Analog Devices Inc./Maxim Integrated MAX7452ESA+

Overview

MAX7452ESA+ from Maxim Integrated is a single-supply, standard-definition video-signal conditioner IC that restores DC level, corrects amplitude errors up to ±6dB, detects loss-of-sync (LOS), and filters out-of-band noise via a 2nd-order lowpass filter with 10MHz cutoff. It features user-adjustable back-porch clamp level (1.2V–2.0V), selectable 0dB/+6dB output buffer gain, and drives 150Ω video loads with 1VP-P or 2VP-P output swing. Used in security camera front-ends before ADCs or video decoders.

For engineers reviewing the MAX7452ESA+ datasheet, MAX7452ESA+ pinout, MAX7452ESA+ application, or MAX7452ESA+ equivalent, key selection considerations include its +5V single-supply operation, adjustable clamp reference (BPLVL), AGC-disable control (AGCD), LOS fault flag, and compatibility with DC-coupled video decoder inputs requiring precise black-level alignment.

Technical Context

The MAX7452ESA+ implements concurrent but decoupled control loops: a fast back-porch clamp (settling within ~70 lines) and a slow digital AGC loop (settling over 1000–64,000 lines), eliminating interaction. Its clamp references an external voltage at BPLVL, enabling black-level alignment matched to ADC reference voltages.

It integrates a sync separator and amplitude detector for LOS generation (asserted after ≥15 missing horizontal lines), a 2nd-order lowpass noise filter (10MHz cutoff), and a rail-to-rail output buffer optimized for 150Ω loads. Gain is set by GSET (0dB or +6dB), independent of AGC adjustment, yielding total gain range from –6dB to +12dB.

Key Specifications

Pinout & Package

MAX7452ESA+ is housed in an 8-pin SOIC package with exposed pad (SO-EP), specified for –40°C to +85°C operation. The exposed pad must be connected to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video-signal conditioning applications.

Compared with MAX7451ESA+, MAX7452ESA+ eliminates negative supply dependency and enables black-level calibration for ADCs; compared with LMH1982MTX/NOPB, it delivers full AGC, adjustable clamp, and noise filtering-making it the only drop-in solution for complete SD video front-end restoration in +5V systems.

Availability

MAX7452ESA+ is available at Aetrix Electronics and suitable for security video systems, multi-channel video switchers, and automotive rear-view camera interfaces requiring stable component supply, extended temperature support, and long-term production continuity.

Supply support for MAX7452ESA+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.

The MAX7452ESA+ belongs to Maxim's video-signal conditioning product line, engineered specifically to restore analog composite video integrity in resource-constrained embedded systems before digitization or display.

FAQ

What is the function of the BPLVL pin on the MAX7452ESA+?

The BPLVL pin on the MAX7452ESA+ sets the output back-porch (blanking) voltage level. When GSET = 1 (+6dB gain), the output black level equals the BPLVL voltage (1.2V–2.0V). When GSET = 0 (0dB gain), it equals BPLVL/1.5. This enables precise DC-level alignment with the reference voltage of downstream ADCs or video decoders, supporting robust DC-coupled interfacing without external level-shifting circuitry. The MAX7452ESA+ relies on this pin for black-level accuracy in digitization pipelines.

Can the MAX7452ESA+ operate with a negative supply rail?

No, the MAX7452ESA+ is designed exclusively for single +5V supply operation. Unlike the MAX7450ESA+ (±5V) or MAX7451ESA+ (±3.3V), it has no VSS pin and does not support negative supplies. Its exposed pad must be connected to GND-not VSS-and all absolute maximum ratings assume only +5V applied to VCC. Attempting to apply a negative voltage risks permanent damage. The MAX7452ESA+ achieves GND-referenced functionality through internal architecture and the BPLVL input, eliminating the need for dual rails.

How does the AGC loop interact with the output buffer gain setting on the MAX7452ESA+?

The AGC loop and output buffer gain (set by GSET) operate independently on the MAX7452ESA+. AGC adjusts overall signal gain to normalize sync amplitude to a fixed internal reference, covering ±6dB input variation. The buffer gain (0dB or +6dB) scales the final output regardless of AGC state. Total gain is the product of AGC gain and buffer gain, ranging from –6dB to +12dB. This separation ensures predictable output swing (1VP-P or 2VP-P) even as AGC compensates for input-level drift-critical for consistent ADC input range utilization in the MAX7452ESA+.

What is the purpose of the LOS output on the MAX7452ESA+?

The LOS (Loss-of-Sync) output on the MAX7452ESA+ is an open-drain logic signal that goes high when video sync is absent for more than 15 consecutive horizontal lines-indicating camera failure, cable disconnect, or signal loss. It provides real-time fault detection without software polling, enabling immediate system response (e.g., switching to backup camera or triggering alert). The LOS pin simplifies diagnostics in multi-camera systems and is electrically compatible with standard logic interfaces, making it a key reliability feature of the MAX7452ESA+ in security and automotive applications.

Does the MAX7452ESA+ require external passive components for basic operation?

Yes, the MAX7452ESA+ requires external components for stable operation: a 0.1µF AC-coupling capacitor on the IN pin, 1µF + 0.1µF bypass capacitors on VCC to GND, and a stable voltage source (e.g., resistor divider or reference IC) on BPLVL. The exposed pad must be soldered to a GND copper area. No external filter components are needed-the 10MHz 2nd-order lowpass filter is fully integrated. These minimal external requirements reduce bill-of-materials cost while ensuring optimal noise rejection and thermal performance in the MAX7452ESA+.