DS04-13106-2E
FUJITSU SEMICONDUCTOR
DATA SHEET
Linear IC Converter
CMOS
A/D Converter
(With 24-Channel Input at 10-bit Resolution)
MB88111
s
DESCRIPTION
The MB88111 is an analog-to-digital converter that converts its analog input to a 10-bit digital value and outputs it
as serial data.
The MB88111 employs a successive approximation method for A/D conversion. It has 24 input channels to be A/
D converted selectively by setting in an internal register.
Since the MB88111 can input and output 16-bit serial data in synchronization with the clock, it can be easily
connected to the serial I/O port in a 16-bit microcontroller.
s
FEATURES
· 24-channel analog input
· RC-type successive approximation system with a sample-and-hole circuit
· 10-bit resolution
· Conversion speed within 50
µ
s (at a system clock rate of 1 MHz)
· Digitally converted data output from the MSB
· Digitally converted data output as 16-bit serial data
· Clock-synchronous serial transfer system
· Internal extended serial interface
· Capable of triggering A/D conversion through an external pin
· Capable of input through an 8-channel port
· Serial data output format selectable using an external pin
· 10-bit monotonicity
· No missing code
· Power supply voltage ranging from 3.5 to 5.5 V
(Continued)
s
PACKAGES
(DIP-48P-M01)
48 pin, Plastic SH-DIP
44-pin, Plastic QFP
(FPT-44P-M11)
2
MB88111
(Continued)
· Operating temperature ranging from 40 to +50
°
C
· CMOS process
· Package options of 44-pin QFP and 48-pin SH-DIP
s
PIN ASSIGNMENT
(Continued)
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
AVRH
AV
CC
V
CC
AN19
AN20
AN21
AN22
AN23
AGND
AVRL
V
SS
TESTI
N.C.
MOD
RSTX
SCK
CCLK
SIN
ESIN
SOT
ENDC
IRQX
ATGX
CS2X
CS1
AN8
AN9
AN10
AN11
AN12
AN13
AN14
AN15
AN16
AN17
AN18
(Top view)
INDEX
(FPT-44P-M11)
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
4
MB88111
s
PIN DESCRIPTION
(Continued)
Pin no.
Symbol
I/O
Circuit type
Descriptions
QFP
DIP
41 to 26
2 to 1,
48 to 43,
41 to 34
AN0 to AN15
I
F
Analog input pins. The pin to be subject to conversion
is selected by the command input through the SIN pin.
Also, a series of pins from AN16 to AN23 can be used
as a port input.
25 to 18 33 to 31,
29 to 25
AN16 to
AN23
G
12
19
MOD
I
A
Pin for selecting a serial data output mode:
"L": Mode A for output from the SOT pin in
synchronization with the fall of the SCK signal.
"H": Mode B for output from the SOT pin in
synchronization with the rise of the SCK signal.
11
10
17
16
CS1
CS2X
I
A
Input pins for selecting an extended serial interface
mode.
Setting the CS1 level to "H" and the CS2X level to "L"
enables A/D converted data transfer. Setting the CS1
level to "L" or the CS2X level to "H" clears the register
command without affecting A/D conversion. Serial
data input to the external extended serial input pin
ESIN is output to the SOT pin as it is. (See Section 7
"Extended Serial Interface" in "
s
OPERATION.")
4
10
SIN
I
B
Serial data input pin
This pin is a hysteresis input with a filter.
6
12
SOT
O
H
Serial data output pin
3
9
CCLK
I
B
System clock input pin
This pin is a hysteresis input.
2
8
SCK
I
B
Serial data transfer clock input pin
This pin is a hysteresis input with a filter.
9
15
ATGX
I
C
External trigger input pin. This pin incorporates a pull-
up resistor. The ATC command initiates A/D conversion
at the rise of the signal at this pin.
The pin is a hysteresis input.
8
14
IRQX
O
H
A/D conversion interrupt signal input pin. The signal
level becomes "L" upon completion of A/D conversion;
it becomes "H" upon reception of data to be converted.
7
13
ENDC
O
H
A/D conversion completion signal output pin. The
signal level becomes "H" upon completion of A/D
conversion; it becomes "L" upon reception of data to be
converted.
5
11
ESIN
I
A
Serial input extension input pin. When the CS1 level is
"L" or the CS2X level is "H," data input to the ESIN pin
is output to the SOT pin as it is.
1
7
RSTX
I
D
Reset signal input pin. This pin incorporates a pull-up
resistor. Setting the signal level to "L" initializes the
internal circuit of the device.
This pin is a hysteresis input with a filter.
5
MB88111
(Continued)
s
I/O CIRCUIT TYPE
(Continued)
Pin no.
Symbol
I/O
Circuit type
Descriptions
QFP
DIP
14
21
TESTI
I
E
Test input pin. This pin incorporates a pull-down
resistor. Maintain the pin at "L" level during normal
use.
44
5
V
CC
--
--
Digital circuit power supply pin
15
22
V
SS
--
--
Digital circuit ground pin
43
4
AV
CC
--
--
Analog circuit power supply pin
17
24
AGND
--
--
Analog circuit ground pin
42
3
AVRH
--
--
Reference (high) voltage input pin
16
23
AVRL
--
--
Reference (low) voltage input pin
13
6, 18,
20, 30,
42
N.C.
--
--
Non-connection pin
Type
Circuit
Remarks
A
· CMOS input
B
· Hysteresis input
· CMOS input
C
· Input with pull-up resistor
· CMOS input
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