Rainbow-electronics MAX1081 Manual do Utilizador descarregar pdf (Página 17)

MAX1080/MAX1081

300ksps/400ksps, Single-Supply, Low-Power,

8-Channel, Serial 10-Bit ADCs with Internal Reference

______________________________________________________________________________________ 17

SCLK

11 15885812 12 1216 16 1 516

B4B9S0B4B9S0

DIN

SSTRB

DOUT

CONTROL BYTE 0SSSCONTROL BYTE 1

CONVERSION RESULT 1CONVERSION RESULT 0

CONTROL BYTE 2 S ETC.

B4B9

HIGH-Z

Figure 8. Continuous 16-Clock/Conversion Timing

0.50

0.25

1.00

0.75

1.25

1.50

0.0001 0.010.001 0.1 1 10

TIME IN SHUTDOWN (s)

REFERENCE POWER-UP DELAY (ms)

MAX1081, V

DD1

DD2

3.0V

LOAD

= 20pF

CODE = 1010100000

1000

100

0.1 101 100 1k 10k

SAMPLING RATE (sps)

SUPPLY CURRENT (µA)

8 CHANNELS

1 CHANNEL

10,000

1000

100

1 10010 1k 10k 100k

SAMPLING RATE (sps)

SUPPLY CURRENT (µA)

MAX1081, V

DD1

DD2

3.0V

LOAD

= 20pF

CODE = 1010100000

8 CHANNELS

1 CHANNEL

Figure 9. Reference Power-Up Delay vs. Time in Shutdown

Figure 10a. Average Supply Current vs. Sampling Rate (sps)

Using FULLPD and Internal Reference

Figure 10b. Average Supply Current vs. Sampling Rate (sps)

Using FULLPD and External Reference

2.5

2.0

1.0

1.5

0.5

150

250

100

200

300 350

SAMPLING RATE (sps)

SUPPLY CURRENT (mA)

MAX1081, V

DD1

= V

DD2

3.0V

LOAD

= 20pF

CODE = 1010100000

REDP

FASTPD

NORMAL OPERATION

Figure 11. Average Supply Current vs. Sampling Rate (sps) Using

FASTPD, REDP, Normal Operation, and Internal Reference

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 23 24

MAX1080/MAX1081 1

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