AD4695
RECOMMENDED FOR NEW DESIGNS16-Bit, 16-Channel, 500 kSPS, Easy Drive Multiplexed SAR ADC
- Part Models
- 3
- 1ku List Price
- Starting From $11.01
Part Details
- Easy Drive
- Reduced analog input and reference drive requirements
- On-chip reference buffer (WLCSP only)
- Overvoltage protection up to 5 mA on each analog input
- Long acquisition phase, ≥71.5% (715 ns/1000 ns) of cycle time at 1 MSPS
- High performance
- Sample rate: 500 kSPS (AD4695) or 1 MSPS (AD4696)
- INL: ±1.0 LSB maximum
- Guaranteed 16-bit, no missing codes
- SINAD: 93 dB typical, fIN = 1 kHz
- Oversampled dynamic range: 111.2 dB, OSR = 64
- Small footprint, high channel density
- 32-lead 5 mm × 5 mm LFCSP
- 36-ball 2.96 mm × 2.96 mm WLCSP
- Easy Drive features support system level designs with fewer components
- Enhanced digital functionality
- First conversion accurate, no latency or pipeline delay
- Fast conversion time and dual-/quad-SDO modes allow low SPI clock rates
- Customizable channel sequencer
- On-chip oversampling and decimation
- Threshold detection alerts
- Offset and gain correction
- Autonomous conversion (autocycle) mode
- 1.14 V to 1.98 V logic SPI
- Low power
- 8 mW at fS = 1 MSPS and 4 mW at fS = 500 kSPS
- 4 μW standby power dissipation with the internal LDO disabled
- Internal LDO enables 2.7 V to 5.5 V, single analog supply operation
- Wide operating temperature range: −40°C to +125°C
The AD4695/AD4696 are compact, high accuracy, low power, 16-channel, 16-bit, 500 kSPS/1 MSPS, multiplexed input precision, successive approximation register (SAR) analog-to-digital converters (ADCs) with Easy Drive features and extensive digital functionality.
The AD4695/AD4696 are optimal for use in space constrained, multichannel, precision data acquisition systems and monitoring circuits. The AD4695/AD4696 feature a true 16-bit SAR ADC core with no missing codes, a 16-channel, low crosstalk multiplexer, a flexible channel sequencer, overvoltage protection clamp circuits on each analog input, on-chip oversampling and decimation, threshold detection and alert indicators, and an autonomous conversion (autocycle) mode.
The AD4695/AD4696 Easy Drive features relax the drive requirements of the analog front end (AFE) and reference circuitry. Analog input high-Z mode and reference input high‑Z mode simplify system designs, reduce component count, and increase channel density by removing the need for dedicated high speed ADC drivers and reference buffers. The WLCSP option of the AD4695/AD4696 includes an internal reference buffer, which provides a true, buffered reference input.
Input overvoltage protection clamps on each analog input protect the AD4695/AD4696 from overvoltage events and prevent overvoltage events on one channel from degrading performance on other channels (see Figure 27 in the data sheet).
Advanced digital functionality makes the AD4695/AD4696 compatible with a variety of low power digital hosts. The low serial peripheral interface (SPI) clock rate requirements, on-chip customizable channel sequencers, and oversampling and decimation reduce the burden on the digital host system. Autocycle mode and threshold detection features enable low power, interrupt driven firmware design by performing conversions autonomously and generating alerts based on channel specific threshold limits.
The AD4695/AD4696 are available in a 5 mm × 5 mm 32-lead lead frame chip scale package (LFCSP) and a 2.96 mm × 2.96 mm 36-ball wafer level chip scale package (WLCSP) with operation specified from −40°C to +125°C.
