LMH6739MQ National Semiconductor, LMH6739MQ Datasheet - Page 8

• Manufacturer Part Number: LMH6739MQ
• Manufacturer: National Semiconductor

Specifications of LMH6739MQ

• Power Supply Requirement: Single
• Single Supply Voltage (typ): 9V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 8V
• Single Supply Voltage (max): 12V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Package Type: SSOP
• Lead Free Status / RoHS Status: Not Compliant

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Application Information
FIGURE 1. Recommended Non-Inverting Gain Circuit,
FIGURE 2. Recommended Non-Inverting Gain Circuit,
FIGURE 3. Recommended Inverting Gain Circuit,
Gain = +2
Gain = –1
Gain +1
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20104103
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8
GENERAL INFORMATION
The LMH6739 is a high speed current feedback selectable
gain buffer (SGB), optimized for very high speed and low dis-
tortion. With its internal feedback and gain-setting resistors
the LMH6739 offers excellent AC performance while simpli-
fying board layout and minimizing the affects of layout related
parasitic components. The LMH6739 has no internal ground
reference so single or split supply configurations are both
equally useful.
SETTING THE CLOSED LOOP GAIN
The LMH6739 is a current feedback amplifier with on-chip
R
A
as described in the chart below.
The gain of the LMH6739 is accurate to ±1% and stable over
temperature. The internal gain setting resistors, R
match very well. However, over process and temperature
their absolute value will change. Using external resistors in
series with R
curacy over temperature and from part to part.
−1 V/V
+1 V/V
+2 V/V
FIGURE 5. Frequency Response for Circuit in Figure 4
V
F
= +2, A
= R
GAIN A
FIGURE 4. Correction for Unity Gain Peaking
G
= 450Ω. As such it can be configured with an
V
V
= +1, or an A
G
to change the gain will result in poor gain ac-
Non-Inverting
Ground
Input Signal
Input Signal
V
INPUT CONNECTIONS
= −1 by connecting pins 3 and 4
Inverting
Input Signal
NC (Open)
Ground
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F
and R
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G
,