MX7824/MX7828
CMOS, High-Speed, 8-Bit ADCs
with Multiplexer
_______________________________________________________________________________________ 5
Reference Output (2.5V) for MAX154.
Test point for MX7824. Do not connect.
REF OUT
TP
5
Three-State Data Output, bit 0 (LSB)DBO6 Three-State Data Output, bit 1DB17
Analog Input Channel 1AIN14 Analog Input Channel 2AIN23
PIN
Analog Input Channel 3AIN32 Analog Input Channel 4AIN41
FUNCTIONNAME
_____________________________________________________________Pin Descriptions
Three-State Data Output, bit 2DB28 Three-State Data Output, bit 3DB39 Read Input. –
R
—
D
–controls conversions
and data access. See
Digital Interface
section.
–
R
—
D
–
10
Three-State Data Output, bit 7 (MSB)DB720
GroundGND12 Lower Limit of Reference Span. Sets
the zero-code voltage.
Range: GND to VREF+.
VREF-13
Interrupt Output. INT going low indi-
cates the completion of a conversion.
See
Digital Interface
section.
INT11
Chip-Select Input. –
C
—
S
–must be low for
the device to be selected.
–
C
—
S
–
16
Three-State Data Output, bit 4DB417 Three-State Data Output, bit 5DB518 Three-State Data Output, bit 6DB619
Interrupt Output. INT going 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.
Test point for MX7828. Do not connect.
REF OUT
TP
7
Analog Input Channel 3AIN34 Analog Input Channel 4AIN43
PIN
Analog Input Channel 5AIN52 Analog Input Channel 6AIN61
FUNCTIONNAME
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 VREF+.
VREF-15
Read Input. –
R
—
D
–controls conversions
and data access. See
Digital Interface
section.
–
R
—
D
–
12
Ready Output. Open-drain output with
no active pull-up device. Goes low
when –
C
—
S
–goes low and high imped-
ance at the end of a conversion.
RDY17
Power-Supply Voltage, +5VVDD
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: VREF- to VDD.
VREF+14
Ready Output. Open-drain output with
no active pull-up device. Goes low
when –
C
—
S
–goes low and high imped-
ance at the end of a conversion.
RDY15
Power-Supply Voltage, +5VVDD
24
Channel Address 1 InputA121 Channel Address 0 InputA022 No ConnectNC23
Three-State Data Output, bit 7 (MSB)DB722
Chip-Select Input. –
C
—
S
–must be low for
the device to be selected.
–
C
—
S
–
18
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: VREF- to VDD.
VREF+16
MAX154
MX7824 MAX158
MX7828