AD4695BCPZ - 16-Bit 16-Ch 500kSPS SAR ADC | Analog Devices
MPN: AD4695BCPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.18 | $26.18 |
| 10 | $24.5 | $245.00 |
| 100 | $22 | $2,200.00 |
| 500 | $20 | $10,000.00 |
| 1,000 | $18.5 | $18,500.00 |
AD4695BCPZ Overview
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values for processing by digital systems. The AD4695BCPZ belongs to the SAR ADC family, which uses a successive approximation register algorithm to achieve high-speed, high-resolution conversion with low power consumption. SAR ADCs are widely used in data acquisition systems, industrial automation, and medical instrumentation where accuracy and speed are critical.
Key features of the AD4695BCPZ include 16-bit resolution, 16 multiplexed input channels, and a maximum sampling rate of 500 kSPS. The Easy Drive architecture allows direct connection to high-impedance sensors without external buffers, reducing component count and board space. The device also offers a high-Z mode for both analog inputs and reference inputs, further simplifying system design. The LFCSP package provides excellent thermal performance and a compact footprint for space-constrained applications.
Technically, the AD4695BCPZ integrates a capacitive DAC and comparator, achieving excellent linearity and low noise. The serial interface supports multiple devices on a single bus, enabling scalable multi-channel acquisition systems. The device includes an internal reference buffer (in the WLCSP option) and supports external references for flexibility. The ADC operates over a wide temperature range, making it suitable for industrial environments.
Typical applications include industrial process control, battery-powered instrumentation, medical monitoring, and data acquisition systems. The high input impedance and Easy Drive features make it ideal for directly interfacing with sensors such as thermocouples, strain gauges, and pressure transducers. The 16-channel multiplexer allows monitoring multiple signals with a single ADC, reducing system cost.
When designing with the AD4695BCPZ, ensure proper decoupling of the supply and reference pins with low-ESR capacitors. The serial interface should be isolated from noisy digital lines to maintain conversion accuracy. The device's high-Z mode reduces input current, but the source impedance should still be considered to avoid settling time errors.
Drop-in alternatives for AD4695BCPZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD4695BCPZ (same form factor and footprint) — differing in Input Type, Sampling Rate, Reference Type, Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD4695BCPZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD4696BCPZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.75 / Unit
View Datasheet →ADS8568
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX11131
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCP3461
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD4695BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 Bit |
| Number of Channels | 16 Input |
| Sampling Rate | 500 kSPS |
| Architecture | SAR |
| Input Type | Single-Ended |
| Interface | Serial |
| Package | 32-LFCSP-WQ (5x5) |
| Mounting Type | Surface Mount |
| Reference Type | External |
| Number of A/D Converters | 1 |
| Input Impedance | High-Z mode |
| RoHS Status | Compliant |
AD4695BCPZ Pin Configuration
| Pin 1 | VIN0 — Analog input channel 0 |
| Pin 2 | VIN1 — Analog input channel 1 |
| Pin 3 | VIN2 — Analog input channel 2 |
| Pin 4 | VIN3 — Analog input channel 3 |
| Pin 5 | VIN4 — Analog input channel 4 |
| Pin 6 | VIN5 — Analog input channel 5 |
| Pin 7 | VIN6 — Analog input channel 6 |
| Pin 8 | VIN7 — Analog input channel 7 |
| Pin 9 | VIN8 — Analog input channel 8 |
| Pin 10 | VIN9 — Analog input channel 9 |
| Pin 11 | VIN10 — Analog input channel 10 |
| Pin 12 | VIN11 — Analog input channel 11 |
| Pin 13 | VIN12 — Analog input channel 12 |
| Pin 14 | VIN13 — Analog input channel 13 |
| Pin 15 | VIN14 — Analog input channel 14 |
| Pin 16 | VIN15 — Analog input channel 15 |
| Pin 17 | GND — Ground |
| Pin 18 | VREF — Reference voltage input |
| Pin 19 | AVDD — Analog supply |
| Pin 20 | DVDD — Digital supply |
| Pin 21 | SCLK — Serial clock |
| Pin 22 | SDI — Serial data input |
| Pin 23 | SDO — Serial data output |
| Pin 24 | CS — Chip select |
| Pin 25 | CNV — Convert input |
| Pin 26 | BUSY — Busy indicator |
| Pin 27 | GPIO0 — General purpose I/O |
| Pin 28 | GPIO1 — General purpose I/O |
| Pin 29 | GPIO2 — General purpose I/O |
| Pin 30 | GPIO3 — General purpose I/O |
| Pin 31 | PD — Power down |
| Pin 32 | EP — Exposed pad |
Typical Applications
AD4695BCPZ is suitable for 6 applications: Industrial Process Control, Battery-Powered Instrumentation, Medical Monitoring, Data Acquisition Systems, Test and Measurement, IoT and Smart Sensors.
