This document introduces the ADV7185 professional NTSC/PAL video decoder from Analog Devices. The decoder features 12-bit ADC, dual video clocking schemes, real-time clock and status information output, etc.
The ADV7185 is an analog video to digital YCrCb decoder supporting NTSC and PAL standards, with dual 12‑bit ADCs, programmable input formats, and a 27 MHz crystal‑locked clock. It provides 10‑bit CCIR656 output and includes integrated AGC, clamping, and scaling functions for professional video applications such as projectors, digital TVs, and set‑top boxes.
The document lists detailed electrical specifications, timing diagrams, pin configurations, absolute maximum ratings, and mechanical dimensions. It also includes application notes, performance charts, and ordering information for the 80‑lead LQFP package.
| Resolution (each ADC) | 12 Bits |
|---|---|
| Analog Input Voltage Range | 0.5 V to 2.0 V p‑p |
| Digital Power Supply (Vpp) | 3.2 V – 3.5 V |
| Analog Power Supply (Va) | 4.75 V – 5.25 V |
| SNR (Ramp) | 61 – 63 dB |
| Horizontal Lock Time | 50 Lines |
| Package | 80‑Lead LQFP |
The analog video inputs accept a 0.5 V to 2.0 V peak‑to‑peak signal.
The device achieves an SNR of 61 – 63 dB in ramp tests.
It is supplied in an 80‑lead thin‑plastic quad flat‑pack (LQFP).