AD4693BCPZ - 16-Bit 500kSPS 8-Ch SAR ADC | Analog Devices
MPN: AD4693BCPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.9 | $4,450.00 |
| 1,000 | $8.1 | $8,100.00 |
AD4693BCPZ Overview
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input to a digital output. It is known for its high speed, low power, and excellent accuracy, making it ideal for industrial, instrumentation, and medical applications. The AD4693 belongs to the family of Easy Drive multiplexed SAR ADCs, which integrate precharge buffers to reduce input transients, allowing the use of smaller and lower-power analog front-end (AFE) components.
Key features of the AD4693BCPZ include 16-bit resolution, 8 input channels, a maximum throughput of 500 kSPS, and an SPI-compatible serial interface. The Easy Drive technology significantly reduces input current and voltage transients, enabling direct connection to sensors without high-bandwidth driver amplifiers. The device also includes per-channel averaging filters that can improve effective resolution and reduce noise.
The AD4693 uses a charge redistribution SAR architecture with an internal reference buffer, providing high linearity and low noise. The precharge buffers on each input channel eliminate the need for external RC filters in many applications, simplifying the AFE design. The device operates from a single 2.3V to 5.5V supply, making it suitable for battery-powered and low-voltage systems.
Typical applications include industrial process control, data acquisition systems, medical instrumentation, and battery monitoring. The AD4693's low power consumption and small package make it ideal for space-constrained designs. Its Easy Drive feature allows direct connection to high-impedance sources, reducing component count and board space.
When designing with the AD4693BCPZ, ensure proper decoupling of the supply pins and a clean reference voltage. The SPI interface should be isolated from noisy digital lines to maintain SNR. The device supports both single-ended and differential input configurations, providing flexibility in sensor interfacing.
Drop-in alternatives for AD4693BCPZ — 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 AD4693BCPZ (same form factor and footprint) — differing in Package, Supply Voltage, Input Type, Sampling Rate, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD4694BCPZ
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View Datasheet →AD4696BCPZ
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View Datasheet →AD4693BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 Bit |
| Number of Channels | 8 Input |
| Sampling Rate | 500 kSPS |
| Architecture | SAR |
| Input Type | Single-Ended / Differential |
| Interface | SPI |
| Supply Voltage | 2.3 V to 5.5 V |
| Package | 24-LFCSP (4x4 mm) |
| Operating Temperature | -40C to +125C |
| Mounting Type | Surface Mount |
| Number of Bits | 16 |
| Reference Type | External |
| Data Interface | SPI |
| Voltage - Supply, Analog | 2.3 V ~ 5.5 V |
| Voltage - Supply, Digital | 2.3 V ~ 5.5 V |
| Features | Easy Drive, Averaging Filters |
AD4693BCPZ 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 | GND — Ground |
| Pin 10 | VDD — Power supply |
| Pin 11 | VREF — Reference voltage input |
| Pin 12 | SCLK — Serial clock |
| Pin 13 | SDI — Serial data input |
| Pin 14 | SDO — Serial data output |
| Pin 15 | CS — Chip select |
| Pin 16 | CNV — Convert input |
Typical Applications
AD4693BCPZ is suitable for 6 applications: Industrial Process Control, Medical Instrumentation, Data Acquisition Systems, Battery Monitoring, Test and Measurement, IoT and Smart Sensors.
Industrial Process Control
The AD4693BCPZ is ideal for industrial process control systems that require accurate, high-speed monitoring of multiple analog signals. Its 8 channels can simultaneously sample temperature, pressure, and flow sensors, while the Easy Drive technology reduces the need for external signal conditioning. The 16-bit resolution ensures precise measurement of process variables, and the SPI interface simplifies integration with microcontrollers. The wide supply voltage range (2.3V to 5.5V) allows operation in both 3.3V and 5V systems, and the industrial temperature range (-40C to +125C) ensures reliability in harsh environments.
Recommended
Medical Instrumentation
In medical instrumentation, the AD4693BCPZ provides high-resolution, low-noise conversion for patient monitoring devices such as ECG and EEG systems. Its 8 channels can acquire multiple bio-signals simultaneously, and the Easy Drive feature allows direct connection to high-impedance electrodes without additional buffering. The low power consumption is critical for battery-operated portable devices. The 16-bit resolution ensures accurate detection of small physiological signals, and the SPI interface enables easy data transfer to digital signal processors. The compact LFCSP package saves board space in space-constrained medical devices.
