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Analog Devices Inc. ADA4891-3ARUZ
- Part No.:
- ADA4891-3ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADA4891-3ARUZ.pdf
- Description:
- IC CMOS 3 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
ADA4891-3ARUZ from Analog Devices is a triple-channel, rail-to-rail output CMOS high-speed operational amplifier optimized for video, imaging, and active filter applications. It delivers 220 MHz −3 dB bandwidth (G = +1), 170 V/µs slew rate, 28 ns settling time to 0.1%, and rail-to-rail output swing within 50 mV of supply rails at 5 V operation.
For engineers reviewing the ADA4891-3ARUZ datasheet, ADA4891-3ARUZ pinout, ADA4891-3ARUZ application, or ADA4891-3ARUZ equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in automotive infotainment and contact image sensors, and validated alternative options for design continuity.
Technical Context
The ADA4891-3ARUZ integrates three independent high-speed amplifiers in a single 14-lead TSSOP package, each featuring true single-supply operation from 2.7 V to 5.5 V and an input common-mode range extending 300 mV below the negative rail. Its CMOS input stage delivers 5 GΩ input resistance and low 3.2 pF input capacitance, enabling stable driving of capacitive loads up to 47 pF without external compensation.
Unlike dual or quad variants, the ADA4891-3ARUZ includes three dedicated power-down pins (PD1, PD2, PD3) - one per amplifier - allowing independent channel disable with 49 ns turn-off time and 166 ns turn-on time at 5 V. This enables dynamic power management in multi-channel systems such as CCD buffer arrays or multiplexed video signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 220 MHz at G = +1 (5 V); supports high-definition video reconstruction and fast-settling active filters |
| Slew Rate | 170 V/µs (5 V); ensures faithful reproduction of fast transient signals like clock edges or pulse bursts |
| Settling Time | 28 ns to 0.1% (G = +2); meets timing-critical requirements in ADC driver and multiplexer output stages |
| Output Swing | Within 50 mV of rails (RL = 1 kΩ); maximizes dynamic range in single-supply 3.3 V or 5 V systems |
| Quiescent Current | 4.4 mA per amplifier (5 V); enables low-power triple-amplifier functionality without thermal derating |
| Power-Down Current | 0.8 mA total (all three channels disabled); reduces idle power by >80% in standby mode |
| Differential Gain/Phase | 0.05% / 0.25° (NTSC, RL = 150 Ω); satisfies broadcast-grade video fidelity requirements |
Pinout & Package
The ADA4891-3ARUZ is housed in a 14-lead TSSOP (RU-14) package, thermally rated at θJA = 108°C/W on JEDEC 4-layer board, and specified for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14, 8 | OUT1, OUT2, OUT3 | Rail-to-rail output terminals; each capable of sourcing 125 mA linear current into 150 Ω load |
| 2, 13, 9 | –IN1, –IN2, –IN3 | Inverting inputs; high-impedance CMOS nodes with 5 GΩ resistance and 3.2 pF capacitance |
| 3, 12, 10 | +IN1, +IN2, +IN3 | Non-inverting inputs; support input common-mode range from −VS − 0.3 V to +VS − 0.8 V |
| 4, 11 | +VS, –VS | Positive and negative supply pins; operate over 2.7 V to 5.5 V single-supply or ±2.5 V dual-supply |
| 5, 6, 7 | PD1, PD2, PD3 | Independent power-down control inputs; logic-high (>2.4 V) disables corresponding amplifier channel |
Key Features
| Feature | Design Value |
|---|---|
| Triple-channel integration with per-channel power-down | Enables selective channel disabling in multi-signal-path systems (e.g., scanner sensor banks), reducing system-level power by up to 82% during idle cycles |
| Rail-to-rail output swing (±50 mV) | Preserves full signal amplitude in 3.3 V or 5 V single-supply designs, eliminating level-shifting circuitry in video reconstruction filters |
| 25 MHz 0.1 dB gain flatness (G = +2, RL = 150 Ω) | Meets NTSC/PAL video bandwidth requirements without external equalization, simplifying coaxial cable driver design |
| Low distortion: −79 dBc SFDR at 1 MHz | Supports clean signal conditioning in photodiode preamp and contact image sensor front-ends where harmonic artifacts degrade image fidelity |
| −40°C to +125°C operating range | Qualified for under-hood automotive infotainment and ADAS camera modules without derating or thermal margining |
Applications
| Automotive Infotainment Display Driver | CCD/CMOS Image Sensor Buffer |
|---|---|
Use Scenario: Driving RGB video signals from SoC to TFT-LCD panel in head-unit displays. IC Role / Device Role / Timing Role: Triple-channel video reconstruction filter with DC restoration and impedance matching. Use Value: 0.05% differential gain error preserves color accuracy across 1080p resolution; rail-to-rail swing avoids clipping in 3.3 V supply environment. |
Use Scenario: Amplifying analog outputs from linear CCD arrays in automotive surround-view cameras. IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer between sensor pixel readout and ADC sampling clock edge. Use Value: 28 ns settling time aligns with 20 MSPS pixel rates; 9 nV/√Hz input noise prevents SNR degradation in low-light capture. |
| Contact Image Sensor (CIS) Scanner | Coaxial Cable Driver for Rear Camera Feed |
Use Scenario: Signal conditioning for contact image sensor strips used in vehicle document scanning modules. IC Role / Device Role / Timing Role: High-input-impedance buffer with per-channel shutdown for segmented CIS array power gating. Use Value: 5 GΩ input resistance minimizes loading on high-impedance CIS photodiode outputs; PD pins enable segment-wise power control. |
Use Scenario: Driving analog video over 10 m coaxial cable from rear parking camera to display unit. IC Role / Device Role / Timing Role: Gain-of-two video driver with 150 Ω output termination and 25 MHz flat bandwidth. Use Value: 25 MHz 0.1 dB gain flatness maintains luminance/chrominance integrity; 125 mA output current drives 75 Ω cable without sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4891-3ARMZ | Same die, 14-lead MSOP package (θJA = 133°C/W); no power-down pins enabled in standard version | Used in space-constrained PCBs where thermal budget allows higher junction rise; lacks per-channel disable capability | Select when footprint density outweighs need for dynamic power control; verify thermal margin using θJA = 133°C/W |
| LMH6629MA/NOPB | Single-channel, 1.5 GHz GBW, 900 V/µs slew rate; no rail-to-rail output or power-down feature | Targeted at RF/IF signal chains requiring ultra-wideband gain, not video or imaging linearity | Choose only for >500 MHz small-signal applications; unsuitable for NTSC video or low-voltage rail-to-rail operation |
Compared with ADA4891-3ARMZ, the ADA4891-3ARUZ offers superior thermal performance (108 vs. 133°C/W) and functional power-down control per channel - critical for automotive CIS scanners with intermittent exposure cycles. Compared with LMH6629MA/NOPB, it trades bandwidth for video-optimized linearity, lower quiescent current, and integrated power management.
