AD7982BCPZ - 18-Bit 1 MSPS PulSAR ADC | Analog Devices
MPN: AD7982BCPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.08 | $23.08 |
| 10 | $21.5 | $215.00 |
| 100 | $18.9 | $1,890.00 |
| 500 | $16.2 | $8,100.00 |
| 1,000 | $14.5 | $14,500.00 |
AD7982BCPZ 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 typically offers high resolution, low power consumption, and fast conversion times, making it suitable for applications requiring precise measurements with moderate sampling rates. SAR ADCs are widely used in data acquisition systems, industrial process control, medical instrumentation, and portable devices.
Key features of the AD7982 include 18-bit resolution with no missing codes, a throughput of 1 MSPS, and low power dissipation. At 1 MSPS, the power consumption is typically 7.5 mW, while at 10 kSPS it drops to 75 µW, making it ideal for battery-powered applications. The device achieves an integral nonlinearity (INL) of ±1 LSB typical and ±2 LSB maximum, and a dynamic range of 99 dB. It also features a versatile serial interface port that is compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
The AD7982 uses a low-power, high-speed 18-bit sampling ADC architecture with a capacitive DAC and a precision comparator. The device includes an internal reference buffer and supports both external and internal reference options. The serial interface provides a daisy-chain mode for multiple ADC configurations, simplifying system design. The LFCSP package offers excellent thermal performance and a compact footprint for space-constrained designs.
Typical applications include high-speed data acquisition, industrial process control, medical imaging, and portable instrumentation. The low power consumption and high resolution make it suitable for battery-powered devices, while the high throughput supports real-time monitoring systems. The device is also used in vibration analysis, motor control, and other precision measurement applications.
When designing with the AD7982, ensure proper decoupling of the VDD and VIO supplies with 100 nF and 10 µF capacitors placed close to the pins. The reference input should be bypassed with a 10 µF capacitor to maintain stability. The serial clock (SCK) frequency should not exceed 50 MHz to ensure reliable data transfer. The device supports power-down modes to reduce power consumption further when not converting.
Drop-in alternatives for AD7982BCPZ — 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 AD7982BCPZ (same form factor and footprint) — differing in Sampling Rate, Resolution, Input Type, Package, Data Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7982BCPZ-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7982BCPZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7980BCPZ-RL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$18 / Unit
View Datasheet →AD7690BCPZRL7
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$17.6 / Unit
View Datasheet →AD7982BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Number of Inputs | 1 |
| Input Type | Single-ended |
| Data Interface | SPI, QSPI, MICROWIRE, DSP |
| Sampling Rate | 1 MSPS |
| Architecture | SAR |
| INL | ±1 LSB typical, ±2 LSB maximum |
| Dynamic Range | 99 dB |
| Power Dissipation | 7.5 mW at 1 MSPS, 75 µW at 10 kSPS |
| Supply Voltage (VDD) | 2.5 V |
| Digital Supply (VIO) | 1.8 V to 5 V |
| Operating Temperature | -40°C to +85°C |
| Package | 10-LFCSP-WD (3x3 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD7982BCPZ Pin Configuration
| Pin 1 | VDD — Power supply, 2.5 V |
| Pin 2 | GND — Ground |
| Pin 3 | IN — Analog input |
| Pin 4 | REF — Reference input |
| Pin 5 | GND — Ground |
| Pin 6 | VIO — Digital interface supply |
| Pin 7 | SCK — Serial clock input |
| Pin 8 | SDI — Serial data input |
| Pin 9 | SDO — Serial data output |
| Pin 10 | CNV — Convert input |
Typical Applications
AD7982BCPZ is suitable for 6 applications: High-Speed Data Acquisition, Industrial Process Control, Medical Instrumentation, Portable Instrumentation, Vibration Analysis, Motor Control.
High-Speed Data Acquisition
The AD7982BCPZ's 1 MSPS sampling rate and 18-bit resolution make it ideal for high-speed data acquisition systems. It can capture fast-changing signals with high precision, enabling accurate analysis in applications such as vibration monitoring, transient recording, and automated test equipment. The low power consumption allows for dense multi-channel designs without excessive heat generation.
