OPA1688 Datasheet, PDF (1/41 Pages) Texas Instruments – OPA168x SoundPlus 36-V, Single-Supply, 10-MHz, Rail-to-Rail Output Operational Amplifiers

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Burr-Brown Audio
OPA1688, OPA1689
SBOS724 – SEPTEMBER 2015
OPA168x
SoundPlus 36-V, Single-Supply, 10-MHz, Rail-to-Rail Output Operational Amplifiers
1 Features
•1 THD+N, 50 mW, 32 Ω, 1 kHz, –109 dB
• Wide Supply Range:
– 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
• Industry-Standard Packages:
– SOIC-8 and SOIC-14
• microPackages:
– Dual in WSON-8, Quad in VQFN-16
2 Applications
• Headphone Driver
• Analog and Digital Mixers
• Audio Effects Processors
• Transducer Amplifiers
• Musical Instruments
• A/V Receivers
• DVD and Blu-Ray™ Players
• Car Audio Systems
3 Description
The OPA1688 and OPA1689 are a family of
SoundPlus™ 36-V, single-supply, low-noise
operational amplifiers capable of operating on
supplies ranging from 4.5 V (±2.25 V) to 36 V
(±18 V). This latest addition of high-voltage audio
operational amplifiers, 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 OPA168x are available in
micropackages, and offer low offset, drift, and
quiescent current. These devices also offer wide
bandwidth, fast slew rate, and high output current
drive capability. The dual and quad versions all have
identical specifications for maximum design flexibility.
Unlike most op amps that are specified at only one
supply voltage, the OPA168x family 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 these
devices 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.
The OPA168x series of op amps are specified from
–40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA1688
SOIC (8)
WSON (8)
4.90 mm × 3.91 mm
3.00 mm × 3.00 mm
OPA1689⁽²⁾
SOIC (14)
VQFN (16)
8.65 mm × 3.91 mm
3.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) Product-preview device.
Headphone Amplifier Circuit Configuration
C1
47pF
ROUT
VAC
R1
768
VDC
VAC
R3
ROUT
768
R2
750
-5 V
-
+ ⁺ _OPA1688
5V
Headphone
Output
Audio DAC
R4
750
C2
47pF
1
Superior THD Performance
(f = 1 kHz, BW = 80 kHz, V_S = ±5 V)
1
-40
0.1
Inverting
0.01
Noninverting
0.001
0.0001
0.001
16- Load
32- Load
128- Load
0.01
0.1
1
Amplitude (V_RMS)
-60
-80
-100
-120
10
C004
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.