MAX149AEAP Maxim Integrated Products, MAX149AEAP Datasheet - Page 15
MAX149AEAP
Manufacturer Part Number
MAX149AEAP
Description
ADC (A/D Converters) Integrated Circuits (ICs)
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX148BCAP.pdf
(23 pages)
Specifications of MAX149AEAP
Architecture
SAR
Conversion Rate
133 KSPs
Input Type
Voltage
Maximum Power Dissipation
640 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SSOP-20
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
No
delay and maximum sample rate. In external compensa-
tion mode, power-up time is 20ms with a 4.7FF com-
pensation capacitor when the capacitor is initially fully
discharged. From fast power-down, startup time can be
eliminated by using low-leakage capacitors that do not
Figure 11a. External Clock Mode, 15 Clocks/Conversion Timing
Figure 11b. External Clock Mode, 16 Clocks/Conversion Timing
Figure 12a. Timing Diagram Power-Down Modes, External Clock
DOUT
SCLK
DIN
CLOCK
CS
MODE
MODE
SHDN
DOUT
SSTRB
DOUT
SCLK
DIN
DIN
CS
S X X X X X 1 1
S
1
S
1
______________________________________________________________________________________
CONTROL BYTE 0
+2.7V to +5.25V, Low-Power, 8-Channel,
CONTROL BYTE 0
SETS EXTERNAL
CLOCK MODE
10 + 2 DATA BITS
POWERED UP
8
8
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 S1 S0
B9
S
B8
X
X
B7
X
CONVERSION RESULT 0
X
B6
X
EXTERNAL
CONVERSION RESULT 0
0 0
15
B5
S
SETS SOFTWARE
POWER-DOWN
1
B4
16
B3
10 + 2 DATA BITS
discharge more than ½ LSB while shut down. In power-
down, leakage currents at VREF cause droop on the
reference bypass capacitor. Figures 12a and 12b show
the various power-down sequences in both external and
internal clock modes.
CONTROL BYTE 1
B2
S
1
B1
B0
CONTROL BYTE 1
POWER-DOWN
S1
SOFTWARE
Serial 10-Bit ADCs
S0
SETS EXTERNAL
8
CLOCK MODE
S
X X X X X
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 S1 S0
POWERED UP
8
1 1
CONVERSION RESULT 1
VALID
DATA
POWER-DOWN
15
HARDWARE
EXTERNAL
B9
CONVERSION RESULT 1
INVALID
DATA
S
1
B8
B7
CONTROL BYTE 2
B6
POWERED UP
16
15