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Analog Devices Inc. ADD8505WRUZ
- Part No.:
- ADD8505WRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADD8505WRUZ.pdf
- Description:
- IC AMP TFT-LCD 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,875
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Product details
Overview
ADD8505WRUZ from Analog Devices is a 5-channel muxed-input LCD gamma reference buffer designed to drive column driver gamma inputs in line inversion LCD panels. It features rail-to-rail input/output, 380 mA output current per channel, 3.9 mA supply current, and operates from 3.3 V to 6.5 V over −40°C to +105°C - enabling use in automotive infotainment display biasing.
For engineers reviewing the ADD8505WRUZ datasheet, ADD8505WRUZ pinout, ADD8505WRUZ application, or ADD8505WRUZ equivalent, key selection criteria include channel count (5), A/B input multiplexing for dual gamma curve selection, high-current rail-to-rail output capability, thermal robustness for automotive ambient conditions, and Pb-free TSSOP-20 packaging compatibility with automated SMT assembly.
Technical Context
The ADD8505WRUZ implements five independent CMOS buffer channels, each with dual analog inputs (INAx/INBx) and a shared logic-controlled A/B select terminal that determines which input drives the corresponding output. Its architecture supports dynamic gamma correction by switching between positive and negative inversion reference ladders.
Each output delivers ≥120 mA short-circuit current with 7.0 V/μs slew rate and 6 μs settling time into 200 pF/10 kΩ loads, ensuring stable driving of high-impedance resistor ladders without series isolation resistors. Power integrity is maintained via dedicated VCC1/VCC2 and dual GND pins to manage peak current transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 5 independent gamma reference buffer channels with A/B input selection |
| Supply Voltage Range | 3.3 V to 6.5 V - supports direct connection to common display power rails |
| Output Current | 380 mA short-circuit current per channel - ensures robust driving of gamma ladder networks |
| Supply Current | 4.4 mA typical at 25°C - enables low-power biasing in battery-sensitive portable displays |
| Operating Temperature | −40°C to +105°C - qualified for under-hood and dashboard-mounted automotive LCD systems |
| Slew Rate | 7.0 V/μs (CL = 15 pF) - maintains fast transient response during gamma voltage transitions |
| Input Offset Voltage | 20 mV max - minimizes gray-scale distortion across full temperature range |
Pinout & Package
ADD8505WRUZ is housed in a 20-lead Pb-free thin shrink small outline package (TSSOP-20, RU-20), measuring 6.5 mm × 4.4 mm × 1.2 mm, with 0.65 mm lead pitch and JEDEC MO-153-AC compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA5 | Buffer Input A (Channels 1–5) | Selectable gamma reference voltage input for positive inversion curve |
| INB1–INB5 | Buffer Input B (Channels 1–5) | Selectable gamma reference voltage input for negative inversion curve |
| OUT1–OUT5 | Buffer Output (Channels 1–5) | High-current rail-to-rail output driving column driver gamma inputs |
| VCC1, VCC2 | Power Supply Inputs | Dual VCC pins reduce IR drop and improve PSRR under dynamic load |
| GND (Pins 13, 14) | Ground Terminals | Dual ground connections minimize ground bounce during multi-channel switching |
| A/B | Multiplexer Control Input | Logic-high selects INAx; logic-low selects INBx - enables real-time gamma curve switching |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale gamma voltage delivery from 0 V to VCC without headroom loss |
| 380 mA output current | Drives high-capacitance LCD column driver inputs without external buffering |
| Stable with 1 nF loads | Eliminates need for output RC filtering - preserves gamma step fidelity |
| Low 2–50 nA input bias current | Permits use of megaohm-level gamma resistor ladders, reducing system supply current |
| Automotive-qualified temp range | Validated operation from −40°C to +105°C meets AEC-Q100 stress test requirements |
Applications
| Car Navigation Panels | Personal Media Player Panels |
|---|---|
Use Scenario: High-resolution TFT-LCD in vehicle-mounted GPS units requiring consistent grayscale across wide ambient temperatures. IC Role / Device Role / Timing Role: Gamma reference buffer delivering stable, muxed positive/negative inversion voltages to column drivers. Use Value: Maintains color accuracy and contrast uniformity despite engine bay thermal cycling and solar loading. |
Use Scenario: Portable video players with active-matrix LCDs powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current gamma buffer enabling dual-curve selection for adaptive brightness modes. Use Value: Extends battery life while preserving visual fidelity during video playback under varying lighting conditions. |
| Automotive Infotainment Systems | Industrial HMI Displays |
Use Scenario: Central touchscreen displays in modern vehicles integrating media, climate, and vehicle settings. IC Role / Device Role / Timing Role: 5-channel gamma reference buffer supporting line-inversion timing synchronized with display controller frame rate. Use Value: Reduces flicker and improves motion clarity by ensuring precise, low-noise gamma voltage settling before column sampling. |
Use Scenario: Factory-floor operator interfaces exposed to vibration, EMI, and extended temperature cycles. IC Role / Device Role / Timing Role: Robust gamma voltage conditioner with high ESD immunity (3.5 kV HBM) and thermal margin. Use Value: Guarantees long-term display calibration stability without field recalibration or gamma drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD gamma buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADD8504WRUZ | 4-channel version; lower supply current (3.8 mA typ); 16-pin TSSOP | Reduced channel count limits support to smaller-panel gamma ladders | Choose when panel resolution requires only four gamma reference outputs and board space is constrained |
| ADD8506WRUZ | 6-channel version; higher supply current (5.1 mA typ); 24-pin TSSOP | Supports larger LCDs with extended gamma voltage granularity | Choose for QHD+ automotive displays or industrial panels requiring six independent gamma segments |
Compared with ADD8504WRUZ and ADD8506WRUZ, the ADD8505WRUZ provides optimal channel density for mid-size automotive displays (e.g., 7″–10″ navigation screens), balancing PCB footprint, thermal dissipation, and gamma ladder complexity without over-provisioning or under-serving.
