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Analog Devices Inc. ADD8704ARUZ
- Part No.:
- ADD8704ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADD8704ARUZ.pdf
- Description:
- IC OPAMP LCD QUAD 16V 14-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:29,375
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Product details
Overview
ADD8704ARUZ from Analog Devices is a 16 V quad operational amplifier optimized for TFT LCD gamma reference and VCOM drive in notebook and monitor panels. It integrates four functionally differentiated amplifiers (A–D) with rail-to-rail output, 35 mA continuous drive on channels B/C, 250 mA peak VCOM current, and 6 V/µs slew rate. Used as end/midpoint gamma buffers and high-current VCOM drivers in thin portable displays.
For engineers reviewing the ADD8704ARUZ datasheet, ADD8704ARUZ pinout, ADD8704ARUZ application, or ADD8704ARUZ equivalent, key selection criteria include per-channel output swing limits (e.g., Amp A sinks 15 mA to GND; Amp D sources 15 mA to VDD), differential current capability across channels, rail-to-rail input ranges tailored to gamma string positions, and thermal performance in 14-lead TSSOP packaging.
Technical Context
The ADD8704ARUZ employs four distinct amplifier architectures in one die: Amp A uses PNP input for low-rail operation; Amp D uses NPN follower for high-rail sourcing; Amps B and C feature rail-to-rail inputs and symmetric ±35 mA continuous output drive. Each channel has dedicated common-mode voltage range (e.g., Amp D: 1.7 V to VDD; Amp A: 0 to VDD – 1.7 V) and load-specific output voltage compliance (e.g., Amp B VOL = 5 mV at 100 µA, 150 mV at 5 mA).
It delivers stable unity-gain operation into ≥200 pF capacitive loads, supports single-supply operation from 4.5 V to 16 V, and maintains 55° phase margin with 10 kΩ//40 pF load. Channel separation exceeds 75 dB, and PSRR is 70–90 dB over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 16 V - Enables direct integration into standard TFT panel power rails without level-shifting. |
| Continuous Output Current (B/C) | 35 mA - Sufficient to drive VCOM node of mid-size LCD panels under full brightness and fast refresh. |
| Peak Output Current (B/C) | 200 mA - Supports transient VCOM settling during frame inversion without droop or distortion. |
| Slew Rate | 6 V/µs - Ensures <1 µs settling for 10 V step, critical for gamma voltage fidelity in 60+ Hz refresh systems. |
| Input Offset Voltage | 15 mV max - Limits gamma voltage error to <0.1% of 16 V rail, preserving grayscale linearity. |
| Gain Bandwidth Product | 5.8 MHz - Provides adequate loop gain margin for closed-loop gamma buffer configurations up to 100 kHz. |
| Operating Temperature | –40°C to +85°C - Validated for industrial-grade display operation in uncontrolled ambient environments. |
Pinout & Package
ADD8704ARUZ is packaged in a 14-lead TSSOP (RU suffix), 5.0 mm × 4.4 mm × 1.2 mm body, with exposed pad not connected internally. Pin 1 is marked by a dot; device orientation follows JEDEC MO-153AB-1 standard.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amp A - Optimized for low-voltage gamma taps near GND; requires VIN < VS/2 for optimal sinking. |
| 2 | +IN A | Non-inverting input of Amp A - Accepts reference voltage for bottom-end gamma string segment. |
| 3 | V+ | Positive supply rail - Shared 4.5–16 V supply for all four amplifiers; decoupling required at pin. |
| 4 | +IN B | Non-inverting input of Amp B - Configured for mid-range gamma or VCOM reference; rail-to-rail input enables full-scale flexibility. |
| 5 | –IN B | Inverting input of Amp B - Used in unity-gain buffer or feedback path for VCOM regulation loop. |
| 6 | OUT B | Output of Amp B - Delivers ±35 mA continuously; primary VCOM driver or mid-gamma buffer. |
| 7 | OUT C | Output of Amp C - Mirror of OUT B; identical drive strength and rail-to-rail output swing. |
| 8 | –IN C | Inverting input of Amp C - Supports differential or single-ended feedback for precision VCOM control. |
| 9 | +IN C | Non-inverting input of Amp C - Accepts stable DC reference for VCOM generation or gamma midpoint. |
| 10 | V– | Negative supply / GND - Common ground return for all amplifiers; low-impedance PCB plane required. |
| 11 | +IN D | Non-inverting input of Amp D - Designed for top-end gamma voltages; accepts inputs up to VDD. |
