# CN0217

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### 电路描述

Table 1. Output Series Resistance, Rout, vs. Excitation Range for VDD = 3.3 V Supply Voltage

 Range Output Excitation Amplitude Output Resistance, Rout Range 1 Range 2 Range3 Range4 1.98 V p-p 0.97 V p-p 0.383 V p-p 0.198 V P-P 200 Ω typ 2.4 k Ω typ 1.0 k Ω typ 600 Ω typ

Table 2. Output Levels and Respective DC Bias for VDD = 3.3 V Supply Voltage

 Range Output Excitation Amplitude Output DC Bias Level 1 2 3 4 1.98 V p-p 0.97 V p-p 0.383 V p-p 0.198 V p-p 1.48 0.76 0.31 0.173

### 电路评估与测试

Table 1. Low Impedance Range Setup for VDD = 3.3 V Supply Voltage

 Parameter Value V p-p Number of Settling Time Cycles MCLK RCAL RFB Excitation Frequency Range Unknowe Impedances 1.98 V (Range 1) 15 16 MHz 20.1 Ω 20.0 Ω 30 kHz to 30.2 kHz R1=10.3 Ω, R2=30.0 Ω, C3=1 µF (Zc=5.3 Ω at 30 kHz )

Table 2. kΩ Impedance Range Setup for VDD = 3.3 V Supply Voltage

 Parameter Value V p-p Number of Settling Time Cycles MCLK RCAL RFB Excitation Frequency Range Unknown Impedances 0.198 V (Range 4) 15 16 MHz 99.85 kΩ 100 kΩ 30 kHz to 50 kHz R0 = 99.85 kΩ R1 = 29.88 kΩ R2 = 14.95 kΩ R3 = 8.21 kΩ R4 = 217.25 kΩ C5 = 150 pF (Zc = 26.5 kΩ at 40 kHz) C6 = 47 pF (Zc = 84.6 kΩ at 40 kHz)

R||C型结构也通常用于测量，，采用1 kΩ的RCAL、10 kΩ的R和10 nF的C，在频率范围4 kHz至100 kHz内进行测量。图11和12所示曲线表示幅度和相位结果和理想值的关系。

Table 3. RIIC Impedance Range Setup for VDD = 3.3 V Supply Voltage

 Parameter Value V p-p Number of Settling Time Cycles MCLK RCAL RFB Excitation Frequency Range Unknown Impedance RIIC 0.383 V (Range 3) 15 16 MHz 1 kΩ 1 kΩ 4 kHz to 100 kHz R = 10 kΩ C = 10 nF

Table 4. Link Connections for EVAL-CN0217-EB1Z

 Link Number Default Position LK1 Open LK2 Open LK3 Open LK4 Insert LK5 Insert LK6 A