LM2457 datasheet(5/14 Pages) NSC

Part #	LM2457

Description	Monolithic Triple 7.5nS CRT Driver With Integrated Clamp and G1 Blanking

PDF	14 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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5 / 14 page

DC CLAMP Electrical Characteristic Targets and Limits (See Figure 11 for Test Circuit)

Unless otherwise noted: V

CC1 = +80V, VCC2 = 120V, VBB = +8V, VIN = 1.4VDC,TC = 50˚C, VREF = 1.735V, SW1 open.

HEATSINK MUST BE GROUNDED.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

CC2

CC2 Supply Current

All Channel, No AC input signal,

IN = 1.25V

2.4

OUT

Typical DC Output Voltage

No AC Input Signal, V

IN = 1.4V

VTYP

Typical DC Voltage Gain

No AC Input Signal

TYP

Typical Linearity Error

No AC Input Signal (Note 6)

Note 6: Linearity Error is the variation in DC gain from VIN = 1.0V to VIN = 1.5V.

Clamp Amplifier Test Circuit

Figure 11 shows the test circuit for evaluation of the LM2457 clamp amplifier. A high impedance VM (>100 M

Ω) is used for DC

measurements at the outputs.

DS101379-11

FIGURE 11. Test Circuit (One Channel)

DS101379-12

FIGURE 12. Clamp Circuit V

O vs. VIN

LM2457 Datasheet(PDF) 5 Page - National Semiconductor (TI)