M16C6S_09 Datasheet, PDF (187/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
IT800AFE (Analog Front End)
(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.
3.3V
10k
0.1µF
10k
Pre-InP
Input filter
Pre-InN
Vref
M16C/6S
Amplifier
Buffer
Pre_BOut
Figure 1.23.3 Consists of Preamp circuit
Table 1.23.2 Preamp Electrical Characteristics (Ta = 25°C unless otherwise specified)
Parameter
Standard voltage
Input off-set voltage
Open loop gain
Gain band width
Common mode input range
Common mode rejection ratio
Power supply rejection ratio
Symbol Condition
Vdd
Vof
GVO
BW
CMIR
CMRR
PSRR
No-load
GVO=0dB
DC to 1MHz
DC to 1MHz
DC to 1MHz
Electrical Characteristics
Min
Typ
Max
3.0
3.3
3.6
15
70
5
0.7
Vdd-0.7
40
30
Unit
V
mV
dB
MHz
V
dB
dB
Rev.5.01 Dec 10, 2009 page 187 of 201
REJ03B0014-0501