MAX148 Maxim, MAX148 Datasheet - Page 5

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

Note 1: Tested at V
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
Note 3: MAX149—internal reference, offset nulled; MAX148—external reference (VREF = +2.500V), offset nulled.
Note 4: Ground “on” channel; sine wave applied to all “off” channels.
Note 5: Conversion time defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle.
Note 6: The common-mode range for the analog inputs is from AGND to V
Note 7: Sample tested to 0.1% AQL.
Note 8: External load should not change during conversion for specified accuracy.
Note 9: ADC performance is limited by the converter’s noise floor, typically 300µVp-p.
Note 10: Guaranteed by design. Not subject to production testing.
Note 11: The MAX148 typically draws 400µA less than the values shown.
Note 12: Measured as
TIMING CHARACTERISTICS
(V
(V
__________________________________________Typical Operating Characteristics
Acquisition Time
DIN to SCLK Setup
DIN to SCLK Hold
SCLK Fall to Output Data Valid
CS Fall to Output Enable
CS Rise to Output Disable
CS to SCLK Rise Setup
CS to SCLK Rise Hold
SCLK Pulse Width High
SCLK Pulse Width Low
SCLK Fall to SSTRB
CS Fall to SSTRB Output Enable
CS Rise to SSTRB Output Disable
SSTRB Rise to SCLK Rise
DD
DD
-0.05
-0.10
0.10
0.05
= +2.7V to +5.25V, T
= 3.0V, VREF = 2.500V, f
0
0
been calibrated.
PARAMETER
INTEGRAL NONLINEARITY
256
DD
vs. CODE
_______________________________________________________________________________________
|
CODE
V
512
= 2.7V; COM = 0V; unipolar single-ended input mode.
+2.7V to +5.25V, Low-Power, 8-Channel,
FS
A
(2.7V) - V
= T
SCLK
MIN
768
to T
= 2.0MHz, C
FS
SYMBOL
t
(5.25V)
SSTRB
MAX
t
t
t
t
t
t
ACQ
t
t
t
1024
t
t
CSS
CSH
t
SDV
SCK
t
STR
DH
DO
CH
DS
DV
CL
TR
, unless otherwise noted.)
|
.
Figure 1
Figure 1
Figure 2
Figure 1
External clock mode only, Figure 1
External clock mode only, Figure 2
Internal clock mode only (Note 7)
LOAD
0.125
0.100
0.075
0.050
0.025
0
2.25
= 20pF, T
2.75
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX14_ _C/E
Figure 1
MAX14_ _M
3.25
SUPPLY VOLTAGE (V)
A
CONDITIONS
= +25°C, unless otherwise noted.)
MAX149
MAX148
3.75
4.25
DD
.
4.75
Serial 10-Bit ADCs
5.25
0.125
0.100
0.075
0.050
0.025
0
-60
MIN
100
100
200
200
1.5
20
20
V
0
0
0
DD
= 2.7V
MAX149
INTEGRAL NONLINEARITY
-20
vs. TEMPERATURE
TYP
TEMPERATURE (°C)
20
MAX148
60
MAX
200
240
240
240
240
240
240
100
UNITS
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
140
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