ML3371, ML3372
LANSDALE Semiconductor, Inc.
ML3371 PIN FUNCTION DESCRIPTION (continued)
OPERATING CONDITIONS
VCC = 4.0 Vdc, RFIn = 100
µV,
fmod = 1.0 kHz, fdev = 3.0 kHz. ML3371 at f RF = 10.7 MHz (see Figure 11).
Pin
13
Symbol
RSSI
Internal Equivalent
Circuit
VCC
1.8 k
Description
RSSI Output. Referred to as the
Received Signal Strength Indicator or
RSSI. The chip sources up to 60
µA
over the linear 60 dB range. This pin
may be used many ways, such as:
AGC, meter drive and carrier triggered
squelch circuit.
RSSIOut
14
MUTE
14 Mute or
SqOut
Mute Output. See discussion in
application text.
Waveform
Bias
13
40 k
15
Gnd
Gnd
15
Ground. The ground area should be
continuous and unbroken. In a two–
sided layout, the component side has
the ground plane. In a one–sided
layout, the ground plane fills around
the traces on the circuit side of the
board and is not interrupted.
Mixer Input –
Series Input Impedance:
@ 10 MHz: 309 – j33
Ω
@ 45 MHz: 200 – j13
Ω
16
MIXIn
16
MixerIn
3.3 k
VCC
10 k
*Other pins are the same as pins in MC3371.
Page 8 of 19
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