Industrial Process Control
The AD4695BCPZ's 16-channel multiplexer and 500 kSPS sampling rate enable monitoring multiple sensors in industrial automation. Its high-Z input mode allows direct connection to high-impedance sensors like thermocouples and strain gauges without external buffers, simplifying design and reducing cost. The Easy Drive technology ensures accurate conversion even with high source impedances, making it ideal for distributed control systems.
Recommended
Battery-Powered Instrumentation
With a 1.8V supply and low power consumption, the AD4695BCPZ is suitable for portable and battery-powered instruments. Its 16-bit resolution provides high accuracy for measuring battery voltage, current, and temperature. The serial interface minimizes pin count, and the small LFCSP package saves board space, extending battery life in handheld devices.
Recommended
Medical Monitoring
The AD4695BCPZ's high resolution and multiple channels make it ideal for medical devices such as patient monitors and diagnostic equipment. It can digitize signals from ECG, EEG, and blood pressure sensors with high accuracy. The Easy Drive inputs reduce the need for external signal conditioning, simplifying the analog front-end and improving reliability in critical care applications.
Recommended
Data Acquisition Systems
The AD4695BCPZ is a versatile ADC for general-purpose data acquisition systems, offering 16 channels and 500 kSPS throughput. Its serial interface supports daisy-chaining multiple devices for expanded channel counts. The high-Z mode allows direct connection to sensors and transducers, reducing component count and simplifying PCB layout, making it a cost-effective solution for multi-channel DAQ.
Recommended
Test and Measurement
In test and measurement equipment, the AD4695BCPZ provides accurate, high-speed conversion for capturing transient signals. Its 16-bit resolution and 500 kSPS sampling rate are suitable for oscilloscopes, spectrum analyzers, and data loggers. The small package and serial interface enable compact designs, while the Easy Drive inputs simplify probing of high-impedance circuits.
Recommended
IoT and Smart Sensors
The AD4695BCPZ is well-suited for IoT and smart sensor nodes that require multi-channel analog sensing with low power. Its 16-bit resolution provides high precision for environmental monitoring, predictive maintenance, and smart agriculture. The serial interface and small package make it easy to integrate with microcontrollers and wireless modules, enabling compact, energy-efficient designs.
Recommended
Recommended Products Summary
Engineering reference data for AD4695BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4695BCPZ-RL7 | AD4696BCPZ | ADS8568 | MAX11131 | MCP3461 |
|---|---|---|---|---|---|---|
| Package | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) | 32-LFCSP-WQ (5x5) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Maxim Integrated | Microchip Technology |
| Resolution | 16 Bit | 16 Bit | 16 Bit | 16 Bit | 16 Bit | 16 Bit |
| Number of Channels | 16 | 16 | 16 | 8 | 16 | 4 |
| Sampling Rate | 500 kSPS | 500 kSPS | 1 MSPS | 500 kSPS | 500 kSPS | 153.6 kSPS |
| Input Type | Single-Ended | Single-Ended | Single-Ended | Single-Ended | Single-Ended | Single-Ended |
| Interface | Serial | Serial | Serial | Parallel | Serial | SPI |
| Easy Drive | Yes | Yes | Yes | No | No | No |
Key Differentiators
- Easy Drive technology enables high-impedance inputs without external buffers (vs ADS8568)
- 16-channel multiplexer in a compact 32-LFCSP package (vs MCP3461)
- Higher sampling rate than MCP3461 (vs MCP3461)
Design Notes
The AD4695BCPZ operates from a 1.8V supply. Use low-ESR ceramic capacitors (e.g., 0.1uF and 10uF) placed close to the AVDD and DVDD pins to decouple high-frequency noise. A clean, low-noise supply is critical for achieving the specified 16-bit performance.
For optimal performance, route analog inputs away from digital traces and use a solid ground plane. The exposed pad (EP) should be soldered to the PCB ground with multiple vias to enhance thermal dissipation and reduce ground bounce. Keep the reference input (VREF) well-filtered with a 10uF capacitor.
Avoid driving the analog inputs with high source impedance without considering settling time. Even with Easy Drive high-Z mode, excessive source impedance can cause conversion errors. Use a buffer amplifier if the source impedance exceeds the recommended value. Also, ensure the serial interface timing meets the datasheet specifications to avoid data corruption.
Compliance Information
RoHS compliant per distributor listings. Other compliance data not specified in provided sources.
