5.8 Typical Characteristics: VCC = 5V (continued)

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.

f = 1MHz, CF = 1nF

Figure 5-19. Log Detector Rise and Fall Time

f = 1MHz, CF = 10nF

Figure 5-20. Log Detector Rise and Fall Time

f = 1MHz, CF = 100pF

Figure 5-21. Log Detector Rise and Fall Time

Log_Inp (VP)

0

1

2

3

4

5

10



100



1m

10m

100m

1

Log_Inp Input Waveform

Sine

Square

Triangle

f = 1MHz

Figure 5-22. Log Detector output for Various Input Waveforms

Time (2

s/div)

0.48

0.99

0.5

1.02

0.52

1.05

0.54

1.08

0.56

1.11

Buffer

Input

Output

Figure 5-23. Small-Signal Step Response: Buffer

Time (2

s/div)

1.42

1.9

1.43

1.92

1.44

1.94

1.45

1.96

1.46

1.98

1.47

2

1.48

2.02

1.49

2.04

1.5

2.06

1.51

2.08

1.52

2.1

Buffer

Input

Output

Figure 5-24. Small-Signal Step Response: Inverting Buffer

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LOG300

SLOSEB7A – SEPTEMBER 2024 – REVISED OCTOBER 2024

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