AD4690BCPZ - 16-Bit, 16-Channel, 1 MSPS SAR ADC | Analog Devices
MPN: AD4690BCPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.18 | $26.18 |
| 10 | $24.5 | $245.00 |
| 100 | $22 | $2,200.00 |
| 500 | $19.5 | $9,750.00 |
| 1,000 | $17.8 | $17,800.00 |
AD4690BCPZ Overview
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input into a digital output. It is known for its high speed, low power consumption, and excellent accuracy, making it ideal for applications such as industrial process control, data acquisition systems, and medical instrumentation. The AD4690BCPZ belongs to the family of precision SAR ADCs, which are essential building blocks in mixed-signal systems where accurate conversion of real-world signals is critical.
Key features of the AD4690BCPZ include 16-bit resolution, 16 single-ended or 8 differential input channels, a maximum sampling rate of 1 MSPS, and an SPI-compatible serial interface. The device also offers a flexible power supply range, low power dissipation, and a built-in reference buffer. The Easy Drive technology reduces the input current and settling time, allowing direct connection to high-impedance sources without external buffers.
The AD4690BCPZ uses a charge redistribution SAR architecture with a capacitive DAC, providing excellent linearity and low noise. The device includes a track-and-hold circuit that captures the analog input at the start of each conversion, ensuring accurate sampling. The high-Z input mode further enhances performance by reducing the input current to near zero, which is particularly beneficial when driving the ADC from high-impedance sensors.
Typical applications for the AD4690BCPZ include industrial automation, motor control, power monitoring, and portable instrumentation. Its high channel count and fast sampling rate make it suitable for multi-channel data acquisition systems, while its low power consumption extends battery life in portable devices. The device is also well-suited for applications requiring high accuracy over a wide temperature range.
When designing with the AD4690BCPZ, it is important to provide a clean, low-impedance reference voltage and adequate decoupling on the power supply pins. The SPI interface should be configured for the desired sampling rate, and the input signal should be properly conditioned to avoid aliasing. The high-Z input mode can be enabled to simplify the front-end design, but the trade-off in settling time should be considered for high-speed applications.
Drop-in alternatives for AD4690BCPZ — 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 AD4690BCPZ (same form factor and footprint) — differing in Package, Supply Voltage, Input Type, Number of Channels, Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD4695BCPZ
✅ Drop-In✓ In Stock
$18.5 / Unit
View Datasheet →AD4691BCPZ
✅ Drop-In✓ In Stock
$8 / Unit
View Datasheet →AD4692BCPZ
✅ Drop-In✓ In Stock
$5.9 / Unit
View Datasheet →AD4696BCPZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.75 / Unit
View Datasheet →AD4690BCPZ-RL7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD4690BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 Bit |
| Number of Channels | 16 Input |
| Sampling Rate | 1 MSPS |
| Input Type | Single-Ended / Differential |
| Interface | SPI |
| Architecture | SAR |
| Package | 32-LFCSP-WQ (5x5 mm) |
| Operating Temperature Range | -40C to +125C |
| Supply Voltage | 1.8 V to 5 V |
| Input Voltage Range | 0 V to VREF |
| Reference Voltage | 2.5 V to 5 V |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD4690BCPZ Pin Configuration
| Pin 1 | AVDD — Analog power supply |
| Pin 2 | VIN0 — Analog input channel 0 |
| Pin 3 | VIN1 — Analog input channel 1 |
| Pin 4 | VIN2 — Analog input channel 2 |
| Pin 5 | VIN3 — Analog input channel 3 |
| Pin 6 | VIN4 — Analog input channel 4 |
| Pin 7 | VIN5 — Analog input channel 5 |
| Pin 8 | VIN6 — Analog input channel 6 |
| Pin 9 | VIN7 — Analog input channel 7 |
| Pin 10 | VIN8 — Analog input channel 8 |
| Pin 11 | VIN9 — Analog input channel 9 |
| Pin 12 | VIN10 — Analog input channel 10 |
| Pin 13 | VIN11 — Analog input channel 11 |
| Pin 14 | VIN12 — Analog input channel 12 |
| Pin 15 | VIN13 — Analog input channel 13 |
| Pin 16 | VIN14 — Analog input channel 14 |
| Pin 17 | VIN15 — Analog input channel 15 |
| Pin 18 | GND — Ground |
| Pin 19 | VREF — Reference voltage input |
| Pin 20 | REFBUF — Reference buffer output |
| Pin 21 | DVDD — Digital power supply |
| Pin 22 | SCLK — Serial clock input |
| Pin 23 | SDI — Serial data input |
| Pin 24 | SDO — Serial data output |
| Pin 25 | CS — Chip select (active low) |
| Pin 26 | CNV — Conversion start input |
| Pin 27 | BUSY — Busy output |
| Pin 28 | GPIO0 — General purpose I/O |
| Pin 29 | GPIO1 — General purpose I/O |
| Pin 30 | GPIO2 — General purpose I/O |
| Pin 31 | GPIO3 — General purpose I/O |
| Pin 32 | EPAD — Exposed pad (thermal and ground) |
Typical Applications
AD4690BCPZ is suitable for 6 applications: Industrial Process Control, Motor Control, Data Acquisition Systems, Medical Instrumentation, Power Monitoring, Portable Instrumentation.
