Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Topology | Stereo DirectPath headphone amplifier with ground-referenced outputs |
| Supply | 2.5 V to 5.5 V |
| Output Power | 138-mW-class stereo headphone output; configurable receiver BTL mode also supported |
| Control | I²C; 64-step audio-taper volume, channel enables and mutes |
| Audio Input | Differential inputs; 68 dB stated CMRR |
| PSRR / Noise | >100 dB stated PSRR; 9 µVrms typical A-weighted output noise |
| Quiescent Current | 4 mA typical stated |
| Exact Package / Packing | QFN (RTJ), 20 pins; 3000-piece large reel; −40°C to +85°C; marking BSG |
Product Overview
TPA6130A2RTJR is a digitally controlled stereo headphone amplifier for portable and embedded audio products that need software volume and mute control without adding a separate audio codec output stage. DirectPath circuitry generates ground-referenced outputs so large series DC-blocking capacitors are not required.
The I²C register interface provides 64 volume steps plus independent channel enables/mutes. This makes the part better suited to software-managed audio systems than fixed-gain analog headphone amplifiers.
High PSRR is important when the amplifier shares a battery or noisy system rail. The exact RTJR order code is the 20-pin QFN 3000-piece reel, and exposed-pad layout affects both thermal and ground performance.
For related devices, see HKEQGOO’s Audio Amplifiers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TPA6130A2RTJR |
| Topology | Stereo DirectPath headphone amplifier with ground-referenced outputs |
| Supply | 2.5 V to 5.5 V |
| Output Power | 138-mW-class stereo headphone output; configurable receiver BTL mode also supported |
| Control | I²C; 64-step audio-taper volume, channel enables and mutes |
| Audio Input | Differential inputs; 68 dB stated CMRR |
| PSRR / Noise | >100 dB stated PSRR; 9 µVrms typical A-weighted output noise |
| Quiescent Current | 4 mA typical stated |
| Exact Package / Packing | QFN (RTJ), 20 pins; 3000-piece large reel; −40°C to +85°C; marking BSG |
| Manufacturer Status | Active / Production |
| Part Marking | BSG |
Functional Highlights
I²C control moves user-volume and mute behavior into software
A host can sequence channels, implement smooth volume changes and configure stereo/mono/receiver modes without analog switches or potentiometers.
DirectPath removes output coupling capacitors
Ground-centered outputs reduce component height and avoid the low-frequency roll-off that can occur with small headphone coupling capacitors.
Design Considerations
- Route differential inputs away from digital I²C and charge-pump switching nodes.
- Use the QFN exposed pad as recommended for low-impedance ground and heat spreading.
- Check headphone impedance and target SPL against the exact output-power/distortion condition.
Product Status and Exact Order Code
Texas Instruments lists TPA6130A2RTJR as Active / Production; QFN (RTJ), 20 pins; 3000-piece large tape and reel; −40°C to +85°C; marking BSG.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
For stereo headphone output where an I²C volume-control bus is unnecessary, compare TPA6132A2RTER, a TI DirectPath fixed-gain stereo amplifier (25 mW per channel class in its specified conditions). This TPA6130A2RTJR provides digitally controlled volume over I²C and a different output-power/package configuration. TI lists different 16-pin versus 20-pin WQFN footprints, control circuitry and power performance; these parts are engineering choices, not pin-compatible substitutes.
