Datasheet LTC6104 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | High Voltage, High Side, Bi-Directional Current Sense Amplifier |
| Páginas / Página | 16 / 1 — FEATURES. DESCRIPTION. Wide Supply Range: 4V to 60V with 70V Absolute. … |
| Formato / tamaño de archivo | PDF / 317 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Wide Supply Range: 4V to 60V with 70V Absolute. Maximum. Low Offset Voltage: ±450µV Maximum
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LTC6104 High Voltage, High Side, Bi-Directional Current Sense Amplifi er
FEATURES DESCRIPTION
■
Wide Supply Range: 4V to 60V with 70V Absolute
The LTC®6104 is a versatile, high voltage, high side, bi-
Maximum
directional current sense amplifi er. Design fl exibility is ■
Low Offset Voltage: ±450µV Maximum
provided by the excellent device characteristics: ±450µV ■
Fast Response: 1µs Response Time
maximum offset and only 520µA of current consumption ■
Gain Confi gurable with External Resistors; Each
(typical at 12V). The LTC6104 operates on supplies from
Direction is Gain Confi gurable
4V to 60V. ■ Low Input Bias Current: 170nA Maximum The LTC6104 monitors bi-directional current via the voltage ■ PSRR: 110dB Minimum across an external sense resistor (shunt resistor). This ■ Output Current: ±1mA Maximum sense voltage is then translated into a ground referenced ■ Low Supply Current: 520µA, VS = 12V signal. Gain is set with three external resistors and can ■ Specifi ed for –40°C to 125°C Temperature Range be separately confi gured for both directions. Low DC ■ Available in an 8-Lead MSOP Package offset allows the use of a small shunt resistor and large
APPLICATIONS
gain-setting resistors. As a result, power loss in the shunt is minimal. ■ Current Shunt Measurement The wide operating supply range and high accuracy make ■ Battery Monitoring the LTC6104 ideal for a wide variety of automotive, industrial ■ Remote Sensing and power management applications. A maximum input ■ Power Management sense voltage of 500mV allows a wide range of currents , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. to be monitored. The fast response makes the LTC6104 All other trademarks are the property of their respective owners. the perfect choice for load current warnings and shutoff protection control. With very low supply current, the LTC6104 is suitable for power sensitive applications. The LTC6104 is available in an 8-lead MSOP package.
TYPICAL APPLICATION 16-Bit Resolution Bi-Directional Output into LTC1286 ADC
ILOAD VSENSE TO – + CHARGER/LOAD
Step Response
R + SENSE R R 12V IN IN 100Ω 100Ω ∆V V – SENSE = 100mV SENSE 8 7 6 5 6V +INA –INA –INB +INB + – – + A B + V V R1 S S C1 2.3k 5V 1µF VREF T V A = 25°C OUT VS = 12V V IOUT = 100µA RIN = 100Ω REF VCC CURRENT 1.5V ROUT = 5k +IN CS + OUT MIRROR V– 1V VSENSE = VS LTC6104 I V 1 4 LTC1286 CLK TO µP OUT = 0µA REF = 1V –IN D C2 OUT TIME (1µs/DIV) ROUT 0.1 LT®1004-2.5 2.5k µF GND 6104 G15 6104 TA01a 6104f 1
FEATURES DESCRIPTION
■
Wide Supply Range: 4V to 60V with 70V Absolute
The LTC®6104 is a versatile, high voltage, high side, bi-
Maximum
directional current sense amplifi er. Design fl exibility is ■
Low Offset Voltage: ±450µV Maximum
provided by the excellent device characteristics: ±450µV ■
Fast Response: 1µs Response Time
maximum offset and only 520µA of current consumption ■
Gain Confi gurable with External Resistors; Each
(typical at 12V). The LTC6104 operates on supplies from
Direction is Gain Confi gurable
4V to 60V. ■ Low Input Bias Current: 170nA Maximum The LTC6104 monitors bi-directional current via the voltage ■ PSRR: 110dB Minimum across an external sense resistor (shunt resistor). This ■ Output Current: ±1mA Maximum sense voltage is then translated into a ground referenced ■ Low Supply Current: 520µA, VS = 12V signal. Gain is set with three external resistors and can ■ Specifi ed for –40°C to 125°C Temperature Range be separately confi gured for both directions. Low DC ■ Available in an 8-Lead MSOP Package offset allows the use of a small shunt resistor and large
APPLICATIONS
gain-setting resistors. As a result, power loss in the shunt is minimal. ■ Current Shunt Measurement The wide operating supply range and high accuracy make ■ Battery Monitoring the LTC6104 ideal for a wide variety of automotive, industrial ■ Remote Sensing and power management applications. A maximum input ■ Power Management sense voltage of 500mV allows a wide range of currents , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. to be monitored. The fast response makes the LTC6104 All other trademarks are the property of their respective owners. the perfect choice for load current warnings and shutoff protection control. With very low supply current, the LTC6104 is suitable for power sensitive applications. The LTC6104 is available in an 8-lead MSOP package.
TYPICAL APPLICATION 16-Bit Resolution Bi-Directional Output into LTC1286 ADC
ILOAD VSENSE TO – + CHARGER/LOAD
Step Response
R + SENSE R R 12V IN IN 100Ω 100Ω ∆V V – SENSE = 100mV SENSE 8 7 6 5 6V +INA –INA –INB +INB + – – + A B + V V R1 S S C1 2.3k 5V 1µF VREF T V A = 25°C OUT VS = 12V V IOUT = 100µA RIN = 100Ω REF VCC CURRENT 1.5V ROUT = 5k +IN CS + OUT MIRROR V– 1V VSENSE = VS LTC6104 I V 1 4 LTC1286 CLK TO µP OUT = 0µA REF = 1V –IN D C2 OUT TIME (1µs/DIV) ROUT 0.1 LT®1004-2.5 2.5k µF GND 6104 G15 6104 TA01a 6104f 1