RFRXD0420 Datasheet, PDF (8/32 Pages) Microchip Technology – UHF ASK/FSK/FM Receiver

rfRXD0420/0920
FIGURE 2-11: BLOCK DIAGRAM OF
DEMODULATOR OUTPTUT
PINS
VDD
DEM OUT+
23
VSS
VDD
50 Ω
20 µA
VSS
DEM OUT-
24
VSS
50 Ω
20 µA
VSS
20 µA
VSS
20 µA
VSS
2.7 Operational Amplifier
The internal operational amplifier (OPA) can be
configured as a comparator for ASK or FSK or as a filter
for FM modulation applications.
The Op Amp pins are illustrated in Figures 2-12 and
2-13.
FIGURE 2-12: BLOCK DIAGRAM OF OP AMP
INPUT PINS
VDD
OPA-
19
50 Ω
VDD
20 µA
VDD
50 Ω
OPA+
20
VSS
VSS
FIGURE 2-13: BLOCK DIAGRAM OF OP AMP
OUTPUT PIN
VDD
VDD
OPA
18
50 Ω
VSS
VSS
DS70090A-page 8
Preliminary
 2003 Microchip Technology Inc.