Datasheet

LM71, LM71-Q1
SNIS125D –MARCH 2004–REVISED MARCH 2013 www.ti.com
Device Number Thermal Resistance (θ
JA
)
LM71CIMF/LM71QCIMF 250°C/W
LM71CISD 57.6°C/W
Temperature-to-Digital Converter Characteristics
Unless otherwise noted, these specifications apply for V
+
= 2.65V to 3.6V
(1)
. Boldface limits apply for T
A
= T
J
= T
MIN
to
T
MAX
; all other limits T
A
= T
J
= +25°C, unless otherwise noted.
LM71CIMF
Units
Parameter Conditions Typical
(2)
LM71CISD
(Limit)
Limits
(3)
T
A
= −10°C to +65°C ±1.5 °C (max)
Temperature Error
(1)(4)
T
A
= −40°C to +85°C ±2.0 °C (max)
T
A
= −40°C to +150°C +3/−2 °C (max)
14 Bits
Resolution
0.03125 °C
Temperature Conversion Time See
(5)
200 270 ms (max)
Quiescent Current Serial Bus Inactive 300 550 μA (max)
(1) The LM71 will operate properly over the V
+
supply voltage range of 2.65V to 5.5V.
(2) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(3) Limits are ensured to AOQL (Average Outgoing Quality Level).
(4) For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy with internal heating. This can cause an
error of 0.64°C at full rated sink current and saturation voltage based on junction-to-ambient thermal resistance.
(5) This specification is provided only to indicate how often temperature data is updated. The LM71 can be read at any time without regard
to conversion state (and will yield last conversion result). A conversion in progress will not be interrupted. The output shift register will be
updated at the completion of the read and a new conversion restarted.
Logic Electrical Characteristics
DIGITAL DC CHARACTERISTICS
Unless otherwise noted, these specifications apply for V
+
= 2.65V to 3.6V
(1)
. Boldface limits apply for T
A
= T
J
= T
MIN
to
T
MAX
; all other limits T
A
= T
J
= +25°C, unless otherwise noted.
Symbol Parameter Conditions Typical
(2)
Limits
(3)
Units (Limit)
V
+
× 0.7 V (min)
V
IN(1)
Logical “1” Input Voltage
V
+
+ 0.3 V (max)
−0.3 V (min)
V
IN(0)
Logical “0” Input Voltage
V
+
× 0.3 V (max)
Input Hysteresis Voltage V
+
= 3.0V to 3.6V 0.4 0.33 V (min)
I
IN(1)
Logical “1” Input Current V
IN
= V
+
0.005 3.0 μA (max)
I
IN(0)
Logical “0” Input Current V
IN
= 0V −0.005 −3.0 μA (min)
C
IN
All Digital Inputs 20 pF
V
OH
High Level Output Voltage I
OH
= −400 μA 2.4 V (min)
V
OL
Low Level Output Voltage I
OL
= +2 mA 0.4 V (max)
V
O
= GND −1 μA (min)
I
O_TRI-STATE
TRI-STATE Output Leakage Current
V
O
= V
+
+1 μA (max)
(1) The LM71 will operate properly over the V
+
supply voltage range of 2.65V to 5.5V.
(2) Typicals are at T
A
= 25°C and represent most likely parametric norm.
(3) Limits are ensured to AOQL (Average Outgoing Quality Level).
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