5

LNA Input 50

Ω VSWR with Match Network

High Gain Mode

-

-

2.0:1

-

Low Gain Mode

-

-

2.0:1

-

LO VSWR (Direct)

LO = Single End

-

-

2.0:1

-

Differential IF Output Load

Shared with TX

-

200

-

Ω

IF Output Capacitance (Single Ended)

-

1.2

-

pF

IF Output Resistance (Single Ended)

-

5.5

-

k

Ω

LO to LNA Input Feedthrough (Cascaded, no Filter)

-

-65

-50

dBm

Gain Switching Speed at Full Scale - High to Low

±1dB settling

-

0.03

0.1

µs

Gain Switching Speed at Full Scale - Low to High

±1dB settling

-

0.25

0.3

µs

Image Rejection (Cascaded, No Filter)

With Matching Network

-

14

-

dB

F = 374MHz, LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

RF Frequency Range

2400

-

2500

MHz

IF Frequency Range

280

374

600

MHz

LO Frequency Range

1800

-

2220

MHz

Power Conversion Gain

200

Ω In, 50Ω Out

21

25

29

dB

SSB Noise Figure

-10

15

dB

Output IP3

+12

+14

-

dBm

Output P1dB

+2.8

+4

-

dBm

LO Input Drive Level

Same as RX

-10

-6

0

dBm

LO to Transmit Amp. Output Feedthrough (Cascaded, No

Filter)

-

-25

-

dBm

Preamplifier Output 50

Ω VSWR

-

-

3.0:1

-

LO 50

Ω VSWR

LO = Single End

-

1.4:1

2.0:1

-

Differential IF Input Load

Shared with RX

-

200

-

Ω

IF Input Capacitance (Single Ended)

-

1.1

-

pF

IF Input Resistance (Single Ended)

-

0.7

-

k

Ω

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Operating LO Frequency (32/33 Prescaler)

1800

-

2220

MHz

Operating LO Frequency (64/65 Prescaler)

1800

-

3500

MHz

Reference Oscillator Frequency

-

-

50

MHz

Selectable Prescaler Ratios (P)

32/33

-

64/65

-

Swallow Counter Divide Ratio (A Counter)

0

-

127

-

Programmable Counter Divide Ratio (B Counter)

3

-

2047

-

Reference Counter Divide Ratio (R Counter)

3

-

32767

-

Reference Oscillator Sensitivity, Single or Differential

Sine Inputs

0.5

-

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL3685