+2.375V, Low-Power, 8-Channel,

Serial 12-Bit ADC

______________________________________________________________________________________

15

POWERED UP

HARDWARE

POWER-

DOWN

POWERED UP

POWERED UP

12 DATA BITS

12 DATA BITS

INVALID

DATA

VALID

DATA

EXTERNAL

EXTERNAL

SX XXXX 11

S

0 0

XX

X

X

X

X X XXX

S1 1

SOFTWARE

POWER-DOWN

MODE

DOUT

DIN

CLOCK

MODE

SHDN

SETS EXTERNAL

CLOCK MODE

SETS EXTERNAL

CLOCK MODE

SETS SOFTWARE

POWER-DOWN

SOFTWARE

POWER-DOWN

POWERED UP

POWERED UP

DATA VALID

DATA VALID

INTERNAL

SX XXXX 10

S

0 0

XX

X

X

X

S

MODE

DOUT

DIN

CLOCK

MODE

SETS INTERNAL

CLOCK MODE

SETS

POWER-DOWN

CONVERSION

CONVERSION

SSTRB

Figure 12a. Timing Diagram Power-Down Modes, External Clock

Figure 12b. Timing Diagram Power-Down Modes, Internal Clock

PD1

PD0

DEVICE MODE

1

1

External Clock

1

0

Internal Clock

0

1

Unassigned

0

0

Power-Down

SHDN

DEVICE

INTERNAL CLOCK

STATE

MODE

FREQUENCY

1

Enabled

225kHz

Floating

Enabled

1.5MHz

0

Power-Down

N/A

Table 4. Software Power-Down and

Clock Mode

Table 5. Hard-Wired Power-Down and

Internal Clock Frequency