LMH6739MQ/NOPB National Semiconductor, LMH6739MQ/NOPB Datasheet - Page 8

• Manufacturer Part Number: LMH6739MQ/NOPB
• Description: IC VIDEO BUFFER TRPL PROG 16SSOP
• Manufacturer: National Semiconductor

Specifications of LMH6739MQ/NOPB

• Applications: Buffer
• Number Of Circuits: 3
• -3db Bandwidth: 750MHz
• Slew Rate: 3300 V/µs
• Current - Supply: 32mA
• Current - Output / Channel: 90mA
• Voltage - Supply, Single/dual (±): 8 V ~ 12 V, ±4 V ~ 6 V
• Mounting Type: Surface Mount
• Package / Case: 16-LSSOP (0.154", 3.91mm Width)
• No. Of Amplifiers: 3
• Gain Bandwidth: 750MHz
• Supply Voltage Range: 8V To 12V
• Output Current: 90mA
• Amplifier Output: Single Ended
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• For Use With: LMH730275 - EVAL BOARD HS TRIPLE SSOP OPAMP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LMH6739MQ; *LMH6739MQ/NOPB; LMH6739MQ

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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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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
,