Owner manual

MAX1136–MAX1139
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
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ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 2.7V to 3.6V (MAX1137/MAX1139), V
DD
= 4.5V to 5.5V (MAX1136/MAX1138), V
REF
= 2.048V (MAX1137/MAX1139), V
REF
=
4.096V (MAX1136/MAX1138), C
REF
= 0.1µF, f
SCL
= 1.7MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C. See Tables 1–5 for programming notation.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Internal Clock Frequency 2.8
MHz
External clock, fast mode 60
Aperture Delay (Note 5) t
AD
External clock, high-speed mode 30
ns
ANALOG INPUT (AIN0–AIN11)
Unipolar 0
V
REF
Input-Voltage Range, Single-
Ended and Differential (Note 6)
Bipolar 0
±V
REF
/2
V
Input Multiplexer Leakage Current
ON/OFF leakage current, VAIN_ = 0 or VDD
±0.01
±1 µA
Input Capacitance CIN 22 pF
INTERNAL REFERENCE (Note 7)
MAX1137/MAX1139
1.968 2.048 2.128
Reference Voltage VREF T
A
= +25°C
MAX1136/MAX1138
3.939 4.096 4.256
V
Reference-Voltage Temperature
Coefficient
TCVREF
25
ppm/°C
REF Short-Circuit Current 2mA
REF Source Impedance 1.5 kΩ
EXTERNAL REFERENCE
REF Input-Voltage Range VREF (Note 8) 1
VDD
V
REF Input Current IREF f
SAMPLE
= 94.4ksps 40 µA
DIGITAL INPUTS/OUTPUTS (SCL, SDA)
Input High Voltage V
IH
0.7
✕
V
DD
V
Input Low Voltage V
IL
0.3
✕
V
DD
V
Input Hysteresis
V
HYST
0.1
✕
V
DD
V
Input Current I
IN
V
IN
0 to V
DD
±10 µA
Input Capacitance C
IN
15 pF
Output Low Voltage V
OL
I
SINK
= 3mA 0.4 V
POWER REQUIREMENTS
MAX1137/MAX1139 2.7 3.6
Supply Voltage V
DD
MAX1136/MAX1138 4.5 5.5
V
Internal reference 900
1150
f
SAMPLE
= 94.4ksps
external clock
External reference 670
900
Internal reference 530
f
SAMPLE
= 40ksps
internal clock
External reference 230
Internal reference 380
f
SAMPLE
= 10ksps
internal clock
External reference 60
Internal reference 330
f
SAMPLE
=1ksps
internal clock
External reference 6
µA
Supply Current I
DD
Shutdown (internal reference OFF) 0.5
110