FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-13103-6E
Linear IC
6-Channel 8-BIT A/D Converter
MB4053
s
DESCRIPTION
The Fujitsu MB4053 is 6-channel, 8-bit, single-slope A/D converter subsystem designed to be used in a
microprocessor based data control system.
The MB4053 is single monolithic bipolar IC providing a 1 of 8 address decoder, 8-channel analog multiplier,
sample and hold, constant current generator, ramp integrator and comparator in a 16-pin package.
This A/D converter subsystems are suitable for a wide range of applications. The resolution required by an
application can be obtained by arbitarily selecting a suitable integration time. Also zero offset and full-scale error
corrections can be made automatically (auto-zero and auto-calibration) to minimize conversion error.
s
FEATURES
•
•
•
•
•
•
•
•
•
•
•
Microprocessor compatible
Digital input/output: TTL compatible
Zero offset and full-scale error correction capability
Ratiometric conversion capability
Available in 16-pin DIP and Flat Package
Compatible with MC 14443 and
µA9708
(DIP package)
Single power supply: +4.75 V to +15 V
Excellent Iinearity:
±0.2%
max. error
Fast conversion time: 300
µs/ch
typ.
Analog input volgage: 0 V to V
CC
– 2 V (5.25 V max.)
Power Dissipation: 25 mW typ. at V
CC
= 5 V
s
PACKAGES
16-pin Plastic DIP
16-pin Plastic SOP
(DIP-16P-M04)
(FPT-16P-M06)
MB4053
s
PIN ASSIGNMENT
(Top view)
A
1
A
2
RAMP
START
C
H
GND
R
REF
RAMP
STOP
V
REF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
0
I
1
V
CC
I
2
I
3
I
4
I
5
I
6
(DIP-16P-M04)
(FPT-16P-M06)
2
MB4053
s
PIN DESCRIPTION
Pin no.
9 to 13
15
16
1
2
3
Pin name
Analog
input
Channel
selection
input
RAMP
START
signal
input
RAMP
STOP
signal
output
Ramp
capacitor
pin
Reference
voltage
supply pin
Symbol
I
1
thru I
6
A
0
A
1
A
2
Function
Analog inputs for the six channels. One of the 6 is selected by a specific
bit pattern on A
0
to A
2
.
Input for selecting an analog input channel. Either GND, one of
channels I
1
to I
6
or V
REF
is selected by a specific bit pattern on the 3
inputs.
RAMP START A/D conversion start signal input. RAMP START (1
→
0)
Ramp time start signal input. RAMP START (0
→
1)
7
RAMP STOP Indicates that C
H
is charged over comparator reference voltage V
BE2
.
RAMP STOP (0
→
1) A/D conversion end signal (C
H
discharged to
comparator reference voltage). RAMP STOP (0
→
1)
C
H
Pin for externally connecting the ramp capacitor. The value of C
H
in
conjunction with V
REF
and R
REF
establishes the ramp time.
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
CC
– 2 V) and
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
CC
) and the reference resistance pin (R
REF
). The discharge current is,
then, I
R
= (V
CC
– V
REF
)/R
REF
.
V
CC
GND
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.
4
8
V
REF
6
Reference
resistance
pin
Power
supply
Ground
R
REF
14
5
3
MB4053
s
BLOCK DIAGRAM
V
CC
14
RAMP START
(FROM MPU)
3
SAMPLE/RAMP
AMPLIFIER
I
1
15
I
2
13
I
3
12
ANALOG
INPUT
I
4
11
I
5
10
I
6
9
V
REF
8
+
–
REFERENCE
CURRENT
GENERATOR
COMPARATOR
+
RAMP STOP
(TO MPU)
V
BE1
ANALOG
MULTIPLEXER
7
I
R
–
V
BE2
DECODER
16
1
2
6
R
REF
5
GND
4
C
H
A
0
A
1
A
2
(FROM MPU)
4
MB4053
s
ABSOLUTE MAXIMUM RATINGS
Parameter
Power supply voltage
Digital input voltage
Digital output voltage when off
Analog input voltage
Output current
Storage temperature
Ceramic
Plastic
Symbol
V
CC
V
IND
V
OH
V
INA
I
O
Tstg
Rating
Min.
—
–0.5
–0.5
–0.5
—
–55
–55
Max.
18
+30
+18
+30
10
+150
+125
Unit
V
V
V
V
mA
°C
°C
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
s
RECOMMENDED OPERATING CONDITIONS
Parameter
Power supply voltage
Reference voltage*
Ramp capacity
Reference current
Analog input voltage
Output current
Operating temperature
* : 2 V
≤
V
REF
≤
V
CC
– 2 V
WARNING: Recommended operating conditions are normal operating ranges for the semiconductor device. All
the device’s electrical characteristics are warranted when operated within these ranges.
Always use semiconductor devices within the recommended operating conditions. Operation outside
these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representative beforehand.
Symbol
V
CC
V
REF
C
H
I
R
V
IA
I
O
Ta
Value
Min.
4.75
2.0
300
12
0
—
–40
Typ.
5.0
—
—
—
—
—
—
Max.
15
5.25
—
50
V
REF
1.6
+85
Unit
V
V
pF
µA
V
mA
°C
5
京公网安备 11010802033920号
EEWORLD
