Can i use this to convert a 720p hdmi to 1080i sdi?

Yes you can. Mini Converter UpDownCross HD has the ability to convert any SD or HD video format with up, down, or cross conversion via SDI and HDMI. See page 83 on Blackmagic Converters Manual. https://www.blackmagicdesign.com/manuals/Converters/Blackmagic_Converters_Manual.pdf

The output matches the monitor; which monitor? i will input a laptop hdmi out to 2 different switchers; 1 via hdmi 1 via sdi.

"Output supports EDID of the monitor". https://en.wikipedia.org/wiki/Extended_Display_Identification_Data This simply means that the converter does not output a fixed format via HDMI, rather it will communicate with the connected display to handshake on what resolution the monitor prefers. If your outputs are going direct to switchers and not to a display/TV, then this should not affect you and converter will simply output what you set it up to do.

Will this converter let me use my iphone camera or apple tablet camera into atem mini switcher?

Im not sure because the mini switcher allows you to switch video outputs during streaming. The UpDownCross use one signal and let you distribute that signal through the sdi out and hdmi out..

Does this device come with a power supply?

the one i ordered through here did

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Blackmagic Design Mini Converter UpDownCross HD

Blackmagic Design Mini Converter UpDownCross HD

Product ID: 70737398

Details

Brand
Blackmagic
Maximum Supply Voltage
36
Minimum Supply Voltage
6 volts
Mounting Type
Handmontage
Number of Pins
34

⚡Low 5W power consumption, wide 6-36V range

🔄Universal SD/HD video format conversion

🔌Dual SDI & HDMI I/O with reference sync

€ 378.88

Duties & taxes included

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎥 Convert like a pro, stream like a boss.

PLUG PLAY SIMPLICITY - Instant setup with dip switch controls and on-device format guide — get live-ready in minutes.
COMPACT POWER EFFICIENCY - Runs on a universal 12V supply with ultra-low 5W consumption — perfect for on-the-go pros.
PRO GRADE SIGNAL INTEGRITY - Built-in Teranex algorithms ensure crystal-clear up/down/cross conversions with zero compromise.
SEAMLESS FORMAT FLEXIBILITY - Effortlessly convert any SD or HD video format to match your workflow — no compatibility headaches.
CROSS PLATFORM COMPATIBILITY - Works flawlessly across Mac and Windows OS, integrating smoothly into any professional setup.

The Blackmagic Design Mini Converter UpDownCross HD is a compact, professional-grade video converter that effortlessly converts any SD or HD video format via SDI and HDMI inputs/outputs. Featuring high-quality Teranex conversion algorithms, universal power supply compatibility, and easy dip switch configuration, it’s designed for fast, reliable integration into live production workflows. Compatible with Mac and Windows, it supports resolutions from 640x480 up to 1080p60, making it an essential tool for video professionals needing seamless format conversion on demand.

Specifications

ASIN	B07C2QMH6W
Best Sellers Rank	#38 in Digital-Analog Converters #112 in Video Converters
Brand	Blackmagic Design
Brand Name	Blackmagic Design
Compatible Devices	Monitor
Customer Reviews	4.7 out of 5 stars 356 Reviews
Global Trade Identification Number	09338716005417
Interface	HDMI
Interface Type	HDMI
Item Highlight	Converts and up/down/cross-converts SD and HD SDI formats with built-in format standards conversion (CONVMUDCSTD/HD)
Item Weight	247 g
Manufacturer	Blackmagic Design
Material Type	Stainless Steel
Maximum Supply Voltage	36 volts_of_direct_current
Minimum Supply Voltage	6 volts
Model	BM-CONVMUDCSTD/HD
Mounting Type	Handmontage
Number of Channels	16
Number of Items	1
Number of Pins	34
Part Number	BM-CONVMUDCSTD/HD
UPC	818206535185
Unit Count	1 Count
Warranty Description	2-Year Warranty

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