ADA4940-1ACPZ-RL7 - Ultralow Power Differential ADC Driver | ADI
MPN: ADA4940-1ACPZ-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.33 | $6.33 |
| 10 | $5.82 | $58.20 |
| 100 | $5.12 | $512.00 |
| 500 | $4.61 | $2,305.00 |
| 1,000 | $4.1 | $4,100.00 |
Drop-in alternatives for ADA4940-1ACPZ-RL7 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesADA4940-1ACPZ-RL7 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Differential |
| Number of Circuits | 1 |
| Output Type | Differential |
| Slew Rate | [DATA_NEEDED: Slew Rate] |
| Gain Bandwidth Product | [DATA_NEEDED: Gain Bandwidth Product] |
| Current - Input Bias | [DATA_NEEDED: Current - Input Bias] |
| Voltage - Input Offset | [DATA_NEEDED: Voltage - Input Offset] |
| Current - Supply | 1.25 mA |
| Current - Output / Channel | [DATA_NEEDED: Current - Output / Channel] |
| Voltage - Supply Span (Min) | [DATA_NEEDED: Voltage - Supply Span (Min)] |
| Voltage - Supply Span (Max) | [DATA_NEEDED: Voltage - Supply Span (Max)] |
| Operating Temperature | [DATA_NEEDED: Operating Temperature] |
| Package / Case | 16-LFCSP-VQ (3x3) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADA4940-1ACPZ-RL7 Pin Configuration
| Pin 1 | OUT+ β Positive differential output |
| Pin 2 | VOCM β Output common-mode voltage control |
| Pin 3 | V- β Negative supply voltage |
| Pin 4 | IN- β Inverting input |
| Pin 5 | IN+ β Non-inverting input |
| Pin 6 | V+ β Positive supply voltage |
| Pin 7 | PD β Power-down control |
| Pin 8 | OUT- β Negative differential output |
| Pin 9 | EP β Exposed pad, connect to 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
ADA4940-1ACPZ-RL7 is suitable for 6 applications: SAR ADC Driver, Sigma-Delta ADC Driver, Portable Medical Devices, Industrial Process Control, Communication Systems, Battery-Powered Instrumentation.
SAR ADC Driver
The ADA4940-1ACPZ-RL7 is ideal for driving SAR ADCs with resolutions up to 18 bits. Its low noise and distortion ensure accurate conversion, while its 1.25 mA quiescent current minimizes power consumption in battery-powered systems. The adjustable output common-mode voltage allows direct interface to the ADC input range, simplifying the design. With a bandwidth of DC to 1 MHz, it supports a wide range of signal frequencies. The small 3x3 mm LFCSP package saves board space in multi-channel data acquisition systems.
Recommended
Sigma-Delta ADC Driver
For sigma-delta ADCs, the ADA4940-1ACPZ-RL7 provides the low noise and low distortion needed to preserve signal integrity. Its ultralow power consumption is beneficial in portable instruments where battery life is critical. The device's adjustable common-mode output ensures proper biasing of the ADC input, reducing external components. The wide bandwidth supports high-frequency signals up to 1 MHz, making it suitable for audio and vibration analysis. The compact package enables dense PCB layouts in multi-channel systems.
Recommended
Portable Medical Devices
In portable medical devices like patient monitors and glucose meters, the ADA4940-1ACPZ-RL7's low power consumption extends battery life. Its low noise is critical for accurate biopotential measurements. The small package allows for miniaturization of the device. The amplifier's ability to drive high-resolution ADCs ensures precise data acquisition. The adjustable common-mode voltage simplifies interfacing with various sensor outputs.
Recommended
Industrial Process Control
The ADA4940-1ACPZ-RL7 is well-suited for industrial process control systems that require high accuracy and low power. It can drive ADCs that monitor temperature, pressure, and flow with 18-bit resolution. Its low distortion ensures faithful reproduction of sensor signals. The wide supply voltage range accommodates industrial power rails. The compact package is ideal for space-constrained control modules.
Recommended
Communication Systems
In communication systems, the ADA4940-1ACPZ-RL7 provides the low noise and high linearity needed for driving ADCs in receivers. Its low power consumption is beneficial in battery-operated communication devices. The differential output helps reject common-mode interference, improving signal quality. The small package allows for high-density integration in RF front-ends. The adjustable common-mode voltage facilitates interfacing with various ADC input stages.
Recommended
Battery-Powered Instrumentation
The ADA4940-1ACPZ-RL7 is perfect for battery-powered instrumentation where power efficiency is paramount. Its 1.25 mA quiescent current is among the lowest in its class. It can drive high-resolution ADCs for data loggers and handheld meters. The low noise ensures accurate measurements even with small signals. The compact package is ideal for portable devices.
Recommended
Recommended Products Summary
Engineering reference data for ADA4940-1ACPZ-RL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4940-1ACPZ-R7 | ADA4940-1ACPZ-RL | ADA4945-1ACPZ-R2 |
|---|---|---|---|---|
| Package | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) | 16-LFCSP-VQ (3x3) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Quiescent Current | 1.25 mA | 1.25 mA | 1.25 mA | [DATA_NEEDED] |
| Supply Voltage Range | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Bandwidth | 1 MHz | 1 MHz | 1 MHz | [DATA_NEEDED] |
| Noise | Low | Low | Low | Low |
| Distortion | Low | Low | Low | Low |
| Output Common-Mode Adjustable | Yes | Yes | Yes | Yes |
Key Differentiators
- Ultralow power consumption (vs ADA4945-1ACPZ-R2)
- Pin-to-pin compatibility with ADA4945-1 (vs ADA4945-1ACPZ-R2)
- Optimized for PULSAR ADCs (vs Generic differential amplifiers)
Design Notes
For optimal performance, place decoupling capacitors (0.1 uF and 10 uF) close to the V+ and V- pins. Use a solid ground plane and minimize trace lengths for the differential outputs. The exposed pad (EP) should be soldered to the ground plane for thermal and electrical stability.
Keep the differential input and output traces symmetrical and closely coupled to minimize common-mode noise. Avoid routing high-speed digital signals near the amplifier. Use ground fills around the amplifier to reduce parasitic capacitance.
Do not drive a purely capacitive load directly, as it can cause ringing and instability due to bond wire inductance. Use a small series resistor (e.g., 10-50 ohms) if a capacitive load is unavoidable. Also, ensure the VOCM pin is properly driven to set the output common-mode voltage within the ADC's input range.
Compliance Information
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated.
