Analog Devices Inc. ADD8702ACP-R2

Overview

ADD8702ACP-R2 from Analog Devices is a mask-programmable 12-channel gamma reference generator with integrated adjustable VCOM buffer, designed for TFT LCD panel gamma correction and common electrode driving. It delivers 12 precision gamma voltage outputs (VGMA1–VGMA12), ±0.3% resistor string accuracy, 10 mA continuous output per channel, 250 mA peak VCOM current, and operates from 7 V to 16 V single supply.

For engineers reviewing the ADD8702ACP-R2 datasheet, ADD8702ACP-R2 pinout, ADD8702ACP-R2 application, or ADD8702ACP-R2 equivalent, this device supports high-resolution SVGA/XGA panels (e.g., 1024×768), requires no external resistor ladder, enables fast prototyping via ADD8701 pin compatibility, and targets cost-sensitive, space-constrained LCD timing controller designs.

Technical Context

The ADD8702ACP-R2 integrates a 500-element on-chip resistor string for mask-programmed gamma voltage generation across 12 buffered outputs, with independent upper/lower rail swing capability: VGMA11–VGMA12 swing to VDD, VGMA1–VGMA2 swing to GND. Its VCOM buffer features rail-to-rail stability under 1000 pF capacitive load and supports external trim via VCOM ADJ pin.

It uses a single-supply architecture (7 V–16 V) with 15 mA max supply current, achieves 0.8 µs VCOM settling time (1 V step, 0.1%, RL = 10 kΩ, CL = 200 pF), and maintains ±50 mV output accuracy over temperature (–40°C to +85°C) without calibration.

Key Specifications

Pinout & Package

ADD8702ACP-R2 is housed in a 32-lead Lead Frame Chip Scale Package (LFCSP, CP-32), measuring 5.00 mm × 5.00 mm × 0.80 mm, JEDEC MO-220-VHHD-2 compliant, with exposed thermal pad for enhanced thermal performance in compact LCD timing modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gamma reference and VCOM driver applications.

Compared with ADD8702ACP-R2, ADD8701ACP-R2 trades mask-programmed precision for configurability, while TPS65105RGER consolidates power and timing functions at the expense of gamma channel count and VCOM drive strength-making ADD8702ACP-R2 optimal for high-resolution, cost-sensitive, fixed-gamma TFT modules.

Availability

ADD8702ACP-R2 is available at Aetrix Electronics and suitable for TFT LCD panel manufacturing, industrial HMI display modules, and embedded medical imaging systems requiring stable component supply and long-term lifecycle support.

Supply support for ADD8702ACP-R2 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 with precision data conversion and power management solutions.

The ADD8702ACP-R2 belongs to Analog Devices' display interface and timing IC product line, engineered specifically to replace discrete gamma resistor networks and simplify TFT LCD panel reference design with integrated, mask-configurable voltage generation.

FAQ

What is the primary function of the ADD8702ACP-R2 in an LCD system?

The ADD8702ACP-R2 serves as a 12-channel gamma reference generator and integrated VCOM driver for TFT LCD panels. It replaces external resistor ladders and discrete op-amps by delivering precisely programmed gamma voltages (VGMA1–VGMA12) and a high-current VCOM output. In every LCD timing chain, the ADD8702ACP-R2 ensures grayscale fidelity and panel uniformity while reducing component count and board space.

Does the ADD8702ACP-R2 require external programming hardware or firmware?

No, the ADD8702ACP-R2 is mask-programmable during wafer fabrication-no external programming hardware, firmware, or I²C/SPI interface is needed. Gamma tap points and VCOM reference are permanently set at manufacture using the 500-element on-chip resistor string. The ADD8702ACP-R2 operates immediately upon power-up with zero configuration overhead, making it ideal for high-volume, cost-sensitive display modules.

Can the ADD8702ACP-R2 drive large-panel VCOM loads without external components?

Yes, the ADD8702ACP-R2 VCOM buffer is specified to drive up to 1000 pF pure capacitive load with stable 0.8 µs settling time and no external compensation required. Its 250 mA peak output current supports large-format panels (e.g., 1024×768 and above), and its rail-to-rail output stage maintains accuracy even under heavy transient load conditions typical in AC-driven LCDs.

How does the ADD8702ACP-R2 differ from the ADD8701ACP-R2?

The ADD8702ACP-R2 integrates a mask-programmable 500-element resistor string for factory-configured gamma voltages, eliminating external resistors. The ADD8701ACP-R2 lacks this string and requires external ladder networks. Both share identical pinout, VCOM specs, and package-so the ADD8702ACP-R2 enables direct PCB replacement for improved cost, size, and performance without layout changes.

What is the operating temperature range and package type of the ADD8702ACP-R2?

The ADD8702ACP-R2 is rated for –40°C to +85°C operation and packaged in a 32-lead LFCSP (CP-32), measuring 5.00 mm × 5.00 mm × 0.80 mm with JEDEC MO-220-VHHD-2 compliance. Its exposed thermal pad and low-profile form factor support high-density placement in space-constrained LCD timing modules and industrial display controllers.