LT1787HV_15 Datasheet, PDF (6/16 Pages) Linear Technology – Precision, High Side Current Sense Amplifiers

LT1787/LT1787HV
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the temperature range –40°C ≤ T_A ≤ 125°C, otherwise specifications are at
T_A = 25°C. Total supply = (V_S– – V_EE) = 2.5V to 36V (LT1787H), 2.5V to 60V (LT1787HVH) unless otherwise specified. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
V_OMIN
Minimum Output Voltage
Unipolar Output
Saturation Voltage
V_OMAX Maximum Output Voltage
R_G1A, R_G2A Input Gain-Setting Resistor
R_OUT
Output Resistor
V_SENSE = 0V, V_BIAS = 0V
V_SENSE = V_S+ – V_S– = –128mV, V_BIAS = 0V
V_SENSE = 0V, V_BIAS = 0V
V_SENSE = V_S+ – V_S– = –128mV, V_BIAS = 0V
V_SENSE = 2mV, V_BIAS = 0V
V_SENSE = 4mV, V_BIAS = 0V
V_SENSE = 5mV, V_BIAS = 0V
V_SENSE = 6mV, V_BIAS = 0V
V_SENSE = 2mV, V_BIAS = 0V
V_SENSE = 4mV, V_BIAS = 0V
V_SENSE = 5mV, V_BIAS = 0V
V_SENSE = 6mV, V_BIAS = 0V
Pin 1 to Pin 2, Pin 7 to Pin 8
Pin 5 to Pin 6
30
45
10
●
30
55
10
32
50
38
55
43
60
49
65
●
32
60
●
38
65
●
43
70
●
49
75
V_S+ – 0.75
1.25
20
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
kΩ
kΩ
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: ESD (Electrostatic Discharge) sensitive devices. Extensive use of
ESD protection devices are used internal to the LT1787/LT1787HV,
however, high electrostatic discharge can damage or degrade the device.
Use proper ESD handling precautions.
Note 3: The LT1787C/LT1787I are guaranteed functional over the
operating temperature range of –40°C to 85°C. The LT1787H is
guaranteed functional over the operating temperature range of –40°C to
125°C.
Note 4: The LT1787C is guaranteed to meet specified performance from
0°C to 70°C. The LT1787C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but is not tested or QA
sampled at these temperatures. The LT1787I is guaranteed to meet
specified performance from – 40°C to 85°C. The LT1787H is guaranteed to
meet specified performance from –40°C to 125°C.
Note 5: Testing done at V_BIAS = 1.25V, V_EE = 0V unless otherwise
specified.
Note 6: This parameter is not 100% tested.
TYPICAL PERFORMANCE CHARACTERISTICS
Input Offset Voltage vs
Supply Voltage
50
40
V_S+ = V_S–
V_BIAS = 0V
30 VEE = –1.25V
20
T_A = 85°C
10
0
T_A = 25°C
–10
–20
–30
T_A = –40°C
–40
–50
0 10 20 30 40 50 60
TOTAL SUPPLY VOLTAGE (V)
1787 G01
6
No Load Output Voltage
vs Supply Voltage
400
V_S+ = V_S–
300 V_BIAS = 0V
V_EE = –1.25V
200
T_A = 85°C
100
0
–100
T_A = 25°C
–200
–300
T_A = –40°C
–400
0
10 20 30 40 50 60
TOTAL SUPPLY VOLTAGE (V)
1787 G02
No Load Output Current vs
Supply Voltage
10
8
T_A = –40°C
6
4
T_A = 25°C
2
0
–2
T_A = 85°C
–4
–6 V_BIAS = 1V
–8
V_EE = 0V
V_S+ = V_S–
–10
0 10 20 30 40 50 60
TOTAL SUPPLY VOLTAGE (V)
1787 G03
1787fc