AD4694BCPZ - 16-Bit 8-Ch SAR ADC | Analog Devices
MPN: AD4694BCPZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for AD4694BCPZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesAD4694BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 Bit |
| Number of Channels | 8 Input |
| Sampling Rate | 1 MSPS |
| Architecture | SAR |
| Input Type | Single-Ended |
| 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 Converters | 1 |
| Reference Type | External |
| Power Dissipation | [DATA_NEEDED: Power Dissipation] |
| Signal-to-Noise Ratio | [DATA_NEEDED: SNR] |
| Integral Nonlinearity | [DATA_NEEDED: INL] |
| RoHS Status | Compliant |
AD4694BCPZ Pin Configuration
| Pin 1 | AVDD β Analog supply voltage |
| Pin 2 | VIN0 β Analog input channel 0 |
| Pin 3 | VIN1 β Analog input channel 1 |
| Pin 4 | VIN2 β Analog input channel 2 |
| Pin 5 | VIN3 β Analog input channel 3 |
| Pin 6 | VIN4 β Analog input channel 4 |
| Pin 7 | VIN5 β Analog input channel 5 |
| Pin 8 | VIN6 β Analog input channel 6 |
| Pin 9 | VIN7 β Analog input channel 7 |
| Pin 10 | GND β Ground |
| Pin 11 | REF β Reference voltage input |
| Pin 12 | DVDD β Digital supply voltage |
| Pin 13 | SCLK β Serial clock input |
| Pin 14 | SDI β Serial data input |
| Pin 15 | SDO β Serial data output |
| Pin 16 | CS β Chip select (active low) |
| Pin 17 | CNV β Convert input |
| Pin 18 | BUSY β Busy output |
| Pin 19 | GPIO0 β General purpose I/O |
| Pin 20 | GPIO1 β General purpose I/O |
| Pin 21 | GPIO2 β General purpose I/O |
| Pin 22 | GPIO3 β General purpose I/O |
| Pin 23 | VIO β Digital interface supply |
| Pin 24 | EPAD β Exposed pad (ground) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD4694BCPZ is suitable for 6 applications: Industrial Process Control, Battery Management Systems, Medical Instrumentation, Data Acquisition Systems, Test and Measurement Equipment, IoT and Smart Sensors.
Industrial Process Control
The AD4694BCPZ is ideal for industrial process control due to its 16-bit resolution and 8 multiplexed channels, enabling precise monitoring of multiple sensors such as temperature, pressure, and flow. The Easy Drive input stage allows direct connection to high-impedance sensors without external buffers, simplifying the analog front-end. The per-channel averaging filters reduce noise and improve measurement stability, making it suitable for harsh industrial environments. The SPI interface facilitates easy integration with microcontrollers and PLCs, and the wide supply voltage range (2.3V to 5.5V) accommodates various industrial power rails.
Recommended
Battery Management Systems
In battery management systems, the AD4694BCPZ monitors cell voltages and temperatures with 16-bit accuracy. Its 8 input channels can measure multiple cells in a stack, while the Easy Drive input stage minimizes current draw from the battery, preserving energy. The device operates from a low supply voltage, making it compatible with battery-powered systems. The SPI interface allows daisy-chaining multiple ADCs for larger battery packs. The per-channel averaging filters help reject noise from switching regulators, ensuring accurate voltage readings for state-of-charge estimation.
Recommended
Medical Instrumentation
The AD4694BCPZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its 16-bit resolution provides high precision for vital sign measurements, and the 8 channels can acquire multiple physiological signals simultaneously. The Easy Drive input stage reduces the need for external signal conditioning, lowering system complexity and cost. The small 24-LFCSP package is ideal for portable devices. The device's low power consumption extends battery life in wearable monitors, and the SPI interface enables seamless data transfer to processing units.
Recommended
Data Acquisition Systems
The AD4694BCPZ is a core component in data acquisition systems, offering 16-bit resolution and 1 MSPS sampling rate. Its 8 multiplexed channels allow sampling of multiple analog signals, and the Easy Drive input stage simplifies the front-end design by allowing direct connection to sensors. The per-channel averaging filters reduce noise and improve effective resolution. The SPI interface supports high-speed data transfer to FPGAs or DSPs. The device's wide supply voltage range and industrial temperature range make it suitable for both laboratory and field data loggers.
Recommended
Test and Measurement Equipment
The AD4694BCPZ is used in test and measurement equipment such as digital multimeters and data loggers. Its 16-bit resolution and 1 MSPS sampling rate enable accurate and fast measurements. The 8 input channels allow simultaneous monitoring of multiple test points. The Easy Drive input stage reduces input loading, preserving signal integrity. The device's SPI interface simplifies integration with microcontrollers, and its small package is suitable for compact instruments. The per-channel averaging filters help achieve stable readings in noisy environments.
Recommended
IoT and Smart Sensors
The AD4694BCPZ is ideal for IoT and smart sensor nodes that require low power and high resolution. Its 16-bit ADC converts sensor signals with high accuracy, and the 8 channels can interface with multiple sensors. The Easy Drive input stage allows direct connection to resistive sensors like thermistors and strain gauges, reducing component count. The device operates from a low supply voltage, making it suitable for battery-powered IoT devices. The SPI interface enables easy integration with low-power microcontrollers, and the small package fits space-constrained designs.
Recommended
Recommended Products Summary
Engineering reference data for AD4694BCPZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD4694BCPZ-RL7 | AD4693BCPZ | AD7606BSTZ |
|---|---|---|---|---|
| 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 |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 200 kSPS |
| Interface | SPI | SPI | SPI | Parallel/SPI |
| Input Type | Single-Ended | Single-Ended | Single-Ended | Single-Ended |
| Supply Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 4.75V to 5.25V |
Key Differentiators
- Easy Drive input stage (vs AD7606BSTZ)
- Per-channel averaging filters (vs AD7606BSTZ)
- Higher sampling rate (vs AD7606BSTZ)
Design Notes
Decouple the AVDD and DVDD pins with 10uF and 0.1uF capacitors placed close to the pins. The reference input (REF) should have a low-impedance decoupling capacitor (e.g., 10uF) to ensure stable operation. Use separate analog and digital ground planes to minimize noise coupling.
For optimal performance, place the AD4694BCPZ on a PCB with a solid ground plane. Keep analog input traces short and shielded from digital signals. The exposed pad (EPAD) should be soldered to the ground plane for thermal and electrical performance. Follow the layout guidelines in the datasheet.
Ensure the input voltage does not exceed the reference voltage or the supply rails. The Easy Drive input stage allows high source impedance, but the acquisition time must be sufficient at 1 MSPS. Avoid floating unused input channels; tie them to ground or a known voltage.
Compliance Information
RoHS compliant per distributor data. Other compliance details not specified in provided data.
