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LOG300 Datasheet(PDF) 3 Page - Texas Instruments |
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LOG300 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 32 page  4 Pin Configuration and Functions 1 AFE_En 16 LNA_In 2 DGND 15 Offset_Cap 3 LNA_En 14 LNA_Out 4 VCC 13 AGND 5 Log_Out 12 Log_Inp 6 Ref_Res 11 Log_Inm 7 Freq_Supply 10 Buffer 8 Freq_Out 9 Inv_Buffer Not to scale Figure 4-1. D Package, 16-Pin SOIC (top view) 1 VCC 12 Offset_Cap 2 Log_Out 11 LNA_Out 3 Ref_Res 10 AGND 4 Freq_Supply 9 Log_Inp Not to scale Thermal Pad Figure 4-2. RGT Package, 16-Pin VQFN (top view) Table 4-1. Pin Functions PIN TYPE(1) DESCRIPTION NAME NO. D (SOIC) RGT (VQFN) AFE_En 1 14 I LNA and Log Detector block enable and disable pin. AFE_En = High for AFE enable. Floating this pin keeps both blocks enabled as well. AGND 13 10 P Analog ground for LNA and Log detector block Buffer 10 7 O Noninverting buffered output. VBuffer = VLog_Out × 2. DGND 2 15 P Digital ground for Freq_Out pin Freq_Out 8 5 O This pin toggles at the same signal frequency applied at the Log_In. Freq_Supply 7 4 P Power supply for Freq_Out function. Float this pin if the frequency-detection feature is not required. Inv_Buffer 9 6 O Inverted buffered output. VInv_Buffer = VCC – VLog_Out × 2. LNA_En 3 16 I Low-noise amplifier enable and disable. LNA_En = High for LNA enable. Floating this pin keeps the LNA enabled as well. LNA_In 16 13 I Low-noise amplifier input LNA_Out 14 11 O Low-noise amplifier output Log_Inm 11 8 I Inverting input of Log Detector block. Connect an appropriate capacitor to ground when used in a single-ended input. Refer to Section 7.3.2. Log_Inp 12 9 I Noninverting input of Log Detector block Log_Out 5 2 O Unbuffered output of Log Detector block. Connect an appropriate resistor RF (to set the input to output slope) and capacitor CF (to set the response time). Offset_Cap 15 12 I Connect a recommended capacitor from this pin to ground. This capacitor sets the pole of the internal offset correction loop. Refer to Section 7.3.1 for the recommended capacitor. Ref_Res 6 3 I Connect a 1% 56kΩ resistor to this pin. Float this pin if the default relaxed slope accuracy is acceptable. VCC 4 1 P Supply Thermal Pad — Thermal Pad P Thermal pad. Electrically isolated from the device. Connect to a heat spreading plane, typically ground. (1) I = input, O = output, I/O = input or output, G = ground, P = power. www.ti.com LOG300 SLOSEB7A – SEPTEMBER 2024 – REVISED OCTOBER 2024 Copyright © 2024 Texas Instruments Incorporated Submit Document Feedback 3 Product Folder Links: LOG300 |
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