Datasheet ADT7408 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | ± 2°C Accurate, 12-Bit Digital Temperature Sensor |
| 页数 / 页 | 22 / 4 — ADT7408. Data Sheet. TIMING CHARACTERISTICS. Table 2. Parameter1. Symbol … |
| 修订版 | A |
| 文件格式/大小 | PDF / 445 Kb |
| 文件语言 | 英语 |
ADT7408. Data Sheet. TIMING CHARACTERISTICS. Table 2. Parameter1. Symbol Min Typ Max Unit Test. Conditions/Comments. TIMING DIAGRAM
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ADT7408 Data Sheet TIMING CHARACTERISTICS
TA = −20°C to +125°C, VDD = 3.0 V to 3.6 V, unless otherwise noted.
Table 2. Parameter1 Symbol Min Typ Max Unit Test Conditions/Comments
SCL Clock Frequency fSCL 10 100 kHz Bus Free Time Between a Stop (P) and Start (S) Condition tBUF 4.7 μs Hold Time After (Repeated) Start Condition tHD:STA 4.0 μs After this period, the first clock is generated. Repeated Start Condition Setup Time tSU:STA 4.7 μs High Period of the SCL Clock tHIGH 4.0 50 μs Low Period of the SCL Clock tLOW 4.7 μs Fall Time of Both SDA and SCL Signals tF 300 ns Rise Time of Both SDA and SCL Signals tR 1000 ns Data Setup Time tSU:DAT 250 ns Data Hold Time tHD:DAT 300 ns Setup Time for Stop Condition tSU:STO 4.0 μs Capacitive Load for Each Bus Line, CB 400 pF 1 Guaranteed by design and characterization, not production tested.
TIMING DIAGRAM tR tF VIH SCL tHD:STA VIL tHIGH t tSU:STO LOW t tSU:STA HD:DAT tSU:DAT tR tF VIH t SDA BUF
2
V
00
IL
16- 057
P S S P
Figure 2. SMBus/I2C Timing Diagram Rev. A | Page 4 of 22 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS MODES OF OPERATION REGISTERS ADDRESS POINTER REGISTER (WRITE ONLY) CAPABILITY REGISTER (READ ONLY) CONFIGURATION REGISTER (READ/WRITE) TEMPERATURE TRIP POINT REGISTERS Alarm Temperature Upper Boundary Trip Register (Read/Write) Alarm Temperature Lower Boundary Trip Register (Read/Write) Critical Temperature Trip Register (Read/Write) Temperature Value Register (Read Only) ID REGISTERS Manufacturer ID Register (Read Only) Device ID and Revision Register (Read Only) TEMPERATURE DATA FORMAT 12-Bit Temperature Data Format 10-Bit Temperature Data Format EVENT PIN FUNCTIONALITY Event Thresholds Alarm Window Trip Critical Trip Interrupt Mode Comparator Mode SERIAL INTERFACE Serial Bus Address SMBUS/I2C COMMUNICATIONS Writing Data to a Register Reading Data From the ADT7408 Writing to the Pointer Register for a Subsequent Read Reading from Any Pointer Register APPLICATIONS INFORMATION THERMAL RESPONSE TIME SELF-HEATING EFFECTS SUPPLY DECOUPLING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE
TA = −20°C to +125°C, VDD = 3.0 V to 3.6 V, unless otherwise noted.
Table 2. Parameter1 Symbol Min Typ Max Unit Test Conditions/Comments
SCL Clock Frequency fSCL 10 100 kHz Bus Free Time Between a Stop (P) and Start (S) Condition tBUF 4.7 μs Hold Time After (Repeated) Start Condition tHD:STA 4.0 μs After this period, the first clock is generated. Repeated Start Condition Setup Time tSU:STA 4.7 μs High Period of the SCL Clock tHIGH 4.0 50 μs Low Period of the SCL Clock tLOW 4.7 μs Fall Time of Both SDA and SCL Signals tF 300 ns Rise Time of Both SDA and SCL Signals tR 1000 ns Data Setup Time tSU:DAT 250 ns Data Hold Time tHD:DAT 300 ns Setup Time for Stop Condition tSU:STO 4.0 μs Capacitive Load for Each Bus Line, CB 400 pF 1 Guaranteed by design and characterization, not production tested.
TIMING DIAGRAM tR tF VIH SCL tHD:STA VIL tHIGH t tSU:STO LOW t tSU:STA HD:DAT tSU:DAT tR tF VIH t SDA BUF
2
V
00
IL
16- 057
P S S P
Figure 2. SMBus/I2C Timing Diagram Rev. A | Page 4 of 22 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS MODES OF OPERATION REGISTERS ADDRESS POINTER REGISTER (WRITE ONLY) CAPABILITY REGISTER (READ ONLY) CONFIGURATION REGISTER (READ/WRITE) TEMPERATURE TRIP POINT REGISTERS Alarm Temperature Upper Boundary Trip Register (Read/Write) Alarm Temperature Lower Boundary Trip Register (Read/Write) Critical Temperature Trip Register (Read/Write) Temperature Value Register (Read Only) ID REGISTERS Manufacturer ID Register (Read Only) Device ID and Revision Register (Read Only) TEMPERATURE DATA FORMAT 12-Bit Temperature Data Format 10-Bit Temperature Data Format EVENT PIN FUNCTIONALITY Event Thresholds Alarm Window Trip Critical Trip Interrupt Mode Comparator Mode SERIAL INTERFACE Serial Bus Address SMBUS/I2C COMMUNICATIONS Writing Data to a Register Reading Data From the ADT7408 Writing to the Pointer Register for a Subsequent Read Reading from Any Pointer Register APPLICATIONS INFORMATION THERMAL RESPONSE TIME SELF-HEATING EFFECTS SUPPLY DECOUPLING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE