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Texas Instruments PGA4311UA/1K
- Part No.:
- PGA4311UA/1K
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PGA4311UA/1K.pdf
- Description:
- IC VOLUME CONTROL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
PGA4311UA/1K from Texas Instruments is a 4-channel digitally controlled analog audio volume controller in SOP-28 package, delivering ±5V analog and +5V digital supply operation, −130dBFS interchannel crosstalk, 0.0002% THD+N (A-grade), and 0.5dB step resolution across +31.5dB to −95.5dB gain range. It serves as precision gain-setting IC in professional mixing consoles and broadcast studio equipment.
For engineers reviewing the PGA4311UA/1K datasheet, PGA4311UA/1K pinout, PGA4311UA/1K application, or PGA4311UA/1K equivalent, key selection considerations include zero-crossing–enabled mute transitions, daisy-chainable 3-wire serial interface (SCLK up to 6.25MHz), A-grade THD+N performance, and ±40°C to +85°C industrial temperature operation.
Technical Context
The PGA4311UA/1K implements a resistor-network–based gain control architecture with analog switch arrays and high-performance op amp output stages per channel, enabling direct 600Ω load driving without external buffering. Its internal offset calibration on power-up and MUTE activation ensures glitch-free initialization.
Zero crossing detection (ZCEN pin) synchronizes gain changes to input signal zero crossings-falling or rising edge-with 16ms timeout fallback; daisy-chaining uses SDO-to-SDI cascading with 32-bit per device frame format (MSB-first, straight binary), supporting multi-device volume coordination over shared CS/SCLK lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 4 independent analog channels with dedicated input/output pins |
| Gain Range & Resolution | +31.5dB to −95.5dB in precise 0.5dB steps; mute at N=0 (AGND connection) |
| THD+N (1kHz) | 0.0002% typical (A-grade), enabling ultra-low-distortion audio paths in critical listening systems |
| Interchannel Crosstalk | −130dBFS at 1kHz, ensuring isolated channel processing in multi-track recorders |
| Dynamic Range | 120dB (A-grade), supporting >110dB SNR in high-fidelity A/V receivers |
| Supply Voltages | ±4.75V to ±5.25V analog (VA+/VA−), +4.75V to +5.25V digital (VD+), enabling dual-rail audio design |
| Serial Interface Speed | Up to 6.25MHz SCLK, allowing sub-10µs full 32-bit write for real-time volume updates |
Pinout & Package
SOP-28 (SOIC-DW) package with 1.27mm pitch, 10.3mm × 7.5mm body, moisture sensitivity level 2 (260°C peak reflow), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MUTE | Active-low hardware mute control; initiates offset calibration and grounds outputs via 10kΩ resistors |
| 3,10,19,26 | AIN_1 to AIN_4 | Unbalanced analog inputs, each referenced to respective AGND; support ≤2.5Vrms input without clipping |
| 5,8,21,24 | AOUT_1 to AOUT_4 | Buffered analog outputs capable of driving 600Ω loads directly; swing within 1.25V of VA+/VA− rails |
| 2,4,9,11,18,20,25,27 | AGND_x / DGND | Dedicated analog ground pins per channel (AGND_1–AGND_4) plus shared digital ground (DGND); require separate PCB planes |
| 6,23 | VA− | Negative analog supply (−5V); dual pins reduce ground bounce in multi-channel operation |
| 7,22 | VA+ | Positive analog supply (+5V); dual pins ensure low-impedance rail delivery to all op amps |
| 12 | VD+ | +5V digital supply; powers serial interface logic and internal registers |
| 13 | SDI | Serial data input; accepts 32-bit command (8 bits per channel) MSB-first on SCLK rising edge |
| 14 | CS | Chip select; must be held low for entire 32-bit transfer; enables SDO tri-state when high |
| 15 | SCLK | Serial clock input; controls timing of SDI sampling and SDO output (data valid on falling edge) |
| 16 | SDO | Serial data output; supports daisy-chaining by feeding to next device's SDI; high-impedance when CS = high |
| 28 | ZCEN | Zero crossing enable (active-high); activates synchronized gain transitions or defaults to 16ms timeout |
Key Features
| Feature | Design Value |
|---|---|
| Noise-free level transitions | Zero crossing detection (ZCEN) eliminates audible clicks during volume changes; 16ms timeout ensures deterministic behavior |
| Hardware + software mute | MUTE pin provides immediate analog-level muting with offset calibration; software mute (N=0) sets unity gain to AGND |
| Daisy-chainable serial interface | 3-wire (CS/SCLK/SDI) + SDO enables control of N devices with only 3 host pins and 32×N clock cycles |
| Direct 600Ω load drive | Integrated op amp output stages eliminate need for external buffers in professional audio line-level circuits |
| A-grade audio performance | 0.0002% THD+N and 120dB dynamic range meet broadcast and mastering studio requirements |
Applications
| Broadcast Studio Equipment | Mixing Consoles |
|---|---|
Use Scenario: Real-time fader automation and channel balancing in live OB vans and control rooms. IC Role / Device Role / Timing Role: Precision 4-channel analog gain controller with zero-crossing–synchronized updates to prevent program interruption. Use Value: −130dBFS crosstalk prevents bleed between stereo pairs; A-grade THD+N preserves fidelity during repeated gain adjustments. |
Use Scenario: Input channel strip gain staging and subgroup bus level control in analog/digital hybrid consoles. IC Role / Device Role / Timing Role: Digitally addressed analog volume block per channel, interfaced to MCU via daisy-chained serial bus. Use Value: Direct 600Ω drive capability eliminates buffer stages; 0.5dB resolution enables fine-grained mix balance tuning. |
| Multi-Track Recorders | Car Audio Systems |
Use Scenario: Independent track-level monitoring and playback level control in 16+ channel DAW interfaces. IC Role / Device Role / Timing Role: Four-channel programmable attenuator/gain stage with hardware mute for track solo/mute functions. Use Value: 120dB dynamic range captures quiet passages without noise floor interference; ±5V rails support pro-level signal headroom. |
