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AD6644PCB 数据表(PDF) 4 Page - Analog Devices |
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AD6644PCB 数据表(HTML) 4 Page - Analog Devices |
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4 / 19 page  –4– REV. 0 AD6644–SPECIFICATIONS ENC, ENC D[13:0], OVR DRY N–1 tH_DR tS_DR N N–2 N–3 tS_E tH_E tE_DR tE_FL tE_RL tENC tENCH tENCL N 1 N N 2N 3N 4 tA N AIN N 1 N 2 N 3 N 4 tDR Figure 1. Timing Diagram Test AD6644AST-40/65 Parameter Name Temp Level Min Typ Max Unit DATA READY (DRY 5)/DATA, OVR Data Ready to DATA Delay (Hold Time) 2 tH_DR Note 6 Encode = 65 MSPS (50% Duty Cycle) Full IV 8.0 8.6 9.4 ns Encode = 40 MSPS (50% Duty Cycle) Full IV 12.8 13.4 14.2 ns Data Ready to DATA Delay (Setup Time) 2 tS_DR Note 6 @ 65 MSPS (50% Duty Cycle) Full IV 3.2 5.5 6.5 ns @ 40 MSPS (50% Duty Cycle) Full IV 8.0 10.3 11.3 ns APERTURE DELAY tA 25 °C V 100 ps APERTURE UNCERTAINTY (JITTER) tJ 25 °C V 0.2 ps rms NOTES 1Several timing parameters are a function of t ENC and tENCH. 2To compensate for a change in duty cycle for t H_DR and tS_DR use the following equation: NewtH_DR = (tH_DR – % Change(tENCH)) × t ENC/2 NewtS_DR = (tS_DR – % Change(tENCH)) × t ENC/2. 3ENCODE to DATA Delay (Hold Time) is the absolute minimum propagation delay through the analog-to-digital converter. 4ENCODE to DATA Delay (Setup Time) is calculated relative to 65 MSPS (50% duty cycle). In order to calculate t S_E for a given encode use the following equation: NewtS_E = tENC(NEW) – tENC + tS_E (i.e., for 40 MSPS: NewtS_E(TYP) = 25 × 10–9 – 15.38 × 10–9 + 9.8 × 10–9 = 19.4 × 10 –9). 5DRY is an inverted and delayed version of the encode clock. Any change in the duty cycle of the clock will correspondingly change the duty cycle of DRY. 6Data Ready to DATA Delay(t H_DR and tS_DR) is calculated relative to 65 MSPS (50% duty cycle) and is dependent on t ENC and duty cycle. In order to calculate tH_DR and tS_DR for a given encode use the following equations: NewtH_DR = tENC(NEW)/2 – tENCH + tH_DR (i.e., for 40 MSPS: NewtH_DR(TYP) = 12.5 × 10–9 – 7.69 × 10–9 + 8.6 × 10–9 = 13.4 × 10–9 NewtS_DR = tENC(NEW)/2 – tENCH + tS_DR (i.e., for 40 MSPS: NewtS_DR(TYP) = 12.5 × 10–9 – 7.69 × 10–9 + 5.5 × 10–9 = 10.3 × 10–9. Specifications subject to change without notice. |
类似零件编号 - AD6644PCB |
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类似说明 - AD6644PCB |
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