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Texas Instruments PGA2311PA
- Part No.:
- PGA2311PA
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
PGA2311PA.pdf
- Description:
- IC VOLUME CONTROL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,505
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Product details
Overview
PGA2311PA from Texas Instruments is an A-grade stereo audio volume control IC with digitally programmable analog gain/attenuation, zero-crossing detection, and mute functionality. It delivers ±5-V analog supply operation, 0.5-dB step resolution across +31.5 dB to −95.5 dB range, and 120-dB dynamic range for professional audio mixing consoles and broadcast studio equipment.
For engineers reviewing the PGA2311PA datasheet, PGA2311PA pinout, PGA2311PA application, or PGA2311PA equivalent, key selection considerations include its A-grade THD+N (0.0002% at 1 kHz), ±1.25-V output voltage swing headroom relative to VA−, PDIP-16 package compatibility, and serial 3-wire interface timing requirements (6.25 MHz max SCLK).
Technical Context
The PGA2311PA implements a resistor-network-based analog gain architecture controlled by an 8-bit straight-binary code per channel, with hardware-mute and zero-crossing–enabled gain transitions. Its internal high-performance op-amp drives 660-Ω loads directly without external buffering.
It uses separate analog (±5 V) and digital (+5 V) supplies, features independent left/right channel control via 16-bit serial frame (MSB-first), and supports daisy-chaining of multiple devices through SDO-to-SDI cascading with 16×N-bit shift register behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | +31.5 dB to −95.5 dB in 0.5-dB steps - enables precise volume control across professional audio signal levels |
| THD+N (1 kHz) | 0.0002% typical - meets A-grade low-distortion requirement for high-fidelity studio applications |
| Dynamic Range | 120 dB - supports wide-swing audio signals with minimal noise floor interference |
| Output Voltage Swing | (VA−) + 1.25 V to (VA+) − 1.25 V - defines usable linear output range under ±5-V analog supplies |
| Serial Clock Max | 6.25 MHz - sets maximum data rate for host controller interface timing compliance |
| Interchannel Crosstalk | −130 dBFS - ensures isolated left/right channel operation in stereo mixing systems |
| Quiescent Current | IA+ = 8–10 mA, IA− = 10–12 mA, ID+ = 0.5–1 mA - determines thermal and power budget for multi-channel designs |
Pinout & Package
PGA2311PA is supplied in a 16-pin PDIP (plastic dual in-line package) with 6.35 mm × 19.30 mm body size and through-hole mounting. Pin numbering follows standard DIP layout with notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ZCEN) | Zero-crossing enable input | Active-high control for glitch-free gain transitions; required for audible artifact suppression |
| 2 (CS) | Chip-select input | Active-low enable for serial interface; must be held low for full 16-bit write cycle |
| 3 (SDI) | Serial data input | Latches 16-bit gain word on rising SCLK edge; MSB-first, straight binary format |
| 4 (VD+) | Digital power supply | +5 V supply for logic circuitry; decoupling critical for noise immunity |
| 5 (DGND) | Digital ground | Reference return for digital I/O; must be separated from analog ground per layout guidelines |
| 6 (SCLK) | Serial clock input | Drives data sampling; max 6.25 MHz; pulse width ≥80 ns high/low |
| 7 (SDO) | Serial data output | Tri-state output used only in daisy-chain configurations; high-impedance when CS is high |
| 8 (MUTE) | Mute control input | Active-low hardware mute; initiates offset calibration and grounds outputs via 10-kΩ resistors |
| 9 (VINR) | Analog input, right channel | Unbalanced input referenced to AGNDR; accepts up to 2.5 Vrms without clipping |
| 10 (AGNDR) | Analog ground, right channel | Return path for right-channel analog signals; must be isolated from DGND except at single point |
| 11 (VOUTR) | Analog output, right channel | Buffered output capable of driving 660-Ω loads directly; swing limited to ±1.25 V from rails |
| 12 (VA+) | Analog power supply, +5 V | Positive analog rail; requires local 0.1-μF bypass capacitor per TI layout recommendations |
| 13 (VA−) | Analog power supply, −5 V | Negative analog rail; same bypassing requirement as VA+; defines lower output limit as (VA−) + 1.25 V |
| 14 (VOUTL) | Analog output, left channel | Identical electrical behavior to VOUTR; supports independent stereo channel routing |
| 15 (AGNDL) | Analog ground, left channel | Return path for left-channel analog signals; shares isolation discipline with AGNDR |
| 16 (VINL) | Analog input, left channel | Unbalanced input referenced to AGNDL; functionally identical to VINR |
Key Features
| Feature | Design Value |
|---|---|
| Noise-free level transitions | Zero-crossing detection with 16-ms timeout ensures mute/gain changes occur without audible clicks or pops |
| Direct load drive capability | Output buffers rated for 660-Ω loads eliminate need for external amplification in line-level audio paths |
| Hardware/software mute independence | Dedicated MUTE pin provides fail-safe muting regardless of serial interface state or register contents |
| Daisy-chain support | SDO-to-SDI cascading allows single 3-wire bus to control N devices using 16×N-bit serial frames |
| A-grade audio performance | 0.0002% THD+N and 120-dB dynamic range meet requirements for broadcast and mastering applications |
Applications
| Professional Mixing Console | Broadcast Studio Monitor System |
|---|---|
Use Scenario: Real-time analog fader control in multichannel analog summing mixers with remote digital supervision. IC Role / Device Role / Timing Role: Stereo analog volume controller with independent left/right gain registers and zero-crossing synchronized updates. Use Value: Enables silent gain adjustments during live broadcast without introducing zipper noise or transient artifacts. |
Use Scenario: Master monitor level control feeding calibrated reference speakers in audio control rooms. IC Role / Device Role / Timing Role: High-accuracy, low-noise stereo attenuator with A-grade THD+N and matched channel tracking. Use Value: Maintains consistent loudness perception across left/right channels with <±0.05 dB gain matching. |
