AD7381
PRODUCTION4MSPS Dual Simultaneous Sampling, 14-BIT SAR ADC, Differential Input
- Part Models
- 3
- 1ku List Price
- Starting From $15.96
Part Details
- 16-bit/14-bit ADC family
- Dual simultaneous sampling
- Fully differential analog inputs
- 4 MSPS throughput conversion rate
- SNR (typical)
- 92.5 dB, VREF = 3.3 V external at AD7380 (16-bit)
- 85.4 dB, VREF = 3.3 V external at AD7381 (14-bit)
- 101 dB with ×16 OSR
- On-chip oversampling function
- Resolution boost function
- INL (maximum)
- 2.0 LSBs at 16-bit
- 1.0 LSB at 14-bit
- 2.5 V internal reference
- High speed serial interface
- −40°C to +125°C operation
- 16-lead LFCSP, 3 mm × 3 mm
- Wide common-mode range
- Alert function
The AD7380/AD7381 are a 16-bit and 14-bit pin-compatible family of dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a 3.0 V to 3.6 V power supply and feature throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and converted on the falling edge of CS.
An integrated on-chip oversampling block improves dynamic range and reduces noise at lower bandwidths. A buffered internal 2.5 V reference is included. Alternatively, an external reference up to 3.3 V can be used.
The conversion process and data acquisition use standard control inputs allowing simple interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply.
The AD7380/AD7381 are available in a 16-lead lead frame chip scale package (LFCSP) with operation specified from −40°C to +125°C.
Product highlights
- Dual simultaneous sampling and conversion with two complete ADC functions.
- Pin-compatible product family.
- High 4 MSPS throughput rate.
- Space saving 3 mm × 3 mm LFCSP.
- An integrated oversampling block to increase dynamic range, reduce noise, and reduce SCLK speed requirements.
- Differential analog inputs with wide common-mode range.
- Small sampling capacitor reduces amplifier drive burden.
Applications
- Motor control position feedback
- Motor control current sense
- Sonar
- Power quality
- Data acquisition systems
- Erbium doped fiber amplifier (EDFA) applications
- I and Q demodulation
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Frequently Asked Question 3
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 |
|---|---|---|---|
| AD7381BCPZ-R2 | 16-Lead LFCSP (3mm x 3mm x 0.75mm w/ EP) | ||
| AD7381BCPZ-RL | 16-Lead LFCSP (3mm x 3mm x 0.75mm w/ EP) | ||
| AD7381BCPZ-RL7 | 16-Lead LFCSP (3mm x 3mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 8, 2019 - 19_0126 AD7380/AD7381 Data Sheet Specification Change |
||
| AD7381BCPZ-RL | PRODUCTION | |
| AD7381BCPZ-RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
-
Precision, Lowest Power Applications -
Precision, Low-Density Application -
High frequency, Low Noise, Low Distortion Applications
| Parts | Product Life Cycle | Description |
|---|---|---|
| High Speed Op Amps (Bandwidth ≥ 50MHz) 2 | ||
| ADA4807-2 | RECOMMENDED FOR NEW DESIGNS |
3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier |
| ADA4807-1 | RECOMMENDED FOR NEW DESIGNS |
3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier |
| Low Noise Op Amps (≤ 10nV/√Hz) 1 | ||
| ADA4896-2 | RECOMMENDED FOR NEW DESIGNS | 1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
| Negative Linear Regulators (LDO) 1 | ||
| ADP7182 | RECOMMENDED FOR NEW DESIGNS | –28 V, −200 mA, Low Noise, Linear Regulator |
| Positive Linear Regulators (LDO) 2 | ||
| ADP7104 | RECOMMENDED FOR NEW DESIGNS | 20 V, 500 mA, Low Noise, CMOS LDO |
| ADP166 | PRODUCTION | Very Low Quiescent Current, 150 mA, LDO Regulator |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 1 | ||
| ADA4805-2 | RECOMMENDED FOR NEW DESIGNS | Dual, 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier |
| Series Voltage References 2 | ||
| ADR4533 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 3.3V Voltage Reference |
| ADR4525 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 2.5V Voltage Reference |
| Single-Ended to Differential Amplifiers 1 | ||
| ADA4940-2 | PRODUCTION | Ultralow Power, Low Distortion ADC Driver |
| Parts | Product Life Cycle | Description |
|---|---|---|
| ADV7383 | RECOMMENDED FOR NEW DESIGNS | Car Camera Bus Receiver with Parallel Video Output |
Tools & Simulations
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
Open ToolSignal Chain Designer - BETA
Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.
Open ToolIBIS Model 1
Evaluation Kits
Evaluation board for the AD7380/AD7381 Dual Simultaneous Sampling 16/14-Bit SAR ADC.