Rainbow Electronics MAX1299 - Manual (Page 3)

MAX1298/MAX1299
12-Bit Serial-Output Temperature Sensors
with 5-Channel ADC
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ELECTRICAL CHARACTERISTICS (continued)
(V DD = 4.75V to 5.25V (MAX1298), V DD = +2.7V to 3.6V (MAX1299), external reference, V REF = +2.5V (MAX1298), V REF = +1.2V
(MAX1299), f SCLK = 2.5MHz, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Input Voltage Low V IL 0.8 V
Input Voltage High V IH V D D - 0.8 V
Input Hysteresis V HYST 0.2 V
Input Leakage Current I IN 1 µA
Input Capacitance 16 pF
DIGITAL OUTPUTS V
Output Low Voltage V
OL
I
SINK
= 5mA 0.6 V
Output High Voltage V OH I SOURCE = 0.5mA V D D - 0.6 V
Three-State Output Leakage
Current
I OUT
±10 µA
Three-State Output
Capacitance
15 pF
POWER REQUIREMENTS
MAX1298 4.75 5.25
Positive Supply Voltage V DD
MAX1299 2.7 3.6
V
MAX1298 390 Ful l - on, vol tag e m easur em ents,
i nter nal r efer ence
MAX1299 350
MAX1298 310 Ful l - on, vol tag e m easur em ents,
exter nal r efer ence
MAX1299 280
MAX1298 440 500 Full-on, temperature measure-
ments, internal reference
MAX1299 400 500
MAX1298 360 Full-on, temperature measure-
ments, exter nal r efer ence
MAX1299 330
Standby, SCLK = GND 120
Standby-plus, SCLK = GND 190
Positive Supply Current (Note 6) I DD
Shutdown, SCLK = GND 2 10
µA
Power-Supply Rejection Ratio PSRR (Note 7) 50 65 dB
INTERNAL VOLTAGE REFERENCE CHARACTERISTICS
V DD = 5V MAX1298 2.494 2.50 2.506
Reference Voltage V REF
V DD = 3V MAX1299 1.197 1.20 1.203
V
Reference Tempco TC V REF
±20 ppm/ °C
Output Short-Circuit Current 1.25 mA
Capacitive Bypass at REF 0.1 µF
MAX1298 130
REF Output Noise f N = 10Hz to 10kHz
MAX1299 65
µV
RMS
MAX1298 +3.0
REF Line Regulation
MAX1299 +0.2
mV/V
MAX1298 4 10
REF Load Regulation
0 to 100 µA output current
(Note 8) MAX1299 2 10
µV/µA