LM2421 NSC | Alldatasheet

Document overview

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Technical content

Features

n Stable with 0–20 pF capacitive loads and inductive peaking networks n Convenient TO-220 staggered lead package style n Maintains standard LM240X Family pinout which is designed for easy PCB layout

Applications

n AC coupled HDTV applications using the 1080i and 720p formats as well as standard NTSC and PAL formats. Schematic and Connection Diagrams DS200233-1 FIGURE 1. Simplified Schematic Diagram

Absolute Maximum Ratings(Notes 1, 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V CC ) +155V Bias Voltage (VBB ) +15V Input Voltage (VIN) -0.5V to V BB +0.5V Storage Temperature Range (TSTG ) −65˚C to +150˚C Lead Temperature (Soldering,<10 sec.) 300˚C ESD Tolerance, Human Body Model 2kV Machine Model 200V Junction Temperature 150˚C θ JC (typ) 2.8˚C/W Operating Ranges(Note 2) VCC +130V to +150V VBB +7V to +13V VIN +1V to +5V VOUT +16V to +135V Do not operate the part without a heat sink.

Electrical Characteristics

(See Figure 2for Test Circuit) Unless otherwise noted: VCC = +145V, VBB = +8V, CL = 8 pF, TC = 50˚C DC Tests: VIN = 2.8VDC AC Tests: Output = 100VPP (32V - 132V) at 1MHz Symbol Parameter Conditions LM2421 UnitsMin Typical Max ICC Supply Current All Three Channels, No Input Signal, No Output Load 43 55 mA IBB Bias Current All Three Channels 29 40 mA VOUT DC Output Voltage No AC Input Signal 78 82 86 V DC AV DC Voltage Gain No AC Input Signal −38 −42 −46 ΔAV Gain Matching (Note 4), No AC Input Signal 1.0 dB LE Linearity Error (Notes 4, 5), No AC Input Signal 8 % t R Rise Time (Note 6), 10% to 90% 11 ns tF Fall Time (Note 6), 90% to 10% 13 ns OS Overshoot (Note 6) 2 % Note 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2:Operating ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may change when the device is not operated under the listed test conditions. Note 3:All voltages are measured with respect to GND, unless otherwise specified. Note 4:Calculated value from Voltage Gain test on each channel. Note 5:Linearity Error is the variation in dc gain from VIN = 1.8V to VIN = 3.8V. Note 6:Input from signal generator: tr,tf < 1 ns. LM2421 www.national.com 2

FIGURE 9. Power Derating Curve

FIGURE 11. LM126X/LM2421 Demonstration Board Schematic

FIGURE 12. LM126X/LM2421 Demonstration Board Schematic (continued)

FIGURE 13. LM126X/LM2421 Demo Board Layout

FIGURE 14. Trace Routing and Component Placement for Blue Channel Output

Physical Dimensionsinches (millimeters) unless otherwise noted LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com CONTROLLING DIMENSION IS INCH VALUES IN [ ] ARE MILLIMETERS Order Number LM2421TA LM2421 Monolithic Triple Channel HDTV Driver National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.