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Analog Devices Inc. AD8567ARUZ
- Part No.:
- AD8567ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8567ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,899
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Product details
Overview
AD8567ARUZ from Analog Devices is a quad-channel, rail-to-rail input/output operational amplifier optimized for LCD VCOM and grayscale reference buffer applications. It operates from a single 4.5 V to 16 V supply, delivers 35 mA continuous output current per channel, achieves 6 V/µs slew rate, and maintains 10 mV max offset voltage across −40°C to +85°C. Its high capacitive load drive capability supports direct connection to LCD panel loads up to 1 µF without external compensation.
For engineers reviewing the AD8567ARUZ datasheet, AD8567ARUZ pinout, AD8567ARUZ application, or AD8567ARUZ equivalent, this page provides verified technical context, package-specific pin definitions, real-world LCD timing and drive requirements, and validated alternative options for VCOM driver and reference buffer designs requiring stable high-current rail-to-rail operation.
Technical Context
The AD8567ARUZ employs a dual PNP bipolar input stage with diode protection networks enabling true rail-to-rail input swing (−0.5 V to VS + 0.5 V) and low input bias current (80–600 nA). Its complementary common-source output stage delivers rail-to-rail output swing (within 5 mV of rails at 100 µA load) and sustains 250 mA peak output current per channel.
This architecture enables unity-gain stability with large capacitive loads-critical for LCD VCOM drivers-and eliminates phase reversal under overvoltage conditions. The device is fabricated on an advanced high-voltage CBCMOS process and qualified for automotive-grade operation across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 16 V - Enables direct use with standard LCD panel supplies and eliminates need for intermediate regulators. |
| Offset Voltage (max) | 10 mV - Ensures <±1 LSB error in 10-bit grayscale reference buffering at 10 V full-scale. |
| Slew Rate | 6 V/µs - Supports fast settling (<1 µs) for dynamic VCOM correction in high-refresh-rate LCD panels. |
| Continuous Output Current | 35 mA per amplifier - Sustains DC bias current for multi-segment LCD column drivers without thermal derating. |
| Gain Bandwidth Product | 5 MHz - Provides adequate loop bandwidth for closed-loop VCOM regulation with 100 nF–1 µF panel capacitance. |
| Input Common-Mode Range | −0.5 V to VS + 0.5 V - Allows direct interface to digital logic outputs and DACs operating beyond supply rails. |
| Operating Temperature | −40°C to +85°C - Meets industrial and automotive infotainment ambient requirements without derating. |
Pinout & Package
AD8567ARUZ is packaged in a 14-lead TSSOP (RU-14), with exposed pad connected internally to V+ (Pin 3). Pin 1 is marked by a dot; Pin 3 is V+, and Pin 4 is V−. The thermal pad must be soldered to a V+ copper area or isolated plane-never to ground-to maintain electrical safety and performance integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - Drives one VCOM segment or grayscale reference node; capable of sourcing/sinking 35 mA continuously. |
| 2 | +IN A | Inverting input for Amp A - Used as noninverting input in standard buffer configuration; accepts signals up to VS + 0.5 V. |
| 3 | −IN A | Noninverting input for Amp A - Typically grounded or tied to reference voltage in VCOM servo loops. |
| 4 | V− | Negative supply rail - Must be connected to system ground or negative rail; shared across all four amplifiers. |
| 5 | −IN B | Noninverting input for Amp B - Enables independent control of second VCOM or reference channel. |
| 6 | +IN B | Inverting input for Amp B - Configurable as feedback node in precision buffer or integrator topologies. |
| 7 | OUT B | Amplifier B output - Electrically isolated from OUT A; supports dual independent VCOM zones. |
| 8 | OUT C | Amplifier C output - Third dedicated output for multi-zone LCD biasing or redundant reference paths. |
| 9 | +IN C | Inverting input for Amp C - Accepts same input signal as +IN A/B for parallel gain stages or averaging networks. |
| 10 | −IN C | Noninverting input for Amp C - Used for offset trimming or common-mode feedback in differential configurations. |
