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Analog Devices Inc./Maxim Integrated MAX7451ESA+
- Part No.:
- MAX7451ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MAX7451ESA+.pdf
- Description:
- IC VIDEO CONDITIONER 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,431
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Product details
Overview
MAX7451ESA+ from Maxim Integrated is a standard-definition video signal conditioner IC that restores DC level, corrects ±6dB amplitude errors, detects loss-of-sync (LOS), and filters out-of-band noise. It operates from dual ±3.3V supplies, clamps back-porch to GND, drives 150Ω video loads with 0dB or +6dB selectable buffer gain, and is specified for -40°C to +85°C operation in security video systems.
For engineers reviewing the MAX7451ESA+ datasheet, MAX7451ESA+ pinout, MAX7451ESA+ application, or MAX7451ESA+ equivalent, key selection criteria include its ±3.3V dual-supply operation, GND-referenced clamp, AGC accuracy of ±10%, 10MHz noise-filter cutoff, and compatibility with crosspoint switches like MAX4358 and OSD processors like MAX4455.
Technical Context
The MAX7451ESA+ integrates a 2nd-order lowpass noise filter (10MHz cutoff), back-porch clamp with 70-line response time, and digitally stepped AGC loop settling between 1000–64,000 lines. Its clamp and AGC operate concurrently but decoupled via distinct time constants to prevent interaction.
It features logic-controlled gain setting (GSET) and AGC disable (AGCD), both compatible with 0.3×VCC/0.7×VCC thresholds. The output buffer delivers full-scale 1VP-P or 2VP-P signals into 150Ω loads while maintaining differential gain ≤0.6% and differential phase ≤0.6° across NTSC/PAL frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±3.3V ±5% - enables low-voltage dual-rail operation without level-shifting in modern video front-ends |
| Clamp Reference | GND - eliminates need for large AC-coupling capacitors and reduces line-time distortion (tilt) |
| AGC Range | ±6dB - normalizes sync amplitude to standard video level despite input cable loss or source variation |
| Noise Filter Cutoff | 10MHz - suppresses high-frequency noise from long coaxial cables while preserving baseband video fidelity |
| Output Drive | 150Ω load with 0dB/+6dB gain - directly interfaces legacy video equipment without external amplification |
| Differential Gain/Phase | ≤0.6%/≤0.6° - ensures color fidelity in composite video applications such as CCTV and analog broadcast |
| LOS Detection | 15 horizontal lines - provides reliable fault indication for camera disconnect or cable failure in security systems |
Pinout & Package
MAX7451ESA+ is housed in an 8-pin SOIC package with exposed pad (SO-EP, package code S8E-12), optimized for thermal dissipation and EMI suppression in video signal chains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Positive supply rail | +3.3V input; requires local 1µF + 0.1µF bypassing to GND for stable operation |
| 2 IN | AC-coupled video input | Accepts composite video via 0.1µF capacitor; internal clamp establishes DC baseline |
| 3 GND | Analog/digital ground reference | Common return for all signals and supplies; must be low-impedance plane |
| 4 VSS | Negative supply rail | -3.3V input; requires identical bypassing as VCC; EP must connect to VSS |
| 5 AGCD | AGC disable control | Logic-high disables AGC; logic-low enables automatic gain normalization |
| 6 OUT | Video output driver | DC-coupled 150Ω-compatible output; supports 1VP-P (GSET=0) or 2VP-P (GSET=1) |
| 7 GSET | Buffer gain select | High = +6dB (2×), Low = 0dB (1×); sets output amplitude independent of AGC loop |
| 8 LOS | Loss-of-sync indicator | Open-drain logic-high when sync absent ≥15 lines; used for system fault reporting |
Key Features
| Feature | Design Value |
|---|---|
| Back-porch clamp to GND | Eliminates external coupling capacitors, reducing tilt distortion and PCB area in CCTV front-ends |
| ±6dB AGC with ±10% accuracy | Maintains consistent sync amplitude across variable input levels, enabling robust decoding downstream |
| 10MHz out-of-band noise filter | Rejects RF interference and switching noise introduced by long coaxial runs in multi-camera systems |
| 0dB/+6dB user-selectable output gain | Matches signal level requirements of downstream crosspoint switches (e.g., MAX4358) or ADCs |
| LOS detection with 15-line threshold | Provides deterministic fault flag for camera link monitoring without software polling |
Applications
| Security Video Systems | Video-Switching Systems |
|---|---|
|
Use Scenario: Multi-camera analog CCTV system with centralized matrix switcher and display wall. IC Role / Device Role / Timing Role: Front-end signal conditioner restoring DC level and amplitude before routing through MAX4358 crosspoint switch. Use Value: Enables GND-referenced outputs that match MAX4358 input requirements, eliminating level-shifting and ensuring accurate OSD overlay brightness. |
Use Scenario: 32×16 analog video routing infrastructure in access control or transportation monitoring. IC Role / Device Role / Timing Role: Signal integrity enhancer placed at each camera input to compensate for cable loss and noise before switching. Use Value: Maintains differential gain/phase <0.6% across channels, preserving color fidelity during real-time switching between live feeds. |
| Legacy Broadcast Monitoring | Analog-to-Digital Conversion Interface |
|
Use Scenario: Studio-grade analog video monitoring chain feeding waveform monitors and vectorscopes. IC Role / Device Role / Timing Role: Standard-definition video conditioner ensuring stable blanking level and amplitude compliance per SMPTE 170M. Use Value: Provides precise ±50mV clamp accuracy and 60dB 50/60Hz rejection, critical for measurement-grade signal analysis. |
