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Texas Instruments INA1620RTWR
- Part No.:
- INA1620RTWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
INA1620RTWR.pdf
- Description:
- IC AUDIO 2 CIRCUIT 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,172
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Product details
Overview
INA1620RTWR from Texas Instruments is a dual-channel, high-fidelity audio operational amplifier with integrated thin-film resistor pairs and on-chip EMI filters. It delivers ultra-low THD+N (–119 dB at 1 kHz into 32 Ω), 2.8 nV/√Hz input voltage noise, and ±18 V dual-supply operation - enabling high-resolution headphone driver and professional audio line-stage designs.
For engineers reviewing the INA1620RTWR datasheet, INA1620RTWR pinout, INA1620RTWR application, or INA1620RTWR equivalent, key selection criteria include matched resistor pair tolerance (0.004% typ), shutdown current (5 µA/ch), capacitive-load drive capability (>600 pF), and channel separation (140 dB at 1 kHz) in the 24-pin WQFN package.
Technical Context
The INA1620RTWR integrates two bipolar-input op-amps with four independent 1-kΩ thin-film resistor pairs (R1–R4), each with center-tap terminals (e.g., R1A/R1B/R1C), enabling precision instrumentation, gain-setting, and filter configurations without external matching. Its single-gain-stage architecture achieves 136 dB open-loop gain into 600 Ω while maintaining 10 V/μs slew rate and 32 MHz GBW at G = +1000.
EMI filtering is implemented per input pin (IN+ A/B, IN− A/B) with corner frequency ≥500 MHz, and the enable circuit uses ground-referenced logic thresholds (VIH = 0.82 V, VIL = 0.78 V) to minimize pop-and-click during shutdown transitions - critical for consumer audio interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | –119 dB at 1 kHz, 150 mW into 32 Ω - enables distortion-free headphone output at full volume |
| Input Voltage Noise | 2.8 nV/√Hz at 1 kHz - preserves signal integrity in low-level microphone preamp or DAC output stages |
| Resistor Matching | 0.004% typical (RxA/RxB/RxC per pair) - supports precision differential amplifiers and active filters without trimming |
| Supply Range | ±2 V to ±18 V - accommodates both portable (±5 V) and studio-grade (±15 V) audio rails |
| Channel Separation | 140 dB at 1 kHz - prevents crosstalk in stereo summing or dual-mono monitoring applications |
| Capacitive Load Drive | >600 pF - ensures stability with long cables, PCB traces, or downstream ADC input capacitance |
| Shutdown Current | 5 µA per channel - enables battery-powered mute control without compromising system standby power |
Pinout & Package
INA1620RTWR is housed in a 4.00 mm × 4.00 mm, 24-pin WQFN package with exposed thermal pad connected to VEE (negative supply). The package supports high-density audio PCB layouts and efficient heat dissipation via thermal vias to internal ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 3) | Reference ground | Provides stable reference for enable logic and compensation capacitor; required for PSRR optimization |
| EN (Pin 16) | Enable control input | Logic-high (≥0.82 V) enables both channels; logic-low disables with <5 µA quiescent draw per channel |
| IN+ A / IN− A (Pins 22/21) | Differential inputs, Channel A | EMI-filtered inputs support clean signal acquisition in noisy environments (e.g., USB audio interfaces) |
| OUT A / OUT B (Pins 17/14) | Amplifier outputs | Capable of driving 32 Ω loads at 150 mW; rail-to-rail swing limited to 1 V from rails at 600 Ω |
| R1A/R1B/R1C (Pins 24/23/1) | Resistor pair 1 terminals | Three-terminal 1-kΩ thin-film network - enables precision gain-of-2, difference amplification, or T-network filters |
| VCC / VEE (Pins 2/5) | Positive/negative supplies | Supports symmetrical ±18 V or asymmetrical single-supply operation (4–36 V total) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated EMI filters | On-die RC networks on all four inputs suppress RF ingress above 500 MHz - eliminates need for external ferrites in compact enclosures |
| Matched thin-film resistors | Four 1-kΩ resistor pairs with 0.004% matching and ±0.07 ppm/°C drift - replaces discrete matched arrays in precision audio summing amps |
| Low-pop shutdown | Controlled bias sequencing during EN transition reduces audible transients - essential for consumer-grade headphone jack detection |
| High-output-current drive | Delivers ±130 mA sink/source into short-circuit - sustains robust performance with reactive speaker loads or long interconnects |
| Wide common-mode range | (V−) + 1.5 V to (V+) − 1 V - supports DC-coupled operation across full supply range without level-shifting |
Applications
| Professional Audio Mixer Input Stage | HiFi Headphone Amplifier |
|---|---|
Use Scenario: Balanced line-level signal conditioning in analog mixing consoles with 16+ channels. IC Role / Device Role / Timing Role: Dual-channel precision op-amp with integrated matched resistors implements unity-gain differential receivers and programmable gain stages. Use Value: 140 dB channel separation and –132 dB THD+N at 2 kΩ load prevent inter-channel bleed and preserve dynamic range across dense channel counts. | Use Scenario: High-resolution headphone driver for portable DAC/headphone combos supporting 32 Ω IEMs and 600 Ω planar magnetics. IC Role / Device Role / Timing Role: Output stage delivering 150 mW into 32 Ω with ultra-low noise floor (2.8 nV/√Hz) and no pop/click during playback start/stop. Use Value: Integrated EMI filters suppress smartphone RF noise; shutdown mode cuts idle current to 5 µA/ch for >100-hour battery life. |
| Digital Audio Workstation (DAW) Monitor Controller | Audio Test & Measurement Instrumentation |
