-0.5

0

0.5

1

1.5

VG (V)

2

-90

-80

-70

-60

-50

-40

30

-30

-20

-10

0

10

20

0

1

2

3

4

5

12

6

7

8

9

10

11

dB

(V/V)

-55°C

25°C

125°C

-55°C

25°C

125°C

VIN

1

8

3

2

5

4

7

6

RF

1 k:

RL

100:

RG

100:

V

-

V

+

VG

LMH6504

www.ti.com

SNOSA96D – NOVEMBER 2003 – REVISED MARCH 2013

LMH6504 Wideband, Low Power, Variable Gain Amplifier

Check for Samples: LMH6504

1

FEATURES

DESCRIPTION

The LMH™6504 is a wideband DC coupled voltage

23

•

VS = ±5V, TA = 25°C, RF = 1 KΩ, RG = 100Ω, RL

controlled gain stage followed by a high-speed

= 100

Ω, AV = AVMAX = 9.7V/V, Typical values

current feedback Op Amp which can directly drive a

unless specified.

low impedance load. Gain adjustment range is 80 dB

•

−3 dB BW 150 MHz

for up to 10 MHz by varying the gain control input

voltage, VG.

•

Gain control BW 150 MHz

•

Adjustment range (<10 MHz) 80 dB

Maximum gain is set by external components, and

the gain can be reduced all the way to cut-off. Power

•

Output offset voltage ±55 mV

consumption is 110 mW with a speed of 150 MHz

•

Gain matching (limit) ±0.42 dB

and a gain control bandwidth (BW) of 150 MHz.

•

Supply voltage range 7V to 12V

Output referred DC offset voltage is less than 55 mV

over the entire gain control voltage range. Device-to-

•

Slew rate (inverting) 1500 V/

μs

device gain matching is within ±0.42 dB at maximum

•

Supply Current (no load) 11 mA

gain. Furthermore, gain is tested over a wide range.

•

Linear Output Current ±60 mA

The output current feedback Op Amp allows high

•

Output Voltage Swing ±2.2V

frequency large signals (Slew Rate > 1500 V/

μs) and

can also drive a heavy load current (60 mA). Near

•

Input Noise Voltage 4.4 nV/

√Hz

ideal input characteristics (i.e. low input bias current,

•

Input Noise Current 2.6 pA/

√Hz

low offset, low pin 3 resistance) enable the device to

•

THD (20 MHz, RL = 100Ω, VO = 2 VPP) −45 dBc

be easily configured as an inverting amplifier as well

(see Application Information section for details).

•

Replacement for CLC5523

To provide ease of use when working with a single

APPLICATIONS

supply, VG range is set to be from 0V to +2V relative

to the ground pin potential (pin 4). VG input

•

Variable attenuator

impedance is high in order to ease drive requirement.

•

AGC

In single supply operation, the ground pin is tied to a

•

Voltage controlled filter

"virtual" half supply.

•

Video imaging processing

Typical Application

Figure 1. Gain vs. VG

Figure 2. AVMAX = 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.

2

LMH is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.