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Analog Devices Inc. ADD8505WRUZ-REEL7
- Part No.:
- ADD8505WRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADD8505WRUZ-REEL7.pdf
- Description:
- IC AMP TFT-LCD 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:16,951
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Product details
Overview
ADD8505WRUZ-REEL7 from Analog Devices is a 5-channel muxed-input LCD gamma reference buffer designed to drive column driver resistor ladders in line-inversion automotive LCD panels. It features rail-to-rail input/output, 380 mA short-circuit output current, 3.9 mA supply current at 5 V, and operates from 3.3 V to 6.5 V across −40°C to +105°C. Used in car navigation displays for precise gamma voltage switching between positive/negative inversion curves.
For engineers reviewing the ADD8505WRUZ-REEL7 datasheet, ADD8505WRUZ-REEL7 pinout, ADD8505WRUZ-REEL7 application, or ADD8505WRUZ-REEL7 equivalent, this device is selected for high-current, temperature-stable gamma reference buffering in automotive infotainment display systems where A/B input selection, low offset (20 mV typ), and 6.2 V/μs slew rate under 250 Ω load are critical design requirements.
Technical Context
The ADD8505WRUZ-REEL7 implements five independent CMOS buffer channels, each with dual analog inputs (INAx/INBx) and a single digital A/B select control that routes either input to the output. Its architecture supports simultaneous gamma curve switching across all channels using one shared logic signal.
It delivers rail-to-rail output swing into resistive or capacitive loads up to 1 nF, with 120 mA minimum output current per channel and 6 μs settling time (CL = 200 pF, RL = 10 kΩ). Power distribution uses separate VCC1/VCC2 and dual GND pins to manage peak current transients during gamma updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent gamma reference buffers with A/B input multiplexing |
| Supply Voltage | 3.3 V to 6.5 V - enables direct interface with 5 V automotive power rails without regulation |
| Output Current | 380 mA short-circuit - ensures stable driving of low-impedance gamma resistor ladders |
| Offset Voltage | 20 mV max - minimizes gray-scale distortion in high-resolution LCD panels |
| Slew Rate | 6.2 V/μs at RL = 250 Ω - supports fast gamma updates during dynamic screen content changes |
| Operating Temp | −40°C to +105°C - qualified for under-hood and dashboard-mounted automotive display modules |
| Package | 20-lead Pb-free TSSOP (RU-20) - surface-mount compatible with automated SMT assembly |
Pinout & Package
ADD8505WRUZ-REEL7 is housed in a 20-lead thin shrink small outline package (TSSOP, RU-20), 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, with exposed pad not present. Pin 1 marked via notch or dot; pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA5 | Buffer Input A | Positive gamma curve reference input for Channels 1–5 |
| INB1–INB5 | Buffer Input B | Negative gamma curve reference input for Channels 1–5 |
| OUT1–OUT5 | Buffer Output | Driven gamma reference output connected to column driver ladder tap points |
| VCC1, VCC2 | Power Supply | Dual supply pins - must be shorted externally and bypassed to reduce noise coupling |
| GND (Pins 13, 14) | Ground | Dual ground connections - required for low-impedance return path during high-current switching |
| A/B | Logic Control Input | CMOS-compatible select signal: HIGH → INAx, LOW → INBx for all channels simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale gamma voltage delivery without headroom loss, preserving contrast ratio |
| 380 mA short-circuit output | Guarantees stable operation into low-resistance gamma ladders (<1 kΩ) without droop |
| Stable with 1 nF load | Eliminates need for external isolation resistors - preserves signal integrity into capacitive column drivers |
| Low 3.9 mA supply current | Reduces thermal load in sealed display enclosures and extends system-level power budget |
| Automotive temperature range | Validated operation from −40°C to +105°C meets AEC-Q100 Grade 3 requirements |
Applications
| Car Navigation Panels | Personal Media Player Panels |
|---|---|
Use Scenario: High-brightness TFT-LCD used in vehicle-mounted GPS units with sunlight-readable contrast. IC Role / Device Role / Timing Role: Gamma reference buffer providing switched positive/negative inversion voltages to column drivers. Use Value: Maintains consistent grayscale fidelity across wide ambient temperature swings and rapid UI transitions. |
Use Scenario: Portable media players requiring compact, low-power display gamma correction. IC Role / Device Role / Timing Role: Multiplexed gamma voltage source enabling dual-curve optimization for battery-saver and vivid modes. Use Value: Enables seamless gamma switching without visible flicker or color shift during mode transitions. |
| Automotive Infotainment Systems | Instrument Cluster Displays |
Use Scenario: Central touchscreen display integrating HVAC, audio, and vehicle settings in modern dashboards. IC Role / Device Role / Timing Role: 5-channel gamma buffer driving high-resolution RGB column drivers with synchronized A/B selection. Use Value: Delivers <6 μs settling time and 6.2 V/μs slew rate to support 60 Hz+ refresh rates without ghosting. |
Use Scenario: Digital instrument clusters with analog gauge emulation and warning indicators. IC Role / Device Role / Timing Role: Precision gamma reference generator maintaining color accuracy across speedometer, tachometer, and ADAS alerts. Use Value: 20 mV max offset and −40°C to +105°C operation ensure legibility and consistency in all driving conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD gamma reference buffering applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADD8504WRUZ-REEL7 | 4-channel version; lower supply current (3.8 mA typ); same RU-16 package footprint | Suitable for smaller displays with reduced gamma voltage count (e.g., rear-seat monitors) | Select when panel requires only four gamma reference outputs and board space is constrained |
| ADD8506WRUZ-REEL7 | 6-channel version; higher supply current (5.1 mA typ); RU-24 package with additional INA6/INB6 and VCC3 pins | Required for high-resolution automotive center stacks with six or more gamma taps per segment | Select when display architecture mandates six independent gamma reference outputs per channel group |
Compared with ADD8504WRUZ-REEL7 and ADD8506WRUZ-REEL7, the ADD8505WRUZ-REEL7 provides optimal channel count and power trade-off for mid-tier automotive displays-offering one more channel than the 4-channel variant while avoiding the larger RU-24 footprint and higher quiescent draw of the 6-channel option.
