Not the part you were looking for?
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
Features
- Small signal bandwidth: 260 MHz
- Ultralow power 1.25mA
- Extremely low harmonic distortion
- −122 dB THD at 50 kHz
- −96 dB THD at 1 MHz
- Low input voltage noise: 3.9 nV/√Hz
- 0.35 mV maximum offset voltage
- Balanced outputs
- Settling time to 0.1%: 34 ns
- Rail-to-rail output: −VS + 0.1 V to +VS − 0.1 V
- Adjustable output common-mode voltage
- Flexible power supplies: 3 V to 7 V (LFCSP)
- Disable pin to reduce power consumption
- Available in LFCSP and SOIC packages
.svg?rev=fd385c90e2cf4716ae9a8c8d20e6b8e3&la=en&h=24&w=24&hash=A302DF48F94BAAA11877AF223F27157A){kind=icon}
The ADA4940-1 / ADA4940-2 are low noise, low distortion differential amplifiers with very low power consumption. They are an ideal choice for driving low power, high resolution, high performance SAR and sigma-delta (Σ-Δ) analog-to-digital converters (ADCs) with resolutions up to 18 bits from dc to 1 MHz on only 1.25 mA of quiescent current. The adjustable level of the output common-mode voltage allows the ADA4940-1/ ADA4940-2 to match the input common-mode voltage of multiple ADCs. The internal common-mode feedback loop provides exceptional output balance, as well as suppression of even-order harmonic distortion products.
With the ADA4940-1 / ADA4940-2, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier. The ADA4940-1 / ADA4940-2 are fabricated using Analog Devices, Inc., complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 3.9 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4940-1 / ADA4940-2 make them well suited for a variety of data acquisition and signal processing applications.
The ADA4940-1 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4940-2 is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinout is optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4940-1 / ADA4940-2 are specified to operate over the −40°C to +125°C temperature range.
Applications
- Low power ADC drivers
- Single-ended-to-differential converters
- Differential buffers
- Line drivers
- Medical Imaging
- Industrial Process Control
- Portable Electronics
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
{{modalTitle}}
{{modalDescription}}
{{dropdownTitle}}
- {{defaultSelectedText}} {{#each projectNames}}
- {{name}} {{/each}} {{#if newProjectText}}
-
{{newProjectText}}
{{/if}}
{{newProjectTitle}}
{{projectNameErrorText}}
ADA4940-1
Documentation
Filters
1 Applied
-
All
-
Data Sheet
-
User Guide
-
Technical Articles
-
Application Note
-
All
-
English
-
Japanese
-
Chinese
Data Sheet
2
User Guide
2
Technical Articles
10
HTML
HTML
HTML
HTML
HTML
HTML
HTML
HTML
HTML
Application Note
6
HTML
HTML
HTML
HTML
HTML
HTML
Documentation
Data Sheet 1
User Guide 2
Application Note 2
Technical Articles 5
Low Power Precision Data Acquisition Signal Chain for Space Constrained Applications
How High Performance Modular Instruments Enable Greater Applications and Smaller Form Factor
Low Power Precision Data Acquisition Signal Chain For Space Constrained Applications
Noise Analysis of Precision Data Acquisition Signal Chain
Exploring Different SAR ADC Analog Input Architectures
Tutorial 1
Product Selection Guide 1
Analog Dialogue 1
Rarely Asked Question Page 6
Webcast 1
Video
2
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 |
|---|---|---|---|
| ADA4940-1ACPZ-R2 |
16-Lead LFCSP (3mm x 3mm w/ EP)
|
|
|
| ADA4940-1ACPZ-R7 |
16-Lead LFCSP (3mm x 3mm w/ EP)
|
|
|
| ADA4940-1ACPZ-RL |
16-Lead LFCSP (3mm x 3mm w/ EP)
|
|
|
| ADA4940-1ARZ |
8-Lead SOIC
|
|
|
| ADA4940-1ARZ-R7 |
8-Lead SOIC
|
|
|
| ADA4940-1ARZ-RL |
8-Lead SOIC
|
|
- ADA4940-1ACPZ-R2
- Pin/Package Drawing
-
16-Lead LFCSP (3mm x 3mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- ADA4940-1ACPZ-R7
- Pin/Package Drawing
-
16-Lead LFCSP (3mm x 3mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- ADA4940-1ACPZ-RL
- Pin/Package Drawing
-
16-Lead LFCSP (3mm x 3mm w/ EP)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- ADA4940-1ARZ
- Pin/Package Drawing
-
8-Lead SOIC
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- ADA4940-1ARZ-R7
- Pin/Package Drawing
-
8-Lead SOIC
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- ADA4940-1ARZ-RL
- Pin/Package Drawing
-
8-Lead SOIC
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Feb 13, 2014
- 14_0038
Conversion of 3x3mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.
