LTC2991I(RevA) Просмотр технического описания (PDF) - Linear Technology

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LTC2991I
(Rev.:RevA)

Octal I2C Voltage, Current, and Temperature Monitor

Linear Technology 

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

for a differential or remote diode temperature measurement

(in combination with V2). Differential common mode range

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

configured for remote diode temperature, this pin will have

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

for a differential or remote diode temperature measurement

(in combination with V4). Differential common mode range

is 0V to VCC, ±300mV differential. When configured for

remote diode temperature, this pin will source a current.

V4 (Pin 4): Fourth Monitor Input. This pin can be configured

as a single-ended input (0V to 4.9V) or the negative input

for a differential or remote diode temperature measurement

(in combination with V3). Differential common mode range

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

for a differential or remote diode temperature measurement

(in combination with V6). Differential common mode range

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

for a differential or remote diode temperature measurement

(in combination with V5). Differential common mode range

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 (Pin 8): Eighth Monitor Input. This pin can be configured

as a single-ended input (0V to 4.9V) or the negative input

for a differential or remote diode temperature measurement

(in combination with V7). Differential common mode range

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. www.DataSheet.net/ 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.

8

2991fa

Datasheet pdf - http://www.DataSheet4U.co.kr/

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