MT8889C
IN+
Data Sheet
C
R
IN
IN-
R
F
GS
V
Ref
VOLTAGE GAIN
(A
V
) = R
F
/ R
IN
MT8889C
Figure 3 - Single-Ended Input Configuration
C1
R1
IN+
IN-
C2
R4
R5
GS
R3
R2
V
Ref
MT8889C
DIFFERENTIAL INPUT AMPLIFIER
C1 = C2 = 10 nF
R1 = R4 = R5 = 100 kΩ
R2 = 60kΩ, R3 = 37.5 kΩ
R3 = (R2R5)/(R2 + R5)
VOLTAGE GAIN
(A
V
diff) - R5/R1
INPUT IMPEDANCE
(Z
IN
diff) = 2 R1
2
+ (1/ωC)
2
Figure 4 - Differential Input Configuration
F
LOW
697
697
697
770
770
770
F
HIGH
1209
1336
1477
1209
1336
1477
DIGIT
1
2
3
4
5
6
D
3
0
0
0
0
0
0
D
2
0
0
0
1
1
1
D
1
0
1
1
0
0
1
D
0
1
0
1
0
1
0
Table 1 - Functional Encode/Decode Table
4
Zarlink Semiconductor Inc.