AD7980ARMZ - 16-Bit 1 MSPS PulSAR ADC | Analog Devices
MPN: AD7980ARMZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.0909 | $16.09 |
| 10 | $11.6212 | $116.21 |
| 100 | $10.2803 | $1,028.03 |
| 500 | $9.8333 | $4,916.65 |
| 1,000 | $9.3864 | $9,386.40 |
AD7980ARMZ Overview
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital numbers, enabling digital systems to process real-world signals. SAR ADCs use a successive approximation register to perform binary search across the reference voltage, achieving high speed and moderate resolution with low power. The AD7980 belongs to the PulSAR family, known for excellent AC and DC performance, and is widely used in precision data acquisition systems.
Key features include a 16-bit resolution with no missing codes, a maximum sampling rate of 1 MSPS, and a typical signal-to-noise ratio (SNR) of 91.5 dB. The device supports an external reference voltage from 2.4 V to 5.1 V, allowing flexibility in system design. Its SPI-compatible interface supports daisy-chaining multiple ADCs on a single 3-wire bus and provides an optional busy indicator, simplifying multi-channel systems.
The AD7980 uses a charge redistribution SAR architecture with a precision comparator and internal clock, achieving high accuracy without external components. The device operates over a temperature range of -40°C to +125°C and is available in both MSOP and LFCSP packages. Its power dissipation is only 7 mW at 1 MSPS, scaling linearly with throughput, making it ideal for battery-powered and portable applications.
Typical applications include medical instrumentation, high-speed data acquisition, industrial process control, and battery-powered systems. The device's low power and small footprint make it suitable for space-constrained designs. When designing with the AD7980, ensure a clean, low-impedance reference source and adequate decoupling on the VDD and REF pins to achieve optimal performance.
Drop-in alternatives for AD7980ARMZ — 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 AD7980ARMZ (same form factor and footprint) — differing in Architecture, Package, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7980BRMZ
✓ In Stock
$16.8636 / Unit
View Datasheet →AD7980BCPZ-RL7
✓ In Stock
$18 / Unit
View Datasheet →AD7980ACPZ-RL7
✓ In Stock
$8.1 / Unit
View Datasheet →AD7980ARMZRL7
✓ In Stock
$9.2273 / Unit
View Datasheet →AD7980BRMZRL7
✓ In Stock
$10.75 / Unit
View Datasheet →AD7980SRMZ-EP
📋 Reference alternative (not in catalog)
AD7980ARMZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Sampling Rate | 1 MSPS |
| Number of Inputs | 1 |
| Input Type | Pseudo-differential |
| Data Interface | SPI |
| Architecture | SAR |
| Reference Type | External |
| Reference Voltage Range | 2.4 V to 5.1 V |
| Supply Voltage | 2.5 V |
| Power Dissipation | 7 mW at 1 MSPS |
| SNR (Typical) | 91.5 dB |
| Operating Temperature Range | -40°C to +125°C |
| Package | 10-MSOP |
| Mounting Type | Surface Mount |
| Pin Compatibility | Pin-for-pin compatible with AD7982 |
AD7980ARMZ Pin Configuration
| Pin 1 | IN+ — Positive analog input |
| Pin 2 | IN- — Negative analog input (pseudo-differential) |
| Pin 3 | GND — Ground |
| Pin 4 | VDD — Power supply (2.5 V) |
| Pin 5 | REF — Reference voltage input |
| Pin 6 | SDI — Serial data input (for daisy-chaining) |
| Pin 7 | SCK — Serial clock input |
| Pin 8 | SDO — Serial data output |
| Pin 9 | CNV — Convert input (starts conversion) |
| Pin 10 | BUSY — Busy indicator (optional) |
Typical Applications
AD7980ARMZ is suitable for 6 applications: Medical Instrumentation, High-Speed Data Acquisition, Industrial Process Control, Battery-Powered Systems, Precision Measurement Equipment, Portable Instrumentation.
Medical Instrumentation
The AD7980ARMZ's 16-bit resolution and 91.5 dB SNR make it ideal for medical devices such as patient monitors and diagnostic equipment. Its low power dissipation of 7 mW at 1 MSPS is crucial for battery-operated portable medical devices, extending battery life while maintaining high accuracy. The pseudo-differential input helps reject common-mode noise from biological signals, ensuring clean data acquisition. The SPI interface simplifies integration with microcontrollers, and the small MSOP package fits space-constrained designs.
