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AD7718BRUZ
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 28TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：24
- Sampling Rate (Per Second)：1.37k
- Number of Inputs：4/5, 8/10
- Input Type：Differential, Pseudo-Differential
- Data Interface：SPI, DSP
- Configuration：MUX-PGA-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital：2.7V ~ 3.6V, 5V
- Features：PGA
- Operating Temperature：-40°C ~ 85°C
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
- Mounting Type：Surface Mount
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Overview
The AD7718BRUZ is a complete analog front-end for low frequency measurement applications, featuring a 24-bit Sigma-Delta ADC with a programmable gain front end. It supports 8 or 10 channels configured as fully-differential or pseudo-differential inputs. The device operates from a single 3 V or 5 V supply and utilizes a 32 kHz crystal with an on-chip PLL. Key specifications include simultaneous 50 Hz and 60 Hz rejection, factory calibration, and a typical power dissipation of 3.84 mW at 3 V. It is housed in a 28-lead TSSOP package.
Feature Summary
- Factory-calibrated architecture supporting absolute and ratiometric measurements via VREF Select
- Programmable gain front end with rail-to-rail input buffer capability
- Integrated digital filter providing simultaneous 50 Hz and 60 Hz line frequency rejection
- Configurable operation optimized for either analog performance or channel throughput
Applications
- Industrial Process Control
- Pressure Transducers
- Portable Instrumentation
- Smart Transmitters
Procurement Notes
Verify the specific suffix BRUZ corresponds to the TSSOP-28 package and industrial temperature range (-40°C to +85°C). Confirm that the component is sourced from authorized distributors to ensure authenticity, as this is a legacy Analog Devices product. Check current availability status as older revisions may have limited stock.
Selection Notes
Select the AD7718BRUZ when 24-bit resolution is required for high-precision low-frequency signal acquisition. Ensure the application supports the necessary external 32 kHz crystal oscillator. Compare against the AD7708BRUZ if 16-bit resolution is sufficient, as they are pin-for-pin compatible. Verify that the input signal range fits within the programmable gain amplifier limits.
Part Context
The AD7718BRUZ belongs to the AD7708/AD7718 family of low voltage, low power analog-to-digital converters. This series is designed for multiplexed data acquisition systems requiring high accuracy. The BRUZ suffix specifically denotes the TSSOP surface-mount package variant within the broader AD7718 product line.
Replacement Considerations
The AD7708BRUZ is a pin-compatible alternative offering 16-bit resolution instead of 24-bit. No other direct substitutes are documented in the provided datasheet.
