Jensen Transformers CI-2MINI Specifications

PC AUDIO GROUND ISOLATOR

STOPS HUM AND BUZZ IN PC/MULTIMEDIA INTERFACES

M Eliminates the inherent ground noise coupling mechanism
M Common-mode ground noise rejection of 95 dB at 60 Hz
M Wide bandwidth:
M Handles signals up to 7 volts at 20 Hz or 11 volts at 30 Hz
M Input impedances are 49 k

When used in unbalanced audio consumer interfaces, this isolator not only
eliminates hum and buzz but also enhances audio quality by reducing “spectral
contamination” due to ultrasonic and RF interference. To avoid excessive high
frequency losses, no more than 3 feet of cable should be used on its outputs.

!

3 dB at 0.25 Hz and 50 kHz

S

when driving typical 47 kS inputs

CI-2MINI

CI-2MINI SPECIFICATIONS (all levels are input unless noted, +4 dBu = 1.23 V RMS)

PARAMETER CONDITIONS MINIMUM TYPICAL MAXIMUM

Input impedance, Zi 1 kHz, +4 dBu, test circuit 1 47.0 kS 48.6 kS 50.0 kS
Insertion Loss 1 kHz, +4 dBu, test circuit 1 0.82 dB 1.0 dB

Magnitude response, ref 1 kHz
Deviation from linear phase (DLP) 20 Hz to 20 kHz, +4 dBu, test circuit 1 +1.4/
Distortion (THD)
Maximum 20 Hz input level 1% THD, test circuit 1 +17 dBu +19 dBu
Common-mode rejection ratio (CMRR)
Output impedance, Zo 1 kHz, test circuit 1 4.65 k
DC resistances
Capacitance 1 kHz, input to output 105 pF

Allowable source impedance (output impedance of device driving the ISO-MAX input) 0 600
Allowable load impedance (input impedance of device loading the ISO-MAX output) 10 kS 47 kS 4
Allowable load capacitance (cable & input capacitance loading the ISO-MAX output) 0 50 pF 100 pF
Temperature range operation or storage 0° C 70° C
Input to Output Voltage Difference

(see IMPORTANT NOTE below)

20 Hz, +4 dBu, test circuit 1
20 kHz, +4 dBu, test circuit 1

1 kHz, +4 dBu, test circuit 1 <0.001%
20 Hz, +4 dBu, test circuit 1 0.04% 0.10%

60 Hz, test circuit 2 95 dB
3 kHz, test circuit 2 85 dB

input 2.26 k
output 1.90 kS

any input to any output shield or any shield to case, 60 Hz

!0.15 dB !0.03 dB ±0.0 dB

!1.0 dB !0.70 dB ±0.0 dB

!0° ±2.0°

S

S

S 2 kS

24 V RMS
34 V peak

All minimum and maximum specifications are guaranteed. Unless noted otherwise, all specifications apply at 25°C. Specifications subject to change
without notice. All information herein is believed to be accurate and reliable, however no responsibility is assumed for its use nor any infringements of
patents which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Jensen Transformers, Inc.

IMPORTANT NOTE: THIS PRODUCT IS NOT INTENDED FOR USE IN CIRCUMSTANCES WHERE THE DC OR PEAK AC VOLTAGE BETWEEN
INPUT AND OUTPUT CONNECTIONS EXCEEDS 34 VOLTS OR WHERE ITS FAILURE COULD CAUSE INJURY OR DEATH.

JENSEN TRANSFORMERS, INC., 9304 Deering Avenue, Chatsworth, CA 91311-5857, USA

01/05 [phone] • FAX [phone] • www.jensen-transformers.com