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Analog Devices Inc. ADA4939-1YCPZ-R7
- Part No.:
- ADA4939-1YCPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADA4939-1YCPZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
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Product details
Overview
ADA4939-1YCPZ-R7 from Analog Devices is a single-channel, ultralow distortion differential ADC driver optimized for high-resolution (up to 16-bit) data acquisition systems. It delivers −102 dBc HD2 at 10 MHz, 1.4 GHz −3 dB bandwidth (G = 2), and 2.3 nV/√Hz input voltage noise, operating from 3.3 V to 5 V supplies in RF/IF receiver front-ends and precision instrumentation signal chains.
For engineers reviewing the ADA4939-1YCPZ-R7 datasheet, ADA4939-1YCPZ-R7 pinout, ADA4939-1YCPZ-R7 application, or ADA4939-1YCPZ-R7 equivalent, key selection criteria include differential gain stability ≥2, user-adjustable VOCM, fast overdrive recovery (<1 ns), and LFCSP-16 package thermal performance (θJA = 98°C/W) for high-density PCB layouts.
Technical Context
The ADA4939-1YCPZ-R7 employs a dual-feedback architecture: differential-mode control via external resistor networks (RF/RG) and independent common-mode regulation through the VOCM pin. Its SiGe bipolar process enables simultaneous high slew rate (6800 V/μs at 5 V) and low harmonic distortion across dc to 100 MHz.
It supports both single-ended-to-differential and differential-to-differential configurations with externally adjustable gain, while internal common-mode feedback ensures exceptional output balance (−64 dB error at 10 MHz) and suppression of even-order harmonics-critical for driving SAR and pipeline ADCs without degrading ENOB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 1400 MHz at G = 2 - supports wideband IF sampling up to 700 MHz Nyquist zone |
| HD2 @ 10 MHz | −102 dBc - preserves SFDR > 100 dB in 16-bit ADC interfaces |
| Slew Rate | 6800 V/μs - enables full-scale step response without slewing-induced distortion |
| Input Voltage Noise | 2.3 nV/√Hz - minimizes added noise in low-amplitude sensor signal chains |
| Overdrive Recovery | <1 ns - prevents settling errors after ADC input overload events |
| Supply Range | 3.3 V to 5 V - interoperable with modern low-voltage ADCs and FPGA I/O banks |
| Quiescent Current | 36.5 mA typical - balances performance and power in thermally constrained designs |
Pinout & Package
The ADA4939-1YCPZ-R7 is housed in a 3 mm × 3 mm, 16-lead LFCSP (Lead Frame Chip Scale Package) with exposed pad, requiring connection to ground for optimal thermal and electrical performance (θJA = 98°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−FB) | Negative feedback node | Connects to external resistor network for differential gain setting and stability |
| 2 (+IN) | Positive input summing node | Primary signal input for single-ended or differential input configurations |
| 3 (−IN) | Negative input summing node | Completes differential input pair; matched impedance critical for CMRR |
| 4 (+FB) | Positive feedback node | Completes feedback loop; paired with −FB to define closed-loop gain |
| 5–8 (+VS) | Positive supply rails | Four dedicated pins reduce supply inductance and improve PSRR above 10 MHz |
| 9 (VOCM) | Output common-mode voltage control | DC-biases differential outputs to match ADC input range; bandwidth 670 MHz |
| 10 (+OUT) | Positive differential output | Drives +IN of differential ADC; requires matched trace length to −OUT |
| 11 (−OUT) | Negative differential output | Drives −IN of differential ADC; symmetry with +OUT ensures balance |
| 12 (PD) | Power-down enable | Logic-high (>2 V) disables amplifier; quiescent current drops to 0.32 mA |
| 13–16 (−VS) | Negative supply rails | Four ground-return paths minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow harmonic distortion | −102 dBc HD2 at 10 MHz enables >16-bit ENOB preservation in demanding ADC interfaces |
| Adjustable output common-mode voltage | VOCM pin allows precise alignment of differential output swing to ADC input range (e.g., 0.9–4.1 V) |
| Stable for differential gains ≥2 | Eliminates need for gain-dependent compensation; simplifies design across G = 2 to G = 5 |
| Fast overdrive recovery & slew rate | <1 ns recovery + 6800 V/μs slew ensures clean transient response in burst-mode receivers |
| Single-supply operation | 3.3 V to 5 V range supports direct interfacing with LVDS, CMOS, and JESD204B ADCs |
Applications
| RF Receiver Front-End | High-Speed Data Acquisition |
|---|---|
Use Scenario: Driving the differential input of a 16-bit, 125 MSPS pipeline ADC in a cellular base station IF stage with 70 MHz center frequency. IC Role / Device Role / Timing Role: Differential ADC driver providing gain, level shifting, and distortion-limited signal conditioning before digitization. Use Value: −83 dBc HD2 at 70 MHz ensures SFDR remains > 90 dB, preserving dynamic range for adjacent channel interference rejection. | Use Scenario: Conditioning low-level sensor outputs (e.g., piezoelectric accelerometers) for digitization in precision test equipment. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with gain and common-mode biasing for noise-sensitive analog front-ends. Use Value: 2.3 nV/√Hz input noise and ±0.5 mV offset minimize added error, enabling sub-LSB accuracy in 16-bit systems. |
| Medical Imaging Signal Chain | High-Fidelity Line Driver |
