XR-2211 Datasheet, PDF (14/24 Pages) Exar Corporation – FSK Demodulator/ Tone Decoder

XR-2211
Input
Signal
2
0.1µF
V_CC
Loop 11
Phase
Detect
C₁
2.7nF
5%
VCO
12
14
13
C_O
27nF 5%
R_F 178K
5%
1nF
R₁
35.2K
1% _0.1µF
R₀
20K
1%
VCO
Fine
Rx ^Tune
20K
R_B
8 ^{1.8m 5%}
7
1C0^F%
FSK
Comp.
10
Internal
Reference
R_L
5.1K
5%
Data
Output
Quad
Phase
Detect
6
+
LDOQ
LDOQN
Lock ⁵
Detect
Comp.
Figure 10. Circuit Connection for FSK Decoding of Caller Identification Signals
(Bell 202 Format)
Input
Signal
2
0.1µF
Loop ¹¹
Phase
Detect
C₁
12
VCO
14
13
C₀
R_B
R_F
8
C_F
R₁
10
0.1µF
R₀
7
+
FSK
Comp.
Internal
Reference
Rx
V_CC
R_L
5.1k
Quad
Phase
Detect
Between 400K and 600K
3
R_D
C_D
6 _LDOQ
Lock ^{5 LDOQN}
Detect
Comp.
Rev. 3.01
Figure 11. External Connectors for FSK Demodulation with Carrier
Detect Capability
14