Datasheet for AD7783:
- Manufacturer Part Number : AD7783
- Manufacturer : AD
- Description : Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC with Excitation Current Sources
- Series : AD7783
- Reference Price : USD 3.544
- Our Price : We have a better price, contact us by email
- Product Type : Precision A/D Converters
- Function : Single Channel A/D Converters
- Current Suggest : Production
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : AD7783
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- Single-Channel, 24-Bit Σ-Δ ADC
- Pin Configurable (No Programmable Registers)
- ISOURCE SelectTM
- 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®, QSPI™, MICROWIRE™, 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 µA
- ON-CHIP FUNCTIONS
-- Rail-to-Rail Input Buffer and PGA
The AD7783 is a complete analog front end for low frequencymeasurement applications. The 24-bit sigma-delta ADC containsone fully differential input channel that can be configuredwith 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.It also contains two 200 mA integrated current sources.
The AD7783 has an extremely simple, read-only digital interfacethat can be operated in master mode or slave mode.There are no on-chip registers to be programmed. The inputsignal range and current source selection are configured usingtwo external pins.
The device operates from a 32.768 kHz crystal with an on-chipPLL generating the required internal operating frequency. Theoutput data rate from the part is fixed via the master clock at19.79 Hz and provides simultaneous 50 Hz and 60 Hz rejectionat this update rate. At this update rate, 18-bit p-p resolution canbe obtained.
The part operates from a single 3 V or 5 V supply. When operatingfrom 3 V supplies, the power dissipation for the part is 3.9 mW. The AD7783 is available in a 16-lead TSSOP.
Another part in the AD778x family is the AD7782. It is similarto the AD7783 except it has no integrated current sources andtwo differential input channels.
Applications
- Sensor Measurement
- Industrial Process Control
- Temperature Measurement
- Pressure Measurement
- Weigh Scales
- Portable Instrumentation
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.