50

100

150

200

250

300

0

10

20

30

40

50

60

5

10

15

20

25

30

35

FILTER INPUT RESISTANCE ( )

f = 200MHz

VOUT = 2VPPD

@ filter input

SVA-30206581

LMH6523

www.ti.com

SNOSC88 – DECEMBER 2012

High Performance Quad DVGA

Check for Samples: LMH6523

Each channel of LMH6523 has an independent,

1

FEATURES

digitally controlled attenuator and a high linearity,

2

•

OIP3: 49dBm at 200MHz

differential output, amplifier. All circuitry has been

•

Noise Figure: 8.5dB

optimized for low distortion and maximum system

design flexibility. Power consumption is managed by

•

Voltage Gain: 26dB

a three-state enable pin. Individual channels can be

•

1dB Gain Steps

disabled or placed into a Low Power Mode or a

•

Enable Pins Active in SPI Mode

higher performance, High Power Mode. The enable

pin is active in both serial and parallel modes for

•

−3dB Bandwidth of 1400 MHz

systems that require high speed power control.

•

Gain Step Accuracy: 0.2 dB

The LMH6523 digitally controlled attenuator provides

•

Disable Function for Each Channel

precise 1dB gain steps over a 31dB range. The digital

•

Parallel and Serial Gain Control

attenuator can be controlled by either a SPI™ Serial

•

Low Power Mode for Power Management

bus or a high speed parallel bus.

Flexibility

The output amplifier has a differential output, allowing

•

Small Footprint WQFN Package

large signal swings on a single 5V supply. The low

impedance output provides maximum flexibility when

APPLICATIONS

driving a wide range filter designs or analog to digital

converters. For applications which have very large

•

Cellular Base Stations

changes in signal level LMH6523 can support up to

•

Wideband and Narrowband IF Sampling

62dB of gain range by cascading channels.

Receivers

The

LMH6523

operates

over

the

industrial

•

Wideband Direct Conversion

temperature range of

−40°C to 85°C. The LMH6523

•

ADC Driver

is available in a 54-Pin, thermally enhanced, WQFN

package.

DESCRIPTION

PERFORMANCE CURVE

The LMH6523 contains four, high performance,

digitally controlled variable gain amplifiers (DVGA). It

has been designed for use in narrowband and

broadband IF sampling applications. Typically, the

LMH6523 drives a high performance ADC in a broad

range of mixed signal and digital communication

applications such as mobile radio and cellular base

stations where automatic gain control (AGC) is

required to increase system dynamic range.

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

SPI is a trademark of Motorola, Inc.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, 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.