MAX148 Maxim, MAX148 Datasheet - Page 16

• Manufacturer Part Number: MAX148
• Description: +2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCs
• Manufacturer: Maxim

+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
Table 5. Software Power-Down
and Clock Mode
16
Figure 13. Average Supply Current vs. Conversion Rate with
External Reference
Figure 12b. Timing Diagram Power-Down Modes, Internal Clock
CLOCK
MODE
SSTRB
MODE
DOUT
PD1
______________________________________________________________________________________
DIN
0
0
1
1
10,000
1000
100
0.1
10
1
S X X X X X 1 0
0.1
V REF = V
R
CODE = 1010101000
LOAD
PD0
WITH EXTERNAL REFERENCE
1
AVERAGE SUPPLY CURRENT
0
1
0
1
=
vs. CONVERSION RATE
8 CHANNELS
DD
10
CONVERSION RATE (Hz)
= 3.0V
100
SETS INTERNAL
CLOCK MODE
CONVERSION
1k
1 CHANNEL
Fast Power-Down
Full Power-Down
10k
DEVICE MODE
External Clock
Internal Clock
100k
POWERED UP
1M
DATA VALID
INTERNAL
S
X
X
X
Table 6. Hard-Wired Power-Down
and Internal Clock Frequency
Figure 14a. MAX149 Supply Current vs. Conversion Rate,
FULLPD
X
Floating
STATE
SHDN
X
0 0
1
0
SETS
POWER-DOWN
CONVERSION
Power-Down
DEVICE
Enabled
Enabled
100
MODE
10
1
0.01
R
CODE = 1010101000
LOAD
AVERAGE SUPPLY CURRENT
0.1
=
vs. CONVERSION RATE
CONVERSION RATE (Hz)
COMPENSATION
(USING FULLPD)
DATA VALID
REFERENCE-
POWER-DOWN
1
8 CHANNELS
BUFFER
External
Internal
N/A
10
1 CHANNEL
100
S
FREQUENCY
POWERED UP
1k
INTERNAL
CLOCK
1.8MHz
225kHz
N/A