Industrial Process Control
The AD4690BCPZ is ideal for industrial process control systems that require high-accuracy, multi-channel analog-to-digital conversion. With 16 input channels and a 1 MSPS sampling rate, it can monitor multiple sensors simultaneously, such as temperature, pressure, and flow transducers. The Easy Drive technology reduces input current, allowing direct connection to high-impedance sensors without external buffers, simplifying the front-end design. The wide operating temperature range of -40C to +125C ensures reliable operation in harsh industrial environments. The SPI interface enables easy integration with industrial microcontrollers and PLCs, facilitating real-time data acquisition and control.
Recommended
Motor Control
In motor control applications, the AD4690BCPZ provides precise current and voltage sensing for feedback loops. Its 16-bit resolution and 1 MSPS sampling rate enable accurate monitoring of phase currents and DC bus voltages, essential for field-oriented control (FOC) algorithms. The device's high input impedance and Easy Drive technology allow direct connection to shunt resistors and voltage dividers without additional buffering. The compact 32-LFCSP package fits into space-constrained motor drives, while the SPI interface communicates with the motor controller for real-time adjustments. The wide supply voltage range supports both 3.3V and 5V logic levels, simplifying system design.
Recommended
Data Acquisition Systems
The AD4690BCPZ is a versatile choice for general-purpose data acquisition systems (DAQ) requiring multiple analog inputs. With 16 channels and a 1 MSPS aggregate sampling rate, it can capture a wide range of signals, from slow temperature sensors to faster vibration signals. The device's high-Z input mode minimizes loading on the signal source, preserving signal integrity. The SPI interface allows easy connection to FPGAs or microcontrollers, enabling flexible system architectures. The low power consumption makes it suitable for portable DAQ devices, while the wide temperature range supports industrial-grade data loggers. The device's small footprint enables high-density channel counts on a single PCB.
Recommended
Medical Instrumentation
The AD4690BCPZ is well-suited for medical instrumentation such as patient monitoring systems and diagnostic equipment. Its 16-bit resolution provides the accuracy needed for vital sign monitoring, including ECG, EEG, and blood pressure measurements. The device's low power consumption is critical for battery-powered portable medical devices. The high input impedance and Easy Drive technology allow direct connection to bio-potential electrodes without excessive loading, reducing signal distortion. The SPI interface enables seamless integration with medical-grade microcontrollers. The device's small package size is advantageous for compact wearable devices, while the wide temperature range ensures reliable operation in clinical environments.
Recommended
Power Monitoring
The AD4690BCPZ is ideal for power monitoring applications, such as smart grid meters and industrial power analyzers. With 16 channels, it can simultaneously measure voltage and current from multiple phases, enabling accurate power quality analysis. The 1 MSPS sampling rate allows detection of harmonics and transients up to the Nyquist frequency. The device's high accuracy and low noise ensure precise energy metering. The SPI interface facilitates communication with metering ICs or microcontrollers for data processing. The wide supply voltage range and low power consumption make it suitable for both line-powered and battery-backed monitoring systems. The compact package allows integration into existing meter designs.
Recommended
Portable Instrumentation
The AD4690BCPZ is an excellent choice for portable instrumentation, including handheld multimeters, data loggers, and field analyzers. Its low power consumption extends battery life, while the 16-bit resolution provides accurate measurements for a wide range of signals. The device's small 32-LFCSP package is ideal for compact handheld designs. The SPI interface allows easy connection to low-power microcontrollers, enabling efficient data processing. The high-Z input mode reduces loading on the signal source, preserving measurement accuracy. The wide operating temperature range ensures reliable operation in outdoor environments. The device's flexibility in channel configuration supports various measurement functions in a single instrument.
Recommended
Recommended Products Summary
Engineering reference data for AD4690BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4695BCPZ | AD4691BCPZ | AD4692BCPZ |
|---|---|---|---|---|
| Package | 32-LFCSP-WQ (5x5 mm) | 32-LFCSP-WQ (5x5 mm) - same | 32-LFCSP-WQ (5x5 mm) - same | 32-LFCSP-WQ (5x5 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 Bit | 16 Bit | 16 Bit | 16 Bit |
| Number of Channels | 16 | 16 | 16 | 16 |
| Interface | SPI | SPI | SPI | SPI |
| Supply Voltage | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V |
| Operating Temperature Range | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Higher sampling rate (vs AD4695BCPZ)
- 16-channel input flexibility (vs AD4691BCPZ)
- Easy Drive technology (vs AD4692BCPZ)
Design Notes
Ensure that the AVDD and DVDD supplies are properly decoupled with 0.1uF and 10uF capacitors placed close to the pins. The reference voltage (VREF) should be driven by a low-impedance source, and a 1uF capacitor should be placed on the REFBUF pin to stabilize the internal buffer. For optimal performance, use a separate analog ground plane and connect the exposed pad (EPAD) to the ground plane with multiple vias to enhance thermal dissipation.
Route the analog input traces away from digital signals to minimize crosstalk. Use a ground plane under the ADC to reduce noise. For high-impedance sources, enable the high-Z input mode to reduce input current, but be aware that this may increase settling time. Place the ADC close to the signal source to minimize trace length and parasitic capacitance.
Avoid driving the analog inputs beyond the supply rails, as this can cause latch-up or damage. Ensure that the SPI interface timing meets the datasheet specifications, especially the minimum CS setup and hold times. When using the high-Z input mode, verify that the source impedance is within the recommended range to avoid conversion errors. Also, ensure that the reference voltage is stable and noise-free, as it directly affects the ADC's accuracy.
Compliance Information
RoHS compliance is indicated by distributor listings. Other compliance details not specified in the provided data.
