碌V.
or the added noise of additional offset adjustment circuitry.
鈩?/div>
loads to 10 V rms while
maintaining low distortion. THD + Noise at 3 V rms is a low
0.0006%.
The OP176 is specified over the extended industrial (鈥?0擄C to
+85擄C) temperature range. OP176s are available in both plastic
DIP and SO-8 packages. SO-8 packages are available in 2500
piece reels. Many audio amplifiers are not offered in SO-8
surface mount packages for a variety of reasons, however, the
OP176 was designed so that it would offer full performance in
surface mount packaging.
7
The OP176 is a low noise, high output drive op amp that
features the Butler Amplifier front-end. This new front-end
design combines both bipolar and JFET transistors to attain
amplifiers with the accuracy and low noise performance of
bipolar transistors, and the speed and sound quality of JFETs.
Total Harmonic Distortion plus Noise equals previous audio
amplifiers, but at much lower supply currents.
Improved dc performance is also provided with bias and offset
currents greatly reduced over purely bipolar designs. Input
offset voltage is guaranteed at 1 mV and is typically less than
*Protected by U.S. Patent No. 5101126.
RB4
RB5
RB2
QB4
CB1
QB3
J1
2
JB1
QB2
Q3
RB1
R3
R1L
QB1
Z1
CC1
R1A
R1P2
1
R1S
R1P1
R2P1
QB8
R2S
5
R2P2
R2L
QB9
Q7
Q5
Q4
QS3
CF
Q6
Q8
Q1
Z2
J2
Q2
3
Q9
CCB
CC2
RB3
QB5
QB6
QB7
RB7
RB6
R4
Q10
QS1
RS1
R5
6
RS2
QS2
Q11
R2A
4
Simplified Schematic
REV. 0
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