| 12 | –IN D | Inverting input of Amp D - Used in high-side gamma buffer configuration; limited sink capability mandates sourcing bias. |
| 13 | OUT D | Output of Amp D - Sources 15 mA continuously; optimized for upper gamma string segments near VDD. |
| 14 | OUT A | Output of Amp A - Sinks 15 mA continuously; optimized for lower gamma string segments near GND. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel optimized architecture | Amp A (low-rail sink), Amp D (high-rail source), Amps B/C (symmetric VCOM drive) - Eliminates need for external discrete buffers in gamma/VCOM circuits. |
| Rail-to-rail output with channel-specific compliance | VOH = 15.75 V (Amp B/C, IL = 5 mA, TA ≤ +85°C); VOL = 50 mV (Amp B/C, IL = 5 mA) - Ensures full 0–16 V gamma range coverage without headroom loss. |
| Capacitive load stability | Unity-gain stable with ≥200 pF loads - Directly drives column driver input capacitance without external isolation resistors. |
| Low-noise operation | 25 nV/√Hz (A/B/C at 10 kHz), 36 nV/√Hz (D at 10 kHz) - Minimizes gamma voltage noise-induced grayscale flicker. |
| Thermal efficiency in TSSOP | θJA = 180°C/W - Enables operation at full 16 V/35 mA load in compact display bezels without forced cooling. |
Applications
| TFT LCD Gamma Reference | VCOM Driver |
|---|---|
Use Scenario: Generating precise, temperature-stable gamma voltage taps (e.g., VG1–VG10) across resistor strings in 1366×768 notebook panels. IC Role / Device Role / Timing Role: Amplifier A/D serve as rail-anchored endpoint buffers; Amplifiers B/C act as midpoint gamma drivers with matched gain and offset. Use Value: 15 mV max offset and 10 µV/°C drift ensure grayscale consistency across operating temperature range without calibration. | Use Scenario: Supplying dynamic common-mode voltage to active-matrix LCD pixels during polarity inversion at 60 Hz. IC Role / Device Role / Timing Role: Amplifiers B and C operate in parallel or redundancy mode to deliver 35 mA continuous + 200 mA peak current to VCOM node. Use Value: 6 V/µs slew rate and 55° phase margin enable sub-µs VCOM settling, eliminating image ghosting during rapid frame transitions. |
| TFT Monitor Panel Interface | Portable Instrumentation Signal Conditioning |
Use Scenario: Driving gamma references and VCOM in 24-inch desktop monitors with dual-channel column drivers and high-resolution timing controllers. IC Role / Device Role / Timing Role: Four independent amplifiers replace discrete op-amp arrays, reducing BOM count and layout area while maintaining channel isolation >75 dB. Use Value: 14-pin TSSOP footprint (5.0 × 4.4 mm) fits tight space constraints behind slim monitor bezels without thermal derating. | Use Scenario: Buffering precision analog outputs (e.g., DAC references, sensor excitation) in handheld test equipment with battery-powered 5–16 V supplies. IC Role / Device Role / Timing Role: Single-supply operation and rail-to-rail I/O allow direct interfacing with 12-bit DACs and low-voltage microcontrollers. Use Value: 700 µA per amplifier quiescent current enables >100-hour battery life in always-on instrumentation modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EL5420IUZ-T7 | Pin-compatible drop-in replacement per Analog Devices documentation; identical 14-pin TSSOP, same per-channel current specs and rail-swing behavior. | Identical TFT gamma/VCOM use cases; validated in same panel designs per manufacturer cross-reference. | Select EL5420IUZ-T7 when legacy design reuse or second-source qualification is required without layout change. |
| AD8648ARUZ | General-purpose rail-to-rail quad op-amp; 70 mA output current per channel but no channel-specific optimization; 22 V/µs slew rate, 2.7–5.5 V supply only. | Not suitable for 16 V TFT gamma strings or VCOM drive; limited to low-voltage signal conditioning and sensor buffering. | Choose AD8648ARUZ only for non-display applications requiring higher speed and lower noise below 5.5 V supply. |
Compared with EL5420IUZ-T7, ADD8704ARUZ offers identical pinout and functional equivalence for TFT panel use; versus AD8648ARUZ, it provides 16 V operation, channel-differentiated drive, and gamma-specific input ranges-making it irreplaceable in high-voltage display systems.
