at
TA = 25°C, VCC = 5V, CF = 1nF, RF = 43kΩ (slope
= 43mV/dB) and Ref_Res = 1% 56kΩ, and 10nF capacitor to AGND on Log_Inp and Log_Inm,
(unless otherwise noted). For AFE, 2nd-order BPF centered around frequency "f" with
gain = -7dB used between LNA and Log Detector block.
Figure 5-1 Log
Detector Slope at Various Frequencies Figure 5-3 AFE
Slope at Various Frequencies Figure 5-5 Log
Detector Slope at Different Temperature Points Figure 5-7 Log
Detector Slope at Different Temperature Points Figure 5-9 Log
Detector Slope Variation with Input Signal Frequency
Ref_Res = 56kΩ |
μ = 43.55mV/dB |
σ = 0.44mV/dB |
Figure 5-11 Log
Detector Slope Histogram with Ref_Res
LCE = ±1dB, f = 1MHz |
μ =
22.15μVP |
σ =
1.59μVP |
Figure 5-13 Minimum Input Sensitivity of Log_Detector
50Ω + 10nF at Log_Inp to
AGND |
μ = 0.19V |
σ = 0.04V |
Figure 5-15 Minimum Output Voltage at Log_Out Figure 5-17 Minimum Log_Out Voltage vs Time Figure 5-19 Log Detector Rise and Fall
Time Figure 5-21 Log
Detector Rise and Fall Time Figure 5-23 Small-Signal Step Response: Inverting Buffer Figure 5-25 Large-Signal Step Response: Inverting Buffer Figure 5-27 LNA
Overdrive Recovery Figure 5-29 Frequency Detector Output Waveform Figure 5-31 Log
Detector Output Stage Overdrive Figure 5-2 Log
Conformance Error for Different Frequencies Figure 5-4 AFE
Log Conformance Error for Different Frequencies Figure 5-6 Log
Conformance Error for Different Temperature Points Figure 5-8 Log
Conformance Error for Different Temperature Points Figure 5-10 Log
Detector Slope Variation vs Supply
Ref_Res = Open |
μ = 42.03mV/dB |
σ = 0.53mV/dB |
Figure 5-12 Log
Detector Slope Histogram without Ref_Res
LCE = ±2dB, f = 20MHz |
μ =
22.14μVP |
σ =
1.67μVP |
Figure 5-14 Minimum Input Sensitivity of Log_Detector
10nF at Log_Inp to
AGND |
μ = 0.15V |
σ = 0.04V |
Figure 5-16 Minimum Output Voltage at Log_Out Figure 5-18 Slope Variation vs
Temperature Figure 5-20 Log
Detector Rise and Fall Time Figure 5-22 Small-Signal Step Response: Buffer Figure 5-24 Large-Signal Step Response: Buffer Figure 5-26 Log
Detector Slope for Various Input Waveforms Figure 5-28 AFE Overdrive Recovery
CF = 200pF , Log_Inp =
4VP |
Figure 5-30 Log
Detector Input Stage Overdrive
AFE; BPF = 80kHz, RC filter on VCC of
R = 50Ω, C = 12µF |
Figure 5-32 Output vs 100mVpp Ripple Injected on VCC