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50V 100mA quad analogue switch is unusually capable

50V 100mA quad analogue switch is unusually capable

Posted Date: 2023-08-19
50V 100mA quad analogue switch is unusually capable

Referred to as TMUX7612 and made on a CMOS course of, it should run on single rails between 4.5 and 50V, twin rails from ±4.5 to ±25V, and uneven rails – the corporate gave 37.5Vdd and -12.5Vss for example, aimed toward LCD manufacturing testing.

And on the identical time, a beyond-the-rails 5V analogue change – scroll down

Channels are rail-to-rail, absolutely bi-directional and on-resistance is usually 1.35Ω (+12V single-supply, 3 to 7.8V 10mA sign, 25°C). Max 25°C worth is 1.65Ω (2.15Ω over -40 to +85°C, 2.45Ω over the IC’s full -40°C to +125°C).

Near the rails, on-resistance climbs: solely just a little in the direction of Vss, however with a big step (~10Ω) very near Vdd. “For the perfect linear efficiency, the sign vary ought to be held inside a 3V headroom beneath the constructive and above the destructive provides,” stated TI.

Present dealing with is excessive: between 65 and 470mA relying on temperature, what number of channels are in use and package deal kind – this seems to be legitimate with the sign wherever inside the energy rails, besides inside 2.5V of Vdd.

25°C channel to channel matching is usually 0.1Ω, and on-resistance flatness is a powerful 0.01Ω – each of those numbers are with a 12V provide and with a 10mA sign between 3 and seven.8V. Off leakage is sub-nA besides above +85°C.

Every change has its personal logic enter, that are described as ‘1.8V appropriate’ within the advance data model information sheet accessible on the time of writing. This appears to be with respect to the IC’s ‘GND’ pad. As much as +44V could be utilized to the logic inputs, relying on voltage rails. A pull down on every biases the switches ‘off’ with no connection.

Activate and off and within the low μs, and there's a minimal break-before-make of 125ns in any respect temperatures.

On-capacitance to floor is usually 37pF, or 43pF to floor from the change ends when off. Cost injection is just 4pC.

Bundle selection is 4 x 4mm WQFN or 5 x 6mm TSSOP. For greatest efficiency, the uncovered thermal pad ought to be tied to Vss.

Concerning the LCD testing utility, TI stated: “New technology LCD take a look at gear usually requires simultaneous high-precision, high-voltage, multi-channel measurement capabilities and minimal channel-to-channel variation throughout measurement,” and defined {that a} 4-channel single-pole change can be utilized in suggestions and sign paths when measuring LCD driver present and voltage traits – an LCD tester circuit ins included within the information sheet.

The TMUX7612 advance data information sheet is effectively price a glance as TI has gone the additional mile with detailed recommendation on decoupling (keep away from vias) and PCB structure (spherical monitor corners) amongst different morsels. It doesn't embody logic enter specs on the time of writing. The product web page is right here.

Diagram be aware: the GND pad is lacking.

On the identical time TI launched TMUX2889, a double pole double throw analogue change that handles ±5.5V indicators regardless of operating from single-rail 1.8 to five.5V, and it will possibly fortunately sit with ±5.5V on its sign inputs when powered down as effectively. The logic inputs can be asserted when no energy is utilized with out harm.

On resistance is just a few hundred mΩ, and with 1mΩ on-resistance flatness, and 0.001% THD+N, it's designed for passing audio and precision analogue indicators. As it will possibly change lots of of mA – over 1A in sure circumstances – it may be used to modify audio outputs between audio system and headphones, for instance. Computerized over-temperature safety opens the change if over-heating happens.

3dB bandwidth is 72MHz, broadening functions effectively past audio.

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