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LMH6704
650 MHz Programmable Gain Buffer with Disable
General Description
The LMH
™
6704 is a very wideband, DC coupled program-
mable gain buffer designed specifically for wide dynamic
range systems requiring exceptional signal fidelity. The
LMH6704 includes on chip feedback and gain set resistors,
simplifying PCB layout while providing user programmable
gains of +1, +2 and −1 V/V. The LMH6704 provides a disable
pin, which places the amplifier in a high output impedance,
low power mode. The Disable pin may be allowed to float
high.
With a 650 MHz Small Signal Bandwidth (A
V
= +1), full
power gain flatness to 200 MHz, and excellent Differential
Gain and Phase, the LMH6704 is optimized for video appli-
cations. High resolution video systems will benefit from the
LMH6704’s ability to drive multiple video loads at low levels
of differential gain or differential phase distortion.
The LMH6704 is constructed with National’s proprietary high
speed complementary bipolar process using National’s
proven current feedback circuit architectures. It is available
in 8-Pin SOIC and 6-Pin SOT23 packages.
Features
n Wideband operation
—A
V
= +1, V
O
= 0.5 V
PP
650 MHz
—A
V
= +2, V
O
= 0.5 V
PP
450 MHz
—A
V
= +2, V
O
=2V
PP
400 MHz
n High output current
±
90 mA
n Very low distortion
—2
nd
/3
rd
harmonics (10 MHz, R
L
= 100Ω): −62/−78
— Differential gain/Differential phase: 0.02%/0.02˚
n Low noise 2.3nV/
n High slew rate 3000 V/µs
n Supply current 11.5 mA
Applications
n HDTV, NTSC & PAL video systems
n Video switching and distribution
n ADC driver
n DAC buffer
n RGB driver
n High speed multiplexer
Connection Diagram
8-Pin SOIC 6-Pin SOT23
20103634
Top View
20103613
Top View
Ordering Information
Package Part Number Package Marking Transport Media NSC Drawing
8-Pin SOIC
LMH6704MA
LMH6704MA
95 Units Rail
M08A
LMH6704MAX 2.5k Units Tape and Reel
6-Pin SOT23
LMH6704MF
B07A
1k Units Tape and Reel
MF06A
LMH6704MFX 3k Units Tape and Reel
LMH
™
is a trademark of National Semiconductor Corporation.
May 2005
LMH6704 650 MHz Programmable Gain Buffer with Disable
© 2005 National Semiconductor Corporation DS201036 www.national.com
Verzeichnis
- ・ Abmessungen des Paketumrisses on Seite 11
- ・ Teilenummerierungssystem on Seite 1
- ・ Markierungsinformationen on Seite 1
- ・ Blockdiagramm on Seite 8
- ・ Schweißen Temperatur on Seite 2
- ・ Beschreibung der Funktionen on Seite 1
- ・ Technische Daten on Seite 2 Seite 3
- ・ Anwendungsbereich on Seite 1
- ・ Elektrische Spezifikation on Seite 2 Seite 3 Seite 4 Seite 5 Seite 6
