Renesas EL5825ILZ-T7

Overview

EL5825ILZ-T7 from Intersil is an 8-channel programmable TFT-LCD reference voltage generator with 10-bit resolution, ±0.1% accuracy, rail-to-rail output swing (within 100 mV of rails), and serial interface control. It operates from 4.5 V to 16.5 V analog supply and 3.3 V to 5 V digital supply, delivering stable gamma correction voltages for LCD panel drive circuits.

For engineers reviewing the EL5825ILZ-T7 datasheet, EL5825ILZ-T7 pinout, EL5825ILZ-T7 application, or EL5825ILZ-T7 equivalent, this device supports daisy-chained multi-chip configurations, internal/external oscillator selection, and precise V/T curve tuning in display systems requiring fine-grained voltage referencing.

Technical Context

The EL5825ILZ-T7 implements a serial-programmable architecture with a 16-bit shift register, enabling channel selection (A–H) and 10-bit data loading via three-wire interface (SCLK, SDI, ENA). Its internal refresh clock runs at ~25 kHz and can be routed externally via the OSC pin for synchronized multi-device operation.

Each output features a rail-to-rail buffer capable of sourcing/sinking up to 30 mA, with load regulation of 0.5–1.5 mV/mA and droop voltage ≤2 mV/ms. Reference inputs (REFH/REFL) define the full-scale range, and the transfer function is strictly VOUT = VREFL + (data/1024) × (VREFH − VREFL).

Key Specifications

Pinout & Package

EL5825ILZ-T7 is housed in a 24-pin QFN package with exposed thermal pad (MDP0046), RoHS-compliant Pb-free + anneal finish, rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TFT-LCD reference voltage generator applications.

Compared with MAX5487ETL+ and AD5667RBRMZ-REEL7, the EL5825ILZ-T7 uniquely combines 8-channel rail-to-rail output, built-in oscillator, daisy-chain support, and dedicated REFH/REFL inputs-making it purpose-built for scalable, timing-critical TFT-LCD gamma systems.

Availability

EL5825ILZ-T7 is available at Aetrix Electronics and suitable for TFT-LCD manufacturing, display test equipment development, and industrial HMI design requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for EL5825ILZ-T7 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and mixed-signal semiconductor company focused on power management, precision analog, and interface solutions.

The EL5825ILZ-T7 belongs to Intersil's display interface product line, engineered specifically for high-accuracy, multi-channel gamma voltage generation in active-matrix LCD systems.

FAQ

What is the primary function of the EL5825ILZ-T7 in TFT-LCD systems?

The EL5825ILZ-T7 serves as an 8-channel programmable reference voltage generator that sets the gamma correction voltages for TFT-LCD panels. Each output is independently configurable with 10-bit resolution and ±0.1% accuracy, enabling precise shaping of the panel's V/T (voltage-to-transmission) curve to ensure consistent grayscale and color reproduction. Its rail-to-rail output swing and serial interface make it ideal for driving column driver DAC references in modern LCD timing controllers.

Does the EL5825ILZ-T7 support daisy-chaining with other EL5825 devices?

Yes, the EL5825ILZ-T7 supports daisy-chaining via its SDO (serial data out) pin, which buffers the internal 16-bit shift register output. When multiple EL5825ILZ-T7 units are connected SDO→SDI with shared ENA and SCLK lines, a single 16×N-bit serial stream updates all devices simultaneously. This eliminates the need for separate control lines per device and ensures synchronized gamma voltage updates across large-panel or dual-domain LCD architectures.

What are the key timing requirements for programming the EL5825ILZ-T7 via its serial interface?

The EL5825ILZ-T7 requires strict timing adherence: SCLK frequency up to 5 MHz, with minimum pulse width of 0.5×T, rise/fall time ≤5% of period, and setup/hold times ≥10 ns for SDI, ENA, and SCLK edges. Data is MSB-first; ENA must go low before SCLK starts, and the full 16-bit frame must complete before ENA returns high. The internal update occurs after ENA rises, with worst-case program-to-out delay of 4 ms - confirmed in the FN7005 datasheet Electrical Specifications table.

How does the EL5825ILZ-T7 achieve rail-to-rail output capability?

The EL5825ILZ-T7 achieves rail-to-rail output through dedicated output buffer stages designed to source and sink current up to 30 mA while maintaining voltage compliance within 100 mV of VS and GND. This is verified in the Electrical Specifications table under VOL (output swing low) and VOH (output swing high), measured at 5 mA load. The architecture uses complementary output transistors biased to minimize saturation voltage drop, enabling full utilization of the analog supply range for gamma voltage generation.

Is the EL5825ILZ-T7 RoHS-compliant and what packaging does it use?

Yes, the EL5825ILZ-T7 is RoHS-compliant and uses Intersil's Pb-free plus anneal process: 100% matte tin termination, lead-free molding compound, and die attach materials. It is packaged in a 24-pin QFN (MDP0046) with exposed thermal pad, rated for −40°C to +85°C operation. The "Z" suffix explicitly denotes the Pb-free variant, and "T7" indicates 7-inch tape-and-reel packaging - both confirmed in the Ordering Information table of the FN7005 datasheet.