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LTC2991 Datasheet(PDF) 8 Page - Linear Technology |
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LTC2991 Datasheet(HTML) 8 Page - Linear Technology |
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8 / 32 page  LTC2991 8 2991fd For more information www.linear.com/LTC2991 pin FuncTions V1 (Pin 1): First Monitor Input. This pin can be configured as a single-ended input (0V to 4.9V) or the positive input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV2).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will source a current. V2 (Pin 2): Second Monitor Input. This pin can be config- ured as a single-ended input (0V to 4.9V) or the negative input for a differential or remote diode temperature mea- surement (in combination with V1). Differential common mode range is 0V to VCC, ±300mV differential. When configuredforremotediodetemperature,thispinwillhave an internal termination, while the measurement is active. V3 (Pin 3): Third Monitor Input. This pin can be configured as a single-ended input (0V to 4.9V) or the positive input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV4).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will source a current. V4(Pin4):FourthMonitorInput.Thispincanbeconfigured as a single-ended input (0V to 4.9V) or the negative input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV3).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will have an internal termination, while the measurement is active. V5 (Pin 5): Fifth Monitor Input. This pin can be configured as a single-ended input (0V to 4.9V) or the positive input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV6).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will source a current. V6 (Pin 6): Sixth Monitor Input. This pin can be configured as a single-ended input (0V to 4.9V) or the negative input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV5).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will have an internal termination, while the measurement is active. V7 (Pin 7): Seventh Monitor Input. This pin can be configured as a single-ended input (0V to 4.9V) or the positive input for a differential or remote diode tempera- ture measurement (in combination with V8). Differential common mode range is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will source a current. V8(Pin8):EighthMonitorInput.Thispincanbeconfigured as a single-ended input (0V to 4.9V) or the negative input foradifferentialorremotediodetemperaturemeasurement (incombinationwithV7).Differentialcommonmoderange is 0V to VCC, ±300mV differential. When configured for remote diode temperature, this pin will have an internal termination, while the measurement is active. GND (Pin 9): Device Ground. Connect this pin through a low impedance connection to system ground. SDA (Pin 10): Serial Bus Data Input and Output. In the transmitter mode (read), the conversion result is output through the SDA pin, while in the receiver mode (write), the device configuration bits are input through the SDA pin. At data input mode, the pin is high impedance; while at data output mode, it is an open-drain N-channel driver and, therefore, an external pull-up resistor or current source to VCC is needed. SCL (Pin 11): Serial Bus Clock Input of the I2C Interface. The LTC2991 can only act as a slave and the SCL pin only accepts external serial clock. The LTC2991 does not implement clock stretching. PWM (Pin 12): PWM Output. The PWM pin provides a CMOS output level with a duty cycle proportional to the remote diode temperature of the sensor connected to pins V7 and V8. ADR0, ADR1, ADR2 (Pins 13, 14, 15): Serial Bus Address Control Input. The ADR pins are address control bits for the device I2C address. See Table 1. VCC (Pin 16): Chip Power. Connect to 2.9V to 5.5V low noise supply. A 0.1µF decoupling capacitor to GND is required for this pin. |
Similar Part No. - LTC2991_15 |
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Similar Description - LTC2991_15 |
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