MAX1282 Datasheet, PDF (17/24 Pages) Maxim Integrated Products – 300ksps/400ksps, Single-Supply, 4-Channel, Serial 12-Bit ADCs with Internal Reference

300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
CS
DIN
S CONTROL BYTE 0
1
8
SCLK
S CONTROL BYTE 1
12
16 1
5
8
S CONTROL BYTE 2
12
16 1
5
8
S ETC
12
16 1
5
DOUT
B11
B6
B0
CONVERSION RESULT 0
B11
B6
B0
CONVERSION RESULT 1
B11
B6
SSTRB
Figure 7. Continuous 16-Clock/Conversion Timing
1.50
1.25
1.00
0.75
0.50
0.25
0
0.0001 0.001 0.01 0.1
1
10
TIME IN SHUTDOWN (s)
Figure 8. Reference Power-Up Delay vs. Time in Shutdown
10k
MAX1283, V_DD1 = V_{DD 2} = 3.0V
C_LOAD = 20pF
CODE = 101010000000
1k
4 CHANNELS
100
1 CHANNEL
10
1
1
10
100
1k
10k 100k
SAMPLING RATE (sps)
Figure 9b. Average Supply Current vs. Conversion Rate with
External Reference in FULLPD
1k
MAX1283, V_DD1 = V_DD2 = 3.0V
C_LOAD = 20pF
CODE = 101010000000
100
4 CHANNELS
10
1 CHANNEL
1
0.1
1
10
100
1k
10k
SAMPLING RATE (sps)
2.5
NORMAL OPERATION
2.0
REDP
FASTPD
1.5
1.0
MAX1283, V_DD1 = V_DD2 = 3.0V
C_LOAD = 20pF
CODE = 101010000000
0.5
0 50 100 150 200 250 300 350
SAMPLING RATE (sps)
Figure 9a. Average Supply Current vs. Conversion Rate with
Internal Reference in FULLPD
Figure 10. Average Supply Current vs. Sampling Rate (in
FASTPD, REDP, and Normal Operation)
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