AD7890
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AD7890

LC2MOS 8-Channel, 12-Bit Serial Data Acquisition System

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Info: : PRODUCTION tooltip
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Part Details
Part Models 17
1ku List Price Starting From $19.27
Features
  • Fast 12-bit ADC with 5.9 µs conversion time
  • Eight single-ended analog input channels
  • Selection of input ranges:
    ±10 V for AD7890-10
    0 V to 4.096 V for AD7890-4
    0 V to 2.5 V for AD7890-2
  • Allows separate access to multiplexer and ADC
  • On-chip track/hold amplifier
  • On-chip reference
  • High-speed, flexible, serial interface
  • Single supply, low-power operation (50 mW max)
  • Power-down mode (75 µW typ)
Additional Details
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The AD7890 is an 8-channel 12-bit data acquisition system. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a 2.5 V reference, and a high speed, serial interface. The part operates from a single 5 V supply and accepts an analog input range of ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), and 0 V to 2.5 V (AD7890-2).

The multiplexer on the part is independently accessible. This allows the user to insert an antialiasing filter or signal conditioning, if required, between the multiplexer and the ADC. This means that one antialiasing filter can be used for all eight channels. Connection of an external capacitor allows the user to adjust the time given to the multiplexer settling to include any external delays in the filter or signal conditioning circuitry.

Output data from the AD7890 is provided via a high speed bidirectional serial interface port. The part contains an on-chip control register, allowing control of channel selection, conversion start, and power-down via the serial port. Versatile, high speed logic ensures easy interfacing to serial ports on microcontrollers and digital signal processors.

In addition to the traditional dc accuracy specifications such as linearity, full-scale, and offset errors, the AD7890 is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.

Power dissipation in normal mode is low at 30 mW typical and the part can be placed in a standby (power-down) mode if it is not required to perform conversions. The AD7890 is fabricated in Analog Devices, Inc.'s Linear Compatible CMOS (LC2MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in a 24-lead, 0.3" wide, plastic or ceramic dual-in-line package or in a 24-lead small outline package (SOIC_W).

PRODUCT HIGHLIGHTS

  1. Complete 12-Bit Data Acquisition System-on-a-Chip. The AD7890 is a complete monolithic ADC combining an 8-channel multiplexer, 12-bit ADC, 2.5 V reference, and a track/hold amplifier on a single chip.
  2. Separate Access to Multiplexer and ADC. The AD7890 provides access to the output of the multiplexer allowing one antialiasing filter for 8 channels—a considerable savings over the 8 antialiasing filters required if the multiplexer is internally connected to the ADC.
  3. High Speed Serial Interface. The part provides a high speed serial interface for easy connection to serial ports of microcontrollers and DSP processors.
Part Models 17
1ku List Price Starting From $19.27

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7890ANZ-10
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AD7890ANZ-4
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AD7890ARZ-10
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AD7890ARZ-10REEL
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AD7890ARZ-2
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AD7890ARZ-2REEL
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AD7890ARZ-4
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AD7890ARZ-4REEL
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AD7890BNZ-2
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AD7890BRZ-10
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AD7890BRZ-10REEL
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AD7890BRZ-2
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AD7890BRZ-2REEL
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AD7890BRZ-4REEL
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AD7890SQ-10
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AD7890SQ-2
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AD7890SQ-4
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Part Models

Product Lifecycle

PCN

Mar 7, 2019

- 19_0046

Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek

Aug 19, 2009

- 07_0024

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

AD7890ANZ-10

PRODUCTION

AD7890ANZ-4

PRODUCTION

AD7890BNZ-2

PRODUCTION

Aug 4, 2010

- 10_0117

Halogen Free Material Change for SOIC_W Products at Carsem

AD7890ARZ-10

PRODUCTION

AD7890ARZ-10REEL

PRODUCTION

AD7890ARZ-2

PRODUCTION

AD7890ARZ-2REEL

PRODUCTION

AD7890ARZ-4

PRODUCTION

AD7890ARZ-4REEL

PRODUCTION

AD7890BRZ-10

PRODUCTION

AD7890BRZ-10REEL

PRODUCTION

AD7890BRZ-2

PRODUCTION

AD7890BRZ-2REEL

PRODUCTION

AD7890BRZ-4REEL

PRODUCTION

Nov 7, 2012

- 12_0199

Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages.

Nov 9, 2011

- 11_0050

Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines

AD7890SQ-10

AD7890SQ-2

PRODUCTION

AD7890SQ-4

Nov 9, 2011

- 11_0182

Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines

AD7890SQ-10

AD7890SQ-2

PRODUCTION

AD7890SQ-4

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 7, 2019

- 19_0046

arrow down

Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek

Aug 19, 2009

- 07_0024

arrow down

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

AD7890ANZ-10

PRODUCTION

AD7890ANZ-4

PRODUCTION

AD7890BNZ-2

PRODUCTION

Aug 4, 2010

- 10_0117

arrow down

Halogen Free Material Change for SOIC_W Products at Carsem

AD7890ARZ-10

PRODUCTION

AD7890ARZ-10REEL

PRODUCTION

AD7890ARZ-2

PRODUCTION

AD7890ARZ-2REEL

PRODUCTION

AD7890ARZ-4

PRODUCTION

AD7890ARZ-4REEL

PRODUCTION

AD7890BRZ-10

PRODUCTION

AD7890BRZ-10REEL

PRODUCTION

AD7890BRZ-2

PRODUCTION

AD7890BRZ-2REEL

PRODUCTION

AD7890BRZ-4REEL

PRODUCTION

Nov 7, 2012

- 12_0199

arrow down

Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages.

Nov 9, 2011

- 11_0050

arrow down

Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines

AD7890SQ-10

AD7890SQ-2

PRODUCTION

AD7890SQ-4

Nov 9, 2011

- 11_0182

arrow down

Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines

AD7890SQ-10

AD7890SQ-2

PRODUCTION

AD7890SQ-4

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