mc13145fta Lansdale Semiconductor, Inc., mc13145fta Datasheet - Page 9

• Manufacturer Part Number: mc13145fta
• Description: Uhf Wideband Receiver Subsystem Lna, Mixer, Vco, Prescaler, If Subsystem, Coiless Detector
• Manufacturer: Lansdale Semiconductor, Inc.

LANSDALE Semiconductor, Inc.
Page 9 of 17
32, 34
39, 40
Pin
33
35
36
37
38
41
42
7
Symbol/Type
IF Dec1,
IF Dec2
IF Out
RSSI
V CC
V EE
IF2+
IF2–
V EE
IF In
LO2
See Figure 4.
V EE
IF2+
LO2
V EE
IF2–
33
32
35
34
36
V CC
390 µA
Description
LO Out+
LO Out–
www.lansdale.com
(to Mxr2)
V EE , Negative Supply Voltage
2nd Local Oscillator
The 2nd LO input impedance is broadband 50 Ω; it
is driven from an external 50 Ω source. Typical level
is –15 to –10 dBm.
2nd Mixer Outputs
The Mixer is a differential open collector
configuration.
V EE , Negative Supply Voltage
IF Amplifier Input
IF amplifier input source impedance is 330 Ω.. The
three stage amplifier has 40 dB of gain with 3.0 dB
bandwidth of 40 MHz.
IF Decoupling
These pins are decoupled to V CC to provide stable
operation of the limiting IF amplifier.
IF Amplifier Output
IF amplifier output load impedance is 330 Ω.
V CC , Positive Supply Voltage
RSSI
The RSSI circuitry in the 2nd & 3rd amplifier stages
outputs a current when the output of the previous
stage enters limiting. The net result is a RSSI
current which represents the logarithm of the IF
input voltage. An external resistor to ground is used
to provide a voltage output.
Description
ML13145
Issue 0