LMH6504 Datasheet, PDF (1/29 Pages) National Semiconductor (TI) – Wideband, Low Power, Variable Gain Amplifier

LMH6504
www.ti.com
SNOSA96D – NOVEMBER 2003 – REVISED MARCH 2013
LMH6504 Wideband, Low Power, Variable Gain Amplifier
Check for Samples: LMH6504
FEATURES
1
•23 V_S = ±5V, T_A = 25°C, R_F = 1 KΩ, R_G = 100Ω, R_L
= 100Ω, A_V = A_VMAX = 9.7V/V, Typical values
unless specified.
• −3 dB BW 150 MHz
• Gain control BW 150 MHz
• Adjustment range (<10 MHz) 80 dB
• Output offset voltage ±55 mV
• Gain matching (limit) ±0.42 dB
• Supply voltage range 7V to 12V
• Slew rate (inverting) 1500 V/μs
• Supply Current (no load) 11 mA
• Linear Output Current ±60 mA
• Output Voltage Swing ±2.2V
• Input Noise Voltage 4.4 nV/√Hz
• Input Noise Current 2.6 pA/√Hz
• THD (20 MHz, R_L = 100Ω, V_O = 2 V_PP) −45 dBc
• Replacement for CLC5523
APPLICATIONS
• Variable attenuator
• AGC
• Voltage controlled filter
• Video imaging processing
DESCRIPTION
The LMH™6504 is a wideband DC coupled voltage
controlled gain stage followed by a high-speed
current feedback Op Amp which can directly drive a
low impedance load. Gain adjustment range is 80 dB
for up to 10 MHz by varying the gain control input
voltage, V_G.
Maximum gain is set by external components, and
the gain can be reduced all the way to cut-off. Power
consumption is 110 mW with a speed of 150 MHz
and a gain control bandwidth (BW) of 150 MHz.
Output referred DC offset voltage is less than 55 mV
over the entire gain control voltage range. Device-to-
device gain matching is within ±0.42 dB at maximum
gain. Furthermore, gain is tested over a wide range.
The output current feedback Op Amp allows high
frequency large signals (Slew Rate > 1500 V/μs) and
can also drive a heavy load current (60 mA). Near
ideal input characteristics (i.e. low input bias current,
low offset, low pin 3 resistance) enable the device to
be easily configured as an inverting amplifier as well
(see Application Information section for details).
To provide ease of use when working with a single
supply, V_G range is set to be from 0V to +2V relative
to the ground pin potential (pin 4). V_G input
impedance is high in order to ease drive requirement.
In single supply operation, the ground pin is tied to a
"virtual" half supply.
30
20
10
0
-10
-20
-30 _125°C
-40 _25°C
-50
-55°C
-60
-70
-80
-90
-0.5 0
dB
0.5
1
V_G (V)
12
11
10
9
-55°C
8
25°C
7
125°C
6
(V/V)
5
4
3
2
1
0
1.5
2
V_IN
R_G
100:
Typical Application
V_G
V⁺
1
2
8
3
7
4
5
V^-
6
R_F
1 k:
R_L
100:
Figure 1. Gain vs. V_G
Figure 2. A_VMAX = 9.7 V/V
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
LMH is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated