6 GHz Ultrahigh Dynamic Range

Differential Amplifier

Data Sheet

ADL5565

FEATURES

Pin strappable gain adjust: 6 dB, 12 dB, and 15.5 dB

Gain range from 0 dB to 15.5 dB using two external resistors

Differential or single-ended input to differential output

Low noise input stage: NF = 8.7 dB at 15.5 dB gain

10 MHz: −107 dBc (HD2), −110 dBc (HD3)

100 MHz: −108 dBc (HD2), −103 dBc (HD3)

200 MHz: −82 dBc (HD2), −87 dBc (HD3)

500 MHz: −68 dBc (HD2), −63 dBc (HD3)

IMD3 of −112 dBc at 100 MHz center

Slew rate: 11 V/ns

Fast settling and overdrive recovery of 2 ns

Single-supply operation: 2.8 V to 5.2 V

Power down

Fabricated using the high speed XFCB3 SiGe process

APPLICATIONS

Differential ADC drivers

Single-ended-to-differential conversion

RF/IF gain blocks

SAW filter interfacing

FUNCTIONAL BLOCK DIAGRAM

VIP2

ENBL

VCOM

VOP

VIP1

VIN1

VIN2

ADL5565

GND

VCC

VON

Figure 1.

GENERAL DESCRIPTION

The ADL5565 is a high performance differential amplifier

optimized for RF and IF applications. The amplifier offers low

noise of 1.5 nV/√Hz and excellent distortion performance over

a wide frequency range making it an ideal driver for high speed

8-bit to 16-bit analog-to-digital converters (ADCs).

The ADL5565 provides three gain levels of 6 dB, 12 dB, and

15.5 dB through a pin strappable configuration. For the single-

ended input configuration, the gains are reduced to 5.3 dB,

10.3 dB, and 13 dB. Using two external series resistors expands

the gain flexibility of the amplifier and allows for any gain

selection from 0 dB to 15.5 dB for a differential input and 0 dB

to 13 dB for a single-ended input.

The quiescent current of the ADL5565 is typically 70 mA, and

when disabled, consumes less than 5 mA with −25 dB of input-

to-output isolation at 100 MHz.

The device is optimized for wideband, low distortion, and noise

performance, giving it unprecedented performance for overall

spurious-free dynamic range. These attributes, together with its

adjustable gain capability, make this device the amplifier of

choice for driving a wide variety of ADCs, mixers, pin diode

attenuators, SAW filters, and multielement discrete devices.

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

the ADL5565 is supplied in a compact 3 mm × 3 mm, 16-lead

LFCSP package and operates over the −40°C to +85°C

temperature range.

Rev. E

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