My Inquiry
My Account
Texas Instruments OPA2134UAG4
- Part No.:
- OPA2134UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2134UAG4.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2134UAG4 from Texas Instruments is a dual-channel, FET-input audio operational amplifier optimized for high-fidelity signal conditioning in professional and consumer audio systems. It delivers ultra-low THD+N (0.00008% at 1kHz), 8nV/√Hz input voltage noise, 20V/µs slew rate, and rail-to-rail output swing within 1V of supply rails - enabling clean amplification in line drivers, preamplifiers, and active filters operating from ±2.5V to ±18V supplies.
For engineers reviewing the OPA2134UAG4 datasheet, OPA2134UAG4 pinout, OPA2134UAG4 application, or OPA2134UAG4 equivalent, this page provides verified specifications, package mapping to SOIC-8, channel-isolated dual-amplifier architecture, headroom performance (21.3dBu), and real-world design context for audio signal chain selection.
Technical Context
The OPA2134UAG4 implements a true JFET-input stage with 5pA input bias current and 10¹³Ω input impedance, eliminating crossover distortion and enabling stable operation with high-impedance sources. Its unity-gain-stable architecture supports wide-bandwidth applications up to 8MHz gain-bandwidth product while maintaining low inter-channel crosstalk (>128dB DC, >126dB at 20kHz).
Designed specifically for audio, it avoids phase reversal under common-mode overvoltage and features internal current limiting (±30–36mA) with thermal protection. The dual-core layout ensures complete circuit independence - preventing interaction between channels during overload or short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1kHz, 3Vrms, 2kΩ load - enables transparent audio reproduction without audible harmonic artifacts |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves low-level signal integrity in microphone preamps and phono stages |
| Slew Rate | 20V/µs - supports full-swing transient response up to 1.3MHz full-power bandwidth without slewing distortion |
| Open-Loop Gain | 120dB into 2kΩ - ensures precise DC accuracy and minimal gain error in precision gain stages |
| Supply Range | ±2.5V to ±18V - accommodates both battery-powered portable gear and high-headroom studio equipment |
| Output Swing | Within 1V of rails (e.g., ±14V on ±15V supply) - maximizes dynamic range and reduces clipping risk |
| Channel Separation | 128dB at DC, 126dB at 20kHz - prevents audible crosstalk in stereo line receivers and mixer summing amps |
Pinout & Package
OPA2134UAG4 is housed in an 8-pin SOIC (SO-8) surface-mount package with exposed pad (G4 suffix denotes green, RoHS-compliant, lead-free finish). Pin numbering follows standard JEDEC MS-012AC, with pins 1–8 arranged counterclockwise from the top-left corner marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; capable of ±30mA sink/source with rail-to-rail swing |
| 2 | –IN A | Inverting input, channel A - forms feedback node in inverting configurations; virtual ground reference |
| 3 | +IN A | Noninverting input, channel A - high-impedance (10¹³Ω) node; requires matched source impedance ≥2kΩ for lowest distortion |
| 4 | V– | Negative power supply - must be bypassed with ≥10nF ceramic capacitor near pin for stability |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; identical specs and layout rules apply |
| 6 | –IN B | Inverting input, channel B - independent signal path; no crosstalk coupling to channel A even under overload |
| 7 | OUT B | Amplifier B output - fully decoupled from OUT A; supports independent gain/feedback networks |
| 8 | V+ | Positive power supply - shared rail for both amplifiers; requires local 10nF+ bypass to ground |
Key Features
| Feature | Design Value |
|---|---|
| True FET input stage | 5pA input bias current and 10¹³Ω input impedance - eliminates thermal drift errors and enables high-Z sensor interfacing |
| No phase reversal | Operates safely with inputs extended 10V beyond rails - prevents catastrophic latch-up in voltage-follower line receivers |
| Unity-gain stable | Stable with CL ≤ 100pF and any resistive feedback - simplifies PCB layout and eliminates need for external compensation |
| Low-noise optimization | 8nV/√Hz voltage noise + 3fA/√Hz current noise - delivers best-in-class SNR across 20Hz–20kHz audio band |
| High-output drive | ±30mA short-circuit current and 0.01Ω closed-loop output impedance at 10kHz - drives 600Ω lines and capacitive loads directly |
Applications
| Professional Audio Line Driver | Studio Preamplifier Stage |
|---|---|
Use Scenario: Driving balanced XLR outputs from analog mixing consoles to long cable runs in live sound environments. IC Role / Device Role / Timing Role: Dual-channel voltage buffer and level shifter with high CMRR and low output impedance. Use Value: 128dB channel separation and 21.3dBu headroom prevent crosstalk and clipping during peak transients. |
Use Scenario: Low-noise gain stage in condenser microphone preamplifiers requiring 40–60dB of clean amplification. IC Role / Device Role / Timing Role: First-stage FET-input op amp providing high-Z input matching and minimal added noise. Use Value: 8nV/√Hz input voltage noise dominates only below 2kΩ source impedance - preserves mic capsule SNR. |
| Active Crossover Network | Multimedia Audio DAC Output Buffer |
Use Scenario: Splitting full-range signals into low/mid/high bands using 2nd-order active filters in powered loudspeakers. IC Role / Device Role / Timing Role: Dual op amp implementing simultaneous low-pass and high-pass filter sections. Use Value: Unity-gain stability and 8MHz GBW ensure accurate phase alignment and minimal group delay across bands. |
