Rainbow Electronics MAX158 - Manual (Page 5)

MAX154/MAX158
CMOS High-Speed 8-Bit ADCs with
Multiplexer and Reference
_______________________________________________________________________________________ 5
Reference Output (2.5V) for MAX154 REF OUT 5
Three-State Data Output, bit 0 (LSB) DBO 6
Three-State Data Output, bit 1 DB1 7
Analog Input Channel 1 AIN1 4
Analog Input Channel 2 AIN2 3
Analog Input Channel 3 AIN3 2
Analog Input Channel 4 AIN4 1
_____________________________________________________________Pin Descriptions
Three-State Data Output, bit 2 DB2 8
Three-State Data Output, bit 3 DB3 9
Read Input. RD controls conversions and
data access. See
Digital Interface section.
RD 10
Three-State Data Output, bit 7 (MSB) DB7 20
Ground GND 12
Lower Limit of Reference Span. Sets
the zero-code voltage.
Range: GND to V
REF +.
V REF - 13
Interrupt Output. INT going low indi-
cates the completion of a conversion.
See
Digital Interface section.
INT 11
Chip-Select Input. CS must be low for
the device to be selected.
CS 16
Three-State Data Output, bit 4 DB4 17
Three-State Data Output, bit 5 DB5 18
Three-State Data Output, bit 6 DB6 19
Interrupt Output. INT going low indi-
cates the completion of a conversion.
See
Digital Interface section.
INT 13
Ground GND 14
Analog Input Channel 2 AIN2 5
Analog Input Channel 1 AIN1 6
Reference Output (2.5V) for MAX158 REF OUT 7
Analog Input Channel 3 AIN3 4
Analog Input Channel 4 AIN4 3
Analog Input Channel 5 AIN5 2
Analog Input Channel 6 AIN6 1
Three-State Data Output, bit 0 (LSB) DB0 8
Three-State Data Output, bit 1 DB1 9
Three-State Data Output, bit 2 DB2 10
Three-State Data Output, bit 3 DB3 11
Lower Limit of Reference Span. Sets
the zero-code voltage.
Range: GND to V
REF +.
V REF - 15
Read Input. RD controls conversions
and data access.
See
Digital Interface section.
RD 12
Ready Output. Open-drain output with
no active pull-up device. Goes low
when CS goes low and high imped-
ance at the end of a conversion.
RDY 17
Power-Supply Voltage, +5V V DD 26
Channel Address 2 Input A2 23
Channel Address 1 Input A1 24
Channel Address 0 Input A0 25
Upper Limit of Reference Span. Sets
the full-scale input voltage.
Range: V
REF - to V DD .
V REF + 14
Ready Output. Open-drain output with
no active pull-up device. Goes low
when CS goes low and high imped-
ance at the end of a conversion.
RDY 15
Power-Supply Voltage, +5V V DD 24
Channel Address 1 Input A1 21
Channel Address 0 Input A0 22
No Connect NC 23
Three-State Data Output, bit 7 (MSB) DB7 22
Chip-Select input.
–
CS must be low for
the device to be selected.
CS 18
Three-State Data Output, bit 4 DB4 19
Three-State Data Output, bit 5 DB5 20
Three-State Data Output, bit 6 DB6 21
Analog Input Channel 8 AIN8 27
Analog Input Channel 7 AIN7 28
Upper Limit of Reference Span. Sets
the full-scale input voltage.
Range: V
REF - to V DD .
V REF + 16
PIN
MAX154
FUNCTION NAME
PIN
MAX158
FUNCTION NAME