Recommended
High-Speed Data Acquisition
With a 1 MSPS sampling rate and 16-bit resolution, the AD7980ARMZ excels in high-speed data acquisition systems. It captures fast transient signals with high fidelity, making it suitable for test and measurement equipment, vibration analysis, and transient recorders. The SPI interface supports daisy-chaining multiple ADCs, enabling synchronized multi-channel acquisition. Its low power consumption allows dense channel counts without excessive heat generation. The external reference flexibility lets designers optimize the input range for specific signal amplitudes.
Recommended
Industrial Process Control
The AD7980ARMZ is well-suited for industrial process control systems that require precise monitoring of analog signals. Its wide operating temperature range of -40°C to +125°C ensures reliable operation in harsh factory environments. The 16-bit resolution provides fine granularity for control loops, while the 1 MSPS sampling rate enables fast response to process changes. The pseudo-differential input rejects common-mode noise from long sensor cables, improving measurement accuracy. The SPI interface allows easy integration with industrial microcontrollers and PLCs.
Recommended
Battery-Powered Systems
The AD7980ARMZ's low power dissipation of 7 mW at 1 MSPS, which scales linearly with throughput, makes it ideal for battery-powered systems. Portable devices such as handheld multimeters, data loggers, and wireless sensors benefit from extended battery life. The device can be put into a power-down mode between conversions to further reduce energy consumption. Its small MSOP package and SPI interface minimize board space and simplify design. The wide supply voltage range allows operation from a single lithium-ion cell.
Recommended
Precision Measurement Equipment
The AD7980ARMZ delivers 16-bit resolution with no missing codes, making it suitable for precision measurement equipment such as digital multimeters, precision scales, and laboratory instruments. Its high SNR of 91.5 dB ensures accurate readings even with small signal amplitudes. The external reference allows calibration to a known standard, improving absolute accuracy. The SPI interface supports high-speed data transfer to a host processor, enabling real-time measurement updates. The device's low power consumption reduces thermal drift, enhancing measurement stability.
Recommended
Portable Instrumentation
The AD7980ARMZ is perfect for portable instrumentation due to its low power consumption and small footprint. Handheld devices like portable oscilloscopes, spectrum analyzers, and field testers benefit from the 1 MSPS sampling rate and 16-bit resolution. The device operates from a single 2.5 V supply, simplifying power management. Its SPI interface allows direct connection to low-power microcontrollers, and the pseudo-differential input reduces noise pickup in portable environments. The MSOP package is ideal for compact PCB designs.
Recommended
Recommended Products Summary
Engineering reference data for AD7980ARMZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7980BRMZ | AD7980BCPZ-RL7 | AD7980SRMZ-EP |
|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP | 10-LFCSP | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| SNR (Typical) | 91.5 dB | 91.5 dB | 91.5 dB | 91.5 dB |
| Power Dissipation | 7 mW at 1 MSPS | 7 mW at 1 MSPS | 7 mW at 1 MSPS | 7 mW at 1 MSPS |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | -40°C to +125°C | -40°C to +125°C |
| Pin Compatibility | Pin-for-pin with AD7982 | Pin-for-pin with AD7982 | Pin-for-pin with AD7982 | Pin-for-pin with AD7982 |
Key Differentiators
- Pin-for-pin compatible with 18-bit AD7982 (vs AD7980BRMZ)
- Low power dissipation of 7 mW at 1 MSPS (vs AD7980BRMZ)
- Wide operating temperature range of -40°C to +125°C (vs AD7980BRMZ)
Design Notes
The AD7980ARMZ operates from a single 2.5 V supply. Ensure a clean, low-impedance power source with adequate decoupling capacitors (e.g., 10 µF and 0.1 µF) placed close to the VDD pin. The reference voltage (REF) should also be decoupled with a 10 µF capacitor to maintain stability and accuracy.
For optimal performance, place the AD7980ARMZ close to the signal source to minimize trace length and reduce noise pickup. Use a solid ground plane and separate analog and digital ground areas if necessary. The SPI lines (SCK, SDO, SDI) should be kept short and shielded if possible to prevent digital noise from coupling into the analog input.
Avoid driving the analog input beyond the supply rails, as this can damage the device. Ensure the reference voltage is within the specified range (2.4 V to 5.1 V) and is stable. When daisy-chaining multiple ADCs, ensure the SDI pin of the last device is tied to a known logic level to prevent floating inputs.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider AD7980SRMZ-EP.
