LDC0851 Datasheet, PDF (5/39 Pages) Texas Instruments – Differential Inductive Switch

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LDC0851
SNOSCZ7A – DECEMBER 2015 – REVISED JANUARY 2016
7.5 Electrical Characteristics⁽¹⁾
Over recommended operating conditions unless otherwise noted. V_DD= 3.3 V, EN tied to 3.3 V, T_A=25 °C, ADJ tied to GND.
PARAMETER
TEST CONDITIONS
MIN ⁽²⁾
TYP ⁽³⁾ MAX⁽²⁾
UNIT
POWER
V_DD
I_STATIC
I_DYN
I_SD
SENSOR
Supply Voltage
Static Supply Current ⁽⁴⁾
Dynamic Supply Current (not including
sensor current)⁽⁴⁾
Shutdown Mode Supply Current
ƒ_SENSOR = 15 MHz
C_PARASITIC = 22 pF
1.71
3.46
V
0.70
mA
0.66
mA
0.14
1
µA
I_{SENSOR_MAX}
L_{SENSOR_MIN}
ƒ_{SENSOR_MAX}
C_TOTAL
Maximum sensor current⁽⁴⁾
V_DD = 1.71 V
V_DD = 3.3 V
Sensor Minimum Inductance⁽⁵⁾
C_TOTAL = 33 pF
V_DD = 1.71 V
C_TOTAL = 33 pF
V_DD = 3.3 V
Max Sensor Resonant Frequency⁽⁵⁾
Minimum total capacitance on LCOM⁽⁵⁾
Sensor inductance = 2 µH
C_TOTAL = 33 pF
Includes parasitic pin capacitance and
PCB parasitic capacitance
4.35
6
2.5
1.8
19
33
mA
mA
µH
MHz
pF
Pin parasitic capacitance on LCOM
C_IN
Pin parasitic capacitance on LREF and
LSENSE
12
pF
8
pF
DETECTION
d_HYST
d_TOL
Switching distance hysteresis⁽⁶⁾
Switching threshold tolerance⁽⁶⁾
THRESHOLD ADJUST
2.5 %
0.1 %
V_ADJ
V_{ADJ_TOL}
Adjust input range
Adjust threshold tolerance
0
V_DD/2
V
±6
mV
(1) Electrical Characteristics Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions
result in very limited self-heating of the device such that T_J = T_A. No guarantee of parametric performance is indicated in the electrical
tables under conditions of internal self-heating where T_J > T_A. Absolute Maximum Ratings indicate junction temperature limits beyond
which the device may be permanently degraded, either mechanically or electrically.
(2) Limits are ensured by testing, design, or statistical analysis at 25°C. Limits over the operating temperature range are ensured through
correlations using statistical quality control (SQC) method.
(3) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on
shipped production material.
(4) Refer to section Active Mode for a description and calculation of the various supply currents.
(5) See Sensor Design for sensor guidance.
(6) Two matched 10 mm diameter sensors were used with a switching distance of 3 mm. See Hysteresis for more information.
7.6 Interface Voltage Levels
PARAMETER
V_IH
Input High Voltage
V_IL
Input Low Voltage
V_OH
Output High Voltage(1mA source current)
V_OL
Output Low Voltage (1mA sink current)
MIN
0.8Ë£V_DD
V_DD-0.4
TYP
MAX
0.2Ë£V_DD
0.4
UNIT
V
V
V
V
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