Datasheet ADT7316, ADT7317, ADT7318 (Analog Devices)

ПроизводительAnalog Devices
Описание±0.5°C Accurate Digital Temperature Sensor and Quad Voltage Output 8-Bit DACs
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±0.5°C Accurate Digital Temperature Sensor. and Quad Voltage Output 12-/10-/8-Bit DACs. ADT7316/ADT7317/ADT7318. FEATURES

Datasheet ADT7316, ADT7317, ADT7318 Analog Devices, Версия: B

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SENSOR TEMP I2C/SMBUS SPI 16QSOP
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±0.5°C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs ADT7316/ADT7317/ADT7318 FEATURES PIN CONFIGURATION ADT7316—four 12-bit DACs V 1 16 OUT-B VOUT-C ADT7317—four 10-bit DACs V 2 15 OUT-A VOUT-D ADT7318—four 8-bit DACs V 3 ADT7316/ 14 REF-AB VREF-CD Buffered voltage output ADT7317/ CS 4 13 SCL/SCLK ADT7318 Guaranteed monotonic by design over all codes GND 5 TOP VIEW 12 SDA/DIN 10-bit temperature-to-digital converter (Not to Scale) V 6 11 DD DOUT/ADD Temperature range: −40°C to +120°C D+ 7 10 INT/INT Temperature sensor accuracy of ±0.5°C 8 9 D– LDAC
06 0 1-
Supply range: 2.7 V to 5.5 V
66 02
DAC output range: 0 V to 2 VREF
Figure 1.
Power-down current : <10 μA Internal 2.28 VREF option Double-buffered input logic Buffered/unbuffered reference input option Power-on reset to 0 V Simultaneous update of outputs (LDAC function) On-chip rail-to-rail output buffer amplifier I2C®-, SMBus-, SPI®-, QSPI™-, MICROWIRE™-, and DSP- compatible 4-wire serial interface SMBus packet error checking (PEC) compatible 16-lead QSOP APPLICATIONS Portable battery-powered instruments Personal computers Telecommunications systems Electronic test equipment Domestic appliances Process control GENERAL DESCRIPTION
The ADT7316/ADT7317/ADT73181combine a 10-bit The reference for the four DACs is derived either internally temperature-to-digital converter and a quad 12-/10-/8-bit or from two reference pins (one per DAC pair). The outputs DAC, respectively, in a 16-lead QSOP. This includes a band of all DACs may be updated simultaneously using the software gap temperature sensor and a 10-bit ADC to monitor and LDAC function or external LDAC pin. The ADT7316/ADT7317/ digitize the temperature reading to a resolution of 0.25°C. The ADT7318 incorporate a power-on-reset circuit that ensures the ADT7316/ ADT7317/ADT7318 operate from a single 2.7 V to DAC output powers up to 0 V and remains there until a valid 5.5 V supply. The output voltage of the DAC ranges from 0 V write takes place. to 2 VREF, with an output voltage settling time of 7 μs typically. The ADT7316/ADT7317/ADT7318 wide supply voltage range, The ADT7316/ ADT7317/ADT7318 provide two serial inter- low supply current, and SPI-/I2C-compatible interface make face options, a 4-wire serial interface that is compatible with them ideal for a variety of applications, including personal SPI, QSPI, MICROWIRE, and DSP interface standards, and a computers, office equipment, and domestic appliances. 2-wire SMBus/I2C interface. They feature a standby mode that 1 Protected by the following U.S. patent numbers: 5,764,174; 5,867,012; is controlled via the serial interface. 6,097,239; 6,169,442.
Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2003–2007 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS FUNCTIONAL BLOCK DIAGRAM DAC AC CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER-UP CALIBRATION CONVERSION SPEED FUNCTIONAL DESCRIPTION—VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTERS DIGITAL-TO-ANALOG SECTION RESISTOR STRING DAC EXTERNAL REFERENCE INPUTS OUTPUT AMPLIFIER THERMAL VOLTAGE OUTPUT Negative Temperatures Positive Temperatures FUNCTIONAL DESCRIPTION—MEASUREMENT TEMPERATURE SENSOR VDD MONITORING ON-CHIP REFERENCE ROUND ROBIN MEASUREMENT SINGLE-CHANNEL MEASUREMENT TEMPERATURE MEASUREMENT METHOD Internal Temperature Measurement External Temperature Measurement TEMPERATURE VALUE FORMAT Temperature Conversion Formula INTERRUPTS REGISTERS REGISTER DESCRIPTIONS SERIAL INTERFACE SERIAL INTERFACE SELECTION I2C SERIAL INTERFACE Writing to the ADT7316/ADT7317/ADT7318 Writing to the Address Pointer Register for a Subsequent Read Writing Data to a Register Reading Data from the ADT7316/ADT7317/ADT7318 SPI SERIAL INTERFACE Write Operation Read Operation SMBUS/SPI INT/ SMBUS Alert Response LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE