component
AD8331ARQZ-R7
Public Made by Adomby adom
Analog Devices Low Noise Amplifiers (LNA) - RF, QSOP-20-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownAD8331ARQZ-R7
Analog Devices · Low Noise Amplifiers (LNA) - RF · QSOP-20-150mil
AD8331ARQZ-R7 from Analog Devices, in a QSOP-20-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | LMD | passive | LNA bias bypass pin; connect 18-22 nF capacitor to ground for mid-supply high-frequency bypassing |
| 2 | INH | input | LNA single-ended input, AC-coupled; accepts ±275 mV input signal range |
| 3 | VPSL | power_in | LNA 5 V power supply; bypass with 0.1 µF capacitor to COML |
| 4 | LON | output | LNA inverting output, 19 dB differential gain, 5 Ω impedance; drive RIZ feedback resistor for input impedance matching |
| 5 | LOP | output | LNA non-inverting output, 19 dB differential gain, 5 Ω impedance; AC-couple through 0.1 µF capacitor to VIP |
| 6 | COML | power_in | LNA ground; connect to PCB ground plane and LMD bypass capacitor |
| 7 | VIP | input | VGA non-inverting input, 100 Ω differential impedance; AC-coupled from LOP through 0.1 µF capacitor |
| 8 | VIN | power_in | VGA inverting input, 100 Ω differential impedance; AC-coupled from LON through 0.1 µF capacitor |
| 9 | MODE | input | Gain slope select logic input; low selects ascending mode (50 dB/V), high selects descending mode (−50 dB/V) where available |
| 10 | GAIN | input | Gain control voltage input, 40 mV to 1.0 V range; 50 dB/V scale provides ±48 dB total gain adjustment; 10 MΩ input impedance |
| 11 | VCM | input | VGA common-mode voltage reference; default 2.5 V, externally adjustable 1.5 V to 3.5 V; bypass with 0.1 µF and 1 nF capacitors in parallel |
| 12 | RCLMP | passive | Output clamp level resistor connection; connect resistor to ground to program output voltage clamp threshold, 0.5 V to 4.4 V p-p range |
| 13 | HILO | input | Gain range select logic input; low selects LO mode (−4.5 to 43.5 dB), high selects HI mode (7.5 to 55.5 dB) |
| 14 | VPOS | power_in | VGA 5 V power supply; bypass with 0.1 µF capacitor to COMM; separate supply rail from LNA VPSL |
| 15 | VOH | output | VGA non-inverting differential output, 1 Ω impedance; 2.5 V common mode ±1.125 V swing capability |
| 16 | VOL | output | VGA inverting differential output, 1 Ω impedance; 2.5 V common mode ±1.125 V swing capability |
| 17 | COMM | power_in | VGA ground; connect to PCB ground plane for output and supply return current |
| 18 | ENBV | input | VGA enable logic input; high enables VGA, low disables for reduced quiescent current; 40 kΩ input impedance |
| 19 | ENBL | input | LNA enable logic input; high enables LNA, low disables for reduced quiescent current; 25 kΩ input impedance |
| 20 | COMM | power_in | VGA ground; secondary ground connection for output return path current distribution |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | QSOP-20-150mil |
| Category | RF And Wireless |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
AD8331ARQZ-R7 - Footprint:
Package_SO:QSOP-20_3.9x8.7mm_P0.635mm - 3D model: QSOP-20-150mil (KiCad packages3D, STEP)
- 3D model files:
ad8331arqz-r7-etched.step/ad8331arqz-r7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad8331arqz-r7.step/ad8331arqz-r7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (56 pp, sha256
59fd153ca71b5bca, retrieved 2026-09-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).