Rainbow-electronics DS1722 Manual de usuario

1 of 13 021500FEATURES Temperature measurements require noexternal components Measures temperatures from -55°C to+120°C. Fahrenheit equivalent is

DS172210 of 13ELECTRICAL CHARACTERISTICS: DIGITAL THERMOMETER(-55°°°°C to +120°°°°C, 2.65V ≤≤≤≤====VDDA ≤≤≤≤====5.5V)PARAMETER SYMBOL CONDITION MIN TY

DS172211 of 13TIMING DIAGRAM: 3-WIRE WRITE DATA TRANSFER Figure 10*I/O is SDI and SDO tied together.AC ELECTRICAL CHARACTERISTICS: SPI Interface(-55°

DS172212 of 13TIMING DIAGRAM: SPI WRITE DATA TRANSFER Figure 12*SCLK can be either polarity, timing shown for CPOL = 1.NOTES:1. All voltages are ref

DS172213 of 13TYPICAL DS1722 THERMOMETER ERROR

DS17222 of 13DETAILED PIN DESCRIPTION Table 1SOIC SYMBOL DESCRIPTIONPIN 1VDDDDigital Supply Voltage 1.8V-5.5V. Defines the top rails for the digital

DS17223 of 13The DS1722 can communicate using either a Motorola Serial Peripheral Interface (SPI) or standard 3-wire interface. The user can select e

DS17224 of 13The resolution of the temperature conversion is configurable (8, 9, 10, 11, or 12 bits), with 9-bit readingsthe default state. This equa

DS17225 of 13CONFIGURATION REGISTER PROGRAMMINGThe configuration register is accessed in the DS1722 with the 00h address for reads and the 80h address

DS17226 of 13The SDI and SDO pins are the serial data input and output pins for the DS1722, respectively. The CEinput is used to initiate and termina

DS17227 of 13ADDRESS AND DATA BYTESAddress and data bytes are shifted MSB first into the serial data input (SDI) and out of the serial dataoutput (SDO

DS17228 of 13SPI MULTIPLE BYTE BURST TRANSFER Figure 63-WIRE SERIAL DATA BUSThe 3-wire communication mode operates similar to the SPI mode. However,

DS17229 of 13ABSOLUTE MAXIMUM RATINGS*Voltage on V DD , Relative to Ground -0.3V to +6.0VVoltage on any other pin, Relative to Ground -0.3V to +6.0V