| High-End Car Audio Head Unit | Multi-Track Recording Interface |
Use Scenario: Digital volume control in OEM-grade automotive infotainment systems with analog output stages. IC Role / Device Role / Timing Role: Analog gain block interfaced to microcontroller via 3-wire SPI-compatible bus. Use Value: Delivers 120-dB dynamic range and −130 dBFS crosstalk to preserve signal integrity in electrically noisy vehicle environments. |
Use Scenario: Input channel gain staging in USB/FireWire audio interfaces before ADC conversion. IC Role / Device Role / Timing Role: Pre-ADC analog trim amplifier with software-controllable attenuation to prevent ADC overload. Use Value: Provides +31.5 dB to −95.5 dB range in 0.5-dB steps, enabling precise headroom management for diverse microphone sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio volume control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PGA2311U | U-grade variant with 0.0004% THD+N (vs. 0.0002% for PGA2311PA); same pinout, SOIC-16 package | Targeted at consumer audio where ultra-low distortion is less critical than cost or board space | Select PGA2311U if SOIC-16 surface-mount is preferred and THD+N ≤0.0004% is acceptable |
| CS3310-KS | Crystal Semiconductor part; pin- and software-compatible per TI documentation; same 0.5-dB step, ±5-V supply | Legacy design reuse where CS3310 was previously qualified; identical functional behavior but different manufacturer | Choose CS3310-KS only if existing qualification or supply chain commitments require Crystal parts |
Compared with PGA2311U and CS3310-KS, the PGA2311PA offers the lowest THD+N (0.0002%) and is uniquely specified for PDIP-16 packaging - making it optimal for prototyping, service replacement, and through-hole production where A-grade audio fidelity is mandatory.
Availability
PGA2311PA is available at Aetrix Electronics and suitable for professional audio mixing consoles, broadcast studio monitor systems, and high-end car audio head units requiring stable component supply and long-term industrial availability.
Supply support for PGA2311PA 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 company specializing in analog and embedded processing technologies, with decades of leadership in precision audio signal conditioning.
The PGA2311PA belongs to TI's professional audio volume control product line, designed specifically for high-fidelity analog gain adjustment in studio, broadcast, and premium consumer audio systems where low distortion and channel matching are critical.
FAQ
What is the maximum output voltage swing specification for PGA2311PA?
The PGA2311PA specifies an output voltage range of (VA−) + 1.25 V to (VA+) − 1.25 V under recommended operating conditions. With ±5-V analog supplies, this yields a usable linear output swing of −3.75 V to +3.75 V (7.5 Vpp), ensuring headroom for zero-crossing transitions and avoiding clipping in typical line-level audio applications.
Does PGA2311PA support daisy-chaining with other PGA2311 devices?
Yes, the PGA2311PA supports daisy-chaining via its SDO (pin 7) and SDI (pin 3) pins. When multiple PGA2311PA devices are cascaded, the SDO of one device connects to the SDI of the next, forming a 16×N-bit shift register. The CS signal must remain low for 16×N SCLK cycles to load all devices simultaneously.
How does the zero-crossing detection function work in PGA2311PA?
In PGA2311PA, zero-crossing detection is enabled by asserting ZCEN (pin 1) high. When a new gain setting is written, the change is deferred until either a positive-slope zero crossing is detected on the affected channel's input signal or a 16-ms timeout expires. This prevents audible glitches during real-time volume adjustments.
What is the difference between PGA2311PA and PGA2311U?
The PGA2311PA is the A-grade version in PDIP-16 packaging, featuring 0.0002% THD+N at 1 kHz and ±1.25-V output headroom relative to VA−. The PGA2311U is the U-grade version in SOIC-16 packaging with 0.0004% THD+N and identical functionality otherwise - making PGA2311PA preferable for highest-fidelity through-hole designs.
Can PGA2311PA drive a 600-Ω load directly?
Yes, the PGA2311PA output buffers are characterized to drive 600-Ω loads directly without external amplification. TI's datasheet confirms stable operation and low THD+N (<0.0004%) into 600 Ω at 1 kHz, supporting professional line-level interconnection standards without added buffer stages.
PGA2311PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Volume Control
- Applications:
- Audio, Musical Instruments
- Number of Channels:
- 2
- Interface:
- SPI
- Voltage - Supply:
- ±4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- 31.5dB ~ -95.5dB
- Mounting Type:
- Through Hole
- Grade:
- Automotive
PGA2311PA FAQ
1.How can I place an order for PGA2311PA through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA2311PA 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 PGA2311PA reliable?
The price and inventory of PGA2311PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA2311PA is usually 5 days.
3.What payment methods are accepted for PGA2311PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA2311PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA2311PA?
PGA2311PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA2311PA 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 PGA2311PA?
For technical support, including PGA2311PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA2311PA requirements.
6.How does Aetrix verify that PGA2311PA is sourced from the original manufacturer or authorized distributors?
All PGA2311PA 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 PGA2311PA meets industry standards.
7.What is the process for return or replacement of PGA2311PA?
All PGA2311PA units undergo pre-shipment inspection (PSI). If there is an issue with PGA2311PA, 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 PGA2311PA part is unused and in its original packaging.
Return procedure for PGA2311PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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