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OPA1677

更新时间： 2024-11-24 02:46:27
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OPA167x Low-Distortion Audio Operational Amplifiers

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OPA1677, OPA1678, OPA1679  
SBOS855D – JANUARY 2017 – REVISED DECEMBER 2021  
OPA167x Low-Distortion Audio Operational Amplifiers  
The OPA167x amplifiers achieve a low 4.5-nV/√Hz  
noise density and low distortion of 0.0001% at 1 kHz,  
which improves audio signal fidelity. These devices  
also offer rail-to-rail output swing to within 800 mV  
with a 2-kΩ load, which increases headroom and  
maximizes dynamic range.  
1 Features  
•
•
•
•
•
Low noise: 4.5 nV/√Hz at 1 kHz  
Low distortion: 0.0001% at 1 kHz  
High open-loop gain: 114 dB  
High common-mode rejection: 110 dB  
Low quiescent current:  
To accommodate the power-supply constraints of  
many types of audio products, the OPA167x operate  
over a very-wide supply range of ±2.25 V to ±18 V  
(or 4.5 V to 36 V) on only 2 mA of supply current.  
These op amps are unity-gain stable and have  
excellent dynamic behavior over a wide range of load  
conditions, allowing the OPA167x to be used in many  
audio circuits.  
– 2 mA per channel  
•
•
•
•
•
•
Low input bias current: 10 pA (typical)  
Slew rate: 9 V/μs  
Wide gain bandwidth: 16 MHz (G = 1)  
Unity-gain stable  
Rail-to-rail output  
Wide supply range:  
– ±2.25 V to ±18 V, or 4.5 V to 36 V  
Single, dual, and quad-channel versions  
Available packages:  
The OPA167x amplifiers use completely independent  
internal circuitry for lowest crosstalk and freedom from  
interactions between channels, even when overdriven  
or overloaded.  
•
•
– Single: SOIC-8 (preview), SOT-23  
– Dual: SOIC-8, small SON-8, VSSOP-8  
– Quad: Small QFN-16, SO-14, TSSOP-14  
Temperature range: –40°C to +85°C  
Device Information  
PACKAGE(1)  
SOIC (8) - Preview  
SOT-23 (5)  
SOIC (8)  
BODY SIZE (NOM)  
4.90 mm × 3.91 mm  
2.90 mm × 1.60 mm  
4.90 mm × 3.91 mm  
3.00 mm × 3.00 mm  
3.00 mm × 3.00 mm  
8.65 mm × 3.91 mm  
5.00 mm × 4.40 mm  
4.00 mm × 4.00 mm  
•
PART NUMBER  
OPA1677  
2 Applications  
•
•
•
Professional microphones and wireless systems  
Professional audio mixer/control surface  
Guitar amplifier and other music instrument  
amplifier  
OPA1678  
OPA1679  
VSSOP (8)  
SON (8)  
•
•
A/V receiver  
Automotive external amplifier  
SOIC (14)  
TSSOP (14)  
QFN (16)  
3 Description  
The  
single-channel  
OPA1677,  
dual-channel  
(1) For all available packages, see the package option  
addendum at the end of the data sheet.  
OPA1678, and quad-channel OPA1679 (OPA167x)  
op amps offer higher system-level performance over  
legacy op amps commonly used in audio circuitry.  
V+  
0.1  
0.01  
-60  
Gain = 10 V/V  
Gain = 1 V/V  
Gain = -1 V/V  
Tail  
Current  
V
BIAS1  
-80  
V
V
+
IN  
Class AB  
V
Control  
O
Circuitry  
0.001  
-100  
-120  
-140  
-
IN  
V
BIAS2  
0.0001  
0.00001  
10  
100  
1k  
Frequency (Hz)  
10k  
V-  
C002  
Simplified Internal Schematic  
THD+N vs Frequency (2-kΩ Load)  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
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