
MAX1134/MAX1135
16-Bit ADCs, 150ksps, 3.3V Single Supply
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3
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = 3.3V ±5%, fSCLK = 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF =
2.048V, CREF = 4.7F, CCREF = 1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Unipolar
7.5
10.5
MAX1134
Bipolar
5.9
8.4
Unipolar
100
1000
Input Impedance
MAX1135
Bipolar
3.4
5.3
k
Input Capacitance
32
pF
CONVERSION RATE
Internal Clock Frequency
3
MHz
Aperture Delay
tAD
10
ns
Aperture Jitter
tAJ
50
ps
MODE 1 (24 EXTERNAL CLOCK CYCLES PER CONVERSION)
Unipolar
0.1
3.0
External Clock Frequency
fSCLK
Bipolar
0.1
3.6
MHz
Unipolar
4.17
125
Sample Rate
fS =
fSCLK / 24
Bipolar
4.17
150
ksps
Unipolar
8
240
Conversion Time (Note 4)
tCONV+ACQ
= 24 /
fSCLK
Bipolar
6.7
240
s
MODE 2 (INTERNAL CLOCK MODE)
External Clock Frequency
(Data Transfer Only)
4
MHz
Conversion Time
(SSTRB low pulse width)
5.3
7
s
Unipolar
1.67
Acquisition Time (Note 5)
Bipolar
1.39
s
MODE 3 (32 EXTERNAL CLOCK CYCLES PER CONVERSION)
External Clock Frequency
fSCLK
Unipolar or bipolar
0.1
3.6
MHz
Sample Rate
fS =
fSCLK / 32
Unipolar or bipolar
3.125
112
ksps
Conversion Time (Note 4)
tCONV+ACQ
= 32 /
fSCLK
Unipolar or bipolar
8.89
320
s
EXTERNAL REFERENCE
Input Range
(Notes 6, 7)
1.9
2.048
2.2
V
VREF = 2.048V, fSCLK = 3.6MHz
110
VREF = 2.048V, fSCLK = 0
100
Input Current
In power-down, fSCLK = 0
0.1
A
DIGITAL INPUTS
Input High Voltage
VIH
2.4
V
Input Low Voltage
VIL
0.8
V
Input Leakage
IIN
VIN = 0 or DVDD
-1
+1
A