ADA-21
Doc. No. – 13911
Page 3 of 3
ADA-21 AUDIO DISTRIBUTION AMPLIFIER
ADJUSTMENTS:
Common Mode Rejection and Gain are both set for optimum performance by Sigma Electronics.
SPECIFICATIONS:
INPUT: ................................ Balanced, +24 dBm Maximum
INPUT IMPEDANCE: .......... 30 k
Ω
Balanced, 15 k
Ω
each line to ground
OUTPUT: ............................ +24 dBm Maximum
OUTPUT IMPEDANCE: ...... 150
Ω
Balanced
ISOLATION: ....................... 70 dB Minimum (15 kHz)
HUM and NOISE: ............... -90 dBm at Unity Gain
THD+N………………………. 0.005% 20 Hz to 20kHz (30kHz LPF)
GAIN RANGE: .................... -9 to +27 dB
CMR: .................................. 70 dB Minimum (20 Hz to 10 kHz)
60 dB Minimum (10 kHz to 20 kHz)
RESPONSE: ....................... +/- 0.2 dB Maximum to 100 kHz at Unity Gain
TECHNICAL MANUAL:
A manual including schematics, circuit description, parts list and setup guide is available upon request. This
information is intended for the service of the module. Modules should be serviced by Qualified Personnel only.
Sigma Electronics, Inc. recommends service to be performed by our Factory Service Center.
All specifications, drawings, dimensions, weights and other details are subject to change without notification.
Information is intended to give a general performance and operation guideline of the product.
Sigma Electronics, Inc.; P.O.Box 448; 1184 Enterprise Road; East Petersburg, PA 17520-0448
Main Office: Tel: (717) 569-2681 Fax: (717) 569-4056
REV1 OCT99
ADA-21
