
– 25 –
CXP88852/88860
Voltage gain
1
,
2
LPF cut-off
frequency
1
,
2
Offset voltage
2
Comparator level
2
Input resistance
Charge switch ON
resistance
Item
Symbol
Pin
Conditions
Min.
Typ.
Max.
Unit
dB
dB
dB
dB
kHz
mV
mV
0
-p
mV
0
-p
mV
0
-p
mV
0
-p
mV
0
-p
mV
0
-
p
k
(3) CTL 2nd amplifier characteristics
(Ta = –20 to +75°C, V
DD
= AMPV
DD
= 5.0V, Vss = AMPV
SS
= 0V, CTLAG reference)
Gain = 5dB
Gain = 11dB
Gain = 16dB
Gain = 20dB
f
DC
– 3dB
CTLSAMPI = open
Comparator level = +100mV
0
-p
Comparator level = +250mV
0
-p
Comparator level = +400mV
0
-p
Comparator level =
–
100mV
0
-p
Comparator level =
–
250mV
0
-p
Comparator level =
–
400mV
0
-p
Charge switch OFF
CTLSAMPI = +0.2V
Charge switch ON
CTLSAMPI = +0.5V
A
VCTL2
f
CCTL
V
OSCTL2
V
CCTL
R
INCTL2
R
CCTL2
CTLSAMPI
4.8
10.4
15.3
19.3
15.0
–50
70.0
215
370
–70.0
–220
–370
10.0
5.8
11.5
16.5
20.5
25.0
0
100
245
400
–100
–250
–400
18.0
770
6.8
12.6
17.7
21.7
40.0
+50
130
275
430
–130
–280
–430
1140
1
When the signal is input with the AC coupling capacitor (47μF) connected to CTLSAMPI pin.
2
The result after measuring the output waveform of amplifier internal low-pass filter or voltage value.
Voltage gain
1
Input amplitude
(peak value)
Input sensitivity
Input dead band
Item
Symbol
Pin
Conditions
Min.
Typ.
Max.
Unit
dB
mV
0
-p
mV
0
-p
mV
0
-p
(4) CTLAMP characteristics (1st amplifier + 2nd amplifier)
(Ta = –20 to +75°C, V
DD
= AMPV
DD
= 5.0V, Vss = AMPV
SS
= 0V reference)
CTL 1st amplifier gain = 16dB
CTL 2nd amplifier gain = 20dB
RECCTL (–) = 0V
RECCTL (–) = 0V
CTL 1st amplifier gain = 58dB
CTL 2nd amplifier gain = 20dB
Comparator level = +400mV
0
-p
–400mV
0
-p
RECCTL (–) = 0V
A
VCTL
V
PKCTL
V
SCTL
V
NSCTL
RECCTL (+)
31.8
0.015
35.0
0.08
0.04
38.2
±300
0.10
1
As for other combinations of the amplifier gains, CTL 1st amplifier and CTL 2nd amplifier are added
respectively.
Note)
The result when the signal is input from RECCTL (+) pin with CTL 1st amplifier + CTL 2nd amplifier after
performing AC coupling of CTLCIN (+), CTLAMP (+) pins and CTLCIN (–), CTLAMP (–) pins, and
CTLFAMPO, CTLSAMPI pins.