ADA4941-1ARZ-RL7 - Differential ADC Driver | Analog Devices
MPN: ADA4941-1ARZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for ADA4941-1ARZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADA4941-1YRZ-R7
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ADA4941-1ARZ
✅ Drop-In✓ In Stock
$2.88 / Unit
View Datasheet →ADA4940-1ARZ
⚡ Same Package📋 Reference alternative (not in catalog)
THS4521
⚡ Same Package📋 Reference alternative (not in catalog)
LTC6363HMS8-2#PBF
⚡ Same Package✓ In Stock
$3.75 / Unit
View Datasheet →ADA4941-1ARZ-RL7 Maximum Ratings & Electrical Characteristics
| Type | Differential ADC Driver |
| Number of Channels | 1 |
| Gain | +2 (fixed) |
| Supply Voltage | 3 V to 5 V (single supply) |
| Supply Current | 1.25 mA (typical) |
| THD | 120 dBc at 10 kHz |
| SNR | 97 dB at 100 kHz, 4 V p-p |
| Input Impedance | High |
| Output Type | Differential |
| Package | 8-Lead SOIC (SOIC-8) |
| Operating Temperature Range | -40°C to +125°C |
| RoHS | Compliant |
| REACH | Compliant |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (RL7) |
ADA4941-1ARZ-RL7 Pin Configuration
| Pin 1 | OUT+ — Positive differential output |
| Pin 2 | V- — Negative supply (ground in single-supply operation) |
| Pin 3 | IN- — Inverting input (connected to ground for gain +2) |
| Pin 4 | IN+ — Non-inverting input (signal input) |
| Pin 5 | V+ — Positive supply |
| Pin 6 | OUT- — Negative differential output |
| Pin 7 | VOCM — Output common-mode voltage (typically left floating or connected to reference) |
| Pin 8 | NC — No connect |
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
ADA4941-1ARZ-RL7 is suitable for 6 applications: Driving 16-bit and 18-bit SAR ADCs, Medical Imaging Systems, Industrial Process Control, Portable Instrumentation, Communication Systems, Test and Measurement Equipment.
Driving 16-bit and 18-bit SAR ADCs
The ADA4941-1ARZ-RL7 is specifically optimized to drive high-resolution SAR ADCs such as the AD7687, AD7690, and AD7691. Its low noise (97 dB SNR) and low distortion (120 dBc THD) ensure that the ADC's performance is not degraded. The fixed gain of +2 simplifies the interface, and the differential output provides the balanced drive required by these ADCs. This application is critical in precision data acquisition systems where signal integrity is paramount.
Recommended
Medical Imaging Systems
In medical imaging equipment such as ultrasound and MRI, high-resolution ADCs are used to digitize analog signals. The ADA4941-1ARZ-RL7 provides the low noise and low distortion necessary to preserve image quality. Its low power consumption (1.25 mA) is beneficial for portable or battery-powered medical devices. The single-supply operation simplifies power supply design, and the small SOIC package saves board space.
Recommended
Industrial Process Control
Industrial process control systems require accurate measurement of sensors and transducers. The ADA4941-1ARZ-RL7 drives the ADC that digitizes these signals, ensuring high fidelity. Its wide supply voltage range (3 V to 5 V) allows operation from common industrial power rails. The device's robustness over -40°C to +125°C makes it suitable for harsh industrial environments.
Recommended
Portable Instrumentation
Portable instruments such as handheld multimeters and data loggers benefit from the ADA4941-1ARZ-RL7's low power consumption and small footprint. The device operates from a 3 V supply, making it compatible with battery-powered systems. Its high input impedance minimizes loading on the sensor, and the differential output improves noise immunity in electrically noisy environments.
Recommended
Communication Systems
In communication systems, the ADA4941-1ARZ-RL7 can be used to drive ADCs in receivers and base stations. Its high dynamic range (97 dB SNR) is essential for handling weak signals in the presence of strong interferers. The low distortion ensures that the signal is not corrupted, maintaining the integrity of the communication link. The device's low power is advantageous in remote or battery-powered communication nodes.
Recommended
Test and Measurement Equipment
Test and measurement equipment such as oscilloscopes and spectrum analyzers require high-speed, high-resolution ADCs. The ADA4941-1ARZ-RL7 provides the necessary drive with low noise and distortion, ensuring accurate measurements. Its single-ended to differential conversion is ideal for interfacing with various signal sources. The device's wide temperature range and reliability make it suitable for professional test equipment.
Recommended
Recommended Products Summary
Engineering reference data for ADA4941-1ARZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4941-1YRZ-R7 | ADA4941-1ARZ | ADA4940-1ARZ | THS4521 |
|---|---|---|---|---|---|
| Package | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Gain Configuration | Fixed +2 | Fixed +2 | Fixed +2 | Adjustable | Adjustable |
| Input Type | Single-ended | Single-ended | Single-ended | Differential | Differential |
| Supply Voltage Range | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 2.7 V to 7 V | 2.7 V to 5.5 V |
| Supply Current | 1.25 mA | 1.25 mA | 1.25 mA | 1.25 mA | 1.1 mA |
| THD at 10 kHz | 120 dBc | 120 dBc | 120 dBc | 120 dBc | 120 dBc |
| SNR at 100 kHz | 97 dB | 97 dB | 97 dB | 97 dB | 95 dB |
Key Differentiators
- Fixed gain of +2 simplifies design (vs ADA4940-1ARZ)
- Single-ended to differential conversion (vs THS4521)
- Optimized for PulSAR ADCs (vs LTC6363)
Design Notes
The ADA4941-1ARZ-RL7 operates from a single 3 V to 5 V supply. Ensure that the supply is well decoupled with a 0.1 µF ceramic capacitor placed close to the V+ pin. The low quiescent current of 1.25 mA makes it suitable for battery-powered applications, but the supply voltage must remain within the specified range to maintain performance.
For optimal performance, place the ADA4941-1ARZ-RL7 close to the ADC it drives to minimize trace length and parasitic capacitance. Use a solid ground plane and avoid routing high-speed digital signals near the analog input and output traces. The differential output traces should be routed as a pair with controlled impedance to maintain signal integrity.
A common mistake is to leave the VOCM pin unconnected when the ADC requires a specific common-mode voltage. The VOCM pin can be driven by a reference voltage to set the output common-mode level. Additionally, ensure that the input signal is within the common-mode input range of the amplifier to avoid clipping. Refer to the datasheet for the recommended input and output voltage ranges.
Compliance Information
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified.
