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990A+ opamp

990A+ opamp
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$73.15AUD inc GST for Australian Customers
(Approx $49.19USD outside Australia)

(Quantity discounts available)


Product Information
Quantity Discounts
Stock Level25

Our modern version on the Deane Jensen 990 opamp. Due to our improved dual constant currents tracking more than 10 times better than the original, the C upgrade for wide voltage range is not needed so the design is closer to the original 990 version but can run on even wider voltage range. We have added the A update to protect against +V loss drawing high current from output to -V which can damage output transformers. The same original 990A circuit in SMD and through-hole with aluminum heatsink for better cooling.

  • Wider voltage range +/-12vdc to +/-28vdc
  • Draws 25mA @ idle
  • Improved Dual Constant Currents
  • SSM2212 2 x 50 transistor matched input pair replaces LM394 
  • Open repairable SMD design

 

Test Summary @ +/-24vdc

Frequency response (from 40 Hz to 15 kHz), dB
+0.02, -0.03
Excellent
THD, %
0.00205
Excellent
THD + Noise, dB (A)
-114.5
   Excellent
IMD + Noise, %     0.00217
Excellent
General performance
 
Excellent

 

Frequency response


 

 
Left
Right
From 20 Hz to 20 kHz, dB
-0.04, +0.07
-0.04, +0.07
From 40 Hz to 15 kHz, dB
-0.03, +0.02
-0.03, +0.02

 

THD + Noise (at -3 dB FS)

Spectrum graph
 

 
Left
Right
THD, %
0.00205
0.00205
THD + Noise, %
0.00209
0.00209
THD + Noise (A-weighted), %
0.00205
0.00205

 

Intermodulation distortion

Spectrum graph
 

 
Left
Right
IMD + Noise, %
0.00217
0.00217
IMD + Noise (A-weighted), %
0.00211
0.00211

You can save money on this item when you purchase several at a time. The table below shows the minimum quantities required to benefit from this offer, and how much they'll cost.


QuantityPrice per unit
1$73.15AUD
10+$71.50AUD
25+$66.00AUD

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