Datasheet AD7991, AD7995, AD7999 (Analog Devices) - 9
| Fabricante | Analog Devices |
| Descripción | 4-Channel, 8-Bit ADC with I2C Compatible Interface in 8-Lead SOT-23 |
| Páginas / Página | 28 / 9 — AD7991/AD7995/AD7999. I2C TIMING SPECIFICATIONS. Table 5. Limit at tMIN, … |
| Revisión | C |
| Formato / tamaño de archivo | PDF / 615 Kb |
| Idioma del documento | Inglés |
AD7991/AD7995/AD7999. I2C TIMING SPECIFICATIONS. Table 5. Limit at tMIN, tMAX. Parameter Conditions. Min. Typ Max Unit Description
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AD7991/AD7995/AD7999 I2C TIMING SPECIFICATIONS
Guaranteed by initial characterization. All values were measured with the input filtering enabled. CB refers to the capacitive load on the bus line, with tr and tf measured between 0.3 VDD and 0.7 VDD (see Figure 2). Unless otherwise noted, VDD = 2.7 V to 5.5 V and TA = TMIN to TMAX.
Table 5. Limit at tMIN, tMAX Parameter Conditions Min Typ Max Unit Description
f 1 SCL Standard mode 100 kHz Serial clock frequency Fast mode 400 kHz High speed mode CB = 100 pF maximum 3.4 MHz CB = 400 pF maximum 1.7 MHz t 1 1 Standard mode 4 μs tHIGH, SCL high time Fast mode 0.6 μs High speed mode CB = 100 pF maximum 60 ns CB = 400 pF maximum 120 ns t 1 2 Standard mode 4.7 μs tLOW, SCL low time Fast mode 1.3 μs High speed mode CB = 100 pF maximum 160 ns CB = 400 pF maximum 320 ns t 1 3 Standard mode 250 ns tSU;DAT, data setup time Fast mode 100 ns High speed mode 10 ns t 1, 2 4 Standard mode 0 3.45 μs tHD;DAT, data hold time Fast mode 0 0.9 μs High Speed mode CB = 100 pF maximum 0 703 ns CB = 400 pF maximum 0 150 ns t 1 5 Standard mode 4.7 μs tSU;STA, setup time for a repeated start condition Fast mode 0.6 μs High Speed mode 160 ns t 1 6 Standard mode 4 μs tHD;STA, hold time for a repeated start condition Fast mode 0.6 μs High speed mode 160 ns t 1 7 Standard mode 4.7 μs tBUF, bus-free time between a stop and a start condition Fast mode 1.3 μs t 1 8 Standard mode 4 μs tSU;STO, setup time for a stop condition Fast mode 0.6 μs High speed mode 160 ns t9 Standard mode 1000 ns tRDA, rise time of the SDA signal Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF maximum 10 80 ns CB = 400 pF maximum 20 160 ns Rev. B | Page 9 of 28 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AD7991 AD7995 AD7999 I2C TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CONVERTER OPERATION ADC Transfer Function TYPICAL CONNECTION DIAGRAM ANALOG INPUT INTERNAL REGISTER STRUCTURE CONFIGURATION REGISTER SAMPLE DELAY AND BIT TRIAL DELAY CONVERSION RESULT REGISTER SERIAL INTERFACE SERIAL BUS ADDRESS WRITING TO THE AD7991/AD7995/AD7999 READING FROM THE AD7991/AD7995/AD7999 PLACING THE AD7991/AD7995/AD7999 INTO HIGH SPEED MODE MODE OF OPERATION OUTLINE DIMENSIONS ORDERING GUIDE
AD7991/AD7995/AD7999 I2C TIMING SPECIFICATIONS
Guaranteed by initial characterization. All values were measured with the input filtering enabled. CB refers to the capacitive load on the bus line, with tr and tf measured between 0.3 VDD and 0.7 VDD (see Figure 2). Unless otherwise noted, VDD = 2.7 V to 5.5 V and TA = TMIN to TMAX.
Table 5. Limit at tMIN, tMAX Parameter Conditions Min Typ Max Unit Description
f 1 SCL Standard mode 100 kHz Serial clock frequency Fast mode 400 kHz High speed mode CB = 100 pF maximum 3.4 MHz CB = 400 pF maximum 1.7 MHz t 1 1 Standard mode 4 μs tHIGH, SCL high time Fast mode 0.6 μs High speed mode CB = 100 pF maximum 60 ns CB = 400 pF maximum 120 ns t 1 2 Standard mode 4.7 μs tLOW, SCL low time Fast mode 1.3 μs High speed mode CB = 100 pF maximum 160 ns CB = 400 pF maximum 320 ns t 1 3 Standard mode 250 ns tSU;DAT, data setup time Fast mode 100 ns High speed mode 10 ns t 1, 2 4 Standard mode 0 3.45 μs tHD;DAT, data hold time Fast mode 0 0.9 μs High Speed mode CB = 100 pF maximum 0 703 ns CB = 400 pF maximum 0 150 ns t 1 5 Standard mode 4.7 μs tSU;STA, setup time for a repeated start condition Fast mode 0.6 μs High Speed mode 160 ns t 1 6 Standard mode 4 μs tHD;STA, hold time for a repeated start condition Fast mode 0.6 μs High speed mode 160 ns t 1 7 Standard mode 4.7 μs tBUF, bus-free time between a stop and a start condition Fast mode 1.3 μs t 1 8 Standard mode 4 μs tSU;STO, setup time for a stop condition Fast mode 0.6 μs High speed mode 160 ns t9 Standard mode 1000 ns tRDA, rise time of the SDA signal Fast mode 20 + 0.1 CB 300 ns High speed mode CB = 100 pF maximum 10 80 ns CB = 400 pF maximum 20 160 ns Rev. B | Page 9 of 28 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AD7991 AD7995 AD7999 I2C TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CONVERTER OPERATION ADC Transfer Function TYPICAL CONNECTION DIAGRAM ANALOG INPUT INTERNAL REGISTER STRUCTURE CONFIGURATION REGISTER SAMPLE DELAY AND BIT TRIAL DELAY CONVERSION RESULT REGISTER SERIAL INTERFACE SERIAL BUS ADDRESS WRITING TO THE AD7991/AD7995/AD7999 READING FROM THE AD7991/AD7995/AD7999 PLACING THE AD7991/AD7995/AD7999 INTO HIGH SPEED MODE MODE OF OPERATION OUTLINE DIMENSIONS ORDERING GUIDE