AD7195
RECOMMENDED FOR NEW DESIGNS4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
- Part Models
- 3
- 1ku List Price
- Starting From $8.86
Part Details
- 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
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
Documentation
Data Sheet 1
Application Note 4
Frequently Asked Question 1
Video 3
Circuit Note 1
Tutorial 1
Device Drivers 2
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 |
|---|---|---|---|
| AD7195BCPZ | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD7195BCPZ-RL | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD7195BCPZ-RL7 | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) |
| 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 | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Mbed Support 1
Device Drivers 2
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| isoPower 1 | ||
| ADUM3470 | PRODUCTION | Isolated Switching Regulators (4/0 Channel Directionality) |
| Low Input Bias Current Op Amps (≤100 pA) 2 | ||
| ADA4051-2 | PRODUCTION | 1.8V, µPower, Zero-Drift, RRIO Dual Amplifier |
| AD8639 | PRODUCTION | 16V Dual Auto-Zero, Rail-to-Rail Output, Precision Amplifier |
| Positive Linear Regulators (LDO) 1 | ||
| ADP3303 | NOT RECOMMENDED FOR NEW DESIGNS | High Accuracy anyCAP™ 200 mA Low Dropout Linear Regulator |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 1 | ||
| AD8539 | PRODUCTION | Low Power, Precision, Auto-Zero Op Amp |
| Series Voltage References 2 | ||
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD7172-2 | RECOMMENDED FOR NEW DESIGNS | Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers |
| AD7175-2 | RECOMMENDED FOR NEW DESIGNS | 24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers |
| AD7177-2 | RECOMMENDED FOR NEW DESIGNS | 32-Bit, 10 kSPS, Sigma-Delta ADC with 100 µs Settling and True Rail-to-Rail Buffers |
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
Open ToolDesign Tool 1
Evaluation Kits
OBSOLETE: AD7195 Evaluation Board
Resources
