Rainbow Electronics MAX11645 - Manual (Page 3)

MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V DD = 2.7V to 3.6V (MAX11645), V DD = 4.5V to 5.5V (MAX11644), V REF = 2.048V (MAX11645), V REF = 4.096V (MAX11644),
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.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG INPUT (AIN0/AIN1)
Unipolar 0 V REF Input Voltage Range, Single-
Ended and Differential (Note 7)
Bipolar 0
±V
REF /2
V
Input Multiplexer Leakage On/off leakage current, V AIN _ = 0 or V DD
±0.01 ±1 μA
Input Capacitance C IN 22 pF
INTERNAL REFERENCE (Note 8)
MAX11645 1.968 2.048 2.128
Reference Voltage V REF T A = +25°C
MAX11644 3.936 4.096 4.256
V
Reference-Voltage Temperature
Coefficient
TCV REF 25 ppm/
°C
REF Short-Circuit Current 2 mA
REF Source Impedance 1.5 k
EXTERNAL REFERENCE
REF Input Voltage Range V REF (Note 9) 1 V DD V
REF Input Current I REF f SAMPLE = 94.4ksps 40 μA
DIGITAL INPUTS/OUTPUTS (SCL, SDA)
Input-High Voltage V
IH
0.7 x V
DD
V
Input-Low Voltage V IL 0.3 x V DD V
Input Hysteresis V HYST 0.1 x 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
MAX11645 2.7 3.6
Supply Voltage V DD
MAX11644 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
Supply Current I DD
Shutdown (internal REF off) 0.5 10
μA
Power-Supply Rejection Ratio PSRR Full-scale input (Note 10)
±0.5 ±2.0 LSB/V