AD7194
PRODUCTION8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
- Part Models
- 3
- 1ku List Price
- Starting From $8.11
Part Details
- Fast settling filter option
- 8 differential/16 pseudo differential input channels
- RMS noise: 11 nV at 4.7 Hz (gain = 128)
- 15.5 noise-free bits at 2.4 kHz (gain = 128)
- Up to 22 noise-free bits (gain = 1)
- Offset drift: ±5 nV/°C
- Gain drift: ±1 ppm/°C
- 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
- 4 general-purpose digital outputs
- Power supply
- AVDD: 3 V to 5.25 V
- DVDD: 2.7 V to 5.25 V
- Current: 4.65 mA
- Temperature range: −40°C to +105°C
- Package: 32-lead LFCSP
- Interface
- 3-wire serial
- SPI, QSPI™, MICROWIRE™, and DSP compatible
- Schmitt trigger on SCLK
The AD7194 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 interface directly to the ADC.
The device can be configured to have eight differential inputs or sixteen pseudo differential inputs. 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 a very flexible digital filter, including a fast settling option. Variables such as output data rate and settling time are dependent on the option selected. For applications that require all conversions to be settled, the AD7194 includes zero latency.
The part operates with a power supply from 3 V to 5.25 V. It consumes a current of 4.65 mA, and it is housed in a 32-lead LFCSP package.
Applications
- PLC/DCS analog input modules
- Data acquisition
- Strain gage transducers
- Pressure measurement
- Temperature measurement
- Flow measurement
- Weigh scales
- Chromatography
- Medical and scientific instrumentation
Documentation
Data Sheet 1
User Guide 1
Application Note 3
Technical Articles 1
Frequently Asked Question 1
Video 3
Tutorial 1
Device Drivers 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 |
|---|---|---|---|
| AD7194BCPZ | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD7194BCPZ-REEL | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD7194BCPZ-REEL7 | 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 |
||
| AD7194BCPZ | PRODUCTION | |
| AD7194BCPZ-REEL | PRODUCTION | |
| AD7194BCPZ-REEL7 | PRODUCTION | |
|
Oct 21, 2016 - 16_0229 Assembly Transfer of Select LFCSP Products to ASE Korea |
||
| AD7194BCPZ | PRODUCTION | |
| AD7194BCPZ-REEL | PRODUCTION | |
| AD7194BCPZ-REEL7 | PRODUCTION | |
|
May 11, 2014 - 13_0231 Assembly Transfer of Select 4x4 and 5x5mm LFCSP Products to STATS ChipPAC China. |
||
| AD7194BCPZ | PRODUCTION | |
| AD7194BCPZ-REEL | PRODUCTION | |
| AD7194BCPZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Mbed Support 1
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| isoPower 2 | ||
| ADUM5401 | PRODUCTION | Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (3/1 channel directionality) |
| ADUM5402 | PRODUCTION | Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (2/2 channel directionality) |
| Low Input Bias Current Op Amps (≤100 pA) 1 | ||
| AD8628 | PRODUCTION | Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Operational Amplifier |
| Positive Linear Regulators (LDO) 1 | ||
| ADP3303 | NOT RECOMMENDED FOR NEW DESIGNS | High Accuracy anyCAP™ 200 mA Low Dropout Linear Regulator |
| Series Voltage References 3 | ||
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR425 | PRODUCTION | Ultraprecision, Low Noise, 5.00 V XFET® Voltage Reference |
| Single-Ended to Differential Amplifiers 1 | ||
| ADA4940-1 | PRODUCTION | Ultralow Power, Low Distortion ADC Driver |
| Standard Digital Isolators 2 | ||
| ADUM1411 | PRODUCTION | Quad-Channel Digital Isolator |
| ADUM1412 | PRODUCTION | Quad-Channel Digital Isolator |
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD7175-8 | RECOMMENDED FOR NEW DESIGNS | 24-Bit, 8-/16-Channel, 250 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers |
| AD7172-4 | RECOMMENDED FOR NEW DESIGNS | Low Power, with 4- or 8-channel, 24-bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers |
| AD7173-8 | RECOMMENDED FOR NEW DESIGNS |
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC |
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 2
Evaluation Kits
OBSOLETE: AD7194 Evaluation Board
Resources
Evaluation Kit for AD7194