AD7788:  16-Bit, Single-Channel, Ultra Low Power, Sigma Delta A/D Converter

The AD7788/AD7789 are low-power, complete analog front ends for low frequency measurement applications. The device consumes 65 µA of current typically when operated with a 3 V power supply and 75 µA ...More

AD7788:  16-Bit, Single-Channel, Ultra Low Power, Sigma Delta A/D Converter

Product Description

The AD7788/AD7789 are low-power, complete analog front ends for low frequency measurement applications. The device consumes 65 µA of current typically when operated with a 3 V power supply and 75 µA typical when operated with a 5 V power supply. The AD7789 contains a 24-bit S-D ADC with one differential input, which is unbuffered. The AD7788 is a 16-bit version of the AD7789. The AD7788 has a peak-to-peak resolution of 16 bits while the AD7789 has a peak to peak resolution of 19 bits, which is equivalent to an effective resolution of 21.5 bits.

The device operates from an internal clock. Therefore, the user does not have to supply a clock source to the device. The output data rate is 16.6 Hz which gives simultaneous 50 Hz/60 Hz rejection. Power supply monitoring can also be performed with the part.

The part can be used in single conversion mode whereby the device powers up, performs a single conversion and then returns to powerdown mode. Alternatively, it can be operated in continuous mode. In continuous conversion mode, the part can be configured to continuously read i.e. the conversions are placed on the serial bus automatically as soon as a conversion is complete (the user does not need to write to the ADC to read the data), assuming that the serial clock is applied to the device.

The AD7788/AD7789 is housed in a 10-lead MSOP package.

Features

  • 16-bit resolution
  • Power
    - Supply: 2.5 V to 5.25 V operation
    - Normal: 75 µA maximum
    - Power-down: 1 µA maximum
  • RMS noise: 1.5 µV
  • 16-bit p-p resolution
  • Integral nonlinearity: 3.5 ppm typical
  • Simultaneous 50 Hz and 60 Hz rejection
  • Internal clock oscillator
  • VDD monitor channel
  • 10-lead MSOP

Diagrams

AD7788 Diagram
Functional Block Diagram for AD7788

Specifications

Resolution (Bits) 16bit
T-Put Rate 16.6SPS
# Chan 1
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss (max) 400µW
Interface Ser,SPI
Ain Range (2Vref) p-p
SNR (dB) n/a
Pkg Type SOP

AD7656-1 - 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC

AD7657-1 - 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 14-Bit ADC

AD7264 - True Differential, Dual, 1 MSPS, 14-Bit/12-Bit, 2-Channel SAR ADC With PGA

AD7658-1 - 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 12-Bit ADC

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7788 16 16.6SPS 1 400µW
AD7151 12 100SPS 1 300µW
AD7789 24 16.6SPS 1 400µW
AD7790 16 120SPS 1 800µW
AD7796 16 123SPS 1 1.6mW
AD7683 16 100KSPS 1 6mW
AD7684 16 100KSPS 1 6mW
AD7694 16 250KSPS 1 6.3mW
AD7715 16 500SPS 1 9.5mW
AD7980 16 1MSPS 1 10mW
AD7983 16 1.33MSPS 1 12mW
Pricing, Packaging & Availability

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  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Production Availability
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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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