ADA4941-1ARZ - 18-Bit Differential ADC Driver | Analog Devices
MPN: ADA4941-1ARZ ✓ 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 — 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
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4940-1ARZ
⚡ Same Package📋 Reference alternative (not in catalog)
ADA4940-1ARZ-R7
⚡ Same Package📋 Reference alternative (not in catalog)
ADA4895-1ARZ
⚡ Same Package✓ In Stock
$2.19 / Unit
View Datasheet →ADA4941-1ARZ Maximum Ratings & Electrical Characteristics
| Type | Differential ADC Driver |
| Configuration | Single-ended to differential, G = +2 |
| Supply Voltage | 3 V to 5 V (single supply) |
| Quiescent Current | 1.25 mA (typical) |
| THD | 120 dBc at 10 kHz |
| SNR | 97 dB at 100 kHz, 4 V p-p |
| Output Noise | [DATA_NEEDED: output noise density] |
| Bandwidth | [DATA_NEEDED: -3 dB bandwidth] |
| Slew Rate | [DATA_NEEDED: slew rate] |
| Input Impedance | High (typical) |
| Output Common-Mode Range | Adjustable via VOCM pin |
| Package | 8-Lead SOIC (ARZ) |
| Operating Temperature Range | -40°C to +125°C |
| RoHS Compliant | Yes |
| Process Technology | XFCB (eXtra fast complementary bipolar) |
ADA4941-1ARZ Pin Configuration
| Pin 1 | VOCM — Output common-mode voltage set point |
| Pin 2 | VIN- — Inverting input |
| Pin 3 | VIN+ — Non-inverting input |
| Pin 4 | VEE — Negative supply (ground for single supply) |
| Pin 5 | VOUT- — Inverting output |
| Pin 6 | VOUT+ — Non-inverting output |
| Pin 7 | VCC — Positive supply |
| 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 is suitable for 6 applications: Driving 16-bit and 18-bit PulSAR ADCs, Industrial Process Control, Medical Instrumentation, Communications Systems, Test and Measurement Equipment, Portable and Battery-Powered Devices.
Driving 16-bit and 18-bit PulSAR ADCs
The ADA4941-1ARZ is specifically designed to drive high-resolution SAR ADCs such as the AD7687, AD7690, and AD7691. Its low noise and distortion ensure that the ADC's performance is not degraded. The single-ended to differential conversion allows direct interface with differential inputs, maximizing dynamic range. With a gain of +2, it provides the required signal swing for full-scale ADC input. The low power consumption makes it suitable for battery-powered data acquisition systems.
Recommended
Industrial Process Control
In industrial process control, precise measurement of sensor signals is critical. The ADA4941-1ARZ converts single-ended sensor outputs to differential signals for high-resolution ADCs, improving noise immunity in noisy industrial environments. Its low power and small SOIC package make it ideal for distributed control modules. The high input impedance minimizes loading on sensors, preserving signal integrity. The device's wide temperature range (-40°C to +125°C) ensures reliable operation in harsh conditions.
Recommended
Medical Instrumentation
Medical devices such as patient monitors and diagnostic equipment require high accuracy and low noise. The ADA4941-1ARZ provides the necessary signal conditioning for biopotential and imaging sensors, converting single-ended signals to differential for high-resolution ADCs. Its low power consumption extends battery life in portable devices. The ultralow distortion ensures faithful reproduction of physiological signals. The device's small footprint allows for compact medical device designs.
Recommended
Communications Systems
In communications systems, the ADA4941-1ARZ is used to interface analog baseband signals to high-speed ADCs in receivers. Its differential output reduces common-mode noise and improves dynamic range, essential for maintaining signal integrity in RF and IF chains. The device's low distortion is critical for minimizing intermodulation products. With a 3 V supply, it is compatible with low-voltage digital signal processors. The high input impedance allows direct connection to filters and mixers.
Recommended
Test and Measurement Equipment
The ADA4941-1ARZ is ideal for test and measurement equipment such as data acquisition cards and spectrum analyzers. Its high SNR and low distortion ensure accurate signal analysis. The single-ended to differential conversion simplifies interfacing with various sensors and signal sources. The device's low power consumption is beneficial for multi-channel systems. The SOIC package is easy to integrate into existing PCB designs.
Recommended
Portable and Battery-Powered Devices
For portable devices, power efficiency is paramount. The ADA4941-1ARZ operates from a 3 V supply and draws only 1.25 mA quiescent current, making it ideal for battery-powered applications. Its low noise and distortion ensure high-quality signal processing in audio and sensor applications. The small SOIC package saves board space. The device's wide temperature range allows use in outdoor and automotive environments.
Recommended
Recommended Products Summary
Engineering reference data for ADA4941-1ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4941-1YRZ | ADA4940-1ARZ | ADA4895-1ARZ |
|---|---|---|---|---|
| Package | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Configuration | Single-ended to differential, G=+2 | Single-ended to differential, G=+2 | Fully differential, adjustable gain | Single-ended op amp |
| Supply Voltage | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 2.7 V to 12 V |
| Quiescent Current | 1.25 mA | 1.25 mA | 1.25 mA | 2.3 mA |
| THD at 10 kHz | 120 dBc | 120 dBc | 120 dBc | 100 dBc |
| SNR at 100 kHz | 97 dB | 97 dB | 97 dB | 90 dB |
| Output Type | Differential | Differential | Differential | Single-ended |
Key Differentiators
- Fixed gain of +2 simplifies design (vs ADA4940-1ARZ)
- Optimized for single-ended sources (vs ADA4940-1ARZ)
- Lower quiescent current than ADA4895-1 (vs ADA4895-1ARZ)
Design Notes
The ADA4941-1ARZ operates from a single 3 V to 5 V supply. Use a low-noise LDO regulator to supply VCC and VEE (ground) to minimize power supply noise. Place 0.1 uF and 10 uF decoupling capacitors close to the VCC and VEE pins. For best performance, keep the analog supply separate from digital supplies to avoid coupling noise.
For optimal noise performance, use a solid ground plane and minimize trace lengths. Place the ADA4941-1 close to the ADC to reduce parasitic capacitance and inductance. Use precision resistors (0.1% tolerance) for the gain-setting network to maintain accuracy. Ensure the feedback network is symmetrical to preserve balance.
Do not exceed the absolute maximum supply voltage of 5.5 V. The VOCM pin should be bypassed with a 0.1 uF capacitor to ground to set the output common-mode voltage. Avoid driving capacitive loads greater than 100 pF without a series resistor, as this may cause instability. Always refer to the datasheet for the recommended application circuit.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
