MAX1248 Datasheet, PDF (15/24 Pages) Maxim Integrated Products – 2x4-Channel, Simultaneous-Sampling 14-Bit DAS

+2.7V to +5.25V, Low-Power, 4-Channel,
Serial 10-Bit ADCs in QSOP-16
Table 4. Typical Power-Up Delay Times
REFERENCE
BUFFER
Enabled
REFERENCE-BUFFER
COMPENSATION
MODE
Internal
VREF
CAPACITOR
(µF)
—
Enabled
Internal
—
Enabled
External
4.7
Enabled
External
4.7
Disabled
—
—
Disabled
—
—
POWER-DOWN
MODE
Fast
Full
Fast
Full
Fast
Full
POWER-UP
DELAY
(µs)
5
300
See Figure 13c
See Figure 13c
2
2
MAXIMUM
SAMPLING RATE
(ksps)
26
26
133
133
133
133
CLOCK
MODE
SHDN
DIN
SETS EXTERNAL
CLOCK MODE
SXXXXX11
EXTERNAL
SETS SOFTWARE SETS EXTERNAL
POWER-DOWN
CLOCK MODE
SX X XXX0 0
S XX XXX1 1
EXTERNAL
DOUT
MODE
10+2 DATA BITS
POWERED UP
Figure 11a. Timing Diagram Power-Down Modes, External Clock
10+2 DATA BITS
VALID INVALID
DATA DATA
POWERED UP
SOFTWARE
POWER-DOWN
HARDWARE
POWER-
DOWN
POWERED UP
CLOCK
MODE
SETS INTERNAL
CLOCK MODE
INTERNAL
SETS
POWER-DOWN
DIN
SXXXXX10
SX X XXX0 0
S
DOUT
DATA VALID
DATA VALID
SSTRB
MODE
CONVERSION
POWERED UP
CONVERSION
POWER-DOWN
POWERED UP
Figure 11b. Timing Diagram Power-Down Modes, Internal Clock
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