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AT30TS750A 데이터시트 PDF




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기능 Digital Temperature Sensor
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AT30TS750A 데이터시트, 핀배열, 회로
AT30TS750A
9- to 12-bit Selectable, ±0.5°C Accurate
Digital Temperature Sensor with Nonvolatile Registers
DATASHEET
Features
Single 1.7V to 5.5V supply
Measures temperature from -55C to +125C
Highly accurate temperature measurements requiring no external components
±0.5°C accuracy (typical) over the 0C to +85C range
±1.0°C accuracy (typical) over the -25C to +105C range
±2.0°C accuracy (typical) over the -40C to +125C range
User-configurable resolution
9 to 12 bits (0.5C to 0.0625C)
User-configurable high and low temperature limits
Nonvolatile registers to retain user-configured or pre-defined power-up defaults
Register locking to prevent erroneous misconfiguration
Register lockdown for permanent, non-changeable device configuration
ALERT output pin for indicating temperature alarms
2-wire I2C and SMBuscompatible serial interface
Supports SMBus Timeout
Supports SMBus Alert and Alert Response Address (ARA)
Selectable addressing allows up to eight devices on the same bus
Built-in noise suppression filtering for clock and data input signals
Low power dissipation
75μA active current (typical) during temperature measurements
Shutdown mode to minimize power consumption
1μA shutdown current (typical)
One-Shot mode for single temperature measurement while in Shutdown mode
Pin and software compatible to industry-standard LM75-type devices
Industry standard green (Pb/Halide-free/RoHS compliant) package options
8-lead SOIC (150-mil)
8-lead MSOP (3.0 x 3.0mm)
8-pad Ultra Thin DFN (UDFN — 2.0 x 3.0 x 0.6mm)
Atmel-8855F-DTS-AT30TS750A-Datasheet_102014




AT30TS750A pdf, 반도체, 판매, 대치품
1. Description
The Atmel® AT30TS750A is a complete, precise temperature monitoring device designed for use in a variety of
applications that require the measuring of local temperatures as an integral part of the system's function and/or reliability.
The AT30TS750A device combines a high-precision digital temperature sensor, programmable high and low
temperature alarms, and a 2-wire I2C and SMBus (System Management Bus) compatible serial interface into a single,
compact package.
The temperature sensor can measure temperatures over the full -55°C to +125°C temperature range and has a typical
accuracy as precise as ±0.5°C from 0°C to +85°C. The result of the digitized temperature measurements are stored in
one of the AT30TS750A's internal registers, which is readable at any time through the device's serial interface.
The AT30TS750A utilizes flexible, user-programmable internal registers to configure the temperature sensor's
performance and response to high and low temperature conditions. The device also contains a set of Nonvolatile
Registers to retain the configuration and temperature limit settings even after the device has been power cycled, thereby
eliminating the need for the device to be reconfigured after each Power-up operation. This additional flexibility permits
the device to run self-contained and not rely upon a Host controller for device configuration.
A dedicated alarm output activates if the temperature measurement exceeds the user-defined temperature and fault
count limits. To reduce current consumption and save power, the AT30TS750A features a Shutdown mode that turns off
all internal circuitry except for the internal Power-On Reset (POR) and serial interface circuits. The device can also be
configured to power-up in the Shutdown mode to ensure that the device remains in a low-power state until the user
wishes to perform temperature measurements.
The AT30TS750A is factory-calibrated and requires no external components to measure temperature. With it’s flexibility
and high-degree of accuracy, the AT30TS750A is ideal for extended temperature measurements in a wide variety of
communication, computer, consumer, environmental, industrial, and instrumentation applications.
4 AT30TS750A [DATASHEET]
Atmel-8855F-DTS-AT30TS750A-Datasheet_102014

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AT30TS750A 전자부품, 판매, 대치품
4. Device Communication
The AT30TS750A operates as a slave device and utilizes a simple 2-wire I2C and SMBus compatible digital serial
interface to communicate with a Host controller, commonly referred to as the bus Master. The Master initiates and
controls all Read and Write operations to the slave devices on the serial bus, and both the Master and the slave devices
can transmit and receive data on the bus.
The serial interface is comprised of just two signal lines: Serial Clock (SCL) and Serial Data (SDA). The SCL pin is used
to receive the clock signal from the Master, while the bidirectional SDA pin is used to receive command and data
information from the Master as well as to send data back to the Master. Data is always latched into the AT30TS750A on
the rising edge of SCL and always output from the device on the falling edge of SCL. Both the SCL and SDA pin
incorporate integrated spike suppression filters and Schmitt triggers to minimize the effects of input spikes and bus noise.
All command and data information is transferred with the Most-Significant Bit (MSB) first. During bus communication, one
data bit is transmitted every clock cycle, and after eight bits (one byte) of data has been transferred, the receiving device
must respond with either an acknowledge (ACK) or a no-acknowledge (NACK) response bit during a ninth clock cycle
(ACK/NACK clock cycle) generated by the Master; therefore, nine clock cycles are required for every one byte of data
transferred. There are no unused clock cycles during any Read or Write operation, so there must not be any interruptions
or breaks in the data stream during each data byte transfer and ACK or NACK clock cycle.
During data transfers, data on the SDA pin must only change while SCL is low, and the data must remain stable while
SCL is high. If data on the SDA pin changes while SCL is high, then either a Start or a Stop condition will occur. Start and
Stop conditions are used to initiate and end all serial bus communication between the Master and the slave devices. The
number of data bytes transferred between a Start and a Stop condition is not limited and is determined by the Master.
In order for the serial bus to be idle, both the SCL and SDA pins must be in the logic-high state at the same time.
4.1 Start Condition
A Start condition occurs when there is a high-to-low transition on the SDA pin while the SCL pin is stable in the logic-high
state. The Master uses a Start condition to initiate any data transfer sequence, and the Start condition must precede any
command. The AT30TS750A will continuously monitor the SDA and SCL pins for a Start condition, and the device will
not respond unless one is given.
4.2 Stop Condition
A Stop condition occurs when there is a low-to-high transition on the SDA pin while the SCL pin is stable in the logic-high
state. The Master uses the Stop condition to end a data transfer sequence to the AT30TS750A which will subsequently
return to the idle state. The Master can also utilize a repeated Start condition instead of a Stop condition to end the
current data transfer if the Master will perform another operation.
4.3 Acknowledge (ACK)
After every byte of data received, the AT30TS750A must acknowledge to the Master that it has successfully received the
data byte by responding with an ACK. This is accomplished by the Master first releasing the SDA line and providing the
ACK/NACK clock cycle (a ninth clock cycle for every byte). During the ACK/NACK clock cycle, the AT30TS750A must
output a Logic 0 (ACK) for the entire clock cycle such that the SDA line must be stable in the logic-low state during the
entire high period of the clock cycle.
AT30TS750A [DATASHEET]
Atmel-8855F-DTS-AT30TS750A-Datasheet_102014
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관련 데이터시트

부품번호상세설명 및 기능제조사
AT30TS750

Digital Temperature Sensor

ATMEL Corporation
ATMEL Corporation
AT30TS750A

Digital Temperature Sensor

ATMEL Corporation
ATMEL Corporation

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