OPA1688
SBOS724A – SEPTEMBER 2015 – REVISED JUNE 2022
OPA1688 36-V, Single-Supply, 10-MHz, Rail-to-Rail Output,
SoundPlus™ Audio Operational Amplifier
1 Features
3 Description
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THD+N, 50 mW, 32 Ω, 1 kHz, –109 dB
Wide supply range:
The OPA1688 36-V, single-supply, low-noise
SoundPlus™ audio operational amplifier is capable of
operating on supplies ranging from 4.5 V (±2.25 V) to
36 V (±18 V). This latest addition of a high-voltage
audio operational amplifier in conjunction with the
OPA16xx devices provide a family of bandwidth,
noise, and power options to meet the needs of a wide
variety of applications. The OPA1688 is available in
a WSON micropackage, and offers low offset, drift,
and quiescent current. This device also offers wide
bandwidth, fast slew rate, and high output current
drive capability.
– 4.5 V to 36 V, ±2.25 V to ±18 V
Low offset voltage: ±0.25 mV
Low offset drift: ±0.5 µV/°C
Gain bandwidth: 10 MHz
Low input bias current: ±10 pA
Low quiescent current: 1.6 mA per amplifier
Low noise: 8 nV/√Hz
EMI- and RFI-filtered inputs
Input range includes negative supply
Input range operates to positive supply
Rail-to-rail output
High common-mode rejection: 120 dB
Packages:
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Unlike most op amps that are specified at only one
supply voltage, the OPA1688 is specified from 4.5 V
to 36 V. Input signals beyond the supply rails do not
cause phase reversal. The input can operate 100 mV
below the negative rail and within 2 V of the top rail
during normal operation. Note that this device can
operate with full rail-to-rail input 100 mV beyond the
top rail, but with reduced performance within 2 V of
the top rail.
– Industry-standard SOIC-8
– micro WSON-8
2 Applications
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Professional microphones and wireless systems
Professional audio mixer and control surface
Guitar amp and other music instrument amps
A/V receiver
Bookshelf stereo system
Professional audio amplifier (rack mount)
DJ equipment
The OPA1688 is specified from –40°C to +85°C.
Device Information
PART NUMBER
OPA1688
PACKAGE(1)
BODY SIZE (NOM)
4.90 mm × 3.91 mm
3.00 mm × 3.00 mm
SOIC (8)
WSON (8)
Turntable
Special function module
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
C1
1
-40
47pF
R1
768
R2
750
ROUT
0.1
-60
Inverting
–5 V
VAC
–
+
Headphone
Output
0.01
-80
+
OPA1688
VDC
Noninverting
16-ꢀ Load
VAC
R3
768
5 V
ROUT
0.001
-100
-120
32-ꢀ Load
C2
47pF
R4
ROUT
Audio DAC
750
128-ꢀ Load
0.0001
0.001
0.01
0.1
Amplitude (VRMS
1
10
Headphone Amplifier Circuit Configuration
)
C004
Superior THD Performance
(f = 1 kHz, BW = 80 kHz, VS = ±5 V)
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.