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AD7780BRUZ
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：24
- Sampling Rate (Per Second)：16.7
- Number of Inputs：1
- Input Type：Differential
- Data Interface：SPI
- Configuration：PGA-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 5.25V
- Voltage - Supply, Digital：2.7V ~ 5.25V
- Features：PGA
- Operating Temperature：-40°C ~ 105°C
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Mounting Type：Surface Mount
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Overview
The AD7780BRUZ is a 24-bit Sigma-Delta analog-to-digital converter in a 16-lead TSSOP package. It features pin-programmable gain (1 or 128) and filter response (10 Hz or 16.7 Hz update rates). The device operates on a single supply from 2.7 V to 5.25 V, consuming 115 μA at Gain 1 and 330 μA at Gain 128. It includes an internal oscillator, bridge power-down switch, and a 2-wire serial interface.
Feature Summary
- Pin-programmable gain selection between unity and 128
- Integrated low-side bridge power-down switch for sensor isolation
- Internal clock oscillator eliminates external timing components
- Simultaneous 50 Hz/60 Hz line frequency rejection
Applications
- Weigh scales
- Pressure measurement
- Industrial process control
- Portable instrumentation
Procurement Notes
Verify the specific suffix against official documentation to confirm package type and reel configuration. Confirm availability status as distribution channels may list end-of-life items. Ensure the ordering information matches the required voltage range and temperature specifications for the target application environment.
Selection Notes
Select this component for applications requiring high resolution with minimal external circuitry. The pin-programmable architecture simplifies hardware design by removing configuration registers. Consider the settling time requirements when choosing between the 10 Hz and 16.7 Hz filter options based on system speed needs.
Part Context
This part belongs to the AD7780 family of ultralow power sigma-delta ADCs manufactured by Analog Devices. It is designed specifically for bridge sensor front-end applications. The BRUZ suffix indicates the 16-lead TSSOP surface-mount package variant within the product line.
Replacement Considerations
Consult official Analog Devices documentation for verified substitute part numbers. Do not assume functional equivalence with other ADC families without cross-referencing pinouts and electrical specifications.
FAQ
How is the gain configured?
Gain is set via the dedicated GAIN pin. A logic low selects Gain 128, while a logic high selects Gain 1.
What is the function of the BPDSW pin?
The Bridge Power-Down Switch (BPDSW) connects the load cell to ground when PDRST is high, allowing current flow. It opens when PDRST is low to minimize power consumption.
Can the digital and analog supplies differ?
Yes, DVDD and AVDD are independent. Both must be between 2.7 V and 5.25 V, but they do not need to be equal.
