AD7381BCPZ - 14-Bit 4MSPS Dual SAR ADC | Analog Devices
MPN: AD7381BCPZ 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 AD7381BCPZ 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:
AD7380BCPZ
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View Datasheet βAD7384BCPZ
β Drop-Inπ Reference alternative (not in catalog)
AD7383-4BCPZ
β Drop-Inβ In Stock
$30.5 / Unit
View Datasheet βAD4696BCPZ
β Drop-Inβ In Stock
$11.75 / Unit
View Datasheet βAD4695BCPZ
β Drop-Inβ In Stock
$18.5 / Unit
View Datasheet βAD4694BCPZ
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$8.1 / Unit
View Datasheet βAD7381BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 14 Bit |
| Number of Inputs | 2 |
| Sampling Rate | 4 MSPS |
| Input Type | Differential |
| Data Interface | SPI |
| Architecture | SAR |
| Supply Voltage | 3.0 V to 3.6 V |
| Package | 16-LFCSP (3x3 mm) |
| Operating Temperature | -40C to +125C |
| Mounting Type | Surface Mount |
| Reference Type | External, Internal |
| Number of A/D Converters | 2 |
| Ratio - S/H:ADC | 1:1 |
| RoHS Status | Compliant |
| Moisture Sensitivity Level (MSL) | 3 |
AD7381BCPZ Pin Configuration
| Pin 1 | VREF β Reference voltage input |
| Pin 2 | VIN1+ β Positive analog input channel 1 |
| Pin 3 | VIN1- β Negative analog input channel 1 |
| Pin 4 | GND β Ground |
| Pin 5 | VIN2+ β Positive analog input channel 2 |
| Pin 6 | VIN2- β Negative analog input channel 2 |
| Pin 7 | VDD β Power supply |
| Pin 8 | SCLK β Serial clock input |
| Pin 9 | SDI β Serial data input |
| Pin 10 | SDO β Serial data output |
| Pin 11 | CS β Chip select |
| Pin 12 | GND β Ground |
| Pin 13 | VIO β I/O supply voltage |
| Pin 14 | CNV β Conversion start input |
| Pin 15 | GND β Ground |
| Pin 16 | VREF β Reference voltage output |
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
AD7381BCPZ is suitable for 6 applications: Motor Control, Power Monitoring, Data Acquisition Systems, Industrial Automation, Test and Measurement, Automotive.
Motor Control
The AD7381BCPZ is ideal for motor control applications due to its dual simultaneous sampling and 4 MSPS throughput. It enables accurate current and voltage sensing in each phase, improving control loop performance. The device's low power consumption and small package make it suitable for industrial drives. With a 14-bit resolution, it provides sufficient precision for high-performance motor control algorithms. The SPI interface simplifies connection to microcontrollers and DSPs, reducing design complexity. The wide operating temperature range ensures reliable operation in harsh industrial environments.
Recommended
Power Monitoring
The AD7381BCPZ is well-suited for power monitoring applications, where high-speed, simultaneous sampling of voltage and current is essential for accurate power quality analysis. The 4 MSPS sampling rate allows real-time monitoring of harmonics and transients. The dual simultaneous sampling ensures that voltage and current are sampled at the same instant, enabling accurate phase and power calculations. The device's low power consumption is beneficial for energy-efficient monitoring systems. The SPI interface allows easy integration with metering ICs and microcontrollers. The small LFCSP package saves board space in compact power monitors.
Recommended
Data Acquisition Systems
The AD7381BCPZ is a versatile choice for data acquisition systems, offering high speed, dual simultaneous sampling, and a simple SPI interface. It can be used in multi-channel systems with multiple ADCs to capture synchronized data. The 14-bit resolution provides good dynamic range for various sensor signals. The device's low power consumption is ideal for portable and battery-powered data loggers. The small package allows high-density designs. The wide operating temperature range makes it suitable for industrial data acquisition. The device's performance is guaranteed over the full temperature range, ensuring reliable data capture in harsh environments.
Recommended
Industrial Automation
In industrial automation, the AD7381BCPZ provides high-speed, accurate analog-to-digital conversion for process control and monitoring. Its dual simultaneous sampling is useful for measuring multiple parameters, such as pressure and temperature, at the same time. The 4 MSPS throughput enables fast response in closed-loop control systems. The device's robust design and wide temperature range ensure reliable operation in factory environments. The SPI interface simplifies integration with PLCs and industrial controllers. The small package is advantageous for space-limited automation modules. The device's low power consumption reduces heat generation in densely populated control cabinets.
Recommended
Test and Measurement
The AD7381BCPZ is suitable for test and measurement equipment, such as oscilloscopes and data loggers, where high-speed and high-resolution conversion is required. The 4 MSPS sampling rate allows capturing fast transients and waveforms. The dual simultaneous sampling enables accurate time-correlated measurements on multiple channels. The device's low noise and high linearity ensure accurate signal reproduction. The SPI interface allows easy integration with FPGAs and microcontrollers. The small package is beneficial for portable test instruments. The device's wide operating temperature range ensures stable performance in various testing environments.
Recommended
Automotive
The AD7381BCPZ is designed for automotive applications, such as battery management systems and motor drives, where high-speed, accurate sensing is critical. Its dual simultaneous sampling is ideal for measuring battery voltage and current simultaneously. The 4 MSPS throughput enables real-time monitoring of fast-changing signals. The device operates over a wide temperature range of -40C to +125C, suitable for automotive environments. The small LFCSP package is space-efficient for automotive electronics. The SPI interface simplifies connection to automotive microcontrollers. The device's low power consumption is beneficial for reducing load on the vehicle's electrical system.
Recommended
Recommended Products Summary
Engineering reference data for AD7381BCPZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7380BCPZ | AD7384BCPZ | AD4696BCPZ |
|---|---|---|---|---|
| Resolution | 14-bit | 16-bit | 14-bit | 16-bit |
| Sampling Rate | 4 MSPS | 4 MSPS | 4 MSPS | 500 kSPS |
| Number of Channels | 2 | 2 | 4 | 8 |
| Input Type | Differential | Differential | Differential | Differential |
| Interface | SPI | SPI | SPI | SPI |
| Package | 16-LFCSP (3x3 mm) | 16-LFCSP (3x3 mm) | 16-LFCSP (3x3 mm) | 16-LFCSP (3x3 mm) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 1.8 V to 5.5 V |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Key Differentiators
- Dual simultaneous sampling (vs AD4696BCPZ)
- Higher sampling rate (vs AD4696BCPZ)
- Pin-compatible with 16-bit AD7380 (vs AD7380BCPZ)
Design Notes
The AD7381BCPZ operates from a 3.0 V to 3.6 V supply. Use a low-noise LDO to provide a clean supply voltage, and place 0.1 uF and 10 uF decoupling capacitors close to the VDD pin. The VIO pin should be connected to the same supply as the host interface logic to ensure proper voltage levels.
For optimal performance, use a solid ground plane and minimize the length of analog input traces. Keep the analog input traces away from digital signals to reduce coupling. Place the reference decoupling capacitor close to the VREF pin. The exposed pad should be soldered to the ground plane for thermal and electrical performance.
Ensure that the reference voltage is stable and within the specified range. An unstable reference can cause conversion errors. Also, avoid driving the analog inputs beyond the specified common-mode range. Use a proper anti-aliasing filter on the inputs to prevent high-frequency noise from aliasing into the passband.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
