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AD7787

Features: ·Supply: 2.5 V to 5.25 V operation·Normal mode: 75 µA max·Power-down mode: 1 µA max·RMS noise: 1.1 µV at 9.5 Hz update rate·19.5-bit p-p resolution (22 bits effective resolution)·Integral nonlinearity: 3.5 ppm typical·Simultaneous 50 Hz and 60 Hz rejection·Internal cloc...

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SeekIC No. : 004270828 Detail

AD7787: Features: ·Supply: 2.5 V to 5.25 V operation·Normal mode: 75 µA max·Power-down mode: 1 µA max·RMS noise: 1.1 µV at 9.5 Hz update rate·19.5-bit p-p resolution (22 bits effective res...

AD7787 Data Sheet

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Part Number:
AD7787
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:

·Supply: 2.5 V to 5.25 V operation
·Normal mode: 75 µA max
·Power-down mode: 1 µA max
·RMS noise: 1.1 µV at 9.5 Hz update rate
·19.5-bit p-p resolution (22 bits effective resolution)
·Integral nonlinearity: 3.5 ppm typical
·Simultaneous 50 Hz and 60 Hz rejection
·Internal clock oscillator
·Rail-to-rail input buffer
·VDD monitor channel
·Temperature range: −40°C to +105°C
·10-lead MSOP




Application

·Smart transmitters
·Battery applications
·Portable instrumentation
·Sensor measurement
·Temperature measurement
·Pressure measurement
·Weigh scales
·4 to 20 mA loops




Pinout

AD7787 Diagram

Connection Diagram




Specifications

Resolution (Bits) 24bit
T-Put Rate 120SPS
# Chan 2
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss 800W
Interface Ser,SPI
Ain Range (2Vref) p-p,(Vref) p-p,Uni (Vref)
SNR (dB) n/a
Pkg Type SOP


Parameter Rating
VDD to GND
Analog Input Voltage to GND
Reference Input Voltage to GND
Total AIN/REFIN Current (Indefinite)
Digital Input Voltage to GND
Digital Output Voltage to GND
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
MSOP
JA Thermal Impedance
JC Thermal Impedance
Lead Temperature, Soldering (10 sec)
IR Reflow, Peak Temperature		 −0.3 V to +7 V
−0.3 V to VDD + 0.3 V
−0.3 V to VDD + 0.3 V
30 mA
−0.3 V to VDD + 0.3 V
−0.3 V to VDD + 0.3 V
−40°C to +105°C
−65°C to +150°C
150°C
206°C/W
44°C/W
300°C
220°C





Description

The AD7787 is a low power, complete analog front end for low frequency measurement applications. It contains a low noise 24-bit - ADC with one differential input and one singleended input that can be buffered or unbuffered. 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 from the part is software programmable and can be varied from 9.5 Hz to 120 Hz, with the rms noise equal to 1.1 µV at the lower update rate. The internal clock frequency can be divided by a factor of 2, 4, or 8, which leads to a reduction in the current consumption. The update rate, cutoff frequency, and settling time scales with the clock frequency.

The part AD7787 operates with a power supply from 2.5 V to 5.25 V. When operating from a 3 V supply, the power dissipation for the part is 225 µW maximum. It is housed in a 10-lead MSOP.






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