Use Scenario: Amplifying and buffering ultrasound echo signals prior to digitization in portable imaging systems. IC Role / Device Role / Timing Role: Low-noise, wideband differential buffer isolating sensitive transducer circuits from ADC loading effects. Use Value: 1.4 GHz bandwidth and <1 ns overdrive recovery support multi-MHz pulse-echo timing resolution without waveform distortion. | Use Scenario: Transmitting balanced analog video or high-fidelity audio over twisted-pair cables in broadcast infrastructure. IC Role / Device Role / Timing Role: Differential line driver delivering robust EMI immunity and common-mode noise rejection. Use Value: −64 dB output balance error and −83 dB CMRR suppress cable-induced common-mode interference, maintaining signal integrity over 10+ meter runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH5401RTVT | Higher 18 GHz GBW but higher 3.6 nV/√Hz noise; fixed-gain options only | Better for >1 GHz IF sampling; less suitable for low-noise baseband gain blocks | Select LMH5401RTVT when bandwidth >3 GHz required and noise floor <4 nV/√Hz is acceptable |
| THS4561IRGET | Lower 1.8 GHz bandwidth, 2.8 nV/√Hz noise, integrated VOCM buffer, lower 24 mA IQ | Optimized for battery-powered portable instruments with moderate bandwidth needs | Select THS4561IRGET for space-constrained, low-power designs where 1.8 GHz BW suffices |
Compared with LMH5401RTVT and THS4561IRGET, the ADA4939-1YCPZ-R7 uniquely balances ultralow distortion (−102 dBc HD2), wide 1.4 GHz bandwidth, and 2.3 nV/√Hz noise-making it optimal for high-SFDR, medium-power 16-bit ADC interfaces where both fidelity and speed are critical.
Availability
ADA4939-1YCPZ-R7 is available at Aetrix Electronics and suitable for RF receiver front-ends, high-speed data acquisition systems, medical imaging signal chains, and high-fidelity line drivers requiring stable component supply and guaranteed long-term availability.
Supply support for ADA4939-1YCPZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADA4939-1YCPZ-R7 belongs to Analog Devices' precision high-speed amplifier product line, engineered specifically for driving high-resolution ADCs in communications, instrumentation, and medical imaging applications where distortion, noise, and bandwidth must be simultaneously optimized.
FAQ
What is the maximum recommended operating temperature for the ADA4939-1YCPZ-R7?
The ADA4939-1YCPZ-R7 is specified for continuous operation from −40°C to +105°C ambient temperature. Junction temperature must not exceed 150°C; with θJA = 98°C/W, this limits safe power dissipation to ~1.5 W at 85°C ambient per Figure 4 in the datasheet. Thermal design must ensure adequate PCB copper area under the exposed pad.
Can the ADA4939-1YCPZ-R7 operate with a single 3.3 V supply?
Yes, the ADA4939-1YCPZ-R7 supports single-supply operation from 3.3 V to 5 V. At 3.3 V, it maintains 1400 MHz −3 dB bandwidth and −100 dBc HD2 at 10 MHz, though slew rate reduces to 5000 V/μs and output swing narrows to 0.8–2.5 V (single-ended). VOCM input range adjusts to 1.3–1.9 V accordingly.
How does the VOCM pin function in the ADA4939-1YCPZ-R7?
The VOCM pin on the ADA4939-1YCPZ-R7 sets the DC common-mode level of the differential outputs (+OUT/−OUT). It accepts a voltage between 1.3 V and 3.5 V (at 5 V supply) and drives the outputs to VOUT,cm = VOCM with 0.98 V/V gain and 670 MHz bandwidth. This allows precise matching to ADC input ranges without external level-shifting circuitry.
Is the ADA4939-1YCPZ-R7 pin-compatible with the dual-channel ADA4939-2?
No, the ADA4939-1YCPZ-R7 (16-lead LFCSP) is not pin-compatible with the ADA4939-2 (24-lead LFCSP). Their pinouts differ fundamentally: ADA4939-1 uses shared +VS/−VS rails and a single VOCM, while ADA4939-2 has separate supply and VOCM pins for each channel. PCB layout and schematic symbols are not interchangeable.
What is the minimum external gain configuration supported by the ADA4939-1YCPZ-R7?
The ADA4939-1YCPZ-R7 is stable for differential gains ≥2 using standard four-resistor feedback networks. Gain = 1 is not supported without additional external compensation. Recommended configurations use RF = 402 Ω and RG = 200 Ω for G = 2, or scaled values for G = 3.16 and G = 5, as validated in Figures 7–10 of the datasheet.
ADA4939-1YCPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 6800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.4 GHz
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 36.5mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (3x3)
ADA4939-1YCPZ-R7 FAQ
1.How can I place an order for ADA4939-1YCPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4939-1YCPZ-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADA4939-1YCPZ-R7 reliable?
The price and inventory of ADA4939-1YCPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4939-1YCPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4939-1YCPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4939-1YCPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4939-1YCPZ-R7?
ADA4939-1YCPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4939-1YCPZ-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADA4939-1YCPZ-R7?
For technical support, including ADA4939-1YCPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4939-1YCPZ-R7 requirements.
6.How does Aetrix verify that ADA4939-1YCPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4939-1YCPZ-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADA4939-1YCPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4939-1YCPZ-R7?
All ADA4939-1YCPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4939-1YCPZ-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADA4939-1YCPZ-R7 part is unused and in its original packaging.
Return procedure for ADA4939-1YCPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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