LMH6704MA/NOPB National Semiconductor, LMH6704MA/NOPB Datasheet - Page 7

• Manufacturer Part Number: LMH6704MA/NOPB
• Description: IC BUFFER PROG GAIN 650MHZ 8SOIC
• Manufacturer: National Semiconductor
• Series: LMH®r

Specifications of LMH6704MA/NOPB

• Amplifier Type: Buffer
• Number Of Circuits: 1
• Slew Rate: 3000 V/µs
• -3db Bandwidth: 650MHz
• Current - Input Bias: 5µA
• Voltage - Input Offset: 2000µV
• Current - Supply: 11.5mA
• Current - Output / Channel: 90mA
• Voltage - Supply, Single/dual (±): 8 V ~ 12 V, ±4 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• For Use With: LMH730227 - BOARD EVALUATION FOR SOIC PKGLMH730165 - BOARD EVALUATIONLMH730216 - BOARD EVAL HS MONO AMP SOT23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Gain Bandwidth Product: -
• Other names: *LMH6704MA; *LMH6704MA/NOPB; LMH6704MA

Application Information
FIGURE 1. Recommended Gain of +2 Circuit
FIGURE 2. Recommended Gain of +1 Circuit
FIGURE 3. Recommended Gain of −1 Circuit
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GENERAL INFORMATION
The LMH6704 is a high speed current feedback Selectable
Gain Buffer (SGB), optimized for very high speed and low
distortion. With its internal feedback and gain-setting resis-
tors the LMH6704 offers excellent AC performance while
simplifying board layout and minimizing the affects of layout
related parasitic components. The LMH6704 has no internal
ground reference so single or split supply configurations are
both equally useful.
SETTING THE CLOSED LOOP GAIN
The LMH6704 is a current feedback amplifier with on-chip
R
+2, A
described in the chart below.
The gain accuracy of the LMH6704 is accurate and guaran-
teed over temperature to within
setting resistors, R
architecture takes advantage of the fact that the internal gain
setting resistors track each other well over a wide range of
temperature and process variation to keep the overall gain
constant, despite the fact that the individual resistors have
nominal temperature drifts. Therefore, using external resis-
tors in series with R
gain accuracy over temperature.
−1 V/V
+1 V/V
+2 V/V
F
GAIN A
= R
FIGURE 4. Alternate Unity Gain Configuration
V
G
= +1, or an A
= 465Ω. As such it can be configured with an A
V
Non-Inverting (Pin 3) Inverting (Pin 4)
Ground
Input Signal
Input Signal
F
and R
G
V
to change the gain will result in poor
= −1 by connecting pins 3 and 4 as
G
Input Connections
, match very well. The LMH6704
±
1%. The internal gain
Input Signal
NC (Open)
Ground
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V
=