Use Scenario: Post-DAC analog reconstruction filtering and volume control interface in USB DACs and streaming audio players. IC Role / Device Role / Timing Role: Dual-channel I/V converter and output driver delivering low-distortion line-level signals. Use Value: 0.00008% THD+N and rail-swing capability maintain fidelity from digital source through analog output stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134PA | Same silicon die, PDIP-8 package (through-hole), higher RθJA (71°C/W vs 160°C/W), same electrical specs | Preferred for prototyping, breadboarding, or legacy through-hole designs; not suitable for high-density SMT layouts | Select OPA2134PA only when manual assembly or socketing is required; OPA2134UAG4 is optimal for automated SMT production. |
| OPA2604AU | Higher quiescent current (9mA vs 5mA), wider GBW (20MHz), higher THD+N (0.0001%), different pinout (SO-8 but non-compatible) | Better suited for wideband active filters and ultrasonic applications; less ideal for ultra-low-noise mic preamp front-ends | Choose OPA2604AU when bandwidth >10MHz is critical; retain OPA2134UAG4 for lowest THD+N and noise in audiophile-grade line stages. |
Compared with OPA2134PA and OPA2604AU, the OPA2134UAG4 uniquely balances ultra-low distortion (0.00008%), industry-leading noise (8nV/√Hz), and SOIC-8 manufacturability - making it the preferred choice for high-volume, high-fidelity audio PCBs where thermal performance and SMT compatibility are essential.
Availability
OPA2134UAG4 is available at Aetrix Electronics and suitable for professional audio equipment, studio recording interfaces, and high-end multimedia systems requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for OPA2134UAG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and audio signal conditioning ICs.
The OPAx134 family was engineered specifically for high-end audio applications - emphasizing ultra-low distortion, low noise, and robust DC performance to replace discrete JFET front-ends in studio-grade equipment.
FAQ
What is the maximum supply voltage for OPA2134UAG4?
The OPA2134UAG4 supports dual-supply operation from ±2.5V to ±18V, corresponding to a total supply range of 5V to 36V. Absolute maximum ratings specify 36V across V+ and V–, but recommended operation stays within ±18V to ensure specified THD+N, noise, and output swing performance. Exceeding ±18V may degrade distortion and reliability without guaranteeing improved headroom.
Does OPA2134UAG4 require external compensation?
No, the OPA2134UAG4 is unity-gain stable and does not require external compensation components. Its internal compensation ensures stability with resistive feedback networks and capacitive loads up to 100pF. For larger capacitive loads (e.g., >100pF cables), a small series resistor (24Ω–51Ω) at the output is recommended to suppress peaking, as confirmed in TI's Figure 5-23.
How does OPA2134UAG4 handle input overvoltage conditions?
The OPA2134UAG4 incorporates input cascode circuitry that maintains low input bias current over a wide common-mode range (–12.5V to +11.5V on ±15V supplies) and prevents phase reversal - even when inputs exceed rails by up to 10V. This makes it robust in line-receiver applications where transient surges or improper termination may occur, unlike older FET-input op amps such as the OP176.
Can OPA2134UAG4 drive 600Ω loads effectively?
Yes, the OPA2134UAG4 delivers 0.00015% THD+N into 600Ω at 1kHz and provides ±30mA output current capability. Its closed-loop output impedance is just 0.01Ω at 10kHz, ensuring minimal signal loss and frequency response degradation when driving professional audio line loads. For sustained 600Ω operation, ensure adequate PCB copper area and thermal relief to manage power dissipation.
What is the significance of the 'G4' suffix in OPA2134UAG4?
The 'G4' suffix indicates a green, lead-free, RoHS-compliant SOIC-8 package with matte-tin lead finish and no brominated flame retardants. It reflects TI's standard industrial-grade packaging for surface-mount assembly - compatible with standard reflow profiles (J-STD-020) and traceable via lot code marking. The 'UAG4' variant replaces legacy 'UA' (SOIC-8) and 'P' (PDIP-8) versions in new designs requiring environmental compliance.
OPA2134UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4mA (x2 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2134UAG4 FAQ
1.How can I place an order for OPA2134UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2134UAG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA2134UAG4 reliable?
The price and inventory of OPA2134UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2134UAG4 is usually 5 days.
3.What payment methods are accepted for OPA2134UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2134UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2134UAG4?
OPA2134UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2134UAG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA2134UAG4?
For technical support, including OPA2134UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2134UAG4 requirements.
6.How does Aetrix verify that OPA2134UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA2134UAG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA2134UAG4 meets industry standards.
7.What is the process for return or replacement of OPA2134UAG4?
All OPA2134UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2134UAG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA2134UAG4 part is unused and in its original packaging.
Return procedure for OPA2134UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2134UAG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
