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Analog Devices Inc. ADA4861-3YRZ
- Part No.:
- ADA4861-3YRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4861-3YRZ.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:211
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Product details
Overview
ADA4861-3YRZ from Analog Devices is a high-speed, low-cost, current-feedback triple operational amplifier in a 14-lead SOIC_N package, delivering 730 MHz −3 dB bandwidth (±5 V), 625–910 V/μs slew rate, and 12 ns settling time to 0.5%. It features independent power-down pins per amplifier, 0.01% differential gain, and 0.02° differential phase-optimized for RGB video driver, ADC buffer, and active filter applications.
For engineers reviewing the ADA4861-3YRZ datasheet, ADA4861-3YRZ pinout, ADA4861-3YRZ application, or ADA4861-3YRZ equivalent, key selection criteria include its current-feedback architecture, 14-pin SOIC_N footprint with three dedicated POWER-DOWN terminals, supply range (5 V single-ended or ±5 V dual), and verified 100 MHz 0.1 dB flatness under ±5 V operation.
Technical Context
The ADA4861-3YRZ employs a current-feedback topology with transimpedance gain stage, enabling wide bandwidth independent of closed-loop gain-unlike voltage-feedback op amps. Its −IN input presents low impedance (~90 Ω), while +IN offers high impedance (15 MΩ), requiring matched feedback resistors (e.g., RF = RG = 301 Ω for G = +2) to maintain stability and bandwidth.
Each of the three amplifiers integrates an independent POWER-DOWN pin referenced to −VS, allowing selective shutdown with <0.5 mA/quiescent amplifier current. The device operates across −40°C to +105°C and supports both single-supply (5 V) and dual-supply (±5 V) configurations with rail-to-rail output swing into 150 Ω loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 730 MHz at G = +1, ±5 V - enables baseband video and high-frequency signal conditioning without gain-dependent bandwidth loss. |
| Slew Rate | 910 V/μs (rising, ±5 V) - supports fast transient response for 2 V p-p signals with minimal distortion in video reconstruction. |
| Settling Time | 12 ns to 0.5% - ensures accurate pixel-level settling in high-resolution video DAC buffering and sampling systems. |
| Differential Gain/Phase | 0.01% / 0.02° - meets broadcast-grade video fidelity requirements for RGB and composite video signal paths. |
| Power-Down Current | 0.3 mA/amplifier - reduces total quiescent current from 18 mA to <1 mA when two amplifiers are disabled. |
| Input Common-Mode Range | −3.7 V to +3.7 V (±5 V) - allows dc-coupled inputs in dual-supply video and instrumentation front-ends. |
| Output Drive | ±3.65 V into 150 Ω - delivers full-swing video levels compliant with 75 Ω cable termination standards. |
Pinout & Package
The ADA4861-3YRZ is housed in a 14-lead SOIC_N (Small Outline Integrated Circuit, Narrow) package, 8.75 mm × 4.00 mm, with 1.27 mm pitch, JEDEC MS-012-AB compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | POWER DOWN 1/2/3 | Independent TTL-compatible enable/disable control per amplifier; tied to −VS to disable, left open or <−4 V to enable (±5 V). |
| 4 | +VS | Positive supply pin; accepts 5 V to 12 V (single) or +5 V (dual); requires 0.1 µF + 2.2–47 µF bypassing. |
| 5, 10 | +IN 1, +IN 3 | Noninverting inputs; high-impedance (15 MΩ), low capacitance (1.5 pF) - suitable for high-Z sensor or DAC outputs. |
| 6, 9 | −IN 1, −IN 3 | Inverting inputs; low-impedance (~90 Ω) - mandates precise RF/RG matching to avoid peaking or instability. |
| 7, 8, 14 | OUT 1, OUT 3, OUT 2 | Amplifier outputs; capable of ±3.65 V swing into 150 Ω and sourcing/sinking 100 mA short-circuit current. |
| 11 | −VS | Negative supply pin; required for dual-supply operation (e.g., −5 V); defines power-down threshold reference. |
| 12, 13 | +IN 2, −IN 2 | Noninverting/inverting inputs for Amplifier 2; identical electrical characteristics to Amplifier 1 and 3. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables stable high bandwidth across gains (e.g., 730 MHz at G = +1, 370 MHz at G = +2) without compensation trade-offs. |
| Triple independent amplifiers | Supports simultaneous RGB channel driving or multi-path signal conditioning in one compact SOIC_N footprint. |
| Per-amplifier power-down | Reduces system-level power by >85% when only one amplifier is active-critical for portable or thermally constrained designs. |
| Video-optimized linearity | 0.01% differential gain and 0.02° differential phase meet SMPTE 253M and ITU-R BT.601 broadcast video specs. |
| Wide supply flexibility | Operates from 5 V single supply or ±5 V dual supply-simplifies integration into legacy video gear and new embedded systems. |
Applications
| RGB Video Driver | ADC Buffer Stage |
|---|---|
Use Scenario: Driving three synchronized analog RGB video signals from a graphics processor or video DAC to 75 Ω coaxial cables. IC Role / Device Role / Timing Role: Triple current-feedback op amp configured as unity-gain or G = +2 buffers with series 75 Ω output termination and shunt 75 Ω input termination. Use Value: Maintains 0.1 dB flatness to 100 MHz and <0.02° phase error-preserving color fidelity and edge sharpness in HD/UXGA displays. |
Use Scenario: Isolating and driving high-speed SAR or pipeline ADC inputs in data acquisition systems operating up to 100 MSPS. IC Role / Device Role / Timing Role: Low-distortion, fast-settling buffer between anti-alias filter and ADC sample-and-hold input. Use Value: 12 ns settling time and −85 dBc HD2 at 5 MHz ensure <1 LSB error for 14-bit ADCs sampling at 50+ MSPS. |
| 20 MHz Active Low-Pass Filter | Professional Camera Signal Chain |
Use Scenario: Implementing a 6-pole Sallen-Key reconstruction filter after a video DAC to suppress imaging artifacts above 20 MHz. IC Role / Device Role / Timing Role: Three-stage cascaded current-feedback amplifier forming a high-order low-pass transfer function with G = +2 per stage. Use Value: Achieves 23 dB gain and flat passband to 22 MHz-meeting DVI/HDMI analog compliance requirements without external compensation. |