Use Scenario: Analog volume control and stereo summing in desktop monitor controllers with digital volume ICs and relay-based source switching. IC Role / Device Role / Timing Role: Dual op-amp configured as active attenuator and passive summing amplifier using on-chip R1–R4 resistor networks. Use Value: 0.004% resistor matching ensures identical left/right attenuation accuracy (<0.01 dB error), eliminating stereo image shift. | Use Scenario: Reference-grade signal generator output buffer and analyzer front-end in benchtop audio analyzers (e.g., APx500). IC Role / Device Role / Timing Role: Low-noise, low-distortion buffer isolating D/A converter from variable test loads while maintaining flat 20 Hz–20 kHz response. Use Value: –135 dB IMD (SMPTE) and >100 dB SNR enable measurement of sub-100 µV residual distortion in Class-D amplifier evaluation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel audio op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1612AIDR | Lower noise (1.1 nV/√Hz), no integrated resistors, no EMI filters, SOIC-8 package | Requires external matched resistors; unsuitable for space-constrained PCBs needing on-die precision networks | Select when ultimate noise performance is prioritized over integration and board area |
| LM4562MAX | Higher quiescent current (3.6 mA/ch), no shutdown, no integrated resistors, SOIC-8 | Lacks enable control and resistor integration; requires external gain-setting networks and EMI mitigation | Select for cost-sensitive, non-portable applications where shutdown and layout density are not required |
Compared with OPA1612AIDR and LM4562MAX, the INA1620RTWR uniquely combines ultra-low distortion, on-die matched resistors, and EMI filtering in a space-saving WQFN - reducing BOM count by up to 8 passive components per channel while enabling RF-robust portable audio designs.
Availability
INA1620RTWR is available at Aetrix Electronics and suitable for high-fidelity headphone drivers, professional audio mixing consoles, and audio test and measurement equipment requiring stable component supply and consistent parametric performance across production batches.
Supply support for INA1620RTWR 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 leadership in high-performance audio signal chain solutions.
The INA1620RTWR belongs to TI's Precision Audio Amplifier family, engineered specifically for applications demanding ultra-low distortion, wide dynamic range, and integrated passive precision - targeting professional audio infrastructure and premium consumer audio endpoints.
FAQ
What is the maximum supply voltage rating for the INA1620RTWR?
The INA1620RTWR supports a total supply voltage range of ±2 V to ±18 V (i.e., 4 V to 36 V total), with absolute maximum ratings up to ±20 V. Operation beyond ±18 V is not recommended, as electrical characteristics are only specified within the ±2 V to ±18 V range per the SBOS859B datasheet.
Does the INA1620RTWR require external compensation components?
No, the INA1620RTWR is internally compensated and stable for gains ≥1 (both inverting and non-inverting configurations). Its 32 MHz gain-bandwidth product and 10 V/μs slew rate are fully characterized without external compensation, though external feedback networks using its integrated resistors (e.g., R1A/R1B/R1C) are commonly employed for precision gain setting.
How does the EMI filtering on the INA1620RTWR function?
The INA1620RTWR incorporates on-die RC low-pass filters on each of its four input pins (IN+ A/B, IN− A/B), with a corner frequency ≥500 MHz. These filters attenuate RF interference before it reaches the amplifier core, eliminating the need for discrete feedthrough capacitors or ferrite beads in compact audio PCB layouts - verified by TI's C005 FFT plots showing –133.6 dBc second-harmonic suppression.
Can the integrated resistor pairs in the INA1620RTWR be used independently of the amplifiers?
Yes - the four 1-kΩ thin-film resistor pairs (R1–R4) operate independently of the amplifier cores. Their terminals (e.g., R1A/R1B/R1C) remain functional even when EN = low (shutdown mode), provided VCC and VEE are powered. However, voltages applied to resistor terminals must stay within (V−) − 0.5 V to (V+) + 0.5 V to avoid forward-biasing ESD diodes.
What thermal considerations apply to the INA1620RTWR's exposed thermal pad?
The exposed thermal pad on the INA1620RTWR (RTW package) must be soldered and connected to VEE (negative supply) via multiple thermal vias to an internal copper pour. TI specifies RθJB = 13.1 °C/W; failure to thermally connect the pad increases junction temperature significantly - potentially triggering thermal shutdown or degrading long-term reliability under sustained 150-mW/channel output conditions.
INA1620RTWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 32 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.2 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 2.6mA (x2 Channels)
- Current - Output / Channel:
- 145 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
INA1620RTWR FAQ
1.How can I place an order for INA1620RTWR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA1620RTWR 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 INA1620RTWR reliable?
The price and inventory of INA1620RTWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA1620RTWR is usually 5 days.
3.What payment methods are accepted for INA1620RTWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA1620RTWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA1620RTWR?
INA1620RTWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA1620RTWR 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 INA1620RTWR?
For technical support, including INA1620RTWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA1620RTWR requirements.
6.How does Aetrix verify that INA1620RTWR is sourced from the original manufacturer or authorized distributors?
All INA1620RTWR 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 INA1620RTWR meets industry standards.
7.What is the process for return or replacement of INA1620RTWR?
All INA1620RTWR units undergo pre-shipment inspection (PSI). If there is an issue with INA1620RTWR, 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 INA1620RTWR part is unused and in its original packaging.
Return procedure for INA1620RTWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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