AD7986BCPZ - 18-Bit 2 MSPS SAR ADC | Analog Devices
MPN: AD7986BCPZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.42 | $26.42 |
| 10 | $24.5 | $245.00 |
| 100 | $22 | $2,200.00 |
| 500 | $20 | $10,000.00 |
| 1,000 | $18.5 | $18,500.00 |
Drop-in alternatives for AD7986BCPZ 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:
AD7986BCPZ-RL7
β Drop-Inπ Reference alternative (not in catalog)
AD7980BCPZ-RL7
β Drop-Inβ In Stock
$18 / Unit
View Datasheet βAD7986BCPZ Maximum Ratings & Electrical Characteristics
| Resolution | 18 Bit |
| Sampling Rate | 2 MSPS |
| Number of Inputs | 1 |
| Input Type | Differential |
| Architecture | SAR |
| Supply Voltage | 2.5 V |
| Digital Supply Voltage (VIO) | 1.8 V to 2.7 V |
| Power Dissipation | 15 mW |
| SNR (Typical) | 98 dB |
| Interface | SPI, Daisy-Chain |
| Package | 20-Lead LFCSP (4x4 mm) |
| Operating Temperature Range | -40Β°C to +85Β°C |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Mounting Type | Surface Mount |
AD7986BCPZ Pin Configuration
| Pin 1 | AVDD β Analog power supply (2.5 V) |
| Pin 2 | IN+ β Positive differential input |
| Pin 3 | IN- β Negative differential input |
| Pin 4 | GND β Ground |
| Pin 5 | REF β Reference voltage input |
| Pin 6 | REFGND β Reference ground |
| Pin 7 | DVDD β Digital power supply (2.5 V) |
| Pin 8 | VIO β Digital interface supply (1.8 V to 2.7 V) |
| Pin 9 | SDI β Serial data input (for daisy-chain) |
| Pin 10 | SCK β Serial clock input |
| Pin 11 | SDO β Serial data output |
| Pin 12 | CNV β Conversion start input |
| Pin 13 | BUSY β Busy indicator output |
| Pin 14 | GND β Ground |
| Pin 15 | GND β Ground |
| Pin 16 | GND β Ground |
| Pin 17 | GND β Ground |
| Pin 18 | GND β Ground |
| Pin 19 | GND β Ground |
| Pin 20 | 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
AD7986BCPZ is suitable for 6 applications: Medical Imaging, Industrial Automation, Test and Measurement, Scientific Instrumentation, Audio and Acoustic Analysis, Aerospace and Defense.
Medical Imaging
The AD7986BCPZ's 18-bit resolution and 2 MSPS sampling rate enable high-fidelity signal capture in ultrasound and MRI systems. Its low power consumption (15 mW) is critical for portable devices, and the high SNR (98 dB) ensures accurate image reconstruction. The differential input rejects common-mode noise, improving signal integrity in noisy clinical environments.
Recommended
Industrial Automation
In industrial process control and automation, the AD7986BCPZ provides precise analog-to-digital conversion for sensors and transducers. Its 2 MSPS throughput supports real-time monitoring, while the SPI interface simplifies integration with microcontrollers. The wide operating temperature range (-40Β°C to +85Β°C) ensures reliability in harsh factory environments, and the low power dissipation reduces heat buildup in enclosed systems.
Recommended
Test and Measurement
The AD7986BCPZ is ideal for high-speed data acquisition in oscilloscopes, spectrum analyzers, and other test equipment. Its 18-bit resolution and 2 MSPS sampling rate allow accurate capture of fast transient signals. The low noise and high linearity ensure measurement accuracy, while the small LFCSP package saves board space in compact instruments. The daisy-chain interface enables multi-channel synchronization.
Recommended
Scientific Instrumentation
For scientific instruments such as spectrometers and particle detectors, the AD7986BCPZ offers the high resolution and speed needed to capture subtle signal variations. Its low power consumption is advantageous for battery-operated field instruments. The differential input reduces interference, and the wide temperature range supports outdoor and laboratory use. The SPI interface allows easy connection to DSPs and FPGAs.
Recommended
Audio and Acoustic Analysis
The AD7986BCPZ's high SNR (98 dB) and 18-bit resolution make it suitable for professional audio and acoustic measurement applications. It can digitize high-frequency signals with low distortion, enabling accurate analysis of sound waves and vibrations. The low power consumption is beneficial for portable audio analyzers, and the small package allows integration into compact devices.
Recommended
Aerospace and Defense
In aerospace and defense systems, the AD7986BCPZ provides reliable high-speed conversion for radar, communication, and guidance systems. Its wide temperature range and low power consumption are critical for airborne and satellite applications. The high SNR ensures signal integrity in noisy electromagnetic environments, and the compact LFCSP package withstands vibration and thermal cycling.
Recommended
Recommended Products Summary
Engineering reference data for AD7986BCPZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7986BCPZ-RL7 | AD7980BCPZ | AD7980BRMZ |
|---|---|---|---|---|
| Package | 20-Lead LFCSP (4x4 mm) | 20-Lead LFCSP (4x4 mm) - same | 20-Lead LFCSP (4x4 mm) - same | 10-Lead MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 Bit | 18 Bit | 16 Bit | 16 Bit |
| Sampling Rate | 2 MSPS | 2 MSPS | 1 MSPS | 1 MSPS |
| Power Dissipation | 15 mW | 15 mW | 7 mW | 7 mW |
| SNR (Typical) | 98 dB | 98 dB | 91 dB | 91 dB |
| Interface | SPI, Daisy-Chain | SPI, Daisy-Chain | SPI, Daisy-Chain | SPI, Daisy-Chain |
| Operating Temperature Range | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -40Β°C to +85Β°C | -40Β°C to +85Β°C |
Key Differentiators
- Higher resolution and speed (vs AD7980BCPZ)
- Higher SNR (vs AD7980BCPZ)
- Pin-compatible with AD7980BCPZ (vs AD7980BCPZ)
Design Notes
Use separate analog and digital power supplies (AVDD and DVDD) with proper decoupling. Place 0.1 Β΅F and 10 Β΅F capacitors close to each supply pin. The VIO supply should be decoupled with a 0.1 Β΅F capacitor. Ensure the reference voltage (REF) is low-noise and stable, as it directly affects conversion accuracy.
Maintain a solid ground plane under the ADC and avoid routing digital traces near analog inputs. Keep the analog input traces short and shielded to minimize noise pickup. Use a star-ground topology to separate analog and digital grounds, connecting them at a single point. Follow the layout guidelines in the AD7986 datasheet for optimal performance.
Do not exceed the absolute maximum ratings for supply voltages. Ensure the VIO voltage matches the host interface logic level to avoid damage. The CNV pin must be held low during conversion to prevent false triggers. Use a low-jitter clock for SCK to maintain timing accuracy. Verify the reference voltage is within the specified range to avoid clipping.
Compliance Information
RoHS compliant and lead-free per Analog Devices product page. AEC-Q100 not applicable for this industrial ADC.
