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LTC4151CMS-1-TRPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC4151CMS-1-TRPBF Datasheet(HTML) 6 Page - Linear Technology |
6 / 16 page LTC4151/LTC4151-1 6 41511fa PIN FUNCTIONS SENSE+ (Pin 1): Kelvin Sense of the VIN Pin. See Figure 10 for recommended Kelvin connection. VIN (Pin 2): Supply Voltage Input. Accepts 7V to 80V. The voltage at this pin is monitored by the onboard ADC with a full-scale input range of 102.4V. SENSE+ must be connected to VIN for proper ADC readout. ADR1, ADR0 (Pin 3, Pin 4): I2C Device Address Inputs. Connecting ADR1 and ADR0 to VIN, GND or leaving the pins open configures one of nine possible addresses. See Table 1 in the Applications Information section for details. ADIN (Pin 5): ADC Input. The onboard ADC measures volt- age range between 0V and 2.048V. Tie to GND if unused. SCL (Pin 6): I2C Bus Clock Input. Data is shifted in and out at the SDA pin on rising edges of SCL. This pin is driven by an open collector output from a master controller. An external pull-up resistor or current source is required and can be placed between SCL and VIN. The voltage at SCL is internally clamped to 6V (5.5V minimum). SDA (Pin 7, LTC4151 Only): I2C Bus Data Input/Output. Used for shifting in address, command or data bits and sending out data. An external pull-up resistor or current source is required and can be placed between SDA and VIN. The voltage at SDA is internally clamped to 6V (5.5V minimum). SDAI (Pin 7, LTC4151-1 Only): I2C Bus Data Input. Used for shifting in address, command or data bits. This pin is driven by an open collector output from a master controller. An external pull-up resistor or current source is required and can be placed between SDAI and VIN. The voltage at SDAI is internally clamped to 6V (5.5V minimum). SDAO (Pin 8, LTC4151-1 Only): Inverted Serial Bus Data Output. Open-drain output used for sending data back to the master controller or acknowledging a write operation. Data is inverted for convenience of optoisolation. An external pull-up resistor or current source is required. SHDN (Pin 8, LTC4151 Only): Shutdown Input. Internally pulled up to 6.3V. Pull this pin below 1V to force the LTC4151 into shutdown mode. Leave this pin open if unused. GND (Pin 9): Device Ground. SENSE– (Pin 10): High Side Current Sense Input. Connect an external sense resistor between SENSE+ and SENSE–. The differential voltage between SENSE+ and SENSE– is monitored by the onboard ADC with a full-scale sense voltage of 81.92mV. Exposed Pad (Pin 11, DD Package Only): Exposed pad may be left open or connected to device ground (GND). (DD/MS) TYPICAL PERFORMANCE CHARACTERISTICS V IN = 12V, TA = 25°C, unless noted. SDA, SDAO Output Low vs Pull-Up Current (VSDA(OL) vs ISDA) SDA, SDAI, SCL Clamp Voltage vs Load Current ISDA (mA) 0 0.3 0.4 20 0.2 0.1 0 5 10 15 0.5 41511 G09 – 40°C 25°C 85°C ILOAD (mA) 0.01 0.1 1 10 6.2 6.1 6.0 5.9 6.3 41511 G10 – 40°C 85°C 25°C |
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