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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AD7329 데이터시트(PDF) 7 Page - Analog Devices |
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AD7329 데이터시트(HTML) 7 Page - Analog Devices |
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7 / 40 page  AD7329 Rev. 0 | Page 7 of 40 TIMING SPECIFICATIONS VDD = 12 V to 16.5 V, VSS = −12 V to −16.5 V, VCC = 4.75 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V, VREF = 2.5 V internal/external, TA = TMAX to TMIN. Timing specifications apply with a 32 pF load, unless otherwise noted. MUXOUT+ is connected directly to ADCIN+ and MUXOUT −is connected directly to ADCIN−, which is connected to GND for single-ended mode. Table 3. Limit at TMIN, TMAX Description Parameter VCC < 4.75 V VCC = 4.75 V to 5.25 V Unit VDRIVE ≤ VCC fSCLK 50 50 kHz min 14 20 MHz max tCONVERT 16 × tSCLK 16 × tSCLK ns max tSCLK = 1/fSCLK tQUIET 75 60 ns min Minimum time between end of serial read and next falling edge of CS t1 12 5 ns min Minimum CS pulse width t21 25 20 ns min CS to SCLK set-up time; bipolar input ranges (±10 V, ±5 V, ±2.5 V) 45 35 ns min Unipolar input range (0 V to 10 V) t3 26 14 ns max Delay from CS until DOUT three-state disabled t4 57 43 ns max Data access time after SCLK falling edge t5 0.4 × tSCLK 0.4 × tSCLK ns min SCLK low pulse width t6 0.4 × tSCLK 0.4 × tSCLK ns min SCLK high pulse width t7 13 8 ns min SCLK to data valid hold time t8 40 22 ns max SCLK falling edge to DOUT high impedance 10 9 ns min SCLK falling edge to DOUT high impedance t9 4 4 ns min DIN set-up time prior to SCLK falling edge t10 2 2 ns min DIN hold time after SCLK falling edge tPOWER-UP 750 750 ns max Power-up from autostandby 500 500 μs max Power-up from full shutdown/autoshutdown mode, internal reference 25 25 μs typ Power-up from full shutdown/autoshutdown mode, external reference 1 When using VCC = 4.75 V to 5.25 V and the 0 V to 10 V unipolar range, running at 1 MSPS throughput rate with t2 at 20 ns, the mark space ratio needs to be limited to 50:50. ADD1 12 34 5 13 14 15 16 WRITE REG SEL1 REG SEL2 LSB 0 MSB ADD0 SIGN DB11 DB10 DB2 DB1 DB0 t2 t6 t4 t9 t10 t3 t7 t5 t8 t1 tQUIET tCONVERT SCLK CS DOUT THREE- STATE THREE-STATE DIN ADD2 3 IDENTIFICATION BITS Figure 2. Serial Interface Timing Diagram |
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