MB4053 Fujitsu Microelectronics, Inc., MB4053 Datasheet - Page 3

• Manufacturer Part Number: MB4053
• Description: 6-channel 8-bit A/D Converter
• Manufacturer: Fujitsu Microelectronics, Inc.

Pin no.
9 to 13
PIN DESCRIPTION
15
16
14
1
2
3
7
4
8
6
5
Analog
input
Channel
selection
input
RAMP
START
signal
input
RAMP
STOP
signal
output
Ramp
capacitor
pin
Reference
voltage
supply pin
Reference
resistance
pin
Power
supply
Ground
Pin name
RAMP START A/D conversion start signal input. RAMP START (1
RAMP STOP Indicates that C
Symbol
I
1
GND
V
R
thru I
V
C
A
A
A
REF
REF
CC
0
1
2
H
6
Analog inputs for the six channels. One of the 6 is selected by a specific
bit pattern on A
Input for selecting an analog input channel. Either GND, one of
channels I
inputs.
Ramp time start signal input. RAMP START (0
RAMP STOP (0
comparator reference voltage). RAMP STOP (0
Pin for externally connecting the ramp capacitor. The value of C
conjunction with V
Reference voltage supply pin.
This is the reference voltage source for determining the discharge
current and the analog reference voltage for full-scale factor correction.
When the channel selection input is set 111, this pin is selected for
channel conversion. The full-scale factor is corrected using the
conversion results.
The voltage at this pin must be set to (GND + 2 V) to (V
5.25 V or less.
Pin for external reference resistance for setting the discharge current.
The external resistance is connected between the power source pin
(V
then, I
Power supply pin
Ground pin
This pin is grounded. When the channel selection input is set to 000,
this terminal is selected for channel conversion. The zero offset is
corrected using the conversion results.
CC
) and the reference resistance pin (R
R
= (V
1
to I
CC
– V
6
0
H
or V
to A
is charged over comparator reference voltage V
REF
REF
1) A/D conversion end signal (C
REF
2
)/R
.
and R
is selected by a specific bit pattern on the 3
REF
.
REF
Function
establishes the ramp time.
REF
). The discharge current is,
1)
1)
H
discharged to
0)
MB4053
CC
– 2 V) and
H
BE2
in
.
3