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MAX11634 Datasheet, PDF (3/24 Pages) Maxim Integrated Products – 12-Bit, 300ksps ADCs with Differential
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12-Bit, 300ksps ADCs with Differential
Track/Hold, and Internal Reference
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 2.7V to 3.6V (MAX11635/MAX11637), VDD = 4.75V to 5.25V (MAX11634/MAX11636), fSAMPLE = 300kHz, fSCLK = 4.8MHz
(external clock, 50% duty cycle), VREF = 2.5V (MAX11635/MAX11637), VREF = 4.096V (MAX11634/MAX11636) TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
CONVERSION RATE
Power-Up Time
External reference
tPU
Internal reference (Note 5)
Acquisition Time
Conversion Time
tACQ
tCONV
Internally clocked
Externally clocked (Note 6)
External Clock Frequency
fSCLK
Externally clocked conversion
Data I/O
Aperture Delay
Aperture Jitter
ANALOG INPUT
Input Voltage Range
Unipolar
Bipolar (Note 7)
Input Leakage Current
Input Capacitance
VIN = VDD
During acquisition time (Note 8)
INTERNAL REFERENCE
REF Output Voltage
MAX11634/MAX11636
MAX11635/MAX11637
REF Temperature Coefficient
TCREF
MAX11634/MAX11636
MAX11635/MAX11637
Output Resistance
REF Output Noise
REF Power-Supply Rejection
PSRR
EXTERNAL REFERENCE INPUT
REF- Input Voltage Range
VREF-
REF+ Input Voltage Range
VREF+
VREF+ = 2.5V (MAX11635/MAX11637),
VREF+ = 4.096V (MAX11634/MAX11636),
REF+ Input Current
IREF+
fSAMPLE = 300ksps
VREF+ = 2.5V (MAX11635/MAX11637),
VREF+ = 4.096V (MAX11634/MAX11636),
fSAMPLE = 0
DIGITAL INPUTS (SCLK, DIN, CS, CNVST (Note 9)
Input Voltage Low
MAX11634/MAX11636
VIL
MAX11635/MAX11637
Input Voltage High
MAX11634/MAX11636
VIH
MAX11635/MAX11637
Input Hysteresis
VHYST
MIN TYP MAX UNITS
0.8
µs
65
0.6
µs
3.5
µs
2.7
0.1
4.8
MHz
10
30
ns
< 50
ps
0
-VREF/2
VREF
V
+VREF/2
±0.01 ±1
µA
24
pF
4.024
2.48
4.096
2.50
±20
±30
6.5
200
-70
4.168
V
2.52
ppm/°C
k
µVRMS
dB
0
500
mV
1.0
VDD + 50mV V
40
100
µA
±0.1
±5
0.8
V
VDD x 0.3
2.0
V
VDD x 0.7
200
mV
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