LM2202M - 230 MHz Video Amplifier | Texas Instruments
MPN: LM2202M ✓ Hoạt độngLM2202M Tóm tắt
A video amplifier system is a specialized analog signal-processing IC used to condition composite or component video signals for display equipment. Within the broader product hierarchy, it belongs to video amplifiers, then amplifier ICs, then analog and mixed-signal semiconductors. The LM2202M combines wideband video amplification with display-oriented control functions, reducing the number of separate external signal-conditioning blocks needed in a monitor design.
The primary headline specifications are a 230 MHz bandwidth rating, one video channel, and a 20-SOIC package with a stated body width of 7.50 mm. The SOIC package is a surface-mount plastic package compatible with conventional PCB assembly. Its long gull-wing leads provide inspection and rework access, while the 20-pin format gives the device separate connections for video processing, control, bypass, and supply functions.
The integrated black-level clamp comparator provides a way to establish and control the video black level in a display signal chain. Its differential input architecture is intended to reject unwanted common-mode variation at the clamp input. The DC-controlled attenuator supports contrast adjustment, while the sub-contrast control permits a lower-level adjustment of the attenuation range. Together, these functions support display designs in which picture brightness and contrast require external operator adjustment.
Typical applications include high-resolution monochrome CRT monitor front ends, RGB color monitor video channels, video projection equipment, and other display systems operating with wideband video signals. In these systems, the amplifier can process the incoming video waveform while the clamp and attenuation functions establish usable brightness and contrast behavior. Designers should preserve the recommended signal path topology because feedback, bypassing, and control-voltage routing materially affect bandwidth and stability.
Use the pin-description and application-circuit sections in the National Semiconductor manufacturer datasheet when assigning traces and selecting bypass capacitors. The 230 MHz rating identifies the device as a high-frequency video part rather than a general-purpose op amp. Board layout should therefore minimize trace length around the video input and output, maintain a continuous ground return, and keep the clamp and contrast-control networks away from high-current switching paths.
This page organizes the verified LM2202M package information, functional description, current sourcing path, and design guidance into a compact engineering reference. It also distinguishes exact drop-in replacements from suffix or packaging variants so that PCB reuse decisions are based on package, pinout, and function rather than part-number similarity alone.
Bộ thay thế dễ dàng lắp đặt cho LM2202M — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếLM2202M Tỷ lệ tối đa & tính chất điện
| Product Type | Video amplifier system |
| Manufacturer | Texas Instruments |
| Original Manufacturer | National Semiconductor |
| Video Channels | 1 channel |
| Amplifier Class | Standard general-purpose video amplifier |
| Bandwidth | 230 MHz |
| Integrated Functions | Wideband video amplifier, gated differential black-level clamp comparator, DC-controlled contrast attenuator, and sub-contrast control |
| Package Type | 20-SOIC |
| Total Pin Count | 20 pins |
| Package Width | 7.50 mm (0.295 inch) |
| Kiểu lắp đặt | Surface mount |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| Primary Application | High-resolution monochrome and RGB color monitor video channels |
| Temperature Grade | Commercial extended |
Hướng dẫn cấu hình chân LM2202M rectangular
Cấu hình chân cho LM2202M (rectangular gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM2202M.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2202M phù hợp cho 6 Áp dụngs: High-Resolution Monochrome Monitor Video Front End, RGB Color Monitor Video Channel, Video Projection Equipment, Video Test and Measurement Equipment, Industrial Video Signal Conditioning, Legacy Monitor Retrofit and Repair.
High-Resolution Monochrome Monitor Video Front End
The LM2202M fits a high-resolution monochrome monitor because its 230 MHz video-amplifier bandwidth accommodates a wideband display signal path in a 20-SOIC package. The integrated gated differential black-level clamp comparator helps establish the desired black reference, while the DC-controlled attenuator and sub-contrast function permit picture-level adjustment. Place the amplifier according to the manufacturer application circuit and keep video, clamp, and control routing short. The 7.50 mm-wide SOIC body is suitable for conventional surface-mount assembly, although signal integrity still depends on ground-plane continuity, trace geometry, and correct bypass placement.
RGB Color Monitor Video Channel
The LM2202M is suitable for an RGB color monitor front end because the manufacturer identifies it for high-resolution RGB applications and rates its video amplifier at 230 MHz. The black-level clamp and contrast-control functions support display calibration, while the sub-contrast control provides a finer adjustment within the attenuation range. Use the National Semiconductor application circuit as the basis for signal termination, gain-setting components, and supply bypassing. Preserve separation from high-current switching stages so that video edges are not degraded by coupled noise before reaching the display electronics.
