Wide Dynamic Range, High Speed,

Digitally Controlled VGA

Data Sheet

ADL5202

Rev. 0

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FEATURES

Dual independent, digitally controlled VGAs

−11.5 dB to +20 dB gain range

0.5 dB

± 0.1 dB step size

150 Ω differential input and output

7.5 dB noise figure at maximum gain

OIP3 > 50 dBm at 200 MHz

−3 dB upper frequency bandwidth of 700 MHz

Multiple control interface options

Parallel 6-bit control interface (with latch)

Serial peripheral interface (SPI) (with fast attack)

Gain up/down mode

Wide input dynamic range

Low power mode option

Power-down control

Single 5 V supply operation

40-lead, 6 mm × 6 mm LFCSP package

APPLICATIONS

Differential ADC drivers

High IF sampling receivers

High output power IF amplification

Instrumentation

FUNCTIONAL BLOCK DIAGRAM

+20dB

GND

VPOS

VINA+

VINA–

0dB TO 31.5dB

150Ω

150Ω

150Ω

150Ω

SIDE A

SPI WITH FA,

PARALLEL WITH LATCH,

UP/DN

SIDE B

SPI WITH FA,

PARALLEL WITH LATCH,

UP/DN

VOUTA+

VOUTA–

ADL5202

PM

MODE0,

MODE1

+20dB

VINB+

VINB–

VOUTB+

VOUTB–

0dB TO 31.5dB

LOGIC

LOGIC

CONTROL

CIRCUITRY

PWUPA

PWUPB

Figure 1.

GENERAL DESCRIPTION

The ADL5202 is a digitally controlled, variable gain, wide band-

width amplifier that provides precise gain control, high output

IP3, and low noise figure. The excellent distortion performance

and high signal bandwidth make the ADL5202 an excellent gain

control device for a variety of receiver applications. The

ADL5202 also incorporates a low power mode option that

lowers the supply current.

For wide input dynamic range applications, the ADL5202

provides a broad 31.5 dB gain range with 0.5 dB resolution. The

gain is adjustable through multiple gain control interface options:

parallel, serial peripheral interface, and up/down.

Incorporating proprietary distortion cancellation techniques,

the ADL5202 achieves a better than 50 dBm output IP3 at

frequencies approaching 200 MHz for most gain settings.

The ADL5202 is powered on by applying the appropriate logic

level to the PWUPx pins. The quiescent current of the ADL5202

is typically 160 mA in low power mode. When configured in high

performance mode for more demanding applications, the quiescent

current is 210 mA. When powered down, the ADL5202 consumes

less than 14 mA and offers excellent input-to-output isolation.

The gain setting is preserved during power-down.

Fabricated on an Analog Devices, Inc., high speed SiGe process,

the ADL5202 provides precise gain adjustment capabilities with

good distortion performance and low phase error. The ADL5202

amplifier comes in a compact, thermally enhanced 40-lead,

6 mm × 6 mm LFCSP package and operates over a temperature

range of −40°C to +85°C.