mc13145fta Lansdale Semiconductor, Inc., mc13145fta Datasheet - Page 8

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

ML13145
Page 8 of 17
18, 26
Pin
21
26
27
28
22
23
24
25
29
30
31
Symbol/Type
Collector
Lin Adj2
Mxr2 In
Enable
Emitter
Base
V CC
V CC
V EE
IF1+
IF1–
V EE
Collector
Lin Adj2
Mxr2 In
Enable
Emitter
18, 26
Base
IF1+
IF1–
V CC
V EE
V EE
21
27
26
28
25
24
23
22
29
30
8
10 k
Description
www.lansdale.com
31, V CC
2.0 mA
450 µ
450 µA
500 µA
Enable
Enable the receiver by pulling the pin up to V CC .
V EE , Negative Supply
V EE supply for the mixer IF output.
1st Mixer Outputs
The Mixer is a differential open collector output
configuration which is designed to use over a wide
frequency range. The differential output of the mixer
has back to back diodes across them to limit the
out ut voltage swing and to revent ulling of the
out ut voltage swing and to revent ulling of the
VCO. Differential to single–ended circuit
configuration and matching options are shown in
the Test Circuit. Additional mixer gain can be
achieved by matching the outputs for the desired
passband Q.
On–board VCO Transistor
The transistor has the emitter, base, collector, VCC,
and VEE pins available. Internal biasing which is
compensated for stability over temperature is
provided. It is recommended that the base pin is
pulled up to VCC through an RFC chosen for the
particular oscillator center frequency
particular oscillator center frequency .
V CC , Positive Supply Voltage
A VCC pin is provided for the VCO. The operating
supply voltage range is from 2.7 Vdc to 6.5 Vdc.
V EE , Negative Supply Voltage
2nd Mixer Linearity Control
The mixer linearity control circuit accepts
approximately 0 to 400 µA control current to set the
dynamic range of the mixer. An Input Third Order
Intercept Point, IIP3 of 17 dBm may be achieved at
400 µA of control current. IIP3 default with no
external bias is 10 dBm.
2nd Mixer Input
The mixer input impedance is broadband 50 Ω.
V CC , Positive Supply
p
Description
LANSDALE Semiconductor, Inc.
p
p
Issue 0