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AD7691

Features: 18-bit resolution with no missing codes Throughput: 400 kSPS (AD7690), 250 kSPS (AD7691) INL: ±1 LSB typ (±4 ppm of FSR), ±2.5 LSB max Dynamic range: 102 dB @ 400 kSPS Oversampled Dynamic range: 128 dB @1 kSPS (AD7690)Noise-free-code-resolution: 20 bits @ 1 kSPSEffective resolution: 22....

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SeekIC No. : 004270691 Detail

AD7691: Features: 18-bit resolution with no missing codes Throughput: 400 kSPS (AD7690), 250 kSPS (AD7691) INL: ±1 LSB typ (±4 ppm of FSR), ±2.5 LSB max Dynamic range: 102 dB @ 400 kSPS Oversampled Dynamic...

AD7691 Data Sheet

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Part Number:
AD7691
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

18-bit resolution with no missing codes
Throughput: 400 kSPS (AD7690), 250 kSPS (AD7691)
INL: ±1 LSB typ (±4 ppm of FSR), ±2.5 LSB max
Dynamic range: 102 dB @ 400 kSPS
Oversampled Dynamic range: 128 dB @1 kSPS (AD7690)
Noise-free-code-resolution: 20 bits @ 1 kSPS
Effective resolution: 22.7 bits @ 1 kSPS
S/(N + D): 102 dB @ 1 kHz
THD: −120 dB @ 1 kHz
True differential analog input range : ±VREF
0 V to VREF with VREF up to VDD on both inputs
No pipeline delay
Single-supply 5 V (AD7690), 2.7V or 5V (AD7691) operation with 1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and BUSY indicator
Power dissipation
5 mW @ 5 V/100 kSPS, 50 µW @ 5 V/1kSPS
Stand-by current: 1 nA
10-lead package: MSOP (MSOP-8 size) and
QFN (LFCSP), 3 mm * 3 mm same space as SOT-23 Pin-for-pin compatible with the 16-Bit AD7693, AD7688, AD7687




Application

Battery-powered equipment
Data acquisitions
Seismic Data Acquisition Systems
DVMs
Instrumentation
Medical instruments




Pinout

Connection Diagram




Specifications

Parameter Rating
Analog Inputs
IN+1, IN−1

REF
Supply Voltages
VDD, VIO to GND
VDD to VIO
Digital Inputs to GND
Digital Outputs to GND
Storage Temperature Range
Junction Temperature
JA Thermal Impedance
JC Thermal Impedance
Lead Temperature Range
Vapor Phase (60 sec)
Infrared (15 sec)
GND − 0.3 V to VDD + 0.3 V
or ±130 mA
GND − 0.3 V to VDD + 0.3 V

−0.3 V to +7 V
±7 V
−0.3 V to VIO + 0.3 V
−0.3 V to VIO + 0.3 V
−65°C to +150°C
150°C
200°C/W (MSOP-10)
44°C/W (MSOP-10)

215°C
220°C





Description

The AD7690/AD7691 is a 18-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between IN+ and IN− pins. The voltages on these pins usually swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy chain several ADCs on a single, 3-wire bus and provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.

The AD7690/AD7691 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.






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