Datasheet LTC2990 (Analog Devices) - 7

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PIN FUNCTIONS V1 (Pin 1):
First Monitor Input. This pin can be config-
SDA (Pin 6):
Serial Bus Data Input and Output. In the ured as a single-ended input or the positive input for a transmitter mode (Read), the conversion result is output differential or remote diode temperature measurement (in through the SDA pin, while in the receiver mode (Write), combination with V2). When configured for remote diode the device configuration bits are input through the SDA temperature, this pin will source a current. pin. At data input mode, the pin is high impedance; while
V2 (Pin 2):
Second Monitor Input. This pin can be con- at data output mode, it is an open-drain N-channel driver figured as a single-ended input or the negative input for a and therefore an external pull-up resistor or current differential or remote diode temperature measurement (in source to VCC is needed. combination with V1). When configured for remote diode
SCL (Pin 7):
Serial Bus Clock Input. The LTC2990 can temperature, this pin will have an internal termination, only act as a slave and the SCL pin only accepts exter- while the measurement is active. nal serial clock. The LTC2990 does not implement clock
V3 (Pin 3):
Third Monitor Input. This pin can be config- stretching. ured as a single-ended input or the positive input for a
ADR0 (Pin 8):
Serial Bus Address Control Input. The differential or remote diode temperature measurement (in ADR0 pin is an address control bit for the device I2C combination with V4). When configured for remote diode address. See Table 2. temperature, this pin will source a current.
ADR1 (Pin 9):
Serial Bus Address Control Input. The
V4 (Pin 4):
Fourth Monitor Input. This pin can be config- ADR1 pin is an address control bit for the device I2C ured as a single-ended input or the negative input for a address. See Table 2. differential or remote diode temperature measurement (in combination with V3). When configured for remote diode
VCC (Pin 10):
Supply Voltage Input. temperature, this pin will have an internal termination, while the measurement is active.
GND (Pin 5):
Device Circuit Ground. Connect this pin to a ground plane through a low impedance connection. Rev. F For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Pin Functions Functional Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts