155-0078-00: Difference between revisions

Latest revision as of 03:28, 8 June 2024

The Tektronix M084 (P/N 155-0078-xx,155-0273-00,155-0274-00) is a broadband amplifier monolithic integrated circuit in a minipac package. The input and output are differential. The 155-0078 and its test fixture were designed by John Addis for the 485 scope ^{(Note 1)}, which uses no less than 18 of these chips in various grades.

The last two digits of the part number, the grade, correspond to a combination of DC and HF performance. Each M84 was tested for DC performance and HF performance. DC performance was tested using a custom fixture described below. HF performance was tested using the 25ps Push-Pull Pulse Generator.

The last two digits of the 155-0078-xx part number are determined by a selection process after manufacture:
Suffix	Speed	DC Charact.	Replaceable by
00	Fast	Best	----
01	Fast	Third best	-03,-00
02	Fast	Most relaxed	-01,-03,-00
03	Fast	Second best	-00
04	Slow	Same as -00	-00
05	Slow	Same as -01	-03,-00,-07,-04
06	Slow	Same as -02	-01,-03,-00,-05,-07,-04
07	Slow	Same as -03	-00,-04
10	Fast	Best	----
11	Fast	Third best	-13,-10
12	Fast	Most relaxed	-11,-13,-10
13	Fast	Second best	-10
Sometimes an instrument will contain a better grade of part than called for in the manual. The manual should be consulted for the correct replacement type.

The M84 also comes in 14-pin DIP, as 155-0273-00 and 155-0274-00 (slower grade).

Regarding the various grades of M84, John Addis says:

There are several DC specs which differ with part suffix.
Suffixes -10, -11, -12 and -13 were used for the redesigned M84, known as the M705. The M705 was necessary because the original SH2 (2-2.5 GHz?) process was being discontinued. The M705 was designed by Hal Lillywhite using the faster SH3 process (6-7 GHz). Additionally, the M705 apparently had the gain setting resistor laser trimmed at the wafer level. The M705 was designed in late 1989 and tested in early 1990.
There was one high frequency test fixture and perhaps two dc test fixtures. Every M84 was subjected to all tests. All tests were done manually. I designed both test fixtures and the 25ps PPPG.
Transient Response (schematic not shown) uses the 25ps Push Pull Pulse Generator (PPPG) and a sampling scope. Sampler load supplies dc current (through X2 pads and sampler input resistance. The sampling scope chassis is floating at (probably) +5V through 8.2 ohms. 25ps PPPG has transformer coupled trigger output to sampling scope trigger input.
DC test fixture:
I have attached a schematic of a dc test fixture for manufacturing. It looks like this fixture only tests for V_hump. There may have been another test fixture for the other dc tests. Those tests may have been done on a system. The V_hump test may have been so difficult to perform on an automated system that it needed this extra fixture.
V_hump is the amount of maximum dc imbalance, probably referred to the input, which occurs when the variable gain function is swept from full invert to full normal. The two ends of the curve are set to the same dc output level using the balance control attached to pin 1. Ideally, there is no change in dc level under these conditions, but various imbalances in the M84 output devices result in a hump for inverted gain and a hump for the normal gain. Only the -00, -04 and -10 suffixed parts were required to pass this stringent V_hump test. The fixture was in a rubber footed metal chassis about 4” high 5” deep, and 7” wide.

Test criteria defining the various grades of M84:
Displayed Risetime <355 ps	-00 and -10	-01 and -11	-02 and -12	-03 and -13
Displayed Risetime 355-410 ps	-04	-05	-06	-07
Normal Offset (RTO)	<14 mV	<14 mV	<28 mV	<14 mV
Invert Offset (RTO)	<14 mV	<14 mV	<28 mV	<14 mV
HFE of Q1 and Q2	70-250	70-250	50-400	70-250
Normal Gain	2.68-2.96	2.68-2.96	2.68-2.96	2.68-2.96
Invert Gain	2.68-2.96	2.68-2.96	2.68-2.96	2.68-2.96
Null Offset (Gain = 0)	10 mV	no spec	no spec	<30 mV
Null Gain (Test of Q3 and Q4)	14 mV	no spec	no spec	<14 mV
50% Gain	0.49-0.51	no spec	no spec	0.49-0.51
Off Feedthrough	<0.2 mV	<0.2 mV	<0.2 mV	<0.2 mV
Normal Hump Voltage	<2.5 mV	no spec	no spec	no spec
Invert Hump Voltage	<2.5 mV	no spec	no spec	no spec

