component
LOG300RGTR
Public Made by Adomby adom
Texas Instruments Special Purpose Amplifiers, VQFN-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLOG300RGTR
Texas Instruments · Special Purpose Amplifiers · VQFN-16(3x3)
LOG300RGTR from Texas Instruments, in a VQFN-16(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Supply pin; recommended supply voltage is 3 V to 5.25 V, with an absolute maximum supply voltage of 5.5 V. |
| 2 | Log_Out | output | Unbuffered output of the Log Detector block; connect a resistor RF to set the input-to-output slope and a capacitor CF to set the response time. |
| 3 | Ref_Res | input | Connect a 1% 56 kΩ resistor to this pin; float it if the default relaxed slope accuracy is acceptable. |
| 4 | Freq_Supply | power_in | Power supply for the Freq_Out function; float this pin if the frequency-detection feature is not required. |
| 5 | Freq_Out | output | Output that toggles at the same signal frequency applied at Log_In. |
| 6 | Inv_Buffer | output | Inverted buffered output, with VInv_Buffer = VCC - VLog_Out × 2. |
| 7 | Buffer | output | Noninverting buffered output, with VBuffer = VLog_Out × 2. |
| 8 | Log_Inm | input | Inverting input of the Log Detector block; connect an appropriate capacitor to ground when used with a single-ended input. |
| 9 | Log_Inp | input | Noninverting input of the Log Detector block. |
| 10 | AGND | power_in | Analog ground for the LNA and Log Detector block. |
| 11 | LNA_Out | output | Low-noise amplifier output. |
| 12 | Offset_Cap | input | Connect a recommended capacitor from this pin to ground; it sets the pole of the internal offset correction loop. |
| 13 | LNA_In | input | Low-noise amplifier input; the absolute maximum LNA input voltage is ±1 VP. |
| 14 | AFE_En | input | LNA and Log Detector block enable and disable pin; High enables the AFE, and floating keeps both blocks enabled. |
| 15 | DGND | power_in | Digital ground for the Freq_Out pin. |
| 16 | LNA_En | input | Low-noise amplifier enable and disable pin; High enables the LNA, and floating keeps the LNA enabled. |
| 17 | Thermal Pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-16(3x3) |
| Category | Amplifiers/Comparators |
| Pins | 17 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (recommended operating) | VCC | 3 | 5.25 | V | Over operating free-air temperature range | 4 | |
| Ambient temperature (recommended operating) | TA | -40 | 25 | 125 | °C | Over operating free-air temperature range | 4 |
| Supply voltage and Freq_Supply (absolute maximum) | VCC | 5.5 | V | Over operating free-air temperature range | 4 | ||
| Supply turn-on and turn-off maximum dV/dT | dV/dT | 1 | V/µs | Supply turn-on and turn-off edge rate | 4 | ||
| LNA input voltage (absolute maximum) | -1 | 1 | VP | LNA_In | 4 | ||
| Continuous input current for all pins (absolute maximum) | II | -10 | 10 | mA | Continuous input current for all pins | 4 | |
| Maximum junction temperature (absolute maximum) | TJ | 150 | °C | 4 | |||
| Storage temperature (absolute maximum) | Tstg | -65 | 150 | °C | 4 | ||
| Junction-to-ambient thermal resistance (VQFN RGT) | RθJA | 48.2 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Junction-to-case (top) thermal resistance (VQFN RGT) | RθJC(top) | 56 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Junction-to-board thermal resistance (VQFN RGT) | RθJB | 23.4 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Junction-to-top characterization parameter (VQFN RGT) | ψJT | 1.6 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Junction-to-board characterization parameter (VQFN RGT) | ψJB | 23.4 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Junction-to-case (bottom) thermal resistance (VQFN RGT) | RθJC(bottom) | 8.2 | °C/W | RGT (VQFN, 16 pins) package | 5 | ||
| Internal gain error | -1 | 0.8 | 1 | % | TA = -40°C to +125°C | 5 | |
| Output impedance of LNA | 0.85 | 1 | 1.15 | kΩ | 5 | ||
| Quiescent operating current (LNA) | 2 | 2.7 | mA | LNA_Out = Open | 5 | ||
| Quiescent operating current (LNA), over temperature | 3 | mA | TA = -40°C to +125°C | 5 | |||
| Log conformance error | LCE | -1 | 0.6 | 1 | dB | f = 1MHz | 6 |
| Log conformance error, over temperature | LCE | -1.1 | 1.1 | dB | TA = -40°C to +125°C | 6 | |
| Log conformance error at 40MHz | LCE | -2 | 2 | dB | f = 40MHz | 6 | |
| Log conformance error at 40MHz, over temperature | LCE | -2.5 | 2.5 | dB | TA = -40°C to +125°C | 6 | |
| Dynamic range | DR | 96 | 98 | dB | LCE = ±1dB, f = 1MHz, VCC = 5V | 6 | |
| Log-Detector slope variation (Ref_Res = 56kΩ) | -6 | 1 | 6 | % | Ref_Res = 56kΩ, f = 1MHz | 6 | |
| Log-Detector slope variation (Ref_Res = 56kΩ), over temperature | -6.8 | 6.8 | % | TA = -40°C to +125°C | 6 | ||
| Log-Detector slope variation (Ref_Res open) | -4.5 | 4.5 | % | Ref_Res = open, f = 1MHz | 6 | ||
| Log-Detector slope variation (Ref_Res open), over temperature | -5.6 | 5.6 | % | TA = -40°C to +125°C | 6 | ||
| Minimum output voltage (QFN package) | 82 | 142 | 233 | mV | Log_Inp = 10nF to AGND, QFN Package | 6 | |
| Minimum output voltage (QFN package), over temperature | 301 | mV | TA = -40°C to +125°C | 6 | |||
| Quiescent current through VCC (Log Detector) | 3.6 | 4.6 | mA | Current through VCC | 7 | ||
| Quiescent current through VCC (Log Detector), over temperature | 5.9 | mA | TA = -40°C to +125°C | 7 | |||
| Log conformance error (AFE) | LCE | -1 | 1 | dB | f = 1MHz | 8 | |
| Log conformance error (AFE), over temperature | LCE | -1 | 1 | dB | TA = -40°C to +125°C | 8 | |
| Log-Detector slope variation (AFE, Ref_Res open) | -4.5 | 4.5 | % | Ref_Res = open | 8 | ||
| Log-Detector slope variation (AFE, Ref_Res = 56kΩ) | -7 | 1 | 7 | % | Ref_Res = 56kΩ | 8 | |
| Log-Detector slope variation (AFE, Ref_Res = 56kΩ), over temperature | -7.2 | 7.2 | % | Ref_Res = 56kΩ, TA = -40°C to +125°C | 8 | ||
| Minimum output voltage (AFE), over temperature | 450 | mV | TA = -40°C to +125°C | 8 | |||
| VCC quiescent current (total AFE) | 6 | 7.2 | mA | Total AFE, LNA_Out = open | 8 | ||
| VCC quiescent current (total AFE), over temperature | 8.3 | mA | TA = -40°C to +125°C | 8 |
CAD (KiCad official)
- Symbol:
LOG300RGTR - Footprint:
Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm - 3D model: VQFN-16(3x3) (KiCad packages3D, STEP)
- 3D model files:
log300rgtr-etched.step/log300rgtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);log300rgtr.step/log300rgtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (34 pp, sha256
1704327da3434139, retrieved 2026-10-17, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).