS 4 13.5mW
AD7914 10 1MSPS 4 13.5mW
AD7352 12 3MSPS 2 45mW
AD7356 12 5MSPS