AD7798
PRODUCTION3-Channel, Low Noise, Low Power, 16-Bit, Sigma Delta ADC with On-Chip In-Amp
- Part Models
- 2
- 1ku List Price
- Starting From $5.62
Overview
- RMSnoise:
27 nV at 4.17 Hz (AD7799)
65 nV at 16.7 Hz (AD7799)
40 nV at 4.17 Hz (AD7798)
85 nV at 16.7 Hz (AD7798) - Current: 380 μA typical
- Power-down: 1 μA maximum
- Low noise, programmable gain, instrumentation amp
- Internal clock oscillator
- Simultaneous 50 Hz/60 Hz rejection
- Reference detect
- Low-side power switch
- Programmable digital outputs
- Burnout currents
- Power supply: 2.7 V to 5.25 V
- Update rate: 4.17 Hz to 470 Hz 3 differential inputs
The AD7798 / AD7799 are low power, low noise, complete analog front ends for high precision measurement applications. The AD7798 / AD7799 contains a low noise, 16-/24-bit Σ-Δ ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 27 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.
On-chip features include a low-side power switch, reference detect, programmable digital output pins, burnout currents, and an internal clock oscillator. The output data rate from the part is software-programmable and can be varied from 4.17 Hz to 470 Hz.
The part operates with a power supply from 2.7 V to 5.25 V. The AD7798 consumes a current of 300 μA typical, whereas the AD7799 consumes 380 μA typical. Both devices are housed in a 16-lead TSSOP package.
APPLICATIONS
- Weigh scales
- Pressure measurement
- Strain gauge transducers
- Gas analysis
- Industrial process control
- Instrumentation
- Portable instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromotography 6-digit DVM
Documentation
Data Sheet 1
Application Note 13
Frequently Asked Question 1
Circuit Note 4
Device Drivers 2
Rarely Asked Question Page 1
Analog Dialogue 1
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 |
|---|---|---|---|
| AD7798BRUZ | 16-Lead TSSOP | ||
| AD7798BRUZ-REEL | 16-Lead TSSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 20, 2024 - 23_0143 Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process |
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| AD7798BRUZ | PRODUCTION | |
| AD7798BRUZ-REEL | PRODUCTION | |
|
Apr 5, 2021 - 21_0035 Amkor Philippines as an Alternate Site for TSSOP_4.4 |
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| AD7798BRUZ | PRODUCTION | |
| AD7798BRUZ-REEL | PRODUCTION | |
|
Jan 20, 2012 - 11_0218 Halogen Free Material Change for Certain TSSOP Products at Carsem |
||
| AD7798BRUZ | PRODUCTION | |
| AD7798BRUZ-REEL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Operational Amplifiers (Op Amps) 4 | ||
| AD8639 | PRODUCTION | 16V Dual Auto-Zero, Rail-to-Rail Output, Precision Amplifier |
| AD8539 | PRODUCTION | Low Power, Precision, Auto-Zero Op Amp |
| ADA4505-2 | PRODUCTION | 10 µA, RRIO, Zero Input Crossover Distortion Dual Op Amp |
| ADA4051-2 | PRODUCTION | 1.8V, µPower, Zero-Drift, RRIO Dual Amplifier |
| Voltage References 4 | ||
| ADR381 | PRODUCTION | 2.048 V and 2.5 V Bandgap Voltage References |
| ADR391 | PRODUCTION | 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
Tools & Simulations
Design Tool 1
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Open ToolEvaluation Kits
AD7798 Evaluation Board
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