The world’s highest performing
probe system keeps getting better
Data Sheet
02 | Keysight | InniiMax III/III+ Probing System – Data Sheet
Unmatched performance
– Full 30 GHz bandwidth to the probe tip– InniiMode probing for making dif ferential, single-ended and common mode
measurements with a single probe (with InniiMax III+)
– Industry’s highest delity and accuracy due to bandwidth and extremely low loading – Probe ampliers loaded with measured s-parameters for more accurate response
correction
– Bandwidth upgradable (InniiMax III only)– Variety of probe heads for different use models with maximum usability
Industry-leading probe performance
The InniiMax III probing system of fers you the highest performance available for
measuring differential and single-ended signals, with exible connectivity solutions for
today’s high-density ICs and circuit boards. Four different InniiMax III probe ampliers
ranging from 16 GHz to 30 GHz are available for matching your probing solution to your
performance and budget requirements. A proprietary 200 GHz f T InP (indium phosphide)
IC process with backside ground vias and novel thick lm technology is utilized to
accommodate your highest performance needs and is unmatched by any product in
the market.
InniiMax III probe amplier
The N2830A /N7000A Series InniiMax III+ probing system is the next generation of
InniiMax probing, greatly expanding the measurement capabilities and usability of a
probe capable of measuring all components of a differential signal. The built-in InniiMode
technology allows you to switch to differential, single-ended, and common mode without
adjusting probe tip connections. The InniiMax III+ probe’s InniiMode provides the
following modes of operation.
– A - B (differential)– A - ground (single-ended A)– B - ground (single-ended B)– (A+B)/2 - ground (common mode)
–
The InniiMax III+ works with the full array of InniiMax III probe heads and supports
the full bandwidth of the InniiMax III+.
InniiMax III+ probe amplier (N2830A Series)
InniiMax III+ probe amplier (N7000A Series)
03 | Keysight | InniiMax III/III+ Probing System – Data Sheet
Correction
Frequency Hz
4E10
12
Highest delity and accuracy
The InniiMax III provides the highest bandwidth and incredibly
low loading to allow for a new level of signal delity and accuracy.
Continuing the probe head topology pioneered by Keysight
Technologies, Inc. in the InniiMax I and II probe systems, ve
probe heads are provided to accommodate multiple use models:
a 30 GHz browser that is extremely usable, a 25/28 GHz ZIF probe
head with economical replaceable/removable ZIF tips, a 28 GHz
2.92 mm probe head which allows cabled measurements using
2.92 mm, 3.5 mm, or SMA coax cables, an economical 16/26 GHz
solder-in probe head for demanding measurements, and a 16 GHz
QuickTip for a quick and secure connection.
More accurate probe correction
Each individual InniiMax III and III+ probe amp contains its
unique S-parameters, and this frequency response data is used
with the S-parameters of the various probe heads to further
atten the probe’s magnitude and phase response for accuracy.
Traditionally, probe correction uses a nominal model based on a
typical probe amplier instead of the specic amplier. Generally,
the biggest variation between probing systems is a result of the
probe amplier. The ability to correct a specic probe amplier’s
response results in a more accurate probe correction, which
yields a more accurate measurement.
Uncompromised Usability
Extensive line-up of probe heads and accessories
Keysight’s InniiMax III/III+ probes support a wide variety of
high-speed applications with an ex tensive line-up of probe heads
and accessories.
9
6
3
0
-3
-6
No Correction
-9
-12
-15
-18
1E8
1E9
1E10
– The N5445A browser head (30 GHz) is the best choice for
quick general-purpose troubleshooting of differential signals
with its z-axis compliance and variable spacing from 20 mil
– 125 mil (or 0.5 mm – 3.1 mm). The span between the signal
tips is easily adjusted with a thumb wheel on the browser.
Integrated LED lighting at the tip illuminates the probing area
for better visibility. Order N5476A for replacement browser
tips (set of 4).
04 | Keysight | InniiMax III/III+ Probing System – Data Sheet
– The N2848A /49A QuickTip offers the industry’s rst
magnetically-engaged probe head and tip for a quick and
secure connection, pushing the usability to the next level.
