AD7946BCPZ - 14-Bit 500kSPS PulSAR ADC | Analog Devices
MPN: AD7946BCPZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.26 | $13.26 |
| 10 | $12.5 | $125.00 |
| 100 | $11.2 | $1,120.00 |
| 500 | $10.1 | $5,050.00 |
| 1,000 | $9.5 | $9,500.00 |
Drop-in alternatives for AD7946BCPZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7946BCP
β Drop-Inπ Reference alternative (not in catalog)
AD7946BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 14-bit |
| Sample Rate (Warp mode) | 500 kSPS |
| Sample Rate (Normal mode) | 450 kSPS |
| Sample Rate (Impulse mode) | 380 kSPS |
| INL | 0.4 LSB typ, 1 LSB max |
| DNL | 0.25 LSB typ, 0.7 LSB max |
| Input Voltage Range | -0.5 V to 5.8 V |
| Supply Voltage | 5 V |
| Operating Temperature | -40Β°C to +85Β°C |
| Package | 10-lead LFCSP (3 mm x 3 mm) |
| Mounting Type | Surface Mount |
| Number of Pins | 10 |
| Architecture | SAR (charge redistribution) |
| Input Type | Pseudo-differential |
| Interface | SPI-compatible |
AD7946BCPZ Pin Configuration
| Pin 1 | VDD β Power supply, 5V |
| Pin 2 | GND β Ground |
| Pin 3 | IN+ β Positive analog input |
| Pin 4 | IN- β Negative analog input |
| Pin 5 | REF β Reference input |
| Pin 6 | SCK β Serial clock input |
| Pin 7 | SDI β Serial data input |
| Pin 8 | SDO β Serial data output |
| Pin 9 | CNV β Convert input |
| Pin 10 | GND β 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
AD7946BCPZ is suitable for 6 applications: High-Speed Data Acquisition, Industrial Process Control, Medical Instrumentation, Portable Battery-Powered Devices, Test and Measurement Equipment, Communication Systems.
High-Speed Data Acquisition
The AD7946BCPZ's 500 kSPS sample rate and 14-bit resolution make it ideal for high-speed data acquisition systems. Its low power consumption and small package enable compact designs. The SPI interface simplifies connection to microcontrollers, and the pseudo-differential input reduces common-mode noise, ensuring accurate signal capture in industrial and test equipment.
Recommended
Industrial Process Control
In industrial process control, the AD7946BCPZ provides accurate, high-speed conversion of sensor signals. Its 14-bit resolution and low INL ensure precise monitoring of temperature, pressure, and flow. The device operates over -40Β°C to +85Β°C, suitable for harsh environments. The SPI interface allows easy integration with PLCs and industrial microcontrollers, and the small LFCSP package saves board space.
Recommended
Medical Instrumentation
The AD7946BCPZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its low power consumption extends battery life in portable devices, while the 14-bit resolution provides accurate readings. The small package enables miniaturization of medical devices. The device's low noise performance allows the use of simpler front-end amplifiers, reducing system cost and complexity.
Recommended
Portable Battery-Powered Devices
For portable devices, the AD7946BCPZ offers multiple power-down modes (Warp, Normal, Impulse) to optimize power consumption. Its low power dissipation extends battery life, and the 3x3 mm LFCSP package is ideal for compact designs. The SPI interface is compatible with low-power microcontrollers, and the device operates from a single 5 V supply, simplifying power management.
Recommended
Test and Measurement Equipment
The AD7946BCPZ is used in test and measurement equipment such as digital multimeters and data loggers. Its high sample rate and 14-bit resolution enable accurate waveform capture. The device's low INL and DNL ensure linearity, and the SPI interface allows fast data transfer to processors. The small package and industrial temperature range make it suitable for benchtop and portable instruments.
Recommended
Communication Systems
In communication systems, the AD7946BCPZ can be used for baseband signal digitization in software-defined radios and receivers. Its 500 kSPS sample rate is sufficient for narrowband signals, and the 14-bit resolution provides good dynamic range. The device's low power consumption is beneficial for portable communication devices. The SPI interface enables easy integration with DSPs and FPGAs.
Recommended
Recommended Products Summary
Engineering reference data for AD7946BCPZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7946BRMZ | AD7946BCP | ADS7946 |
|---|---|---|---|---|
| Package | 10-lead LFCSP (3x3 mm) | 10-lead MSOP | 10-lead LFCSP (3x3 mm) | 10-lead MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 14-bit | 14-bit | 14-bit | 14-bit |
| Sample Rate | 500 kSPS | 500 kSPS | 500 kSPS | 2 MSPS |
| Input Voltage Range | -0.5 V to 5.8 V | -0.5 V to 5.8 V | -0.5 V to 5.8 V | 0 V to 5 V |
| Supply Voltage | 5 V | 5 V | 5 V | 2.7 V to 5.5 V |
| INL | 0.4 LSB typ | 0.4 LSB typ | 0.4 LSB typ | 1 LSB max |
| Interface | SPI | SPI | SPI | SPI |
Key Differentiators
- Higher sample rate than AD7942 (vs AD7942BRMZ)
- Smaller package than AD7946BRMZ (vs AD7946BRMZ)
- Lower power consumption than ADS7946 (vs ADS7946)
Design Notes
Decouple the VDD pin with a 10 Β΅F and 0.1 Β΅F capacitor placed as close as possible to the pin. The AD7946 operates from a single 5 V supply; ensure the supply is clean and stable to maintain ADC accuracy. Refer to the datasheet's power supply recommendations.
For optimal performance, use a solid ground plane and minimize trace lengths on the analog input. The pseudo-differential input should be routed with care to avoid noise pickup. Place the ADC close to the signal source to reduce parasitic capacitance.
Avoid driving the analog input beyond the specified -0.5 V to 5.8 V range, as this can damage the device. Use an external buffer amplifier if the source impedance is high. Also, ensure the reference input is properly decoupled to avoid reference noise affecting conversion accuracy.
Compliance Information
RoHS compliant per ADI product page. Not AEC-Q100 qualified.
