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AS1122 数据表(PDF) 6 Page - ams AG |
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AS1122 数据表(HTML) 6 Page - ams AG |
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6 / 23 page ![]() www.austriamicrosystems.com/LED-Driver-ICs Revision 1.00 5 - 22 AS1122 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s Timing Characteristics VDD = +2.7V to +3.6V, TAMB = -40°C to +85ºC. Typical values are at TAMB = +25°C, VDD = 3.3V (unless otherwise specified). Interface Characteristics VDD = +2.7V to +3.6V, TAMB = -40°C to +85ºC. Typical values are at TAMB = +25°C, VDD = 3.3V (unless otherwise specified). Figure 3. Load Circuit for Digital Output Timing Specifications Table 4. Output Timing Characteristics Symbol Parameter Conditions Min Typ Max Unit tR_OUT Rise Time OUT 1 1. Value can be factory trimmed for EMI improvement. 20 ns tF_OUT Fall Time OUT 1 20 ns tD 2 2. See Figure 24 on page 10. Average Output Delay Time (can be turned off on request) 25 ns Table 5. Serial Interface Timing Characteristics Symbol Parameter Conditions Min Typ Max Unit fOSC Oscillator Frequency 8 10 12 MHz fCLK Data Shift Clock Frequency 1 5 MHz tLOW 1 1. See Figure 24 on page 10 CLK low time during data shift 1 s tCAPT 1 CLK low time for data capture 1.5 1.8 2.85 s tSETUP 2 2. See Figure 36 on page 16 and Figure 37 on page 16 Setup Time SDI, CLKI 12 ns tHOLD 2 Hold Time SDI, CLKI 12 ns tPD_rising 2 Delay CLKI to CLKO 3 3. Guaranteed by design and not production tested. rising CLKI to rising CLKO 2 3.5 8 ns tPD_falling 2 Delay CLKI to CLKO 3 rising CLKI to falling CLKO 72 103.5 138 ns tPD_SDO 2 Delay CLKO to SDO 3 falling edge CLKO 0.8 1.5 3 ns tH_CLKO 2 High Time of CLKO 3 70 100 130 ns tR_CLK Rise Time CLK 3 CLOAD = 20pF 10 ns tR_DATA Rise Time Data 3 CLOAD = 20pF 10 ns CLOAD 20pF SDO CLKO VDD/2 200µA IOL 200µA IOH |
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