Tektronix M84 155-0078-00 Description (PDF)

Pictures

Excerpt from 067-0587-01 schematic, showing application of 155-0078-00.
155-0078-01 amplifiers in 7A26. Note symmetric layout.
M84 Hump Voltage Test Fixture schematic
155-0078-10
155-0078-10

Used in

464, 465, 466, 468
475 (U140, U240, U450), 475A, 475M
485
2220, 2221, 2230 (155-0274-00: A1U130, A1U180; 155-0273-00: A2U30, A2U80)
7834, 7844 (U415,U515)
7854 (A13U520,A13U590,A13U620,A13U680)
7904, R7903 (U5510,U5530,U5550,U5610,U5630,U5650)
R7912, 7912AD, 7912HB
7104
7A16A (U350, U450, U550, U750), 7A16P (U60240, U60340, U60440, U60540)
7A24, 7A26 (U1350,U1450,U1550,U1750,U2350,U2450,U2550,U2750)
7A26
7A42 (A5U1010,A5U1020,A5U1040,A5U1060)
067-0587-01, 067-0680-00
AM503
PG502 (U360, -06)
PG508 (U850)
DC510 (A12U1311, A12U1331, -10), DC5010
FG5010

Some instruments using part 155-0078-00

Instrument	Manufacturer	Class	Model	Description	Introduced
067-0587-01	Tektronix	Plug-in	067-0587-01	7000 Series Calibration Fixture	(?)
067-0680-00	Tektronix	Plug-in	067-0680-00	5400 Series Mainframe Calibrator	(?)
464	Tektronix	Oscilloscope	464	Portable 100 MHz dual-trace storage scope	1975
465	Tektronix	Oscilloscope	465	Portable 100 MHz dual-trace scope	1972
466	Tektronix	Oscilloscope	466	Portable 100 MHz dual-trace storage scope	1974
468	Tektronix	Oscilloscope	468	10/100 MHz Digital Storage Scope	1980
475	Tektronix	Oscilloscope	475	Portable 200 MHz dual-trace scope	1972
475A	Tektronix	Oscilloscope	475A	Portable 250 MHz dual-trace scope	1977
485	Tektronix	Oscilloscope	485	350 MHz portable scope	1972
7104	Tektronix	Oscilloscope	7104	1 GHz mainframe with MCP CRT	1978
7834	Tektronix	Oscilloscope	7834	400 MHz storage mainframe	1977
7844	Tektronix	Oscilloscope	7844	400 MHz dual-beam non-storage mainframe	1974
7854	Tektronix	Oscilloscope	7854	400 MHz waveform-processing scope	1980
7904	Tektronix	Oscilloscope	7904	500 MHz non-storage mainframe	1971
7912AD	Tektronix	Oscilloscope	7912AD	500 MHz digitizer	1978
7912HB	Tektronix	Oscilloscope	7912HB	750 MHz digitizer	1988
7A16A	Tektronix	Plug-in	7A16A	225 MHz vertical amplifier	1973
7A16P	Tektronix	Plug-in	7A16P	150/200 MHz vertical amplifier	1978
7A24	Tektronix	Plug-in	7A24	400 MHz dual channel vertical amplifier	1974
7A26	Tektronix	Plug-in	7A26	200 MHz dual-channel amplifier	1974
7A42	Tektronix	Plug-in	7A42	350 MHz four-channel logic triggered amplifier	1984
AM503	Tektronix	Plug-in	AM503	current probe amplifier	1976
DC5010	Tektronix	Plug-in	DC5010	350 MHz programmable frequency counter	1982
DC510	Tektronix	Plug-in	DC510	350 MHz frequency counter	1982
FG5010	Tektronix	Plug-in	FG5010	20 MHz function generator	1982
PG502	Tektronix	Plug-in	PG502	250 MHz pulse generator	1974
PG508	Tektronix	Plug-in	PG508	50 MHz pulse generator	1976
R7903	Tektronix	Oscilloscope	R7903	500 MHz non-storage mainframe	1974
R7912	Tektronix	Oscilloscope	R7912	500 MHz digitizer	1973

