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ADA4940-2ACPZ-R7
ADA4940-2ACPZ-R7
| Part Number | ADA4940-2ACPZ-R7 |
|---|---|
| Manufacturer | Analog Devices Inc. (ADI) |
| Category | Integrated Circuits (ICs) > Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps |
| Description | dual-channel, ultralow power, full differential ADC driver featuring a 260MHz bandwidth, 1.25nV/√Hz noise floor, and rail-to-rail outputs, housed in a 24-lead LFCSP package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The ADA4940-2ACPZ-R7 is a dual-channel, low-power fully differential amplifier by ADI, optimized to drive high-resolution SAR and Δ-Σ ADCs. It offers 260 MHz bandwidth, 1.25 nV/√Hz input noise, 1.25mA per channel quiescent current, and operates from 3V to 7V supplies. Rail-to-rail output and adjustable VOCM pin support level shifting and DC coupling for analog signals. Packaged in compact 24-lead LFCSP, it is ideal for high-precision industrial and medical data acquisition circuits.
Core Advantages
Ultra-Low Noise and Low Distortion Performance
Features an exceptional noise floor of 1.25nV/√Hz coupled with outstanding harmonic distortion metrics (-112dB SFDR at 20kHz), guaranteeing uncompromised signal integrity and raw SNR preservation for 16-bit to 18-bit ADC pipelines.
Outstanding Power-to-Bandwidth Efficiency
Achieves a wide 260MHz small-signal bandwidth (3dB) while consuming a mere 1.25mA per channel, making it a stellar component for power-restricted high-density sensor grids or battery-operated field kits.
Fully Differential Architecture with Precise Mode Centering
Employs an independent internal feedback loop that balances output signal symmetry and allows precise user manipulation of the output common-mode voltage level to match target converter inputs precisely.
True Rail-to-Rail Output Headroom Delivery
Equipped with optimized low-impedance rail-to-rail output stages, maximizing dynamic range over low-voltage operating rails and eliminating signal clipping artifacts during peak processing spikes.
Key Specifications
| Brand | Analog Devices Inc. High-Speed Fully Differential Amplifier Series |
|---|---|
| Part Number | ADA4940-2ACPZ-R7 |
| Product Category | Differential Operational Amplifier |
| RoHS Status | RoHS Compliant / Lead-Free / Green Halogen-Free Materials Sourced (“Z” Suffix) |
| Tape & Reel Spec | R7: 7-inch tape reel, 1500pcs per reel |
| EDA/CAD Model | 3D STEP Models, Schematic Symbols, and Pinout Footprint Configurations available upon request |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | 24-LFCSP (4mm × 4mm) |
| Mounting Type | Surface Mount |
| Surface Marking / Silkscreen | 4940-2ACPZ Marking |
| Number of Channels | Dual (2 Independent Channels packed in a single substrate) |
| -3dB Small-Signal Bandwidth | 260 MHz (at Gain = 1 operational loop configuration) |
| Slew Rate Speed | 95 V/μs slew rate |
| Input Voltage Noise Density | 1.25 nV/√Hz at 100 kHz frequency threshold |
| Input Offset Voltage | 350 µV (Max) |
| Input Bias Current | 1.1 µA (Max) |
| Spurious-Free Dynamic Range (SFDR) | -112 dB at 20 kHz / -92 dB at 1 MHz (VOUT = 2V p-p) |
| Output Common-Mode Voltage Range | Adjustable from 0.5V up to (VS – 1.2V) via dedicated VOCM pins |
| Operating Supply Voltage Range | 3.0 V to 7.0 V (Supports single +5V or dual split ±2.5V power delivery topologies) |
| Quiescent Current Consumption | 1.25 mA per channel maximum static draw |
| Output Type | Fully Differential, Rail-to-Rail Output |
| Operating Temperature Range | -40°C to +125°C Industrial Extended Thermal Spectrum (TA) |
Typical Applications
- High-Precision 16-Bit / 18-Bit SAR ADC Drivers and Multi-Channel Buffer Amplifiers
- Differential Single-Ended to Differential Signal Trans-Impedance Conversion Blocks
- Automated Industrial Process Control Instrumentation and Distributed DAQ Cards
- Ultrasound Front-End Transducers, CT Scan Data Nodes, and Patient Vital Monitors
- High-Density Communication Infrastructure Test Gear, Oscilloscopes, and Base-Station Receivers
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
Request datasheets, samples, stock checks and bulk prices via our Quick Inquiry Form. We reply within 24 hours.
Frequently Asked Questions
Q1: Are ADA4940-2ACPZ-R7 parts 100% original?
All stock is brand new genuine ADI original components. Stored under ESD protection, shipped with anti-static moisture barrier tape & reel.
Q2: What do suffix Z and R7 stand for?
Z = lead-free RoHS compliant packaging; R7 means 7-inch reel with 1500pcs, small prototype orders (min 1pc) supported.
Q3: Can this op amp use dual split power supply?
Yes, it works for single supply (3V~7V) or symmetric/asymmetric split supplies, avoids output saturation for signals below GND.
Q4: How to solder the exposed thermal pad of LFCSP package?
Solder the pad to internal PCB copper plane for heat dissipation. It connects to negative power rail for stable thermal drift control.
Q5: What are the main application scenarios of this chip?
Mainly for medical equipment, industrial high-precision data acquisition, 16/18-bit SAR & Δ-Σ ADC driving circuits.
Q6: Can I get free samples for testing?
Free samples are available. Submit sample demand via inquiry form with your company info and project usage.
Q7: How long is the delivery time for bulk orders?
In-stock items ship within 1-3 working days; out-of-stock bulk orders take 2-4 weeks lead time, we can arrange partial shipments.
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