APPLICATIONS
- Photodiode monitoring
- Medical instrumentation
- Vital signs monitoring
- Electronic test and measurement
- Automated test equipment
- Instrumentation and process control
- Battery-powered equipment
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Device Drivers 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 |
|---|---|---|---|
| AD4695BCBZ-RL7 | 36-Ball WLCSP (2.96mm x 2.96mm x 0.50mm) | ||
| AD4695BCPZ | 32-Lead LFCSP (5mm x 5mm w/ EP) | ||
| AD4695BCPZ-RL7 | 32-Lead LFCSP (5mm x 5mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 21, 2023 - 23_0053 AD4695/6/7/8 Family Datasheet Specification Update |
||
| AD4695BCBZ-RL7 | PRODUCTION | |
| AD4695BCPZ | PRODUCTION | |
| AD4695BCPZ-RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 2
Mbed Support 3
Evaluation Software 0
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Hardware Ecosystem
-
Low Input Bias Current, Low Noise Applications -
Precision, Low Power, Low Distortion Applications -
Precision, Lowest Power Applications
| Parts | Product Life Cycle | Description |
|---|---|---|
| General Purpose Op Amps 1 | ||
| ADA4692-4 | PRODUCTION | Low Power, 3.6 MHz, Low Noise, Rail-to-Rail Output, Operational Amplifiers |
| High Speed Op Amps (Bandwidth ≥ 50MHz) 1 | ||
| ADA4807-4 | RECOMMENDED FOR NEW DESIGNS |
3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier |
| High Voltage Op Amps ≥12V 2 | ||
| ADA4084-4 | RECOMMENDED FOR NEW DESIGNS |
30 V, Low Noise, Rail-to-Rail Input/Output, Low Power Operational Quad Amplifier |
| ADA4077-4 | RECOMMENDED FOR NEW DESIGNS | 4 MHz, 7 nV/√Hz, Low Offset and Drift, High Precision Quad Amplifier |
| Internal Power Switch Boost Regulators 1 | ||
| ADP5070 | RECOMMENDED FOR NEW DESIGNS | 1 A/0.6 A, DC-to-DC Switching Regulator with Independent Positive and Negative Outputs |
| Low Input Bias Current Op Amps (≤100 pA) 1 | ||
| ADA4610-4 | RECOMMENDED FOR NEW DESIGNS | Low Noise, Precision, Rail-to-Rail Output, JFET Quad Op Amplifiers |
| Positive Linear Regulators (LDO) 2 | ||
| ADP7142 | RECOMMENDED FOR NEW DESIGNS | 40 V, 200 mA, Low Noise, CMOS LDO Linear Regulator |
| ADP7118 | RECOMMENDED FOR NEW DESIGNS | 20 V, 200 mA, Low Noise, CMOS LDO Linear Regulator |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 2 | ||
| ADA4096-4 | RECOMMENDED FOR NEW DESIGNS | 30 V, Micropower, Overvoltage Protection, Rail-to-Rail Input/Output Quad Op Amplifier |
| 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 12 | ||
| ADR3525 | RECOMMENDED FOR NEW DESIGNS | Micropower, Precision, Auto Qualified 2.5V Voltage Reference |
| ADR3533 | RECOMMENDED FOR NEW DESIGNS | Micropower, Precision, Auto Qualified 3.3V Voltage Reference |
| ADR3440 | PRODUCTION | Micro-Power, High-Accuracy 4.096V Voltage Reference |
| ADR3450 | PRODUCTION | Micro-Power, High-Accuracy 5.0V Voltage Reference |
| ADR441 | PRODUCTION | Ultralow Noise, LDO XFET® 2.5V Voltage Reference w/Current Sink and Source |
| ADR443 | PRODUCTION | Ultralow Noise, LDO XFET® 3.0V Voltage Reference w/Current Sink and Source |
| ADR444 | PRODUCTION | Ultralow Noise, LDO XFET® 4.096V Voltage Reference w/Current Sink and Source |
| ADR445 | PRODUCTION | Ultralow Noise, LDO XFET® 5.0V Voltage Reference w/Current Sink and Source |
| ADR4525 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 2.5V Voltage Reference |
| ADR4533 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 3.3V Voltage Reference |
| ADR4540 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 4.096V Voltage Reference |
| ADR4550 | PRODUCTION | Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference |
| Standard Digital Isolators 2 | ||
| ADUM141E | RECOMMENDED FOR NEW DESIGNS |
Robust, Quad Channel Isolator W/ Output Enable & 1 Reverse Channel |
| ADUM141D | RECOMMENDED FOR NEW DESIGNS |
Robust, Quad Channel Isolator W/ Input Disable & 1 Reverse Channel |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- AD4695
IBIS Model 1
Signal 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 ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Evaluating the AD4696 16-Channel, 16-Bit, 1 MSPS Multiplexed SAR ADC