LT5502 datasheet(5/8 Pages) LINER

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LT5504

5504i

5504 G12

100ns/DIV

VOUT

1V/DIV

PULSED

900MHz

0dBm

1V/DIV

Output Voltage and Slope Variation

vs RF Input Power and Temperature

Output Voltage and Slope Variation

vs RF Input Power and Temperature

PI FU CTIO S

BLOCK DIAGRA

TYPICAL PERFOR A CE CHARACTERISTICS

Output Response Time

VCC (Pins 1, 8 ): Power Supply Pins. These pins must be

tied together at the part as close as possible, and should

be decoupled using 1000pF capacitors.

RF+ (Pin 2): Positive RF Input Pin.

RF– (Pin 3): Negative RF Input Pin.

GND (Pin 4): Ground Pin.

EN (Pin 5): Enable Pin. The on/off threshold voltage

is about VCC/2. When the input voltage is higher than

0.6 • VCC, the circuit is completely turned on. When the

input voltage is less than 0.4 • VCC, the circuit is turned off.

LO (Pin 6): Local Oscillator Input Pin.

VOUT (Pin 7): Output Pin.

5504 BD

DET

• • •

BUFFER

LIMITER

LIMITING

MIXER

LPF

RF+

RF–

GND

VCC

VOUT

ENABLE

PIN (dBm)

–80 –70 –60 –50 –40 –30 –20 –10

2.4

2.0

1.6

1.2

0.8

0.4

5504 G11

fRF = 1.9GHz

fIF = 400MHz

AVERAGE SLOPE: 23mV/dB

TA = –40°C

–2

–4

–6

TA = 25°C

TA = 85°C

TA = 25°C

PIN (dBm)

–80 –70 –60 –50 –40 –30 –20 –10

2.4

2.0

1.6

1.2

0.8

0.4

5504 G10

fRF = 1.9GHz

fIF = 70MHz

AVERAGE SLOPE: 23mV/dB

TA = –40°C

–2

–4

–6

TA = 25°C

TA = 85°C

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