The N2848A QuickTip probe head quickly snaps to the
N2849A probe tip, utilizing magnets to connect to the two
sides of the differential signal and ground. Multiple N2849A
probe tips can be installed on a DUT, allowing quick and
reliable measurement of many probe points. The QuickTip
supports the InniiMode probing when used with the
InniiMax III+ probe amp and supports differential probing
with the InniiMax III probe amp. The N2849A QuickTip tips
can also be used with the InniiMax I/II probe amps when
used in conjunction with the N2851A QuickTip probe head
for InniiMax I/II.
– The N5439A ZIF probe head provides 28 GHz bandwidth in
an economical replaceable tip form factor. For differential
measurement, the N5439A ZIF probe head with the N5440A
or N5447A ceramic ZIF tip provides the industry’s lowest
signal loading. The ZIF tips can be left on the DUT as the
probe head is moved from one probing site to the next. Order
N5440A (450 Ω ceramic), N5447A (200 Ω ceramic) or the new
N2838A (450 Ω PC board) for a set of 5 ZIF tips with plastic
sporks to aid in soldering the tips to your DUT. The N2838A
PC board ZIF tip increased the robustness of the ZIF tip
signicantly while maintaining the bandwidth performance
up to 25 GHz when used in conjunction with the N2803A and
N5439A. Variable spacing from 5 mil – 80 mil (or 0.127 mm
– 2 mm). (The N5447A 200 Ω ZIF tip is not compatible with
InniiMax III+ probes.)
– The N5444A 2.92 mm/3.5 mm/SMA probe head (28 GHz)
allows you to connect two 2.92 mm, 3.5 mm or SMA cables
to make a differential measurement on a single oscilloscope
channel. Order N5448A 2.92 mm head ex cables (10” or
25 cm) to extend the cable length and add convenience.
– The N5441A solder-in probe head is an economical,
semi-permanent connection that provides up to 16 GHz
of bandwidth. Variable span of the leads ranges from
5 mil – 80 mil (or 0.127 mm – 2 mm).
05 | Keysight | InniiMax III/III+ Probing System – Data Sheet
– The N2836A solder-in head provides up to 26 GHz bandwidth
when used in conjunction with the N2803A probe amplier.
This probe head supports InniiMode probing when used with
the InniiMax III+ probe amp.
– The N5442A Precision BNC 50 Ω adapter allows you to
use your existing InniiMax I (1130A-1134A), InniiMax II
(1168A/69A), N2750A-52A, N2795A-97A active probes or a
general purpose 50 Ω BNC cable with the 90000 X- or 90000
Q-Series oscilloscope.
– The N5449A high impedance adapter allows connection for
probes that require a high impedance scope input such as
a high impedance passive probe, 1147B current probe, or
N2790A differential probe to the Inniium 90000-X/Q Series
oscilloscopes. The N5449A provides switchable AC/DC
coupling as well as 10:1 and 1:1 attenuation settings. The
adapter comes with a N2873A 500 MHz 10:1 passive probe.
– The N5477A sampling oscilloscope adapter makes the
InniiMax III probing system fully compatible with the
Inniium 86100C DCA-J sampling oscilloscope. Previously
the DCA-J was limited to 13 GHz of probing, but with the
N5477A, the DCA-J now has 30 GHz of probing, increasing
its performance and exibility. To use the InniiMax III+ probe
on sampling oscilloscopes, order the N1022B probe adapter
and the 1143A probe offset control and power module.
– The N5443A performance verication and deskew xture
is required to calibrate and verify the performance of the
InniiMax III probe. Keysight is currently the only oscilloscope
vendor in the market that provides the hardware for customers
to validate their high performance probing system. Order
E2655C to calibrate and verify the performance of the
InniiMax III+ probes.
Bandwidth upgradability (for InniiMax III)
As frequencies have continued to increase, so have the cost of
probes. The InniiMax III system offers the world’s rst fully
upgradable probe amplier. Purchase a 16 GHz probe amplier
today, knowing that in the future, you can upgrade the amplier
to higher bandwidths (20/25/30 GHz) at a fraction of the cost of
a new probe amplier.
