Datasheet

MAX1253/MAX1254
Stand-Alone, 10-Channel, 12-Bit System Monitors
with Internal Temperature Sensor and V
DD
Monitor
8 _______________________________________________________________________________________
EXTERNAL TEMPERATURE SENSOR
TEMPERATURE ERROR
MAX1253/54 toc18
TEMPERATURE (°C)
ERROR (°C)
6040200-20
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2.0
-2.0
-40 80
MAX1253/MAX1254
EXTERNAL SENSOR,
DIFFERENTIAL INPUT
EXTERNAL SENSOR,
SINGLE-ENDED INPUT
TEMPERATURE ERROR vs. INTERCONNECT
CAPACITANCE (EXTERNAL SENSOR)
MAX1253/54 toc19
INTERCONNECT CAPACITANCE (pF)
TEMPERATURE (°C)
-5
-4
-3
-2
-1
0
1
-6
1
10 100
1000
EXTERNAL DIODE
DIFFERENTIAL TEMPERATURE
MEASUREMENT MODE
SAMPLING ERROR
vs. INPUT SOURCE IMPEDANCE
MAX1253/54 toc20
SOURCE IMPEDANCE (Ω)
SAMPLING ERROR (LSB)
1000100
-4
-3
-2
-1
0
1
-5
10 10,000
TURN ON THERMAL TRANSIENT,
CONTINUOUS CONVERSION
V
DD
= 3.0V
MAX1253/54 toc21
TIME (s)
TEMPERATURE SHIFT (°C)
252015105
0
0.125
0.250
0.375
0.500
0.625
-0.125
030
IN A TSSOP SOCKET
SOLDER ON A 2in ✕ 2in PWB
IN AN OIL BATH
EXTERNAL BJT
Typical Operating Characteristics (continued)
(V
DD
= +3V, V
REF
= 2.5V (MAX1253); V
DD
= 5V, V
REF
= 4.096V (MAX1254); f
SCLK
= 10MHz, C
REF
= 0.1µF, T
A
= +25°C, unless oth-
erwise noted.)