AD7195
4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
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Features
- AC or DC sensor excitation
- RMS noise: 8.5 nV at 4.7 Hz (gain = 128)
- 16 noise-free bits at 2.4 kHz (gain = 128)
- Up to 22.5 noise-free bits (gain = 1)
- Offset drift: 5 nV/°C
- Gain drift: 1 ppm/°C
- Specified drift over time
- 2 differential/4 pseudo differential input channels
- Automatic channel sequencer
- Programmable gain (1 to 128)
- Output data rate: 4.7 Hz to 4.8 kHz
- Internal or external clock
- Simultaneous 50 Hz/60 Hz rejection
- Power supply
- AVDD: 4.75 V to 5.25 V
- DVDD: 2.7 V to 5.25 V
- Current: 6 mA
- Temperature range: –40°C to +105°C
- Package: 32-lead LFCSP
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The AD7195 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC. The AD7195 contains ac excitation, which is used to remove dc-induced offsets from bridge sensors.
The device can be configured to have two differential inputs or four pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled, and the AD7195 sequentially converts on each enabled channel. This simplifies communication with the part. The on-chip 4.92 MHz clock can be used as the clock source to the ADC or, alternatively, an external clock or crystal can be used. The output data rate from the part can be varied from 4.7 Hz to 4.8 kHz.
The device has two digital filter options. The choice of filter affects the rms noise/noise-free resolution at the programmed output data rate, the settling time, and the 50 Hz/60 Hz rejection. For applications that require all conversions to be settled, the AD7195 includes a zero latency feature.
The part operates with a 5 V analog power supply and a digital power supply from 2.7 V to 5.25 V. It consumes a current of 6 mA. It is housed in a 32-lead LFCSP package.Applications
- Weigh scales
- Strain gage transducers
- Pressure measurement
- Temperature measurement
- Chromatography
- PLC/DCS analog input modules
- Data acquisition
- Medical and scientific instrumentation
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
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Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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AD7195
Documentation
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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 |
|---|---|---|---|
| AD7195BCPZ |
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
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| AD7195BCPZ-RL |
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
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| AD7195BCPZ-RL7 |
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
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- AD7195BCPZ
- Pin/Package Drawing
-
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD7195BCPZ-RL
- Pin/Package Drawing
-
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7195BCPZ-RL7
- Pin/Package Drawing
-
32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
May 20, 2024
- 23_0143
Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Feb 6, 2017
- 16_0234
Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts.
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Aug 6, 2014
- 13_0230
Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
May 20, 2024
- 23_0143
Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Feb 6, 2017
- 16_0234
Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts.
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Aug 6, 2014
- 13_0230
Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China
AD7195BCPZ
PRODUCTION
AD7195BCPZ-RL
PRODUCTION
AD7195BCPZ-RL7
PRODUCTION
Software & Part Ecosystem
Device Drivers
Mbed Support
Looking for Evaluation Software? You can find it here
| Parts | Product Life Cycle | Description | ||
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isoPower1 |
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PRODUCTION |
Isolated Switching Regulators (4/0 Channel Directionality) |
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Low Input Bias Current Op Amps (≤100 pA)2 |
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PRODUCTION |
1.8V, µPower, Zero-Drift, RRIO Dual Amplifier |
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PRODUCTION |
16V Dual Auto-Zero, Rail-to-Rail Output, Precision Amplifier |
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Positive Linear Regulators (LDO)1 |
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NOT RECOMMENDED FOR NEW DESIGNS |
High Accuracy anyCAP™ 200 mA Low Dropout Linear Regulator |
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Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C)1 |
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PRODUCTION |
Low Power, Precision, Auto-Zero Op Amp |
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Series Voltage References2 |
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PRODUCTION |
Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
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PRODUCTION |
Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
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| Parts | Product Life Cycle | Description |
|---|---|---|
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RECOMMENDED FOR NEW DESIGNS |
Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers |
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RECOMMENDED FOR NEW DESIGNS |
24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers |
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RECOMMENDED FOR NEW DESIGNS |
32-Bit, 10 kSPS, Sigma-Delta ADC with 100 µs Settling and True Rail-to-Rail Buffers |
Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits 2
EVAL-AD7195
OBSOLETE: AD7195 Evaluation Board
Product Detail
This evaluation board is obsolete and no longer recommended. The replacement board is the EVAL-AD7195ASDZ.
The EVAL-AD7195EBZ is a fully featured evaluation Board for the AD7195. The evaluation board can be operated in standalone mode ( either battery-powered or with external power supply) or connected to a PC via a standard USB interface. When operated with a PC, software is provided enabling the user to perform detailed analysis of the ADC's performance.
Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).
EVAL-AD7195ASDZ
Product Detail
The EVAL-AD7195ASDZ evaluation kit features the AD7195 which is 4.8 kHz ultralow noise 24-bit sigma-delta (Σ-Δ) ADCs. The on-chip low noise gain stage means that signals of small amplitude can interface directly to the ADC. The internal clock option provides a compact solution for low BW requirements.
The AD7195 ACE Plugin fully configures the AD7195 device register functionality and provides dc time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.
Applications
- PLC/DCS analog input modules
- Data acquisition
- Strain gage transducers
- Pressure measurement
- Temperature measurement
- Weigh scales
- Chromatography
- Medical and scientific instrumentation
Tools & Simulations 2
Virtual Eval - BETA
Design Tool
Design Tool
