Datasheet

MAX154/MAX158
CMOS High-Speed 8-Bit ADCs with
Multiplexer and Reference
_______________________________________________________________________________________ 5
Reference Output (2.5V) for MAX154REF OUT5
Three-State Data Output, bit 0 (LSB)DBO6
Three-State Data Output, bit 1DB17
Analog Input Channel 1AIN14
Analog Input Channel 2AIN23
Analog Input Channel 3AIN32
Analog Input Channel 4AIN41
_____________________________________________________________Pin Descriptions
Three-State Data Output, bit 2DB28
Three-State Data Output, bit 3DB39
Read Input. RD controls conversions and
data access. See Digital Interface section.
RD10
Three-State Data Output, bit 7 (MSB)DB720
GroundGND12
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.
INT11
Chip-Select Input. CS must be low for
the device to be selected.
CS16
Three-State Data Output, bit 4DB417
Three-State Data Output, bit 5DB518
Three-State Data Output, bit 6DB619
Interrupt Output. INTgoing low indi-
cates the completion of a conversion.
See Digital Interface section.
INT13
GroundGND14
Analog Input Channel 2AIN25
Analog Input Channel 1AIN16
Reference Output (2.5V) for MAX158 REF OUT7
Analog Input Channel 3AIN34
Analog Input Channel 4AIN43
Analog Input Channel 5AIN52
Analog Input Channel 6AIN61
Three-State Data Output, bit 0 (LSB)DB08
Three-State Data Output, bit 1DB19
Three-State Data Output, bit 2DB210
Three-State Data Output, bit 3DB311
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.
RD12
Ready Output. Open-drain output with
no active pull-up device. Goes low
when CSgoes low and high imped-
ance at the end of a conversion.
RDY17
Power-Supply Voltage, +5VV
DD
26
Channel Address 2 InputA223
Channel Address 1 InputA124
Channel Address 0 InputA025
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.
RDY15
Power-Supply Voltage, +5VV
DD
24
Channel Address 1 InputA121
Channel Address 0 InputA022
No ConnectNC23
Three-State Data Output, bit 7 (MSB)DB722
Chip-Select input.
–
CS must be low for
the device to be selected.
CS18
Three-State Data Output, bit 4DB419
Three-State Data Output, bit 5DB520
Three-State Data Output, bit 6DB621
Analog Input Channel 8AIN827
Analog Input Channel 7AIN728
Upper Limit of Reference Span. Sets
the full-scale input voltage.
Range: V
REF
- to V
DD
.
V
REF
+16
PIN
MAX154
FUNCTIONNAME
PIN
MAX158
FUNCTIONNAME