Features

• Two lane DisplayPort® 1.2a receiver
• Triple 10-bit video DAC
– 162 MSPS throughput rate
– VSIS compatible
– RGB output with 0 to 700 mV
range
• 3.3 V HSYNC, VSYNC
• Resolution through WUXGA
• EDID, MCCS pass-through support
• 3.3 V DDC output signals
• Sink detection logic
• Low power operation – Active 400
mW, standby mode 15 mW
• Package: 64-pin QFN, 6 x 6 mm

Applications

• DisplayPort to VGA dongle as an
attachment to notebook and desktop PCs
• DisplayPort to VGA conversion for
notebook and desktop PC motherboard
applications

1. Description

STDP3150 is a DisplayPort to VGA signal format converter for interfacing DisplayPort based PC,
notebook, tablet, and smart phones with conventional VGA displays. DisplayPort offers a unified,
scalable, and cost effective interface for embedded and external display applications. As desktop
and notebook PCs are increasingly transitioning from conventional analog type interfaces to
DisplayPort, STDP3150 facilitates the transition by offering seamless connectivity between new
DisplayPort PC, notebooks, and the installed base VGA monitors and projectors. Besides the
dongle application, STDP3150 is also a perfect fit for the notebook and desktop motherboard
designs based on new generation Intel, AMD CPU/GPU architecture. STDP3150 is a highly
integrated converter featuring a DisplayPort receiver, video DAC, clock form generator, test pattern
generator, and sink detection block. In addition, STDP3150 includes EDID and MCCS passthrough
features, forming a fully transparent operation between the PC and display. Active power
consumption of this device is as low as 400 mW, and thus it can be powered by the DisplayPort
source when used in a dongle application. The device has a built-in sink detection feature that
determines the active and standby state. The device enters into standby (low power) state
whenever the VGA cable is disconnected and returns to normal operation when the cable is
connected back.
STDP3150 supports video resolutions from VGA through WUXGA. The input DisplayPort interface
consists of two main lanes, AUX channel, and HPD signal that maps directly to a standard
DisplayPort connector via two layers PCB. The output interface consists of analog R, G, B video,
Hsync, Vsync, and DDC signals. Analog video signal amplitude ranges from 0 to 700 mV from a
10-bit video DAC with maximum sampling frequency of 162 MHz. The VGA output signal interface
conforms to the VSIS standards with separate Hsync and Vsync control signals. The DDC_SDA
and DDC_CLK signals are driven from an I2C master, which controls I2C traffic between the
DisplayPort AUX channel and external slave device.