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AD4002 SOP-8
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AD4002

18-Bit, 2 MSPS Precision Pseudo Differential SAR ADC

Manufacturer :
Analog Devices, Inc
Package/Case :
SOP-8
Product Categories :
Precision A/D Converters ; Single Channel A/D Converters
Datasheet:
AD4002 PDF
RoHs Status:
Lead free/RoHS Compliant
In-stock:
36300

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AD4002 Product Details

The AD4002 is a low noise, low power, high speed, 18-bit, 2 MSPS precision successive approximation register (SAR) analog-to-digital converter (ADC). It incorporates ease of use features that lower the signal chain power, reduce signal chain complexity, and enable higher channel density. The high-Z mode, coupled with a long acquisition phase, eliminates the need for a dedicated high power, high speed ADC driver, thus broadening the range of low power precision amplifiers that can drive this ADC directly while still achieving optimum performance. The input span compression feature enables the ADC driver amplifier and the ADC to operate off common supply rails without the need for a negative supply while preserving the full ADC code range. The low serial peripheral interface (SPI) clock rate requirement reduces the digital input/output power consumption, broadens processor options, and simplifies the task of sending data across digital isolation.

Operating from a 1.8 V supply, the AD4002 samples an analog input (IN+) between 0 V to VREF with respect to a ground sense (IN−) with VREF ranging from 2.4 V to 5.1 V. The AD4002 consumes only 14 mW at 2 MSPS with a minimum of 75 MHz SCK rate in turbo mode and achieves ±3.2 LSB INL maximum, no missing codes at 18 bits with 95 dB SNR. The reference voltage is applied externally and can be set independently of the supply voltage.

The SPI-compatible versatile serial interface features seven different modes including the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. The AD4002 is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD4002 is available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C. The device is pin compatible with the 18-bit, 2 MSPS AD4003.

Feature

  • Throughput: 2 MSPS maximum
  • INL: ±3.2 LSB maximum
  • Guaranteed 18-bit no missing codes
  • Low power
    • 9.75 mW at 2 MSPS (VDD only)
    • 70 μW at 10 kSPS, 14 mW at 2 MSPS (total)
  • SNR: 95 dB typical at 1 kHz, 95 dB typical at 100 kHz
  • THD: -125 dB typical at 1 kHz, −108 dB typical at 100 kHz
  • Ease of use features reduce system power and complexity
    • Input overvoltage clamp circuit
    • Reduced nonlinear input charge kickback
    • High-Z mode
    • Long acquisition phase
    • Input span compression
    • Fast conversion time allows low SPI clock rates
    • SPI-programmable modes, read/write capability, status word
  • Pseudo differential (single-ended) analog input range: 0 V to VREF with VREF between 2.4 V to 5.1 V
  • Single 1.8 V supply operation with 1.71 V to 5.5 V logic interface
  • SAR architecture: no latency/pipeline delay
  • Guaranteed operation: -40°C to 125°C
  • Serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
  • Ability to daisy-chain multiple ADCs and busy indicator
  • 10-lead package: 3 mm × 3 mm LFCSP, 3 mm × 4.90 mm MSOP
 

Applications

  • Automatic test equipment
  • Machine automation
  • Medical equipment
  • Battery-powered equipment
  • Precision data acquisition systems

AD4002 Pinout
(Picture: Pinout)

AD4002 Block Diagram
(Picture: Diagram)

Technical Parameters

Channels 1 Device Architecture SAR
Resolutionbits 18 Input Type Pseudo-Differential
Sample Ratemax | SPS 2M Data Output Interface Serial SPI
ADC SNR in dBFStyp | dBFS 95 Powertyp | W 14m
INL in LSBtyp | LSBs 0.8

AD4002 Documents

  • AD4002 Technical Documentation/Data sheet

AD4002 Related Products

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Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized...
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