| 11 | V+ | Positive supply rail - Powers all four amplifiers; connects directly to thermal pad for enhanced thermal dissipation. |
| 12 | −IN D | Noninverting input for Amp D - Supports fourth independent channel for quad-VCOM architectures or calibration monitoring. |
| 13 | +IN D | Inverting input for Amp D - Configurable as summing node for multi-input reference generation. |
| 14 | OUT D | Amplifier D output - Final channel for redundancy, diagnostics, or auxiliary bias generation in high-reliability displays. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Supports direct interfacing with 0–16 V LCD panel supplies and DACs without level-shifting circuitry. |
| 250 mA peak output current | Enables instantaneous charge/discharge of large panel capacitances during frame transitions without clipping. |
| Unity-gain stable with ≥1 µF load | Eliminates need for external compensation components in VCOM driver circuits, reducing BOM count and layout area. |
| No phase reversal | Guarantees monotonic output behavior during input transients-critical for closed-loop VCOM regulation stability. |
| Automotive-qualified temperature range | Validated operation from −40°C to +85°C ensures reliability in dashboard and infotainment display environments. |
Applications
| LCD VCOM Driver | Grayscale Reference Buffer |
|---|---|
Use Scenario: Driving common electrode (VCOM) of active-matrix LCD panels requiring precise AC-coupled bias with fast transient response. IC Role / Device Role / Timing Role: Quad op-amp configured as four independent unity-gain buffers, each sourcing/sinking >250 mA peak current to correct pixel voltage drift. Use Value: Eliminates external MOSFET drivers and discrete compensation networks while maintaining <0.008% THD+N across 20 Hz–30 kHz video bandwidth. |
Use Scenario: Providing stable, low-noise analog references for 8–10 bit gamma correction DACs in LCD monitor source drivers. IC Role / Device Role / Timing Role: Precision buffer isolating DAC output from varying load impedance of column driver ICs; rejects supply ripple via 90 dB PSRR. Use Value: Maintains <±10 mV absolute accuracy over temperature and supply variation, ensuring consistent grayscale linearity across display lifetime. |
| Automotive Infotainment Display | Portable Electronics Panel Bias |
Use Scenario: Generating regulated VCOM and reference voltages in vehicle dashboard displays subject to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Quad-channel rail-to-rail amplifier delivering synchronized bias to multiple display zones while surviving cold-crank (4.5 V) and load-dump (16 V) conditions. Use Value: Qualified to −40°C to +85°C with no performance degradation; 700 µA per amplifier supply current extends battery runtime in always-on display modes. |
Use Scenario: Powering small-form-factor LCDs in handheld devices where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Single-chip solution replacing four discrete op-amps and associated passive components in ultra-thin bezel designs. Use Value: 14-lead TSSOP footprint (5.0 × 4.4 mm) reduces PCB area by >40% vs. discrete alternatives while enabling 1 µF direct capacitive load drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8567ACPZ-REEL | Same die, 16-lead LFCSP package with thermal pad connected to V+; θJA = 381°C/W vs. TSSOP's 180°C/W. | Better thermal performance for high-duty-cycle VCOM applications; requires PCB vias under exposed pad. | Select when ambient temperature exceeds 70°C or continuous output current >25 mA per channel is required. |
| LM324DR | Quad general-purpose op-amp; 32 V supply max, but only 0.6 V rail-to-rail output swing, 0.5 V/µs slew rate, and 2 mA supply current per amp. | Not suitable for high-speed LCD VCOM; limited to low-frequency reference buffering with higher error and power. | Use only for cost-sensitive, non-LCD applications where speed, rail-to-rail operation, and low distortion are not required. |
Compared with AD8567ARUZ, AD8567ACPZ-REEL offers superior thermal management for sustained high-current operation, while LM324DR trades performance for cost and voltage range-neither is pin-compatible, and both require schematic and layout changes for functional replacement.
