VGA to HDMI adapters (also called converters) are active devices that convert an analog VGA video signal (from older computers, laptops, or other sources) into a digital HDMI signal for modern monitors, TVs, projectors, or displays.
They are one-way only (VGA source → HDMI display) and require active electronics because VGA is analog RGB + separate H/V sync, while HDMI is digital TMDS with embedded audio and EDID/handshake support. Passive cables do not work for this conversion.
These compact, portable adapters (or short cable-style units) let you connect legacy VGA-equipped devices to HDMI-only screens without upgrading the source hardware. Most include a way to carry stereo audio (via 3.5 mm jack or USB audio) and embed it into the HDMI output. They are commonly used for presentations, extending desktop displays, connecting older PCs to HDTVs, digital signage, or retro setups.
Typical form factors:
An HDMI cable (sold separately in many cases) connects the adapter to the display.
Limitations:
| Specification | Typical Values | Notes |
|---|---|---|
| Max Resolution | 1920×1080 (1080p) @ 60 Hz | Many also support 1920×1200, 1600×1200, 1680×1050, etc. Some basic models top out lower. |
| Supported Resolutions | 640×480, 800×600, 1024×768, 1280×720/768/800/1024, 1360/1366×768, 1440×900, 1600×1200, 1680×1050, 1920×1080, and others | Depends on source graphics card and display EDID. |
| Refresh Rate | Usually 60 Hz (some support 50/75 Hz at lower res) | |
| Color Depth | 8-bit per channel (24-bit total / True Color) | Some list 16-bit. |
| Video Bandwidth | ~1.65 Gbps per channel (up to ~6.75 Gbps total) | Sufficient for 1080p. |
| Audio | Stereo (3.5 mm analog or USB); L-PCM 2ch 48 kHz/16-bit on HDMI | USB audio often Windows-optimized. |
| Connectors | Input: VGA (HD-15 male or female) + 3.5 mm or USB Output: HDMI Type A female | USB for power and/or audio. |
| Power | 5 V via USB (typical draw 100–650 mA; max ~1 A on some) | External adapter optional on many. |
| Chipsets (examples) | MS9282, Silicon Image Sil8784 + audio codec, others | Active conversion chips. |
| Dimensions / Weight | ~50–80 mm length; 15–60 g for dongles | Varies widely. |
| Operating Temp | 0–40/60 °C typical | |
| Compatibility | Most PCs/laptops with VGA; HDMI displays/TVs/projectors | Works with Windows, Linux, etc.; audio may vary by OS. |
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