ADA4940-1ACPZ-R2
PRODUCTION
ADA4940-1ACPZ-R7
PRODUCTION
ADA4940-1ACPZ-RL
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Feb 13, 2014
- 14_0038
Conversion of 3x3mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.
ADA4940-1ACPZ-R2
PRODUCTION
ADA4940-1ACPZ-R7
PRODUCTION
ADA4940-1ACPZ-RL
PRODUCTION
Software & Part Ecosystem
Evaluation Kits 3
EVAL-AD7768-1
AD7768-1 Evaluation Board
Product Detail
The EV-AD7768-1FMCZ evaluation kit features the AD7768-1 24-bit, 256 kSPS analog-to-digital converter (ADC). The EVAD7768-1FMCZ board connects to the USB port of the PC via the EVAL-SDP-CH1Z motherboard. By default, power is supplied from the EVAL-SDP-CH1Z supply, which is regulated to 5 V and 3.3 V to supply the AD7768-1 and support components.
The EV-AD7768-1FMCZ software fully configures the AD7768-1 device register functionality and provides dc and ac time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.
The EV-AD7768-1FMCZ is an evaluation board that allows the user to evaluate the features of the ADC. The user PC software executable controls the AD7768-1 over USB through the system demonstration platform (EVAL-SDP-CH1Z).
Resources
1.41 M
AMC-ADA4940-1ARZ
Amplifier Mezzanine Card for ADA4940-1
Product Detail
The Analog Devices, Inc., amplifier mezzanine card (AMC) analog-to-digital converter (ADC) driver evaluates the performance of amplifiers in 8-lead, single and dual SOIC, 6- lead single SOT23, 8-lead dual MSOP, and 16-lead LFCSP packages. This add on board can be inserted on ADC evaluation boards using its 7-pin header. Figure 1 shows the AMC mounted on an Analog Devices, Inc., ADC evaluation board.
The AMC can support any of Analog Devices operational amplifiers and ADC drivers in different packages. The user can configure the ADC driver as a Sallen-Key low-pass, high-pass, or band-pass filter, as a multiple feedback low-pass, high-pass, or band-pass filter, or as an inverting and noninverting operational amplifier. The user can also configure the AMC to drive a singleended, fully differential, or a single-ended signal to a differential ADC.
Optimized power and ground planes ensure low noise and high speed operation. Component placement and power supply bypassing are optimized for maximum circuit flexibility and performance. The AMC evaluation board accepts 0402 or 0603 surface mount technology (SMT) components, 1206 bypass capacitors, and 2.54 mm headers.
All components are placed on the primary side. No components are placed on the secondary side.
EVAL-FDA-1
Universal Evaluation Board for Single Differential Amplifiers
Product Detail
Resources
200.15 K
382.52 K
SPICE Model
Reference Designs 1
CN0513
20-Bit, 1.8 MSPS, ±2.5 ppm INL, Low Drift, High Accuracy Data Acquisition Solution
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Data acquisition solution fully characterized over 0°C to 70°C
- Guaranteed 20-bit no missing codes
- INL: ±2 ppm, DNL: ±0.25 ppm
- Throughput: 1.8 MSPS
- Offset error drift: ±3.5 ppm/°C; gain error drift: ±6 ppm/°C
- SNR: 98 dB at G = 1, 92 dB at G = 10, fIN = 1 kHz
- THD: −120 dB at G = 1, −116 dB at G = 10, fIN = 1 kHz
- Oversampled dynamic range: 102 dB at 900 kSPS, OSR = 2
- Software programmable bipolar input ranges (±1 V to ±10 V)
- Allows single-ended and differential signals
- CMRR: 92 dB typical
- GΩ input impedance allows direct interface with sensors
- Ease of use features reduce system power and complexity
- ADC Input overvoltage clamp protection sinks up to 50 mA
- On-board 5 V reference and buffer
- First conversion accurate, no latency/pipeline delay
- Fast conversion time allows low SPI clock rates
- SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