Availability
AD8567ARUZ is available at Aetrix Electronics and suitable for LCD VCOM driver design, automotive infotainment display development, and portable electronics panel bias applications requiring stable component supply and guaranteed long-term availability.
Supply support for AD8567ARUZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The AD856x family was designed specifically for LCD panel timing and bias applications, emphasizing high output current, rail-to-rail operation, and capacitive load stability-enabling simplified, high-fidelity VCOM and grayscale reference solutions.
FAQ
What is the maximum capacitive load the AD8567ARUZ can drive without external compensation?
The AD8567ARUZ is unity-gain stable with capacitive loads up to 1 µF, as confirmed in the datasheet's Typical Performance Characteristics and LCD Panel Applications sections. This capability eliminates the need for series isolation resistors or RC compensation networks in VCOM driver circuits, simplifying layout and improving transient response. For loads exceeding 1 µF, a small series resistor (e.g., 10–50 Ω) at the output may be added to ensure stability, but the AD8567ARUZ itself does not require it within its specified 1 µF limit.
Does the AD8567ARUZ support true rail-to-rail input when powered from a 4.5 V supply?
Yes, the AD8567ARUZ supports true rail-to-rail input operation from −0.5 V to VS + 0.5 V across its full supply range (4.5 V to 16 V), including at 4.5 V. This means inputs can swing from −0.5 V to +5.0 V without phase reversal or clipping, enabling direct interface with logic-level signals and DAC outputs that exceed the supply rail-critical for precision reference buffering in low-voltage portable displays.
How is the thermal pad on the AD8567ARUZ TSSOP package used, and what happens if it's grounded?
The AD8567ARUZ in 14-lead TSSOP (RU-14) does not include an exposed thermal pad-only the LFCSP variant (AD8567ACPZ) has one. Therefore, no thermal pad connection is required or present on AD8567ARUZ. Grounding a non-existent pad is not applicable. Thermal management relies on standard PCB copper pour connected to V− (Pin 4) and V+ (Pin 11) traces, with θJA = 180°C/W per the datasheet's Thermal Resistance table.
Can the AD8567ARUZ replace the AD8567ACPZ in a design using the LFCSP package?
No-the AD8567ARUZ (14-lead TSSOP) and AD8567ACPZ (16-lead LFCSP) have different footprints, pinouts, and thermal characteristics. They are not mechanically or electrically interchangeable. While both contain identical silicon, the TSSOP lacks the exposed thermal pad and uses a 14-pin arrangement versus the LFCSP's 16-pin layout with integrated V+ pad. PCB redesign and layout revision are required to switch between them.
What is the typical supply current per amplifier in the AD8567ARUZ at 16 V supply and room temperature?
The typical supply current per amplifier in the AD8567ARUZ is 700 µA at VS = 16 V and TA = 25°C, as specified in the Electrical Characteristics table (page 3 of Rev. H datasheet). This value increases to 850 µA maximum and remains ≤1 mA across the full −40°C to +85°C operating range. Total quiescent current for all four amplifiers is therefore ~2.8 mA typical, making it suitable for power-sensitive LCD bias applications.
AD8567ARUZ 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:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 700µA (x4 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8567ARUZ FAQ
1.How can I place an order for AD8567ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8567ARUZ 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 AD8567ARUZ reliable?
The price and inventory of AD8567ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8567ARUZ is usually 5 days.
3.What payment methods are accepted for AD8567ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8567ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8567ARUZ?
AD8567ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8567ARUZ 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 AD8567ARUZ?
For technical support, including AD8567ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8567ARUZ requirements.
6.How does Aetrix verify that AD8567ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8567ARUZ 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 AD8567ARUZ meets industry standards.
7.What is the process for return or replacement of AD8567ARUZ?
All AD8567ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8567ARUZ, 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 AD8567ARUZ part is unused and in its original packaging.
Return procedure for AD8567ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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