06 | Keysight | InniiMax III/III+ Probing System – Data Sheet
InniiMax III/III+ Probing System Family Diagram
07 | Keysight | InniiMax III/III+ Probing System – Data Sheet
Performance Specications and Characteristics
InniiMax III/III+ warranted specications
Probe headProbe ampBandwidthDC input
N5440A_N5439A ceramic 450 Ω ZIF tip and
ZIF probe head
N2836A 450 Ω solder-in probe head vertical
orientation with no ground wires
Differential mode N7003A
20 GHz probe amp
20 GHzRdiff=100 kΩ ± 2%, Rse=50 kΩ ± 2%
InniiMax III/III+ probe head characteristics
These characteristics are mainly determined by the probe head. Performance
numbers listed are: -3 dB bandwidth/10-90% transition time/20-80% transition time.
Performance listed is with the highest bandwidth probe amp models in each family.
Performance with lower bandwidth amps is the lower of the: AmpBW, (.434/AmpBW),
(.308/AmpBW), or bandwidth measured with the highest
bandwidth amp in the family.
4 mVrms with
28 GHz probe head
and 30 GHZ probe
amp
18 Vpeak Cat 118 Vpeak Cat 18 Vpeak without violating
Rse=50 kΩ ± 2%
each input to ground,
Rdiff=100 kΩ ± 2%
and Rcm=25 k Ω ± 2%
Rse=500 Ω each
input to ground,
Rdiff=1 kΩ and
Rcm=250 Ω
0.8 Vpp, ± 0.4 V
(HD2&3 < -34 dbc),
1.6 Vpp, ± 0.8 V
(HD2&3 < -38 dbc)
± 6 VDC to 250 Hz,
± 0.65 V > 250 Hz
2 mVrms with
28 GHz probe head
and 30 GHz probe
amp
55 Ω to VtermRse=50 kΩ ± 2%
50 Ω to .901*VtermRse=500 Ω each
1.6 Vpp, ± 0.8 V
(HD2&3 < –34 dbc),
2.5 Vpp, ± 1.25 V
(HD2&3 < –38 dbc)
{[rms(vin-vterm)]^2/55]}
for each input
± 6 VDC to 250 Hz,
± 1.25 V > 250 Hz
without violating max
input power
max input power
4 mVrms4.5 mVrms in diff mode
max input power
450 Ω probe headsN5444A 2.92 mm, SMA,
3.5 mm probe head
55 Ω to Vterm
each input to ground,
Rdiff=100 kΩ ± 2% and
Rcm=25 kΩ ± 2%
50 Ω to .901*Vterm
input to ground,
Rdiff=1 kΩ and
Rcm=250 Ω
2.5 Vpp or ±1.25 V at
5:1 attenuation,
5.0 Vpp or ± 2.50 V at
10:1 attenuation
n/a125 mW calculated by
± 7 VDC to 100 Hz,
± 1.25 V > 100 Hz at
5:1 attenuation,
± 2.5 V > 100 Hz at
10:1 attenuation
selected based on volts/
division (all modes)
± 16 V± 6 V without violating
Diff 10:1 atten 53.9 nV/rt(Hz),
SE A or B 5:1 atten 27.8 nV/rt(Hz),
SE A or B 10:1 atten 47.7 nV/rt(Hz),
CM 5:1 atten 21.8 nV/rt(Hz),
CM 10:1 atten 38.4 nV/rt(Hz)
5:1 atten with >= 18 GHz
probe head and 13 GHz
probe amp
18 Vpeak Cat 18 Vpeak without violating
2.5 Vpp or ± 1.25 V at
5:1 attenuation,
5.0 Vpp or ± 2.50 V at
10:1 attenuation without
violating max input power
{[rms(vin-vterm)]^2/55]}
for each input
± 6 VDC to 100 Hz,
± 1.25 V > 100 Hz at
5:1 attenuation,
± 2.5 V > 100 Hz at
10:1 attenuation without
violating max input power
5:1 or 10:1 Automatically
selected based on volts/
division (all modes)
max input power
4.5 mVrms in diff mode
5:1 atten with 28 GHz
N5444A probe head and
13 GHz probe amp
max input power
09 | Keysight | InniiMax III/III+ Probing System – Data Sheet
What is InniiMode?
