1200 MHz to 2500 MHz Balanced Mixer,

LO Buffer, IF Amplifier, and RF Balun

ADL5355

Rev. 0

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FEATURES

RF frequency range of 1200 MHz to 2500 MHz

IF frequency range of 30 MHz to 450 MHz

Power conversion gain: 8.4 dB

SSB noise figure of 9.2 dB

SSB noise figure with 5 dBm blocker of 20 dB

Input IP3 of 27 dBm

Input P1dB of 10.4 dBm

Typical LO drive of 0 dBm

Single-ended, 50 Ω RF and LO input ports

High isolation SPDT LO input switch

Single-supply operation: 3.3 V to 5 V

Exposed paddle 5 mm × 5 mm, 20-lead LFCSP

1500 V HBM/500 V FICDM ESD performance

APPLICATIONS

Cellular base station receivers

Transmit observation receivers

Radio link downconverters

GENERAL DESCRIPTION

The ADL5355 uses a highly linear, doubly balanced passive

mixer core along with integrated RF and LO balancing circuitry

to allow for single-ended operation. The ADL5355 incorporates

an RF balun, allowing for optimal performance over a 1200 MHz

to 2500 MHz RF input frequency range using low-side LO

injection for RF frequencies from 1700 MHz to 2500 MHz and

high-side LO injection for RF frequencies from 1200 MHz to

1700 MHz. The balanced passive mixer arrangement provides

good LO-to-RF leakage, typically better than −39 dBm, and

excellent intermodulation performance. The balanced mixer

core also provides extremely high input linearity, allowing the

device to be used in demanding cellular applications where in-

band blocking signals may otherwise result in the degradation

of dynamic performance. A high linearity IF buffer amplifier

follows the passive mixer core to yield a typical power conversion

gain of 8.4 dB and can be used with a wide range of output

impedances.

FUNCTIONAL BLOCK DIAGRAM

2

3

1

20

19

18

17

16

6

7

8

9

10

4

5

14

13

15

12

BIAS

GENERATOR

VPIF

RFIN

RFCT

COMM

COMM

LOI2

VPSW

VGS1

VGS0

LOI1

IFGM

IFOP

IFON

PWDN

LEXT

VLO3

LGM3

VLO2

LOSW

NC

ADL5355

NC = NO CONNECT

11

Figure 1.

The ADL5355 provides two switched LO paths that can be

used in TDD applications where it is desirable to rapidly switch

between two local oscillators. LO current can be externally set

using a resistor to minimize dc current commensurate with the

desired level of performance. For low voltage applications, the

ADL5355 is capable of operation at voltages down to 3.3 V with

substantially reduced current. Under low voltage operation, an

additional logic pin is provided to power down (<200 μA) the

circuit when desired.

The ADL5355 is fabricated using a BiCMOS high performance

IC process. The device is available in a 5 mm × 5 mm, 20-lead

LFCSP and operates over a −40°C to +85°C temperature range.

An evaluation board is also available.