Recommended
Industrial Process Control
In industrial process control, the AD7982BCPZ provides precise measurement of analog signals such as temperature, pressure, and flow. Its 18-bit resolution and ±1 LSB INL ensure accurate monitoring, while the wide operating temperature range (-40°C to +85°C) suits harsh factory environments. The SPI interface simplifies integration with industrial microcontrollers and PLCs.
Recommended
Medical Instrumentation
The AD7982BCPZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its high resolution and low noise enable accurate measurement of physiological signals like ECG and EEG. The low power consumption is critical for battery-operated portable devices, and the small LFCSP package saves board space in compact designs.
Recommended
Portable Instrumentation
For portable instruments like handheld multimeters and data loggers, the AD7982BCPZ offers a balance of performance and power efficiency. Its 75 µW power dissipation at 10 kSPS extends battery life, while the 18-bit resolution provides high measurement accuracy. The VIO range of 1.8 V to 5 V allows direct connection to low-voltage digital logic, reducing component count.
Recommended
Vibration Analysis
The AD7982BCPZ's 1 MSPS sampling rate and 18-bit resolution make it suitable for vibration analysis in predictive maintenance and structural health monitoring. It can capture high-frequency vibration signals with high dynamic range (99 dB), enabling detection of subtle anomalies. The low power consumption allows deployment in wireless sensor nodes.
Recommended
Motor Control
In motor control systems, the AD7982BCPZ provides accurate current and voltage sensing for feedback loops. Its high sampling rate enables real-time monitoring of phase currents, while the 18-bit resolution ensures precise control. The SPI interface allows easy connection to motor control DSPs or FPGAs, and the small package fits compact drive electronics.
Recommended
Recommended Products Summary
Engineering reference data for AD7982BCPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7982BCPZ-RL7 | AD7982BCPZ-RL | AD7980BCPZ-RL7 | AD7690BCPZRL7 |
|---|---|---|---|---|---|
| Package | 10-LFCSP-WD (3x3 mm) | 10-LFCSP-WD (3x3 mm) - same | 10-LFCSP-WD (3x3 mm) - same | 10-LFCSP-WD (3x3 mm) - same | 10-LFCSP-WD (3x3 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 bit | 18 bit | 18 bit | 16 bit | 18 bit |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 400 kSPS |
| Power Dissipation at 1 MSPS | 7.5 mW | 7.5 mW | 7.5 mW | 7.5 mW | 4.5 mW |
| INL | ±1 LSB typical | ±1 LSB typical | ±1 LSB typical | ±1 LSB typical | ±1 LSB typical |
| Dynamic Range | 99 dB | 99 dB | 99 dB | 96 dB | 99 dB |
| VIO Range | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V | 1.8 V to 5 V |
Key Differentiators
- Higher resolution than AD7980 (vs AD7980BCPZ-RL7)
- Higher sampling rate than AD7690 (vs AD7690BCPZRL7)
- Lower power than many competing 18-bit ADCs (vs AD7690BCPZRL7)
Design Notes
Decouple the VDD and VIO supplies with 100 nF and 10 µF capacitors placed as close to the pins as possible. The VDD supply should be clean and stable; a low-dropout regulator is recommended if the supply is noisy. The VIO supply can be tied to the digital logic supply to ensure proper interface levels.
Use a solid ground plane under the ADC and keep analog and digital grounds separate, connecting them at a single point. Route the analog input away from digital traces to minimize coupling. The REF pin should be bypassed with a 10 µF capacitor to ground to maintain reference stability.
Ensure the SCK frequency does not exceed 50 MHz to avoid data corruption. The CNV pin initiates conversion on a rising edge; ensure it is not left floating. The analog input voltage must not exceed the reference voltage or the device's absolute maximum ratings. Use a series resistor to limit input current if overvoltage is possible.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.