InniiMode allows convenient measurement of differential, single-ended and common
mode signals with a single probe tip - without reconnecting the probe from its
connection point.
10 | Keysight | InniiMax III/III+ Probing System – Data Sheet
Ordering Information
InniiMax III/III+ probe amplier models
Model numberDescriptionRecommended oscilloscope
N2803A30 GHz InniiMax III probe amplierInniium 90000X /Q/Z Series 28 GHz - 63 GHz models
N2802A25 GHz InniiMax III probe amplierInniium 90000X/Q/Z Series 25 GHz models
N28 31A8 GHz InniiMax III+ probe amplierInniium 90000A and S-Series
N2830A4 GHz InniiMax III+ probe amplierInniium 90000A and S-Series
Note: InniiMax III and III+ probe amps are not compatible with existing InniiMax I or II probe heads.
InniiMax III/III+ probe heads
Model numberDescriptionNotes
N2848A InniiMax III QuickTip probe headCompatible with InniiMax III/III+ amp
Supports InniiMode with InniiMax III+ amp
N2849AInniiMax III QuickTip tipsSet of 4 tips
N5445AInniiMax III browser headOrder N5476A for replacement probe tips (set of 4)
N5439AInniiMax III ZIF probe head Order N2838A PC board ZIF (450 Ω), N5440A Ceramic ZIF (450 Ω) or
N5447A Ceramic ZIF (200 Ω) for a set of 5 ZIF tips with plastic sporks
N5444A InniiMax III 2.92 mm/3.5 mm/SMA probe headOrder N5448A 2.92 mm head ex cables to extend the cable length.
Supports InniiMode with InniiMax III+ amp
N5441AInniiMax lll 16 GHz solder-in probe head
N2836AInniiMax III 26 GHz solder-in probe headSupports InniiMode with InniiMax III+ amp
Note: N54xx A InniiMax III/III+ probe heads are not compatible with InniiMax I or II probe amps.
InniiMax III probe adapters
Model numberDescriptionNotes
N5442APrecision BNC adapter (50 Ω)For use with InniiMax I/II/III+ probes, N2750A-52A, N2795A/96A/97A,
1156A-58A etc.
N5449A High impedance probe adapter Includes one N2873A 500MHz 10:1 passive probe
N5 477A Sampling scope adapterFor InniiMax III amp to use with Keysight 86100C DCA-J sampling scope
N1022BProbe adapterFor InniiMax III+ amp to use with 86100C DCA-J sampling scope
N5443A Performance verication and deskew xtureFor InniiMax III and InniiMax III+ >13 GHz
E2655CPerformance verication and deskew xtureFor InniiMa x III+ <=13 GHz and InniiMax I/II
11 | Keysight | InniiMax III/III+ Probing System – Data Sheet
Ordering Information (cont’d)
Probe bandwidth upgrade options (for InniiMax III only)
Model numberDescriptionNotes
N5446A-001 16 GHz to 20 GHz bandwidth upgrade
N5446A-00220 GHz to 25 GHz bandwidth upgrade
N5446A-00325 GHz to 30 GHz bandwidth upgrade
N5446A-00416 GHz to 25 GHz bandwidth upgrade
N5446A-00516 GHz to 30 GHz bandwidth upgrade
N5446A-00620 GHz to 30 GHz bandwidth upgrade
Note: Purchase t wo or more upgrade options to go from 16 to 25 or 30 GHz and 20 to 30 GHz.
To upgrade the probe bandwidth, you simply need to send the probe to the Keysight service center.
Other recommended accessories for InniiMax III/III+ probing system
Model numberDescriptionNotes
N2787A3D probe positionerFor hands-free probing
N5450BExtreme temperature extension cable1 m long , Use N5441A solder-in head for extreme temperature probing
with InniiMax III/III+
N2812A High performance input cable, 2.92 mm connectors,
For use with Inniium 90000-X/Q Series oscilloscope
12 | Keysight | InniiMax III/III+ Probing System – Data Sheet
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