MAX146 Maxim, MAX146 Datasheet - Page 5

• Manufacturer Part Number: MAX146
• Description: +2.7Low-Power / 8-Channel / Serial 12-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: MAX146—internal reference, offset nulled; MAX147—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: External load should not change during conversion for specified accuracy.
Note 8: ADC performance is limited by the converter’s noise floor, typically 300µVp-p.
Note 9: Guaranteed by design. Not subject to production testing.
Note 10: 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
-0.1
-0.2
-0.3
-0.4
-0.5
0.5
0.4
0.3
0.2
0.1
= +2.7V to +3.6V (MAX146); V
= 3.0V, VREF = 2.500V, f
0
0
been calibrated.
PARAMETER
INTEGRAL NONLINEARITY
1024
DD
vs. CODE
_______________________________________________________________________________________
CODE
|
2048
V
= 2.7V; COM = 0V; unipolar single-ended input mode.
FS
(2.7V) - V
SCLK
3072
DD
= 2.0MHz, C
FS
SYMBOL
t
(V
= +2.7V to +5.25V (MAX147); T
SSTRB
t
t
t
t
t
t
4096
ACQ
t
t
t
t
t
CSS
CSH
t
SDV
SCK
t
STR
DH
DO
CH
DS
DV
CL
TR
DD, MAX
)
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 9)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
|
LOAD
.
0
2.25
+2.7V, Low-Power, 8-Channel,
= 20pF, T
2.75
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGE
3.25
MAX14_ _C/E
Figure 1
MAX14_ _M
A
CONDITIONS
MAX146
MAX147
= +25°C, unless otherwise noted.)
V
3.75
DD
(V)
A
= T
4.25
DD
MIN
.
4.75
to T
Serial 12-Bit ADCs
MAX
5.25
; unless otherwise noted.)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
-60
MIN
100
100
200
200
1.5
V
20
20
0
0
0
DD
= 2.7V
MAX146
INTEGRAL NONLINEARITY
-20
vs. TEMPERATURE
TEMPERATURE (°C)
TYP
20
MAX147
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
5