Use Scenario: Conditioning Y/C or component video signals in broadcast cameras where thermal headroom and long-term reliability are critical. IC Role / Device Role / Timing Role: Triple amplifier handling luminance (Y), chrominance (C), and sync signal paths with independent power management. Use Value: Extended temperature range (−40°C to +105°C) and 150°C junction limit support continuous operation in sealed camera housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed triple op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4862-3YRZ | Integrated 301 Ω RF/RG resistors per channel; eliminates external gain-setting components and reduces board area by ~30%. | Better suited for fixed-G = +2 video drivers where layout simplicity and repeatability outweigh design flexibility. | Select ADA4862-3YRZ when minimizing BOM count and PCB real estate is prioritized over variable gain configuration. |
| THS3203DR | Higher slew rate (1600 V/μs) but no power-down pins; wider supply range (±15 V); higher quiescent current (12 mA/amplifier). | Preferred for high-voltage, high-fidelity test equipment where dynamic range exceeds video requirements. | Choose THS3203DR only if >±10 V output swing or >1 GHz small-signal bandwidth is required-otherwise ADA4861-3YRZ offers superior cost/power/video performance balance. |
Compared with ADA4862-3YRZ and THS3203DR, the ADA4861-3YRZ uniquely balances low cost, per-channel power-down control, and broadcast-grade video linearity in a standard SOIC_N package-making it optimal for cost-sensitive, thermally constrained, and multi-channel video systems.
Availability
ADA4861-3YRZ is available at Aetrix Electronics and suitable for consumer video equipment, professional broadcast gear, and high-speed data acquisition systems requiring stable component supply, extended temperature operation, and consistent parametric performance across production lots.
Supply support for ADA4861-3YRZ 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, with R&D and manufacturing facilities worldwide.
The ADA4861-3YRZ belongs to Analog Devices' high-speed current-feedback op amp product line, designed specifically for demanding video, imaging, and instrumentation applications where bandwidth, settling accuracy, and power efficiency must coexist.
FAQ
What is the maximum recommended feedback resistor value for stable operation of the ADA4861-3YRZ?
The ADA4861-3YRZ datasheet specifies 301 Ω as the recommended feedback resistor for G = +2 operation. Increasing RF beyond this value reduces closed-loop bandwidth and may degrade phase margin; values above 604 Ω are not characterized for stability. For G = +1, RF = 499 Ω is validated. Exceeding these values risks peaking or oscillation, especially with capacitive loads.
Can the ADA4861-3YRZ operate from a 3.3 V supply?
No-the ADA4861-3YRZ has a minimum operating supply voltage of 5 V (single-ended) or ±5 V (dual). Operation below 5 V is outside specification and not guaranteed; output swing, bandwidth, and slew rate degrade significantly below rated supply. For 3.3 V systems, consider the ADA4851-3 or ADA4891-3 families instead.
How should unused POWER-DOWN pins be terminated on the ADA4861-3YRZ?
Unused POWER-DOWN pins on the ADA4861-3YRZ must be tied to −VS (not left floating) to ensure reliable amplifier enablement. In single-supply operation (+5 V, −VS = 0 V), connect PDx to ground. In dual-supply (±5 V), connect PDx to −5 V. Floating pins risk erratic enable/disable behavior due to noise coupling.
Does the ADA4861-3YRZ support dc-coupled inputs in single-supply mode?
Yes-the ADA4861-3YRZ supports dc-coupled inputs in single-supply mode when the input common-mode voltage remains within 1.2 V to 3.8 V (at +5 V supply). External biasing (e.g., resistor dividers or reference ICs) is required to establish valid input offset, as shown in Figure 53 of the datasheet.
What is the thermal resistance (θJA) of the ADA4861-3YRZ in its SOIC_N package?
The ADA4861-3YRZ in the 14-lead SOIC_N package has a specified junction-to-ambient thermal resistance (θJA) of 90°C/W on a JEDEC-standard 4-layer board. This value assumes proper PCB copper pour, ground plane coverage, and decoupling-actual θJA improves with added copper area and airflow.
ADA4861-3YRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 680V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 370 MHz
- Current - Input Bias:
- 2.9 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 17.9mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
ADA4861-3YRZ FAQ
1.How can I place an order for ADA4861-3YRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4861-3YRZ 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 ADA4861-3YRZ reliable?
The price and inventory of ADA4861-3YRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4861-3YRZ is usually 5 days.
3.What payment methods are accepted for ADA4861-3YRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4861-3YRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4861-3YRZ?
ADA4861-3YRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4861-3YRZ 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 ADA4861-3YRZ?
For technical support, including ADA4861-3YRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4861-3YRZ requirements.
6.How does Aetrix verify that ADA4861-3YRZ is sourced from the original manufacturer or authorized distributors?
All ADA4861-3YRZ 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 ADA4861-3YRZ meets industry standards.
7.What is the process for return or replacement of ADA4861-3YRZ?
All ADA4861-3YRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4861-3YRZ, 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 ADA4861-3YRZ part is unused and in its original packaging.
Return procedure for ADA4861-3YRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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