MAX148ACAP(1998) Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX148ACAP
(Rev.:1998)

+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs

Maxim Integrated 

+2.7V to +5.25V, Low-Power, 8-Channel,

Serial 10-Bit ADCs

CLOCK

MODE

DIN

DOUT

SETS INTERNAL

CLOCK MODE

SXXXXX10

INTERNAL

SETS

POWER-DOWN

SX X XXX0 0

DATA VALID

SSTRB

MODE

CONVERSION

POWERED UP

CONVERSION

S

DATA VALID

POWER-DOWN

POWERED UP

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

Table 5. Software Power-Down

and Clock Mode

PD1

PD0

0

0

0

1

1

0

1

1

DEVICE MODE

Full Power-Down

Fast Power-Down

Internal Clock

External Clock

Table 6. Hard-Wired Power-Down

and Internal Clock Frequency

SHDN

STATE

DEVICE

MODE

REFERENCE-

INTERNAL

BUFFER

CLOCK

COMPENSATION FREQUENCY

1

Floating

0

Enabled

Enabled

Power-Down

Internal

External

N/A

225kHz

1.8MHz

N/A

10,000

1000

AVERAGE SUPPLY CURRENT

vs. CONVERSION RATE

WITH EXTERNAL REFERENCE

VREF = VDD = 3.0V

RLOAD = ∞

CODE = 1010101000

100

8 CHANNELS

10

1 CHANNEL

1

0.1

0.1 1 10 100 1k 10k 100k 1M

CONVERSION RATE (Hz)

Figure 13. Average Supply Current vs. Conversion Rate with

External Reference

AVERAGE SUPPLY CURRENT

vs. CONVERSION RATE

(USING FULLPD)

100

RLOAD = ∞

CODE = 1010101000

8 CHANNELS

10

1 CHANNEL

1

0.01 0.1

1

10 100 1k

CONVERSION RATE (Hz)

Figure 14a. MAX149 Supply Current vs. Conversion Rate,

FULLPD

16 ______________________________________________________________________________________

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