Datasheet

0.1
1 10 100 1000
FREQUENCY (MHz)
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
GAIN (dB)
R
F
= 800:
R
F
= 1200:
R
F
= 2000:
V
S
= ±2.5V
V
OUT
= 1V
PP
LMH6723, LMH6724, LMH6725
www.ti.com SNOSA83H –AUGUST 2003–REVISED APRIL 2013
APPLICATION SECTION
GENERAL INFORMATION
The LMH6723/LMH6724/LMH6725 is a high speed current feedback amplifier manufactured on Texas
Instruments' VIP10 (Vertically Integrated PNP) complimentary bipolar process. LMH6723/LMH6724/LMH6725
offers a unique combination of high speed and low quiescent supply current making it suitable for a wide range of
battery powered and portable applications that require high performance. This amplifier can operate from 4.5V to
12V nominal supply voltages and draws only 1 mA of quiescent supply current at 10V supplies (±5V typically).
The LMH6723/LMH6724/LMH6725 has no internal ground reference so single or split supply configurations are
both equally useful.
EVALUATION BOARDS
Texas Instruments provides the following evaluation boards as a guide for high frequency layout and as an aid in
device testing and characterization. Many of the datasheet plots were measured with these boards.
Device Package Board Part Number
LMH6723MA SOIC-8 LMH730227
LMH6723MF SOT-23 LMH730216
LMH6724MA SOIC-8 LMH730036
LMH6725MA SOIC-14 LMH730231
These evaluation boards can be shipped when a device sample request is placed with Texas Instruments.
FEEDBACK RESISTOR SELECTION
One of the key benefits of a current feedback operational amplifier is the ability to maintain optimum frequency
response independent of gain by using appropriate values for the feedback resistor (R
F
). The Electrical
Characteristics and Typical Performance plots were generated with an R
F
of 1200Ω, a gain of +2V/V and ±5V or
±2.5V power supplies (unless otherwise specified). Generally, lowering R
F
from it's recommended value will peak
the frequency response and extend the bandwidth; however, increasing the value of R
F
will cause the frequency
response to roll off faster. Reducing the value of R
F
too far below it's recommended value will cause overshoot,
ringing and, eventually, oscillation.
Figure 37. Frequency Response vs. R
F
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Product Folder Links: LMH6723 LMH6724 LMH6725