Datasheet

MAX1253/MAX1254
Stand-Alone, 10-Channel, 12-Bit System Monitors
with Internal Temperature Sensor and V
DD
Monitor
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX1253), V
DD
= +4.5V to +5.5V (MAX1254), V
REF
= +2.5V (MAX1253), V
REF
= +4.096V (MAX1254), f
SCLK
= 10MHz (50% duty cycle), 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
(SCLK, DIN, CS)
Input Voltage Low V
IL
V
DD
x 0.3 V
Input Voltage High V
IH
V
DD
x 0.7 V
Input Hysteresis V
HYST
200 mV
Input Leakage Current I
IN
V
IN
= 0 or V
DD
±10 µA
Input Capacitance C
IN
2pF
DIGITAL OUTPUTS
(INT, DOUT)
I
SINK
= 8mA, DOUT 0.5
Output Voltage Low V
OL
I
SINK
= 2mA, INT 0.5
V
I
SOURCE
= 8mA, DOUT V
DD
- 0.5
Output Voltage High V
OH
I
SOURCE
= 2mA, INT V
DD
- 0.5
V
Tri-State Leakage Current I
L
CS = V
DD
±10 µA
Tri-State Output Capacitance C
OUT
CS = V
DD
5pF
POWER REQUIREMENTS
MAX1253 2.7 3.6
Positive Supply Voltage V
DD
MAX1254 4.5 5.5
V
MAX1253 internal reference (Note 9) 3.3
MAX1253 internal reference (Note 10) 2.9
MAX1253 external reference (Note 10) 2.2
MAX1254 internal reference (Note 9) 5.0
MAX1254 internal reference (Note 10) 4.0
MAX1254 external reference (Note 10) 3.0
mA
Supply Current I
DD
Both internal reference, mode 01 (Note 11) 8 µA
MAX1253 480
Full Power-Down Supply Current I
SHDN
Full power-down state
MAX1254 860
nA
Power-Supply Rejection Ratio PSRR Analog inputs at full scale (Note 12) ±0.4 ±1.6 mV/V