Datasheet

M16C/6S Group IT800AFE (Analog Front End)
R01DS0201EJ0502 Rev.5.02 page 189 of 203
Dec 25, 2012
Figure 1.23.3 Consists of Preamp circuit
0.1 F
3.3V
10k
Vref
M16C/6S
Pre_BOut
10k
Pre-InP
Pre-InN
Input filter
Amplifier
Buffer
G VO =0dB
No-load
DC to 1MHz
DC to 1MHz
DC to 1MHz
Vdd
Vof
G
VO
BW
CMIR
CMRR
PSRR
Standard voltage
Common mode rejection ratio
Power supply rejection ratio
Input off-set voltage
Open loop gain
Gain band width
Common mode input range
MaxTypMin
3.3 3.6
15
70
40
30
5
3.0
0.7 Vdd-0.7
V
dB
dB
mV
V
dB
MHz
ConditionSymbol
Electrical Characteristics
UnitParameter
(2)Receiving circuit
(a)Preamplifier
A preamplifier circuit consists of two CMOS operational amplifiers as shown in Figure 1.23.3, the first
opamp is connected as gain stage with gain of 20dB and the second opamp is connected as a voltage
follower for driving of external filter.
Table 1.23.2 Preamp Electrical Characteristics (Ta = 25°C unless otherwise specified)