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Analog Devices Inc. ADA4950-1YCPZ-R7
- Part No.:
- ADA4950-1YCPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADA4950-1YCPZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,339
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Product details
Overview
ADA4950-1YCPZ-R7 from Analog Devices is a single-channel, low-power, gain-selectable differential ADC driver IC with configurable gains of 1, 2, or 3. It delivers 750 MHz −3 dB small-signal bandwidth (G = 1), 9 ns 0.1% settling time, and 108 dB SFDR at 10 MHz, operating on ±5 V or +5 V/0 V supplies. It is used in high-speed data acquisition systems to convert single-ended signals to matched differential outputs for precision ADC interfacing.
For engineers reviewing the ADA4950-1YCPZ-R7 datasheet, ADA4950-1YCPZ-R7 pinout, ADA4950-1YCPZ-R7 application, or ADA4950-1YCPZ-R7 equivalent, key selection criteria include its selectable gain architecture, user-adjustable VOCM, 9.5 mA quiescent current per amplifier, output balance error of −62 dB, and compatibility with 16-lead 3 mm × 3 mm LFCSP packaging for RF-sensitive layouts.
Technical Context
The ADA4950-1YCPZ-R7 employs an internal SiGe complementary bipolar process to achieve low distortion and noise at low power. Its on-chip feedback and gain resistors enable precise closed-loop gain configuration without external components, while the dedicated VOCM input allows dynamic alignment of output common-mode voltage to match ADC input requirements.
It supports both single-ended-to-differential and differential-to-differential operation, with input common-mode range shifted down by 1 VBE and output balance maintained via internal common-mode feedback. The power-down (PD) pin provides 28 ns turn-on and 600 ns turn-off control, reducing supply current to ≤1.0 mA in standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 750 MHz at G = 1, enabling baseband-to-IF signal conditioning up to UHF frequencies. |
| SFDR | 108 dBc @ 10 MHz, ensuring minimal harmonic contamination in 12–16-bit ADC front-ends. |
| Settling Time | 9 ns to 0.1%, critical for sampling rates ≥100 MSPS with minimal aperture uncertainty. |
| Quiescent Current | 9.5 mA per amplifier, supporting portable or thermally constrained high-speed systems. |
| Output Balance Error | −62 dB, suppressing even-order harmonics and improving differential signal fidelity. |
| VOCM Bandwidth | 250 MHz small-signal bandwidth, allowing fast common-mode tracking in time-interleaved ADCs. |
| Gain Options | Factory-configurable G = 1, 2, or 3 via external resistor networks-no internal switching. |
Pinout & Package
The ADA4950-1YCPZ-R7 is housed in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP package with exposed paddle (EPAD) for thermal and electrical grounding. Pin 17 (EPAD) must be soldered to a ground or power plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INB (Pin 1) | Positive Input B | 250 Ω input impedance; used alone for G = 2 or tied to +INA for G = 3. |
| +INA (Pin 2) | Positive Input A | 500 Ω input impedance; used alone for G = 1 or tied to +INB for G = 3. |
| −INA (Pin 3) | Negative Input A | 500 Ω input impedance; used alone for G = 1 or tied to −INB for G = 3. |
| −INB (Pin 4) | Negative Input B | 250 Ω input impedance; used alone for G = 2 or tied to −INA for G = 3. |
| +VS (Pins 5–8) | Positive Supply | Four parallel connections reduce supply inductance and improve PSRR above 100 MHz. |
| VOCM (Pin 9) | Output Common-Mode Voltage | DC- and AC-coupled input sets differential output midpoint; 250 MHz bandwidth supports dynamic adjustment. |
| +OUT (Pin 10) | Positive Output | Differential output terminal; optimized layout minimizes asymmetry-induced imbalance. |
| −OUT (Pin 11) | Negative Output | Differential output terminal; symmetric routing required to maintain −62 dB balance. |
| PD (Pin 12) | Power-Down Control | CMOS-compatible input; ≤(+VS – 2.5 V) disables amplifier, reducing IQ to ≤1.0 mA. |
| −VS (Pins 13–16) | Negative Supply | Four parallel connections enhance return path integrity and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Selectably configured gain | G = 1, 2, or 3 realized via external resistor networks-no internal switches or gain errors >1.2%. |
| Adjustable VOCM interface | 1.0 V/V gain with −60 dB CMRR enables precise matching to ADC input common-mode range across temperature. |
| Low-noise SiGe architecture | 9.2 nV/√Hz output-referred noise at G = 1 ensures minimal SNR degradation in wideband receivers. |
| Fast overdrive recovery | 20 ns recovery from 5 V ramp overdrive (G = 2) prevents data corruption during transient input excursions. |
| Thermally enhanced LFCSP | θJA = 91°C/W enables sustained 750 MHz operation at +105°C ambient with minimal derating. |
Applications
| High-Speed Data Acquisition | Communications IF Sampling |
|---|---|
Use Scenario: Driving 14-bit, 125 MSPS pipeline ADCs in radar digitizers with 70 MHz IF input. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with VOCM-aligned output swing and <9 ns settling. Use Value: Enables full-scale utilization of ADC input range while maintaining SFDR >100 dBc up to 20 MHz. |
Use Scenario: Conditioning 45–90 MHz quadrature IF signals in LTE basestation transceivers. IC Role / Device Role / Timing Role: Differential gain block with matched phase response and −62 dB output balance. Use Value: Reduces image rejection loss by minimizing even-order distortion in IQ demodulation paths. |
| Medical Ultrasound Beamforming | Test & Measurement Digitizers |