Recommended
Data Acquisition Systems
The AD4693BCPZ is a versatile choice for general-purpose data acquisition systems, offering 8 channels of 16-bit conversion at up to 500 kSPS. Its Easy Drive technology simplifies the analog front-end by reducing input transients, allowing direct connection to sensors and transducers. The per-channel averaging filters can improve effective resolution in noisy environments. The SPI interface supports daisy-chaining multiple ADCs for channel expansion. The wide supply voltage range and industrial temperature range make it suitable for both laboratory and field applications. The small package enables high-density designs.
Recommended
Battery Monitoring
The AD4693BCPZ is well-suited for battery monitoring systems, where accurate voltage and current sensing is essential. Its 8 channels can monitor individual cells in a battery pack, and the Easy Drive technology allows direct connection to high-impedance voltage dividers without loading the battery. The low power consumption extends battery life in portable devices. The 16-bit resolution provides precise measurement of cell voltages, enabling accurate state-of-charge estimation. The SPI interface allows easy integration with battery management controllers. The wide supply voltage range accommodates varying battery voltages.
Recommended
Test and Measurement
In test and measurement equipment, the AD4693BCPZ provides high-speed, high-resolution data conversion for capturing waveforms and analyzing signals. Its 500 kSPS sampling rate is sufficient for many audio and vibration analysis applications. The 8 channels allow simultaneous acquisition of multiple test points. The Easy Drive technology reduces the need for external buffer amplifiers, simplifying the front-end design. The SPI interface enables fast data transfer to FPGAs or DSPs. The compact package is ideal for portable test instruments. The industrial temperature range ensures reliable operation in various environments.
Recommended
IoT and Smart Sensors
The AD4693BCPZ is an excellent choice for IoT and smart sensor nodes that require low-power, high-resolution analog-to-digital conversion. Its 8 channels can interface with multiple sensors, such as temperature, humidity, and gas sensors, while the Easy Drive technology allows direct connection to high-impedance sensors without additional amplification. The low power consumption is crucial for battery-powered IoT devices. The SPI interface enables seamless integration with low-power microcontrollers. The small LFCSP package is ideal for compact sensor modules. The wide supply voltage range supports various battery chemistries.
Recommended
Recommended Products Summary
Engineering reference data for AD4693BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4694BCPZ | AD4691BCPZ | AD4692BCPZ |
|---|---|---|---|---|
| Package | 24-LFCSP (4x4 mm) | 24-LFCSP (4x4 mm) | 24-LFCSP (4x4 mm) | 24-LFCSP (4x4 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 Bit | 16 Bit | 16 Bit | 16 Bit |
| Number of Channels | 8 | 8 | 4 | 8 |
| Max Sampling Rate | 500 kSPS | 1 MSPS | 500 kSPS | 1 MSPS |
| Supply Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V |
| Interface | SPI | SPI | SPI | SPI |
| Easy Drive | Yes | Yes | Yes | Yes |
Key Differentiators
- Easy Drive technology reduces input transients (vs AD4694BCPZ)
- Lower power consumption (vs AD4694BCPZ)
- 8-channel input flexibility (vs AD4691BCPZ)
Design Notes
Ensure a clean and stable power supply for the AD4693BCPZ. Use a low-dropout regulator (LDO) to provide the VDD supply, and place 0.1uF and 10uF decoupling capacitors close to the VDD pin. The reference voltage (VREF) should be decoupled with a 1uF capacitor to ground to minimize noise.
For optimal performance, keep the analog input traces short and shielded from digital signals. Use a ground plane under the ADC and avoid routing digital lines near the analog inputs. The LFCSP package has an exposed pad that should be soldered to the PCB ground for thermal and electrical performance.
Do not exceed the absolute maximum ratings for the supply voltage and input pins. The Easy Drive feature reduces input transients, but still ensure the input voltage stays within the specified range. Also, ensure the SPI bus is properly terminated to avoid signal integrity issues at high clock rates.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.