Analog Devices Inc. ADA4431-1YCPZ-R2

Overview

ADA4431-1YCPZ-R2 from Analog Devices is an ultralow-power SD video reconstruction filter with integrated load detection, third-order low-pass filtering (6 MHz 1 dB flatness), rail-to-rail output, and on-chip charge pump for dc-coupled video output. It operates from 2.5 V to 3.6 V, draws only 4.7 mA quiescent current in active mode, and supports portable video applications requiring automatic power-down when no video load is present.

For engineers reviewing the ADA4431-1YCPZ-R2 datasheet, ADA4431-1YCPZ-R2 pinout, ADA4431-1YCPZ-R2 application, or ADA4431-1YCPZ-R2 equivalent, key selection considerations include load-detect autonomy, SAG correction capability for ac-coupled outputs, −3 dB bandwidth (6.6–9.1 MHz), differential gain (0.7%), and 16-lead 3 mm × 3 mm LFCSP package compatibility with space-constrained handheld designs.

Technical Context

The ADA4431-1YCPZ-R2 integrates a third-order video low-pass filter with programmable gain (G = 2 or G ≈ 2.5 with SAG), a charge pump generating a virtual negative supply for true dc-coupled output (sync tip at −300 mV), and autonomous load detection using FB1/FB2 feedback pins across a 75 Ω termination resistor. Its disable pin (DIS) controls three states: high (charge pump enabled), floating (charge pump disabled), and low (full shutdown).

It features rail-to-rail output driving capability (40 mA linear current), input-to-output isolation of 89 dB at 1 MHz in disabled state, and dual operating modes: charge pump on (output range −0.8 V to +2.8 V) or off (0 V to +2.8 V). SAG correction reduces required ac-coupling capacitor size by enabling low-frequency gain boost while maintaining flat passband response.

Key Specifications

Pinout & Package

ADA4431-1YCPZ-R2 is housed in a 16-lead Lead Frame Chip Scale Package (LFCSP_UQ), CP-16-12, with exposed pad thermally connected to PCB ground plane. Package dimensions: 3.00 mm × 3.00 mm body, 0.55 mm max height, JEDEC MO-248-UEED compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SD video filter applications.

Compared with MAX4392ESE+ and LMH0394SQ/NOPB, the ADA4431-1YCPZ-R2 uniquely combines ultralow power (4.7 mA), integrated load detection, and on-chip charge pump in a 3 mm × 3 mm package-making it the only viable option for space- and battery-constrained portable SD video systems requiring zero-external-component dc coupling.

Availability

ADA4431-1YCPZ-R2 is available at Aetrix Electronics and suitable for portable media players, cell phones, and digital still cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADA4431-1YCPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and consumer markets.

The ADA4431-1YCPZ-R2 belongs to Analog Devices' portable video interface product line, engineered specifically for ultralow-power SD video signal conditioning in battery-operated handheld devices with strict size and thermal constraints.

FAQ

What is the primary function of the ADA4431-1YCPZ-R2 in a video signal chain?

The ADA4431-1YCPZ-R2 serves as a fully integrated SD video reconstruction filter and driver. It performs third-order low-pass filtering (6 MHz 1 dB flatness), provides rail-to-rail buffered output capable of driving dual 75 Ω loads, implements autonomous load detection to reduce power when no video load is present, and incorporates an on-chip charge pump for dc-coupled output. This makes ADA4431-1YCPZ-R2 ideal for portable devices where power, size, and signal fidelity are critical.

How does the load detection feature of the ADA4431-1YCPZ-R2 operate without external components?

The ADA4431-1YCPZ-R2 uses its FB1 and FB2 pins to monitor voltage drop across an external 75 Ω series termination resistor placed between the OUT pin and the video load. When a 75 Ω load is connected, current flow creates a measurable voltage difference that the internal circuitry detects autonomously. The LDO pin then asserts high to indicate load presence. No microcontroller polling or external comparators are needed - ADA4431-1YCPZ-R2 manages this entirely internally.

Can the ADA4431-1YCPZ-R2 be used with ac-coupled video outputs, and what advantage does SAG correction provide?

Yes, the ADA4431-1YCPZ-R2 supports both dc-coupled (with charge pump enabled) and ac-coupled outputs (with charge pump disabled). When used ac-coupled, its SAG correction feature compensates for low-frequency droop caused by series coupling capacitors. By connecting external capacitors to CAP1–CAP4 and routing SAG to OUT, ADA4431-1YCPZ-R2 boosts low-frequency gain, allowing use of smaller 22 µF/47 µF ceramics instead of bulky 220 µF electrolytics - reducing board area and improving reliability.

What are the supply voltage requirements and power consumption modes of the ADA4431-1YCPZ-R2?

The ADA4431-1YCPZ-R2 operates from a single 2.5 V to 3.6 V supply. It offers three distinct power modes: normal active mode (4.7 mA typical with load present and charge pump on), load-search mode (0.1 mA when no load is detected but monitoring continues), and disabled mode (24 µA when DIS pin is pulled low). These modes are controlled solely by the DIS pin voltage level - high, floating, or low - enabling flexible system-level power management without firmware intervention.

Is the ADA4431-1YCPZ-R2 pin-compatible with other members of the ADA4431 family, such as the ADA4431-0?

No, the ADA4431-1YCPZ-R2 is not pin-compatible with the ADA4431-0. While both share the same 16-lead LFCSP package and core architecture, the ADA4431-0 lacks load detection, SAG correction, and the LDO/FB1/FB2 pins. Pin functions differ significantly - for example, pins 4 (LDO), 13 (SAG), 15 (FB2), and 16 (FB1) are unique to ADA4431-1YCPZ-R2 and have no counterpart on ADA4431-0. PCB layout and firmware must be redesigned to migrate from ADA4431-0 to ADA4431-1YCPZ-R2.