Use Scenario: Amplifying echo return signals from 5–15 MHz transducer arrays before digitization. IC Role / Device Role / Timing Role: Low-noise, low-distortion ADC driver with 9.2 nV/√Hz noise floor and G = 2 configuration. Use Value: Preserves weak echo signal integrity and improves dynamic range by >2 bits versus legacy drivers. |
Use Scenario: Front-end signal conditioning in 1 GHz bandwidth oscilloscope channels. IC Role / Device Role / Timing Role: Wideband differential buffer with 750 MHz bandwidth and 0.1 dB flatness to 210 MHz. Use Value: Maintains amplitude accuracy and phase linearity across full instrument bandwidth without peaking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4940-1ACPZ-R7 | Lower power (4.5 mA), narrower bandwidth (520 MHz), no gain select; fixed G = 1 only. | Better suited for battery-powered portable instruments where bandwidth ≤500 MHz suffices. | Choose ADA4940-1 when power budget is tighter and gain flexibility is unnecessary. |
| THS4561IRGET | Higher quiescent current (13.5 mA), wider bandwidth (1.8 GHz), no integrated VOCM loop. | Requires external VOCM circuitry; better for ultra-wideband (>1 GHz) direct RF sampling. | Choose THS4561 when >1 GHz bandwidth is mandatory and VOCM can be externally managed. |
Compared with ADA4940-1ACPZ-R7 and THS4561IRGET, the ADA4950-1YCPZ-R7 uniquely balances gain configurability, VOCM integration, and 750 MHz performance at 9.5 mA-making it optimal for mid-bandwidth, multi-gain, thermally constrained ADC interfaces.
Availability
ADA4950-1YCPZ-R7 is available at Aetrix Electronics and suitable for high-speed data acquisition, communications IF sampling, medical ultrasound beamforming, and test & measurement digitizers requiring stable component supply and long-term production continuity.
Supply support for ADA4950-1YCPZ-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 ADA4950-x family was designed specifically for high-fidelity, low-power differential driving of precision ADCs in demanding instrumentation and communications infrastructure applications.
FAQ
What gain configurations does the ADA4950-1YCPZ-R7 support?
The ADA4950-1YCPZ-R7 supports three discrete closed-loop gain settings: G = 1, G = 2, and G = 3. These are implemented using on-chip feedback and gain resistors, selected by external resistor network connections to pins +INB, +INA, −INA, and −INB. No internal switching or digital control is involved-the gain is set statically at board level.
How is the output common-mode voltage controlled on the ADA4950-1YCPZ-R7?
The ADA4950-1YCPZ-R7 uses a dedicated VOCM pin (Pin 9) to set the output common-mode voltage. Applying a DC or AC-coupled voltage to this pin directly controls the midpoint of the differential output swing with 0.98–1.01 V/V gain and −60 dB CMRR. This allows precise alignment to the input common-mode requirement of downstream ADCs without external op amps.
What is the thermal performance of the ADA4950-1YCPZ-R7 in its LFCSP package?
The ADA4950-1YCPZ-R7 in its 3 mm × 3 mm, 16-lead LFCSP package has a junction-to-ambient thermal resistance (θJA) of 91°C/W when mounted on a standard 4-layer JEDEC board with the exposed paddle soldered to a solid ground plane. This enables reliable operation up to +105°C ambient at full 750 MHz bandwidth with appropriate PCB copper area.
Does the ADA4950-1YCPZ-R7 support single-supply operation?
Yes-the ADA4950-1YCPZ-R7 operates from a single +5 V supply (with −VS = 0 V) as well as dual ±5 V or ±2.5 V supplies. In single-supply mode, VOCM is typically biased at 2.5 V, and specifications such as 770 MHz small-signal bandwidth and 220 MHz 0.1 dB flatness remain valid per the datasheet's 5 V operation tables.
What is the purpose of the PD (power-down) pin on the ADA4950-1YCPZ-R7?
The PD pin (Pin 12) enables low-latency power management: asserting PD ≤(+VS – 2.5 V) disables the amplifier, reducing quiescent current to ≤1.0 mA, while asserting PD ≥(+VS – 1.8 V) enables operation with 28 ns turn-on time. This feature supports burst-mode acquisition, sleep/wake cycling, and thermal throttling in portable or high-density systems using ADA4950-1YCPZ-R7.
ADA4950-1YCPZ-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:
- 2900V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 750 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 9.5mA
- Current - Output / Channel:
- 114 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (3x3)
ADA4950-1YCPZ-R7 FAQ
1.How can I place an order for ADA4950-1YCPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4950-1YCPZ-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 ADA4950-1YCPZ-R7 reliable?
The price and inventory of ADA4950-1YCPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4950-1YCPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4950-1YCPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4950-1YCPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4950-1YCPZ-R7?
ADA4950-1YCPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4950-1YCPZ-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 ADA4950-1YCPZ-R7?
For technical support, including ADA4950-1YCPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4950-1YCPZ-R7 requirements.
6.How does Aetrix verify that ADA4950-1YCPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4950-1YCPZ-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 ADA4950-1YCPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4950-1YCPZ-R7?
All ADA4950-1YCPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4950-1YCPZ-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 ADA4950-1YCPZ-R7 part is unused and in its original packaging.
Return procedure for ADA4950-1YCPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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