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AD7782

Features: 2-Channel, 24-Bit - ADCPin Configurable (No Programmable Registers)Pin Selectable Input ChannelsPin Programmable Input Ranges (2.56 V or 160 mV)Fixed 19.79 Hz Update RateSimultaneous 50 Hz and 60 Hz Rejection24-Bit No Missing Codes18.5-Bit p-p Resolution (2.56 V Range)16.5-Bit p-p Resolu...

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SeekIC No. : 004270823 Detail

AD7782: Features: 2-Channel, 24-Bit - ADCPin Configurable (No Programmable Registers)Pin Selectable Input ChannelsPin Programmable Input Ranges (2.56 V or 160 mV)Fixed 19.79 Hz Update RateSimultaneous 50 Hz...

AD7782 Data Sheet

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Part Number:
AD7782
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:

2-Channel, 24-Bit - ADC
Pin Configurable (No Programmable Registers)
Pin Selectable Input Channels
Pin Programmable Input Ranges (2.56 V or 160 mV)
Fixed 19.79 Hz Update Rate
Simultaneous 50 Hz and 60 Hz Rejection
24-Bit No Missing Codes
18.5-Bit p-p Resolution (2.56 V Range)
16.5-Bit p-p Resolution (160 mV Range)
INTERFACE
Master or Slave Mode of Operation
Slave Mode
3-Wire Serial
SPI(TM), QSPI(TM), MICROWIRE(TM), and DSP-Compatible
Schmitt Trigger on SCLK
POWER
Specified for Single 3 V and 5 V Operation
Normal: 1.3 mA @ 3 V
Power-Down: 9 A
ON-CHIP FUNCTIONS
Rail-Rail Input Buffer and PGA




Application

Sensor Measurement
Industrial Process Control
Temperature Measurement
Pressure Measurements
Weigh Scales
Portable Instrumentation




Pinout

Connection Diagram

AD7782 Diagram




Specifications

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..0.3 V to +7 V
Analog Input Voltage to GND . . . . . . . . . . . . . . . .. 0.3 V to VDD + 0.3 V
Reference Input Voltage to GND . . . . . . . . . . . . . .. 0.3 V to VDD + 0.3 V
Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . . . .. .. .. .. . . . .. 30 mA
Digital Input Voltage to GND . . . . . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
Digital Output Voltage to GND . . . . . . . . . . . . . . . . .0.3 V to VDD + 0.3 V
Operating Temperature Range . . . . . . . . . . . . . . . . . . .40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . . . . . . . 150°C
TSSOP Package
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 97.9°C/W
JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . . 14°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . . . 220°C

Resolution (Bits) 24bit
T-Put Rate 19.79SPS
# Chan 2
Supply V Single(+3),Single(+5)
Pwr Diss 8.5mW
Interface Ser,SPI
Ain Range 0.32 V p-p,5.12 V p-p
SNR (dB) n/a
Pkg Type SOP





Description

The AD7782 is a complete analog front end for low-frequency measurement applications. The 24-bit sigma-delta ADC contains two fully differential analog input channels that can be config-
ured with a gain of 1 or 16 allowing full-scale input signal ranges of ±2.56 V or ±160 mV from a +2.5 V differential reference input.

The AD7782 has an extremely simple, read-only digital interface which can be operated in master mode or slave mode. There are no on-chip registers to be programmed. The input signal range and input channel selection are configured using two external pins.

The device AD7782 operates from a 32.768 kHz crystal with an on-chip PLL generating the required internal operating frequency. The output data rate from the part is fixed via the master clock at 19.79 Hz and provides simultaneous 50 Hz and 60 Hz rejection at this update rate. Eighteen-bit p-p resolution can be obtained at this update rate.

The part AD7782 operates from a single 3 V or 5 V supply. When operating from 3 V supplies, the power dissipation for the part is 3.9 mW. The AD7782 is available in a 16-lead TSSOP package.

Another part in the AD778x family is the AD7783. It is similar to the AD7782 except it has two integrated current sources and only one differential input channel.






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