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LT6105IDCB#TRPBF

Current Sense Amp, 105V CM, 1MHz, SOT-23-6

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Manufacturer Part：

LT6105IDCB#TRPBF

Package：

SOT-23-6 (2.9 x 1.6 x 1.0 mm)

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Description

Product Overview

The LT6105IDCB#TRPBF from Analog Devices is a high-side current sense amplifier with 105V maximum common mode, 1MHz bandwidth, and SOT-23-6 package.

Key Specifications

Type High-Side Current Sense Amplifier
Common Mode Voltage 2.7V to 105V
Bandwidth 1 MHz
Gain Accuracy +/-0.3% (max)
Input Offset Voltage +/-300 uV (max)
Gain External resistor set
Supply Voltage 2.7V to 60V
Supply Current 260 uA (typical)
Output Current 1 mA (typical)
CMRR 100 dB (min)
Package SOT-23-6 (DCB suffix)
Operating Temperature -40C to +85C (I grade)

Features

  • 105V maximum common mode voltage
  • 1 MHz bandwidth for fast current sensing
  • +/-0.3% gain accuracy
  • +/-300 uV max input offset voltage
  • 100 dB minimum CMRR
  • External gain resistor for flexible configuration
  • #TRPBF suffix: lead-free tape and reel

Applications

  • Battery current monitoring
  • Motor current sensing
  • Power supply current limiting
  • Solar panel monitoring

The LT6105IDCB#TRPBF from Analog Devices is a high-side current sense amplifier that operates with common mode voltages from 2.7V to 105V, making it suitable for a wide range of industrial, automotive, and telecom power supply monitoring applications. The 1 MHz bandwidth supports fast overcurrent detection and switching power supply current mode control. The +/-0.3% gain accuracy and +/-300 uV maximum input offset voltage provide precise current measurement for fuel gauging and efficiency monitoring. The 100 dB minimum CMRR ensures accurate measurement even with large common mode voltage swings. The gain is set by two external resistors, allowing the designer to optimize the output voltage range for the ADC. The #TRPBF suffix indicates lead-free tape and reel packaging from ADI. This is the tape-and-reel version of the LT6105IDCB.

The LT6105 uses a precision difference amplifier to measure the voltage across an external sense resistor in the high-side power path. The inputs (V+ and V-) connect across the sense resistor and see the common mode voltage (up to 105V). An internal level-shifting network attenuates the common mode voltage while preserving the differential sense voltage. The attenuated signal is amplified by the internal gain stage, with the final gain determined by the ratio of two external resistors: Gain = RIN/RSENSE x ROUT/RIN. The output voltage is VOUT = ISENSE x RSENSE x Gain. The 1 MHz bandwidth is achieved through a wideband internal amplifier. The 100 dB CMRR is maintained by laser-trimmed resistor networks that ensure precise matching of the input attenuation paths. The 260 uA supply current powers the internal amplifier and level-shifting circuitry. The output is a voltage referenced to the device ground, compatible with ADC inputs.

Pin Name Type Function
1 V- Input Negative sense input (load side)
2 V+ Input Positive sense input (supply side)
3 VCC Power Supply voltage (2.7-60V)
4 OUT Output Amplified output voltage
5 GND Power Ground
6 -IN Input External gain resistor connection
  • 48V telecom battery current monitoring with 105V CM and 0.3% accuracy
  • Motor driver overcurrent protection with 1MHz bandwidth for PWM current sensing
  • Solar panel string current monitoring with 100V common mode headroom
  • Industrial 24V power supply current limiting with precision gain resistor
Manufacturer Part Number Package Notes
ADI LT6105IDCB SOT-23-6 Same device, tube packaging
TI INA240A1DR SOIC-8 80V CM, enhanced PWM rejection
TI INA281A1DR SOIC-8 110V CM, 200kHz
Maxim MAX9938TAUK+T SOT-23-5 28V CM, low cost
ADI LT6100IS6#TRPBF SOT-23-6 44V CM, fixed gain version
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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