Analog Devices Inc./Maxim Integrated MAX9502MELT+T

Overview

MAX9502MELT+T from Maxim Integrated is a +12dB fixed-gain, 2.5V–3.6V single-supply video amplifier with integrated 4th-order Chebyshev reconstruction filter, DC-coupled I/O, and active-low shutdown. It delivers 2.4VP-P into 150Ω at 3.0V supply, maintains 110mV sync-tip level, and supports NTSC/PAL composite video in portable imaging systems.

For engineers reviewing the MAX9502MELT+T datasheet, MAX9502MELT+T pinout, MAX9502MELT+T application, or MAX9502MELT+T equivalent, this page provides verified functional identity, validated μDFN-6 pin mapping, confirmed +12dB gain and 5.5MHz passband, and two field-validated alternative options for composite video amplification with reconstruction filtering.

Technical Context

The MAX9502MELT+T integrates a 4-pole Chebyshev lowpass filter (5.5MHz passband, 3dB attenuation at 8MHz, 55dB at 27MHz) and a rail-to-rail output buffer optimized for 75Ω video loads. Its DC-coupled architecture eliminates AC coupling capacitors and enables direct connection to current-output video DACs.

It features an active-low SHDN input that reduces quiescent current to 0.01μA, internal short-circuit protection (95mA trip, pulsed 12μs/0.8μs cycle), and operates across –40°C to +85°C with ±0.4% differential gain error and ±0.4° differential phase error under NTSC conditions.

Key Specifications

Pinout & Package

The MAX9502MELT+T is housed in a 6-pin μDFN package (1mm × 1.5mm × 0.8mm, wettable flank), optimized for space-constrained portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video amplifier with reconstruction filter applications.

Compared with MAX9502MELT+T, the MAX9502GELT+T offers lower gain but identical thermal and package specs, while the MAX9504EUT+T trades fixed sync-tip accuracy for programmable DC bias flexibility - both require layout changes and do not share pin compatibility.

Availability

MAX9502MELT+T is available at Aetrix Electronics and suitable for mobile phones, digital still cameras, portable video recorders, and security/CCTV systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX9502MELT+T 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

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for power, sensing, connectivity, and signal processing applications.

The MAX9502 product line targets low-voltage, space-constrained video signal chains in portable and embedded imaging systems, emphasizing integration of reconstruction filtering, DC-coupled amplification, and ultra-low-power shutdown.

FAQ

What is the exact gain setting of the MAX9502MELT+T?

The MAX9502MELT+T is factory-configured for a fixed closed-loop gain of +12dB, verified across its full operating temperature range (–40°C to +85°C) and supply voltage range (2.5V to 3.6V). This gain value is specified in the DC Electrical Characteristics table with a typical value of 12dB and min/max limits of 11.5dB to 12.5dB. The +12dB gain enables the MAX9502MELT+T to deliver up to 2.4VP-P into a 150Ω load when powered from a 3.0V supply, making it ideal for low-output video DACs.

Does the MAX9502MELT+T require external passive components for basic operation?

Yes - the MAX9502MELT+T requires a 0.1μF ceramic capacitor between VCC and GND for power supply bypassing, and a 75Ω series resistor between the OUT pin and the video cable to implement proper back-termination. No external reconstruction filter or AC-coupling capacitors are needed due to its integrated 4th-order Chebyshev filter and DC-coupled I/O architecture. These two external components are mandatory for stable operation and correct signal level shifting to the 110mV sync-tip reference.

What is the function of Pin 5 (N.C.) on the MAX9502MELT+T μDFN package?

Pin 5 on the MAX9502MELT+T μDFN package is designated N.C. (No Connection) and is internally unconnected. It must remain electrically floating - no trace, pad, or solder should be attached to this pin. Routing to or connecting this pin risks parasitic coupling or unintended current paths that could degrade PSRR or cause instability. The MAX9502MELT+T functions identically whether Pin 5 is left open or omitted from the PCB land pattern, as confirmed in the official Maxim Integrated package outline documentation.

Can the MAX9502MELT+T drive a 75Ω load directly without termination resistors?

No - the MAX9502MELT+T cannot drive a 75Ω load directly. Its output is designed as a current source requiring 75Ω series back-termination at the amplifier output and 75Ω parallel termination at the receiving end (e.g., monitor or DVR input). Without the 75Ω series resistor, the output sync-tip level shifts incorrectly, distortion increases, and the 110mV reference is lost. The datasheet specifies this configuration explicitly to maintain signal integrity, impedance matching, and proper DC level shifting for composite video standards.

What is the maximum allowable input voltage range for the MAX9502MELT+T at 3.0V supply?

At a 3.0V supply, the MAX9502MELT+T accepts an input voltage range of 0V to 0.6V for the +12dB gain variant, as guaranteed by DC voltage gain specifications. This range accommodates composite video signals with a sync tip up to 25mV and peak white level up to 0.6V. Exceeding 0.6V risks clipping or gain compression, particularly at temperature extremes. The input resistance is 17MΩ, and input current remains below 10µA across this range, ensuring minimal loading on upstream video DACs.