Use Scenario: Analog video digitization path feeding MAX1186 or similar 10-bit video ADCs. IC Role / Device Role / Timing Role: Pre-ADC signal conditioner delivering DC-coupled, amplitude-normalized video with defined black level. Use Value: Delivers 2VP-P output (GSET=1) aligned to ADC full-scale range, maximizing SNR (65dB) and minimizing quantization error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video signal conditioning applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7450ESA+ | ±5V dual supply; same pinout and feature set except higher supply voltage and tighter PSRR (35dB vs. 30dB) | Preferred where ±5V rails are already available; better noise immunity in electrically noisy environments | Select MAX7450ESA+ when system uses ±5V supplies and requires higher PSRR; not drop-in for ±3.3V designs |
| MAX7452ESA+ | +5V single supply; adjustable back-porch level via BPLVL pin; no VSS pin; exposed pad connected to GND | Required for single-supply systems interfacing to ADCs with DC-coupled inputs and external reference alignment | Select MAX7452ESA+ for +5V-only systems needing programmable black-level control; incompatible pinout due to BPLVL/VSS swap |
Compared with MAX7450ESA+ and MAX7452ESA+, the MAX7451ESA+ uniquely balances low-voltage dual-rail operation (±3.3V), GND-referenced clamping, and pin compatibility with legacy MAX7450 layouts-making it optimal for space-constrained, power-sensitive security video front-ends requiring minimal redesign.
Availability
MAX7451ESA+ is available at Aetrix Electronics and suitable for security video systems, analog video switching infrastructure, and legacy broadcast monitoring equipment requiring stable component supply and extended temperature support (-40°C to +85°C).
Supply support for MAX7451ESA+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX7450/MAX7451/MAX7452 product line was designed specifically for standard-definition analog video signal conditioning-addressing DC restoration, amplitude correction, noise filtering, and fault detection in CCTV, broadcast, and video switching systems.
FAQ
What is the supply voltage requirement for MAX7451ESA+?
The MAX7451ESA+ requires dual ±3.3V ±5% supplies (VCC = +3.3V, VSS = -3.3V). It does not operate from single +5V or ±5V rails. Exceeding ±4V on either rail risks permanent damage, as specified in the Absolute Maximum Ratings table. Proper local bypassing with 1µF and 0.1µF capacitors is mandatory for stable operation of the MAX7451ESA+.
How does the back-porch clamp function in MAX7451ESA+?
The MAX7451ESA+ clamps the video signal's back-porch voltage precisely to GND using an internal feedback loop. This restores the DC level of composite video signals, enabling accurate on-screen display (OSD) insertion and analog-to-digital conversion. Unlike the MAX7452ESA+, it does not support adjustable clamp levels-the MAX7451ESA+ clamp is fixed and GND-referenced.
Can MAX7451ESA+ drive a 150Ω video load directly?
Yes, the MAX7451ESA+ output buffer is designed to drive standard 150Ω video loads directly. With GSET = 0, it delivers 1VP-P; with GSET = 1, it delivers 2VP-P. Both configurations maintain differential gain ≤0.6% and differential phase ≤0.6°, meeting NTSC/PAL specifications. No external amplification or impedance matching is required for the MAX7451ESA+ to interface with legacy video equipment.
What does the LOS output indicate on MAX7451ESA+?
The LOS (Loss-of-Sync) pin on MAX7451ESA+ asserts logic-high when video sync is absent for more than 15 consecutive horizontal lines-indicating camera disconnect, cable break, or source failure. It is an open-drain output requiring a pull-up resistor. This hardware-level fault flag enables immediate system-level response without software polling, making it essential for mission-critical security video applications using MAX7451ESA+.
Is MAX7451ESA+ pin-compatible with MAX7450ESA+?
Yes, MAX7451ESA+ is pin-compatible with MAX7450ESA+ in the 8-pin SO-EP package, sharing identical pin functions and layout. The only differences are supply voltage (±3.3V vs. ±5V) and minor electrical specs (e.g., PSRR = 30dB vs. 35dB). This allows direct substitution in existing MAX7450ESA+ designs when migrating to lower-voltage operation-provided the ±3.3V rails are available and bypassed appropriately for the MAX7451ESA+.
MAX7451ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Conditioner
- Applications:
- Professional Video
- Standards:
- -
- Control Interface:
- -
- Voltage - Supply:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC-EP
MAX7451ESA+ FAQ
1.How can I place an order for MAX7451ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX7451ESA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX7451ESA+ reliable?
The price and inventory of MAX7451ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX7451ESA+ is usually 5 days.
3.What payment methods are accepted for MAX7451ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX7451ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX7451ESA+?
MAX7451ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX7451ESA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX7451ESA+?
For technical support, including MAX7451ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX7451ESA+ requirements.
6.How does Aetrix verify that MAX7451ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX7451ESA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX7451ESA+ meets industry standards.
7.What is the process for return or replacement of MAX7451ESA+?
All MAX7451ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX7451ESA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX7451ESA+ part is unused and in its original packaging.
Return procedure for MAX7451ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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