Availability
ADD8505WRUZ is available at Aetrix Electronics and suitable for automotive infotainment systems, car navigation panels, and industrial HMI displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADD8505WRUZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADD8505WRUZ belongs to the ADD850x family of LCD gamma reference buffers, engineered specifically for line-inversion LCD biasing in automotive and portable display systems where accuracy, thermal resilience, and low-power operation are critical.
FAQ
What is the primary function of the ADD8505WRUZ in an LCD system?
The ADD8505WRUZ serves as a 5-channel gamma reference buffer that drives column driver inputs in line-inversion LCD panels. It accepts two sets of gamma reference voltages (via INA1–INA5 and INB1–INB5), selects between them using the A/B control pin, and delivers high-current, rail-to-rail buffered outputs (OUT1–OUT5) to maintain accurate grayscale reproduction. This functionality is essential for minimizing visual artifacts in automotive and portable displays.
Does the ADD8505WRUZ support automotive-grade temperature operation?
Yes, the ADD8505WRUZ is specified for operation from −40°C to +105°C and is qualified for automotive applications. Its electrical characteristics - including offset voltage, output drive, and supply current - are guaranteed across this full range, making it suitable for dashboard-mounted and center-stack infotainment displays without derating.
How does the A/B pin control gamma curve selection in the ADD8505WRUZ?
The A/B pin on the ADD8505WRUZ is a logic-level input that determines which of the two input pairs drives each output channel: logic high selects INA1–INA5 (positive inversion gamma), and logic low selects INB1–INB5 (negative inversion gamma). This allows real-time switching between complementary gamma curves synchronized to the display's line inversion timing, reducing DC imbalance and improving image stability.
What package type and dimensions does the ADD8505WRUZ use?
The ADD8505WRUZ uses a 20-lead Pb-free thin shrink small outline package (TSSOP-20, RU-20) compliant with JEDEC MO-153-AC. Its footprint measures 6.5 mm × 4.4 mm with 0.65 mm lead pitch and 1.2 mm maximum height, optimized for high-density SMT assembly in space-constrained display modules.
Can the ADD8505WRUZ drive large gamma resistor ladders without external components?
Yes, the ADD8505WRUZ is designed to directly drive high-impedance gamma resistor ladders due to its ultra-low input bias current (2–50 nA typical) and high output current (380 mA short-circuit). Its stability with 1 nF capacitive loads eliminates the need for series resistors or RC filters, preserving gamma voltage step integrity and simplifying layout.
ADD8505WRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- TFT-LCD Panels: Gamma Buffer
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 5
- -3db Bandwidth:
- -
- Slew Rate:
- 7V/µs
- Current - Supply:
- 3 mA
- Current - Output / Channel:
- 380 mA
- Voltage - Supply, Single/Dual (±):
- 3.3V ~ 6.5V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
ADD8505WRUZ FAQ
1.How can I place an order for ADD8505WRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADD8505WRUZ 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 ADD8505WRUZ reliable?
The price and inventory of ADD8505WRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADD8505WRUZ is usually 5 days.
3.What payment methods are accepted for ADD8505WRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADD8505WRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADD8505WRUZ?
ADD8505WRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADD8505WRUZ 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 ADD8505WRUZ?
For technical support, including ADD8505WRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADD8505WRUZ requirements.
6.How does Aetrix verify that ADD8505WRUZ is sourced from the original manufacturer or authorized distributors?
All ADD8505WRUZ 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 ADD8505WRUZ meets industry standards.
7.What is the process for return or replacement of ADD8505WRUZ?
All ADD8505WRUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADD8505WRUZ, 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 ADD8505WRUZ part is unused and in its original packaging.
Return procedure for ADD8505WRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADD8505WRUZ Tags
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LT6552CS8#PBF
Analog Devices Inc.
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LT6205IS5#TRPBF
Analog Devices Inc.
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LT6206IMS8#TRPBF
Analog Devices Inc.
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LT6552CDD#PBF
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LT6552IS8#PBF
Analog Devices Inc.
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LT1252CS8#PBF
Analog Devices Inc.
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AD818ARZ-REEL7
Analog Devices Inc.
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MAX4310EUA+
Analog Devices Inc./Maxim Integrated
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AD829ARZ
Analog Devices Inc.
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AD810ARZ
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MAX4310ESA+
Analog Devices Inc./Maxim Integrated
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MAX4313ESA+
Analog Devices Inc./Maxim Integrated
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