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Tube❄️Time

here's a fun mystery IC die photo. this one is unusual in that it is an actual photograph that i have scanned. it seems to be made by HP. the die is marked "1DX3A"
23 June at 0:21 | Open on mastodon.social
7 comments
Tube❄️Time

it came with a companion photo, this time of a die marked "1DX4A". there's some weird stuff going on in there...
23 June at 0:22 | Open on mastodon.social
Tube❄️Time

like there are differential signals going all over the place even with some length matching. gotta be at the picosecond level.
23 June at 0:23 | Open on mastodon.social
Tube❄️Time

ahh, the HP Journal delivers! these are chips from the HP 54720/10 oscilloscope. the 1DX3 is a dual 7-bit (8-bit?) ADC and the 1DX4 is the front-end sampler and timing generator.

(vtda.org/pubs/HP_Journal/HP_Jo pg 74).

(H/T SiliconInsider)

The performance of the probe fixture has been demonstrated by performing automatic wafer testing of the HP 54720/10 sampler 1C (1DX4) in a typical manufacturing test environment. A similar probe fixture has been designed but not yet demonstrated for the other important HP 54720/10 data acquisition IC, the 1DX3 dual 7-bit ADC. Since the 1DX4 (along with two 1DX3s) is mounted in a costly hybrid assembly, at-speed wafer testing of this circuit is greatly desired. Results of the 1DX4 wafer test demonstration show that the probe fixture allows automated at-speed testing of a high performance data acquisition circuit by providing convenient and low-loss interfacing of signals up to the circuit's full operating speed. The 1DX4 is a fully custom, mixed-signal, 128-pad, 2-Hz bandwidth bipolar integrated circuit. The 1DX4 is the frontend data sampler and the clock and timing generator of the high-speed data acquisition system incorporated in the HP 54720/10 oscilloscope. The HP 54720/10 data acquisition system is described in more detail in the article on page 11 and in reference 2.
24 June at 4:26 | Open on mastodon.social
Darryl Ramm

@tubetime

HP Journal now would have articles about how great their marketing weenies are for trapping clueless customers in their subscription printing scams.

Oh I wish Keysight had managed to keep the Hewlett-Packard name.

24 June at 4:47 | Open on hachyderm.io
F4GRX Sébastien
Tube❄️Time

@f4grx I don't know, the journal article didn't mention if they're SoS.

24 June at 15:20 | Open on mastodon.social
Poul-Henning Kamp

@tubetime

Could look like one of the custom chips a high performance pattern generator ?

23 June at 6:57 | Open on fosstodon.org
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