Availability
ADD8704ARUZ is available at Aetrix Electronics and suitable for TFT LCD monitor panels, TFT LCD notebook panels, and portable instrumentation requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for ADD8704ARUZ 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 ADD8704ARUZ belongs to Analog Devices' display interface amplifier product line, engineered specifically for gamma correction and VCOM drive in cost-sensitive, space-constrained TFT LCD systems.
FAQ
What is the maximum supply voltage rating for the ADD8704ARUZ?
The ADD8704ARUZ has an absolute maximum supply voltage of 18 V, with recommended operating range from 4.5 V to 16 V. Operation at 16 V is fully characterized across –40°C to +85°C, supporting direct integration into standard TFT panel power domains without regulation. Exceeding 18 V risks permanent damage per Absolute Maximum Ratings Table 3.
How does the ADD8704ARUZ differ from standard quad op-amps in LCD applications?
The ADD8704ARUZ integrates four functionally distinct amplifiers-A (low-rail sink), D (high-rail source), and B/C (symmetric VCOM drive)-each with tailored input ranges, output compliance, and current capability. Standard quads like AD8648ARUZ lack this channel differentiation, making them unsuitable for gamma string endpoint buffering or high-current VCOM generation in 16 V TFT systems.
Can the ADD8704ARUZ drive capacitive loads typical of LCD column drivers?
Yes. The ADD8704ARUZ is unity-gain stable with ≥200 pF capacitive loads, verified in Figure 26 and Application Information section. Its 6 V/µs slew rate and 55° phase margin ensure stable transient response into column driver input capacitance without external isolation components-critical for avoiding gamma voltage ringing in high-resolution panels.
What is the thermal resistance (θJA) of the ADD8704ARUZ in its TSSOP package?
The ADD8704ARUZ in 14-lead TSSOP (RU) package has a junction-to-ambient thermal resistance (θJA) of 180°C/W under JEDEC-standard board conditions. This value assumes worst-case mounting on a 2-layer PCB with minimal copper; actual performance improves with thermal vias and ground-plane coupling, enabling full 16 V/35 mA operation in compact display assemblies.
Is the ADD8704ARUZ pin-compatible with the EL5420 series?
Yes. The ADD8704ARUZ is explicitly documented as a drop-in replacement for EL5420, sharing identical 14-lead TSSOP pinout, electrical specifications, and functional channel mapping. This compatibility is confirmed in the "Drop-in replacement for EL5420" feature list and Ordering Guide, enabling seamless migration in existing TFT panel designs.
ADD8704ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- TFT-LCD Panels: Gamma Buffer, VCOM Driver
- Output Type:
- -
- Number of Circuits:
- 4
- -3db Bandwidth:
- 6.8 MHz
- Slew Rate:
- 6V/µs
- Current - Supply:
- 2.8 mA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 16V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
ADD8704ARUZ FAQ
1.How can I place an order for ADD8704ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADD8704ARUZ 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 ADD8704ARUZ reliable?
The price and inventory of ADD8704ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADD8704ARUZ is usually 5 days.
3.What payment methods are accepted for ADD8704ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADD8704ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADD8704ARUZ?
ADD8704ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADD8704ARUZ 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 ADD8704ARUZ?
For technical support, including ADD8704ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADD8704ARUZ requirements.
6.How does Aetrix verify that ADD8704ARUZ is sourced from the original manufacturer or authorized distributors?
All ADD8704ARUZ 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 ADD8704ARUZ meets industry standards.
7.What is the process for return or replacement of ADD8704ARUZ?
All ADD8704ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADD8704ARUZ, 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 ADD8704ARUZ part is unused and in its original packaging.
Return procedure for ADD8704ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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