Use Scenario: Source-selectable front/rear/subwoofer channel leveling in premium OEM head units. IC Role / Device Role / Timing Role: Analog volume IC accepting CAN or SPI-hosted commands to adjust speaker-level gains in harsh automotive environments. Use Value: −40°C to +85°C operating range ensures reliability under hood heat; hardware MUTE suppresses turn-on thumps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel audio volume control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PGA4311U/1K | U-grade variant: 0.0004% THD+N (vs. 0.0002% for PGA4311UA/1K), identical pinout, gain range, and interface | Targeted at high-end consumer (not broadcast-critical) audio where 0.0002% THD+N is non-essential | Select PGA4311U/1K for cost-sensitive designs requiring <0.0004% distortion and same functionality |
| PGA4310UA | 2-channel version (vs. 4-channel PGA4311UA/1K); identical A-grade specs, SOP-20 package, same serial protocol | Suitable for stereo-only systems or space-constrained layouts where half the channel count suffices | Choose PGA4310UA when only two channels are needed and board area is limited |
Compared with PGA4311U/1K, the PGA4311UA/1K delivers tighter THD+N for mission-critical audio; versus PGA4310UA, it doubles channel density at the cost of larger SOP-28 footprint-enabling consolidated 4-channel control without inter-device synchronization overhead.
Availability
PGA4311UA/1K is available at Aetrix Electronics and suitable for broadcast studio equipment, mixing consoles, and multi-track recorders requiring stable component supply, long-lifecycle assurance, and A-grade audio performance.
Supply support for PGA4311UA/1K 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, embedded processing, and connectivity technologies, with decades of leadership in high-fidelity audio IC design.
The PGA4311 product line delivers precision digitally controlled analog gain blocks for professional audio infrastructure, engineered to replace mechanical potentiometers while preserving analog signal integrity and dynamic range.
FAQ
What is the operating temperature range for the PGA4311UA/1K?
The PGA4311UA/1K operates from −40°C to +85°C, validated across its full electrical specification range. This industrial temperature grade supports deployment in broadcast trucks, studio racks, and automotive head units where ambient conditions exceed commercial limits. The PGA4311UA/1K maintains 0.0002% THD+N and −130dBFS crosstalk across this range.
How does zero crossing detection work on the PGA4311UA/1K?
When ZCEN is high, the PGA4311UA/1K monitors the selected channel's analog input for zero crossings and delays gain updates until a positive-slope zero crossing occurs-or times out after 16ms. This eliminates audible pops during volume changes. The PGA4311UA/1K performs this per-channel, independently, without requiring host processor intervention.
Can multiple PGA4311UA/1K devices be controlled with one microcontroller?
Yes-the PGA4311UA/1K supports daisy-chaining via its SDO output connected to the next device's SDI input. With shared CS and SCLK lines, a single 3-wire interface can program N devices using a 32×N-bit serial frame. The PGA4311UA/1K's SDO is tri-stated when CS is high, enabling clean bus isolation.
What is the difference between PGA4311UA/1K and PGA4311U/1K?
The PGA4311UA/1K is the A-grade variant with 0.0002% THD+N (typical) and 120dB dynamic range; the PGA4311U/1K is U-grade with 0.0004% THD+N and 116dB dynamic range. Both share identical pinout, gain range, serial interface, and SOP-28 packaging. The PGA4311UA/1K is specified for broadcast and mastering applications demanding lowest distortion.
Does the PGA4311UA/1K require external output buffers?
No-the PGA4311UA/1K integrates high-performance op amp output stages capable of directly driving 600Ω loads with minimal THD+N degradation. Its output voltage swing extends to within 1.25V of VA+/VA− rails (±3.75V with ±5V supplies), eliminating need for external buffers in line-level audio paths. This simplifies PCB layout and reduces BOM count.
PGA4311UA/1K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Volume Control
- Applications:
- Audio, Musical Instruments
- Number of Channels:
- 4
- Interface:
- SPI
- Voltage - Supply:
- ±4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- 31.5dB ~ -95.5dB
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
PGA4311UA/1K FAQ
1.How can I place an order for PGA4311UA/1K through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA4311UA/1K 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 PGA4311UA/1K reliable?
The price and inventory of PGA4311UA/1K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA4311UA/1K is usually 5 days.
3.What payment methods are accepted for PGA4311UA/1K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA4311UA/1K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA4311UA/1K?
PGA4311UA/1K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA4311UA/1K 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 PGA4311UA/1K?
For technical support, including PGA4311UA/1K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA4311UA/1K requirements.
6.How does Aetrix verify that PGA4311UA/1K is sourced from the original manufacturer or authorized distributors?
All PGA4311UA/1K 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 PGA4311UA/1K meets industry standards.
7.What is the process for return or replacement of PGA4311UA/1K?
All PGA4311UA/1K units undergo pre-shipment inspection (PSI). If there is an issue with PGA4311UA/1K, 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 PGA4311UA/1K part is unused and in its original packaging.
Return procedure for PGA4311UA/1K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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