AD7787

PRODUCTION

Low Power, 2-Channel 24-Bit Sigma-Delta ADC

Data Sheet (Rev. A) Product Selection Table

Part Models: 2
1ku List Price: Starting From $6.51

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Overview

Power
Supply: 2.5 V to 5.25 V current
Normal: 75 µA max
Power-down: 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
Interface
3-wire serial
SPI^®, QSPI^™, MICROWIRE^™ and DSP compatible
Schmitt trigger on SCLK

The AD7787 is a low power, complete analog front end for low frequency measurement applications. It contains a low noise 24-bit Σ-Δ ADC with one differential input and one single-ended 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 will scale with the clock frequency.

The part 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.

APPLICATIONS

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

Part Models: 2
1ku List Price: Starting From $6.51

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD7787BRMZ	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD7787BRMZ-RL	10-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 1, 2025 - 25_0162 Gold to Copper Wire Conversion
		PCN25_0162_Form Material_Report Qualification Results Summary Qualification Results Summary Qualification Results Summary
AD7787BRMZ	PRODUCTION
AD7787BRMZ-RL	PRODUCTION
Jan 26, 2016 - 15_0176 Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines
		PCN15_0176_Form Material_Report Detailed Change Description Qualification Results Summary Qualification Results Summary
AD7787BRMZ	PRODUCTION
AD7787BRMZ-RL	PRODUCTION
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products
		PCN10_0006_Form Material_Report Qualification Report Summary Qualification Report Summary
AD7787BRMZ	PRODUCTION