500 MHz to 1700 MHz Balanced Mixer,

LO Buffer, IF Amplifier, and RF Balun

ADL5357

Rev. 0

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FEATURES

RF frequency range of 500 MHz to 1700 MHz

IF frequency range of 30 MHz to 450 MHz

Power conversion gain: 8.6 dB

SSB noise figure of 9.1 dB

SSB noise figure with 5 dBm blocker of 19.5 dB

Input IP3 of 26.6 dBm

Input P1dB of 10.2 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 ADL5357 uses a highly linear, doubly balanced passive

mixer core along with integrated RF and LO balancing circuitry

to allow for single-ended operation. The ADL5357 incorporates

an RF balun, allowing for optimal performance over a 500 MHz to

1700 MHz RF input frequency range using high-side LO injection

for RF frequencies from 500 MHz to 1200 MHz and low-side

injection for frequencies from 900 MHz to 1700 MHz. The

balanced passive mixer arrangement provides good LO-to-RF

leakage, typically better than −46 dBm, and excellent inter-

modulation 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 8.6 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

ADL5357

NC = NO CONNECT

11

Figure 1.

The ADL5357 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

ADL5357 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 ADL5357 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.

Table 1. Passive Mixers

RF Frequency

(MHz)

Single

Mixer

Single Mixer +

IF Amp

Dual Mixer +

IF Amp

500 to 1700

ADL5357

1200 to 2500

ADL5355