Rainbow Electronics MAX1081 User Manual
Page 17
MAX1080/MAX1081
300ksps/400ksps, Single-Supply, Low-Power,
8-Channel, Serial 10-Bit ADCs with Internal Reference
______________________________________________________________________________________
17
SCLK
1
1
1
5
8
8
5
8
12
12
12
16
16
1
5
16
B4
B9
S0
B4
B9
S0
DIN
SSTRB
DOUT
CS
CONTROL BYTE 0
S
S
S
CONTROL BYTE 1
CONVERSION RESULT 1
CONVERSION RESULT 0
CONTROL BYTE 2
S
ETC.
B4
B9
HIGH-Z
HIGH-Z
Figure 8. Continuous 16-Clock/Conversion Timing
0
0.50
0.25
1.00
0.75
1.25
1.50
0.0001
0.01
0.001
0.1
1
10
TIME IN SHUTDOWN (s)
REFERENCE POWER-UP DELAY (ms)
MAX1081, V
DD1
=
V
DD2
=
3.0V
C
LOAD
= 20pF
CODE = 1010100000
1000
100
10
1
0.1
10
1
100
1k
10k
SAMPLING RATE (sps)
SUPPLY CURRENT (
µ
A)
8 CHANNELS
1 CHANNEL
10,000
1000
10
100
1
1
100
10
1k
10k
100k
SAMPLING RATE (sps)
SUPPLY CURRENT (
µ
A)
MAX1081, V
DD1
=
V
DD2
=
3.0V
C
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
0
150
250
100
50
200
300
350
SAMPLING RATE (sps)
SUPPLY CURRENT (mA)
MAX1081, V
DD1
= V
DD2
=
3.0V
C
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