Video Projection Equipment
In professional video projection equipment, the LM2202M can serve as a wideband conditioning stage for monochrome or RGB video signals. Its 230 MHz rating supports high-frequency video content, while the integrated clamp and attenuation controls can simplify the brightness and contrast interface between source electronics and the display driver. The design must follow the manufacturer's recommended topology to retain stability at the stated bandwidth. Keep feedback loops compact, maintain a low-impedance return path, and place bypass capacitors directly at the relevant supply pins to prevent video noise from appearing as brightness instability or edge disturbance.
Video Test and Measurement Equipment
The LM2202M can be used in video test equipment that requires a 230 MHz signal-conditioning path and adjustable display-like black-level and contrast behavior. Its integrated clamp comparator, contrast attenuator, and sub-contrast control make it useful where engineers need to reproduce or evaluate monitor signal characteristics. Use controlled impedance routing and a stable ground reference, and verify the selected operating points against the electrical-characteristics table. Because this is a display-oriented video amplifier rather than a general instrumentation amplifier, input range, gain configuration, and control-voltage limits should be checked before bench integration.
Industrial Video Signal Conditioning
The LM2202M can support industrial video conditioning where a monochrome or RGB signal must be processed at up to the device's stated 230 MHz bandwidth. Its integrated clamp and contrast functions reduce the need for separate display-style adjustment blocks in specialized industrial monitor panels. The 20-SOIC package simplifies integration with conventional display-controller boards, but the analog section still requires disciplined layout. Separate the 230 MHz video path from switching-power and digital clock regions, use the recommended bypass network, and check control-voltage tolerances to prevent brightness or contrast instability under varying supply conditions.
Legacy Monitor Retrofit and Repair
The LM2202M is appropriate for repairing or retrofitting monitor electronics that specifically use the LM2202 20-SOIC video-amplifier architecture. Its 230 MHz bandwidth, black-level clamp comparator, DC-controlled attenuation, and sub-contrast control reproduce the principal functions expected from the original device family. A board-level replacement should still be checked for exact pin assignments, supply requirements, gain configuration, and component revisions before installation. Pay particular attention to replaced bypass capacitors, feedback resistors, and control potentiometers, because incorrect values or high-ESR capacitors can alter stability and picture quality.
Dữ liệu tham khảo kỹ thuật cho LM2202M — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Brand | Texas Instruments |
| Package | 20-SOIC |
| Pin Count | 20 pins |
| Product Type | Video amplifier system |
| Video Channels | 1 channel |
| Bandwidth | 230 MHz |
| Amplifier Class | Standard general purpose |
| Package Width | 7.50 mm (0.295 inch) |
Bảo phân biệt quan trọng
- Combines a 230 MHz video amplifier with display-specific controls (vsGeneral-purpose operational amplifier)
- Purpose-built for monochrome and RGB monitor signal paths (vsStandard general-purpose video amplifier)
- Single integrated display-control subsystem (vsDiscrete clamp and attenuation implementation)
Ghi chú thiết kế
Route the 230 MHz video path as a short, controlled-impedance connection with a continuous ground reference. Follow the pin arrangement and recommended application topology in the National Semiconductor manufacturer datasheet, especially around the amplifier, feedback network, clamp comparator, and bypass connections. Avoid long loops and unnecessary vias because parasitic inductance and capacitance can reduce bandwidth or impair stability.
Place input, output, and bypass components close to their associated LM2202M pins. Use the capacitor types and values specified by the manufacturer application circuit, and maintain a low-impedance ground return for each capacitor. Incorrect capacitance, long supply traces, or high-ESR components can alter the 230 MHz amplifier response and introduce visible video noise or instability.
Do not assume that a similarly named LM2202 order code is an automatic drop-in replacement. Confirm the 20-SOIC dimensions, all 20 pin assignments, supply voltage, gain network, clamp polarity, and contrast-control voltage against the manufacturer data sheet. Suffix and packing changes can affect procurement or assembly without changing the core device function, so verify each exact orderable part number before substitution.
Separate the wideband video path from switching converters, clocked digital circuits, and high-current return paths. Keep the black-level clamp and contrast-control traces away from sources of coupled energy, and use a continuous ground plane where practical. If video edges or blanking intervals show instability, inspect bypass placement, feedback-loop geometry, grounding continuity, and supply decoupling before changing gain components.
Thông tin tuân thủ
The LM2202M is a commercial-grade video amplifier system, so AEC-Q100 automotive qualification is not applicable. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations are not stated by the manufacturer and remain unknown.
