lmh6704mfx National Semiconductor Corporation, lmh6704mfx Datasheet

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lmh6704mfx

Manufacturer Part Number
lmh6704mfx
Description
650 Mhz Progammable Gain Buffer With Disable
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2006 National Semiconductor Corporation
LMH6704
650 MHz Selectable Gain Buffer with Disable
General Description
The LMH
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 selectable 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
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.
Connection Diagram
Ordering Information
LMH
6-Pin SOT23
8-Pin SOIC
Package
is a trademark of National Semiconductor Corporation.
6704 is a very wideband, DC coupled selectable
8-Pin SOIC
LMH6704MAX
LMH6704MFX
Part Number
Top View
LMH6704MA
LMH6704MF
DS201036
20103634
V
= +1), full
Package Marking
LMH6704MA
B07A
Features
n Wideband operation
n High output current
n Very low distortion
n Low noise
n High slew rate
n Supply current
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
— A
— A
— A
— 2
— Differential gain/Differential phase:
nd
V
V
V
/3
= +1, V
= +2, V
= +2, V
rd
harmonics (10 MHz, R
2.5k Units Tape and Reel
1k Units Tape and Reel
3k Units Tape and Reel
O
O
O
Transport Media
= 0.5 V
= 0.5 V
= 2 V
95 Units Rail
6-Pin SOT23
PP
Top View
PP
PP
L
= 100Ω):
September 2006
20103613
NSC Drawing
www.national.com
0.02%/0.02˚
2.3nV/
MF06A
M08A
3000 V/µs
650 MHz
450 MHz
400 MHz
11.5 mA
±
−62/−78
90 mA

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lmh6704mfx Summary of contents

Page 1

... SOIC and 6-Pin SOT23 packages. Connection Diagram 8-Pin SOIC Top View Ordering Information Package Part Number LMH6704MA 8-Pin SOIC LMH6704MAX LMH6704MF 6-Pin SOT23 LMH6704MFX LMH is a trademark of National Semiconductor Corporation. ™ © 2006 National Semiconductor Corporation Features n Wideband operation — + — + — ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 4) Human Body Model Machine Model Supply Voltage I OUT Common-Mode Input Voltage Maximum Junction Temperature ...

Page 3

Electrical Characteristics ± +25˚ + 5V Symbol Parameter CMIR Common Mode Input Range PSRR Power Supply Rejection Ratio V Output Voltage Swing O I Linear Output Current O ...

Page 4

Typical Performance Characteristics Unless Specified). Small Signal Frequency Response vs. Gain Small Signal Frequency Response vs. R Small Signal Frequency Response vs. Capacitive Load www.national.com ± 25˚ 5V Frequency Response vs. V 20103614 ...

Page 5

Typical Performance Characteristics Unless Specified). (Continued) Large Signal Pulse Response Harmonic Distortion vs. Frequency Harmonic Distortion vs. Output Voltage ± 25˚ 5V Small Signal Pulse Response 20103620 Harmonic Distortion vs. Load 20103622 ...

Page 6

Typical Performance Characteristics Unless Specified). (Continued) PSRR vs. Frequency Disable Timing www.national.com ± 25˚ 5V Errors vs. Temperature (A Typical Unit, (Note 7)) 20103628 Disable Output Glitch 20103630 6 = 100Ω, ...

Page 7

Application Information FIGURE 1. Recommended Gain of +2 Circuit FIGURE 2. Recommended Gain of +1 Circuit FIGURE 3. Recommended Gain of −1 Circuit GENERAL INFORMATION The LMH6704 is a high speed current feedback Selectable Gain Buffer (SGB), optimized for very ...

Page 8

Application Information UNITY GAIN COMPENSATION With a current feedback Selectable Gain Buffer like the LMH6704, the feedback resistor is a compromise between the value needed for stability at unity gain and the optimized value needed at a gain of two. ...

Page 9

Application Information approximately 250 µA. Because of the pull up resistor on the disable circuit, the I and I currents (positive and nega tive supply currents respectively) are not balanced in the disabled state. The positive supply current ...

Page 10

Application Information )/ θ (150˚ – where T MAX AMB JA AMB ture (˚C) and θ = Thermal resistance, from junction to JA ambient, for a given package (˚C/W). For the SOT23-6 pack- age θ is ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin SOIC NS Package Number M08A 6-Pin SOT23 NS Package Number MF06A 11 www.national.com ...

Page 12

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. For the most current product information ...

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