HP 1145A Two-Channel, 750-MHz, Small-Geometry Active Probe for Surface-Mount Devices

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The 2-channel HP 1145A provides easy, light weight and reliable connection to SMDs on PC boards and backplanes, while delivering active probe performance down to the tip. Its unique design also presents a powerful combination of industry standard compatibility and superior reliability. The probe's basic contact is a standard 25-mil square pin socket that houses passive circuitry. The active circuitry is contained in a plastic pod 13 inches from the tip. This design ensures a small, lightweight, and rugged tip.

The electrical performance of the HP 1145A is unmatched by any off-the-shelf probe designed for SMD probing. The probe combines high bandwidth, high input resistance, and low input capacitance. This combination is superior to that of passive divider probes that have higher input capacitance because it provides minimal circuit loading at high and low frequencies. As signal speeds increase, passive divider probes don't deliver the performanceneeded. This lower performance can result in waveshapes that do not represent the actual signal. The HP 1145A used with an HP 54542 scope, for example, introduces the equivalent of only 1/2 of a typical CMOS gate load (approximately 3.0 pF per gate) to a CMOS circuit. Other SMD probes used with comparable scopes can introduce 1-1/2 or more gate loads to the circuit under test.

A versatile set of accessories lets you probe many SMD packages. SMT grabbers provide solid connection to leads with .050" spacings, ground extenders allow for hands free probing of signal-ground pairs with 100-mil spacing. Flexible SMT leads can be soldered to any convenient signal access point. For probing fine pitch SMT down to .5mm (.020") spacing, the HP 10075A .5mm Micrograbber Accessory Kit is available.

The HP 1145A is powered directly by the HP 54520 and HP 54540 Family Oscilloscopes, and the HP 54615B, HP 54616B and the HP 54616C oscilloscopes. For all otherscopes the HP 1142 A Power Supply is needed.


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Bandwidth:1                        Greater than or equal to 750MHz              
RiseTime:1,2                        Less than of equal to 470 ps             
Attenuation3:                      10:1 +/-3%            
Input Resistance:                  1M ohm +/-2% 
Maximum Input Voltage:             +/-40V (dc + peak ac)
1Above 35°C, bandwidth and rise time degrade approximately 1/2%/°C.

2Rise time figure calculated from tr=0.35/Bandwidth.

3When connected to an instrument input of 50 Ohm, +/-0.5%.


Characteristics

Input Capacitance: 2.0-pF (typical) Overshoot and Ringing:1 +/-10% for the first 6 ns +/-4% from 6 ns to20ms +/-1.5% thereafter Output Voltage Offset: Less than +/-10V Input Dynamic Range: +/-6.0V Output Load Requirement: 50 ohm Power Requirements: +/-6V dc +/-2% (at approximately 180 mA each supply) Weight: Net: approximately 8 oz Shipping: approximately 1 kg (2.2 lbs) 1Oscilloscope Characteristics Excluded.


Environmental Characteristics

Temperature: Operating: 0°C to +55°C (32°F to +131°F) Non-Operating: -40°C to +70°C (-40°F to +158°F) Humidity: Operating: up to 95% relative humidity (non-condensing) at +40°C (+104°F) Non-Operating:up to 90% relative humidity at +65°C (+149°F) Altitude: Operating: up to 4,600 meters (15,000 ft) Non-Operating: up to 15,300 meters (50,000 ft) Vibration: Random vibration 5 to 500 Hz 10 minutes per axis, 0.3 grms Random vibration 5 to 500 Hz 10 min per axis, 2.41 grms Resonant search 5 to 500 Hz swept sine, 1 octave/min sweep rate, (0.75g), 5 min resonant dwell at 4 resonances per axis


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HP 1145A           Two-Channel, 750-MHz, Small-Geometry Active Probe
                   for Surface-Mount Devices

HP 1142A Probe Control and Power Module

HP 10075A 0.5 mm MicroGrabber Accessory Kit

HP 10467-68701 1 Package of 4; MicroGrabbers

All orders include the following:

Available accessories for this product include:


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