Availability
ADD8505WRUZ-REEL7 is available at Aetrix Electronics and suitable for car navigation panels, personal media player panels, and automotive infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADD8505WRUZ-REEL7 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-REEL7 belongs to the ADD850x family of LCD gamma reference buffers, engineered specifically for line-inversion automotive display systems demanding robustness, low offset, and high-output current in compact TSSOP packages.
FAQ
What is the function of the A/B pin on the ADD8505WRUZ-REEL7?
The A/B pin is a digital control input that selects between two gamma reference voltage sources per channel: logic HIGH routes INA1–INA5 to OUT1–OUT5, while logic LOW routes INB1–INB5. This enables real-time switching between positive and negative inversion gamma curves without external multiplexers, and is shared across all five channels for synchronized update. The ADD8505WRUZ-REEL7 requires no pull-up/down resistors on A/B - it accepts standard CMOS logic levels referenced to VCC.
Does the ADD8505WRUZ-REEL7 require external compensation components?
No, the ADD8505WRUZ-REEL7 is internally compensated and stable with capacitive loads up to 1 nF without external components. Its design eliminates the need for series isolation resistors at the outputs - a key advantage over older gamma buffers - allowing direct connection to column driver inputs. However, proper PCB layout with local 0.1 μF ceramic bypass capacitors between each VCC pin and its adjacent GND pin remains mandatory to maintain stability under transient load conditions.
What is the maximum load capacitance the ADD8505WRUZ-REEL7 can drive while maintaining specified settling time?
The ADD8505WRUZ-REEL7 maintains its specified 2.5–6 μs settling time (to 0.1%) with a 200 pF load capacitance and 10 kΩ resistive load, per the Electrical Characteristics table. While the device remains stable up to 1 nF, settling time increases beyond 200 pF - e.g., ~12 μs at 1 nF/10 kΩ. For applications requiring sub-10 μs response, keep total node capacitance ≤330 pF, including PCB trace and column driver input capacitance. The ADD8505WRUZ-REEL7's 7.0 V/μs slew rate (CL = 15 pF) supports this performance envelope.
Is the ADD8505WRUZ-REEL7 pin-compatible with other devices in the ADD850x family?
No, the ADD8505WRUZ-REEL7 is not pin-compatible with ADD8504WRUZ-REEL7 or ADD8506WRUZ-REEL7. It uses a 20-lead TSSOP (RU-20) package, whereas ADD8504 uses 16-lead (RU-16) and ADD8506 uses 24-lead (RU-24). Pin counts, spacing, and functions differ: ADD8505WRUZ-REEL7 has dedicated VCC1/VCC2 and dual GND pins, but lacks the third supply (VCC3) and extra input/output pairs found in ADD8506WRUZ-REEL7. Board redesign is required for substitution.
What automotive qualification does the ADD8505WRUZ-REEL7 meet?
The ADD8505WRUZ-REEL7 is qualified for automotive applications per the manufacturer's stated specification: it is rated for −40°C to +105°C operation and listed in the Automotive Ordering Guide section of the datasheet. While it shares the same temperature rating and packaging as the explicitly automotive-grade ADD8506WWARUZR7, the ADD8505WRUZ-REEL7 itself is not designated as AEC-Q100 qualified in official documentation. For safety-critical automotive use, designers should verify qualification status directly with Analog Devices or select the designated automotive model.
ADD8505WRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Bulk
- 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-REEL7 FAQ
1.How can I place an order for ADD8505WRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADD8505WRUZ-REEL7 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-REEL7 reliable?
The price and inventory of ADD8505WRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADD8505WRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADD8505WRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADD8505WRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADD8505WRUZ-REEL7?
ADD8505WRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADD8505WRUZ-REEL7 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-REEL7?
For technical support, including ADD8505WRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADD8505WRUZ-REEL7 requirements.
6.How does Aetrix verify that ADD8505WRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADD8505WRUZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of ADD8505WRUZ-REEL7?
All ADD8505WRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADD8505WRUZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for ADD8505WRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADD8505WRUZ-REEL7 Tags
-
LT6552CS8#PBF
Analog Devices Inc.
-
LT6205IS5#TRPBF
Analog Devices Inc.
-
LT6206IMS8#TRPBF
Analog Devices Inc.
-
LT6552CDD#PBF
Analog Devices Inc.
-
LT6552IS8#PBF
Analog Devices Inc.
-
LT1252CS8#PBF
Analog Devices Inc.
-
AD818ARZ-REEL7
Analog Devices Inc.
-
MAX4310EUA+
Analog Devices Inc./Maxim Integrated
-
AD829ARZ
Analog Devices Inc.
-
AD810ARZ
Analog Devices Inc.
-
MAX4310ESA+
Analog Devices Inc./Maxim Integrated
-
MAX4313ESA+
Analog Devices Inc./Maxim Integrated
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