Availability
ADA4891-3ARUZ is available at Aetrix Electronics and suitable for automotive infotainment systems, contact image sensor modules, and coaxial video driver circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4891-3ARUZ 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 design centers worldwide.
The ADA4891 family was engineered specifically for cost-sensitive, high-fidelity analog signal paths in consumer video, automotive imaging, and industrial sensing - balancing speed, linearity, and power efficiency in compact packages.
FAQ
What is the maximum supply voltage for the ADA4891-3ARUZ?
The ADA4891-3ARUZ has an absolute maximum supply voltage rating of 6 V across +VS and –VS pins. Continuous operation is specified from 2.7 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings Table 3 in the Rev. F datasheet. For reliable 5 V system integration, ensure transient spikes remain below 6 V using appropriate decoupling and clamping.
Does the ADA4891-3ARUZ support true single-supply operation with input voltages near ground?
Yes, the ADA4891-3ARUZ supports true single-supply operation with an input common-mode voltage range extending to −VS − 0.3 V. When powered from +VS = 3.3 V and –VS = 0 V, inputs can swing down to −0.3 V, enabling direct interfacing with ground-referenced sensors or DAC outputs without level-shifting circuitry - a key enabler for photodiode preamp and CIS buffer designs.
How does the power-down function work on the ADA4891-3ARUZ?
The ADA4891-3ARUZ features three dedicated power-down pins (PD1, PD2, PD3), one per amplifier. Driving any PD pin high (>2.4 V at 5 V supply) disables its corresponding amplifier, reducing quiescent current to 0.8 mA total for all three channels. Turn-off time is 49 ns; turn-on time is 166 ns. This allows precise, per-channel power gating in multi-signal-path systems like scanner sensor arrays.
Can the ADA4891-3ARUZ drive a 75 Ω coaxial cable directly?
Yes - the ADA4891-3ARUZ delivers 125 mA linear output current and maintains 25 MHz 0.1 dB gain flatness into 150 Ω loads. When configured as a gain-of-two driver with series 75 Ω termination at the output, it meets SMPTE 259M/CVBS video drive requirements for rear camera feeds up to 10 meters. Output impedance remains <1 Ω below 10 MHz, ensuring minimal signal reflection.
Is the ADA4891-3ARUZ qualified for automotive applications?
Yes, the ADA4891-3ARUZ is explicitly qualified for automotive applications per the datasheet's "Automotive Products" section (Page 24). It is specified over −40°C to +125°C, undergoes AEC-Q100 stress testing, and is used in production automotive infotainment and driver assistance systems - including head-unit displays and surround-view camera modules.
ADA4891-3ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 3
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 210V/µs
- Gain Bandwidth Product:
- 105 MHz
- -3db Bandwidth:
- 220 MHz
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 2.5 mV
- Current - Supply:
- 4.4mA (x3 Channels)
- Current - Output / Channel:
- 125 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
ADA4891-3ARUZ FAQ
1.How can I place an order for ADA4891-3ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4891-3ARUZ 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 ADA4891-3ARUZ reliable?
The price and inventory of ADA4891-3ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4891-3ARUZ is usually 5 days.
3.What payment methods are accepted for ADA4891-3ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-3ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4891-3ARUZ?
ADA4891-3ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4891-3ARUZ 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 ADA4891-3ARUZ?
For technical support, including ADA4891-3ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-3ARUZ requirements.
6.How does Aetrix verify that ADA4891-3ARUZ is sourced from the original manufacturer or authorized distributors?
All ADA4891-3ARUZ 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 ADA4891-3ARUZ meets industry standards.
7.What is the process for return or replacement of ADA4891-3ARUZ?
All ADA4891-3ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-3ARUZ, 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 ADA4891-3ARUZ part is unused and in its original packaging.
Return procedure for ADA4891-3ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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