Datasheet

MAX1282/MAX1283
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
______________________________________________________________________________________ 17
SCLK
11 15885812 12 1216 16 1 516
B6B11B0B6B11B0
DIN
SSTRB
DOUT
CS
CONTROL BYTE 0SSSCONTROL BYTE 1
CONVERSION RESULT 1CONVERSION RESULT 0
CONTROL BYTE 2 S ETC
B6B11
Figure 7. Continuous 16-Clock/Conversion Timing
0
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)
MAX1283, V
DD1
= V
DD2
= 3.0V
C
LOAD
= 20pF
CODE = 101010000000
1k
100
10
1
0.1 101 100 1k 10k
SAMPLING RATE (sps)
SUPPLY CURRENT (µA)
4 CHANNELS
1 CHANNEL
10k
1k
10
100
1
110010 1k 10k 100k
SAMPLING RATE (sps)
SUPPLY CURRENT (µA)
MAX1283, V
DD1
= V
DD 2
= 3.0V
C
LOAD
= 20pF
CODE = 101010000000
4 CHANNELS
1 CHANNEL
Figure 8. Reference Power-Up Delay vs. Time in Shutdown
Figure 9a. Average Supply Current vs. Conversion Rate with
Internal Reference in FULLPD
Figure 9b. Average Supply Current vs. Conversion Rate with
External Reference in FULLPD
2.5
2.0
1.0
1.5
0.5
0
150
250
100
50
200
300 350
SAMPLING RATE (sps)
SUPPLY CURRENT (mA)
MAX1283, V
DD1
= V
DD2
= 3.0V
C
LOAD
= 20pF
CODE = 101010000000
REDP
FASTPD
NORMAL OPERATION
Figure 10. Average Supply Current vs. Sampling Rate (in
FASTPD, REDP, and Normal Operation)