Notes

Note 1: See John Addis quote in 7A11 article

Datasheet

Tektronix 155-0078-10 Datasheet (PDF)

@@ Line 2: / Line 2: @@
 |Manufacturer=Tektronix
 |Model=M084
-|Part_nos=155-0078-xx
+|Part_nos=155-0078-xx,155-0273-00,155-0274-00
-|Description=Broadband vertical amplifier IC
+|Description=broadband amplifier
-|Used_in=
+|Used_in=464;465;466;468;475;475A;475M;485;7834;7844;7854;7904;R7903;R7912;7912AD;7912HB;7104;7A16A;7A16P;7A24;7A26;7A42;067-0587-01;067-0680-00;AM503;PG502;PG508;DC510;DC5010;FG5010
 |Designers=John Addis;
-}} broadband vertical amplifier integrated circuit in a [[minipac]] package.
+}} in a [[minipac]] package.
 The input and output are differential.
 The 155-0078 and its test fixture were designed by [[John Addis]] for the [[485]] scope <sup>(Note 1)</sup>, which uses no less than 18 of these chips in various grades.
@@ Line 54: / Line 54: @@
 Suffixes -10, -11, -12 and -13 were used for the redesigned M84, known as the [[M705]].
-The M705 was necessary because the original [[SH2]] (2-2.5GHz?) process was being discontinued.
+The M705 was necessary because the original [[SH2]] (2-2.5 GHz?) process was being discontinued.
-The M705 was designed by [[Hal Lilliwhite]] using the faster [[SH3]] process (6-7GHz).
+The M705 was designed by [[Hal Lillywhite]] using the faster [[SH3]] process (6-7 GHz).
 Additionally, the M705 apparently had the gain setting resistor laser trimmed at the wafer level.
 The M705 was designed in late 1989 and tested in early 1990.
@@ Line 115: / Line 115: @@
 * [[Media:Tek m84.pdf|Tektronix M84 155-0078-00 Description (PDF)]]
+==See also==
+* [[234-0203-20]]: [[SH3]] version
+{{PatentLinks|155-0078-00}}
 ==Pictures==
@@ Line 126: / Line 130: @@
 ==Used in==
-* [[475]] (U140, U240, U450)
+* [[464]], [[465]], [[466]], [[468]]
+* [[475]] (U140, U240, U450), [[475A]], [[475M]]
 * [[485]]
 * [[2220]], [[2221]], [[2230]] (155-0274-00: A1U130, A1U180; 155-0273-00: A2U30, A2U80)
 * [[7834]], [[7844]] (U415,U515)
 * [[7854]] (A13U520,A13U590,A13U620,A13U680)
-* [[7904]], [[7903]] (U5510,U5530,U5550,U5610,U5630,U5650)
+* [[7904]], [[R7903]] (U5510,U5530,U5550,U5610,U5630,U5650)
-* [[7912AD]], [[7912HB]]
+* [[R7912]], [[7912AD]], [[7912HB]]
-* [[7A16A]] (U350, U450, U550, U750)
+* [[7104]]
-* [[7A16P]] (U60240, U60340, U60440, U60540)
+* [[7A16A]] (U350, U450, U550, U750), [[7A16P]] (U60240, U60340, U60440, U60540)
 * [[7A24]], [[7A26]] (U1350,U1450,U1550,U1750,U2350,U2450,U2550,U2750)
+* [[7A26]]
 * [[7A42]] (A5U1010,A5U1020,A5U1040,A5U1060)
-* [[067-0587-01]]
+* [[067-0587-01]], [[067-0680-00]]
 * [[AM503]]
 * [[PG502]] (U360, -06)
 * [[PG508]] (U850)
-* [[DC510]] (A12U1311, A12U1331, -10)
+* [[DC510]] (A12U1311, A12U1331, -10), [[DC5010]]
+* [[FG5010]]
+{{Part usage}}
 ==Notes==