mc13145fta Lansdale Semiconductor, Inc., mc13145fta Datasheet - Page 7

• 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 7 of 17
13, 15,
11, 12
& 16
Pin
10
14
17
19
20
8
9
Symbol/Type
PRSCout
Lin Adj1
LNAout
LNA In
Mxr 1 In
V CC
V EE
V EE
MC
PRSC Out
LNA out
LinAdj1
Mxr 1 In
15, 16
LNA in
11,12
V CC
V EE
V EE
V CC
V EE
V EE
MC
CC
10
11
17
13
14
20
19
9
8
3
Description
1.0 mA
www.lansdale.com
V CC
V CC
450 µA
2.0 mA
V ref2
V ref1
V EE , Negative Supply Voltage
Prescaler Output
The prescaler output provides typically 500 mVpp
drive to the fin pin of a PLL synthesizer. Conjugately
matching the interface will increase the drive
delivered to the PLL input.
Dual Modulus Control Current Input
This requires a current input of typically 200 µApp.
V CC , Positive Supply
V CC pin is taken to the incoming positive battery or
regulated dc voltage through a low impedance trace
on the PCB. It decoupled to V EE ground at the pin
of the IC.
LNA In
The input is the base of the common emitter
transistor. Minimum external matching is required to
optimize the input return loss and gain.
V EE , Negative Supply
V EE pin is taken to an ample dc ground plane
through a low impedance path. The path should be
kept as short as possible. A minimum two sided
PCB is recommended so that ground returns can
be easily made through via holes.
LNA Out
The output is from the collector of the cascode
transistor amplifier. The output may be conjugately
matched with a shunt L (needed to dc bias the open
collector), and series L and C network.
1st Mixer Input
The mixer input impedance is broadband 50 Ω for
applications up to 2.4 GHz. It easily interfaces with
a RF ceramic filter.
1st Mixer Linearity Control
The mixer linearity control circuit accepts
approximately 0 to 300 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
300 µA of control current.
Description
ML13145
Issue 0