ADA4938-1ACPZ-R2 Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
ADA4938-1ACPZ-R2 is an ultralow distortion fully differential ADC driver amplifier from Analog Devices, featuring 75dB CMRR and 18µA max bias current in a 16-pad QFN package. It is optimized for driving high-resolution ADC inputs with voltage-feedback architecture and internal frequency compensation. Available from stock worldwide with competitive pricing.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- ADA4938-1ACPZ-R2 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.7612(MOQ 23)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ADA4938-1ACPZ-R2?
- 75 dB common-mode rejection ratio suppresses noise and interference at the ADC differential input for accurate conversions
- 18 µA maximum bias current and 4000 µV offset voltage enable precision signal conditioning in data acquisition front-ends
- Voltage-feedback architecture with internal frequency compensation simplifies gain setting and bandwidth management for 12-bit to 18-bit ADC drivers
What is ADA4938-1ACPZ-R2 used for?
ADA4938-1ACPZ-R2 is designed for driving the differential inputs of high-speed ADCs in test and measurement, medical imaging, and communications infrastructure equipment. Its ultralow distortion and 75dB CMRR make it ideal for conditioning single-ended signals into differential form at the ADC front-end, maximizing the signal-to-noise ratio in 12-bit to 18-bit conversion stages. The 16-pad QFN package supports compact PCB layouts in data acquisition modules and software-defined radio receivers.
What are the specifications of ADA4938-1ACPZ-R2?
| Pbfree Code | No |
| Manufacturer Package Code | CP-16-21 |
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 18 µA |
| Bias Current-Max (IIB) @25C | 18 µA |
| Common-mode Reject Ratio-Nom | 75dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 4000 µV |
| JESD-30 Code | S-PQCC-N16 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Neg Supply Voltage Limit-Max | -6 V |
| Neg Supply Voltage-Nom (Vsup) | -5 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC16,.12SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Power | NO |
| Programmable Power | NO |
| Slew Rate-Nom | 4700V/us |
| Supply Current-Max | 40mA |
| Supply Voltage Limit-Max | 6V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Voltage Gain-Min | 0.95 |
| Wideband | YES |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the ADA4938-1ACPZ-R2 datasheet?
ADA4938-1ACPZ-R2 Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for ADA4938-1ACPZ-R2?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What CMRR specification does ADA4938-1ACPZ-R2 achieve, and how does that benefit differential ADC input signal conditioning?
ADA4938-1ACPZ-R2 achieves a nominal 75 dB common-mode rejection ratio, attenuating common-mode noise such as power supply ripple and ground interference by over 5600-fold. This preserves signal integrity when converting a single-ended analog source to a differential 0V to 2.5V swing matched to a 16-bit ADC input range.
How does the 18 µA maximum bias current of ADA4938-1ACPZ-R2 affect source impedance matching at the amplifier input?
With an 18 µA maximum input bias current, ADA4938-1ACPZ-R2 introduces less than 1.8 mV of error across a 100Ω source impedance. For ADC drivers upstream of precision SAR or delta-sigma converters, this low bias current allows source resistors of up to 1 kΩ without significant gain error in the signal chain.
Why is ADA4938-1ACPZ-R2 preferred over a single-ended op-amp as an ADC driver for a high-resolution data acquisition system?
ADA4938-1ACPZ-R2 directly generates a balanced differential output matched to a high-resolution ADC's 2-wire differential input, removing the need for a separate balun or transformer. The 75 dB CMRR rejects the ground-plane noise that degrades a single-ended driver by as much as 10 bits at 16-bit ADC resolution, and the ultralow distortion maintains THD below -90 dBc at signal frequencies up to 10 MHz.
How does the 16-pad QFN package of ADA4938-1ACPZ-R2 support compact layout near a high-speed ADC on a multilayer PCB?
The CP-16-21 QFN package measures approximately 3 mm x 3 mm, allowing ADA4938-1ACPZ-R2 to be placed within 5 mm of the ADC differential input pins. This short trace length minimizes parasitic inductance at the differential inputs, keeping the ADC settling error below half an LSB at 100 MSPS conversion rates.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 23+ | $8.9553 | $205.97 |
| 29+ | $8.6568 | $251.05 |
| 39+ | $7.7612 | $302.69 |
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