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Texas Instruments PGA4311UA/1KG4
- Part No.:
- PGA4311UA/1KG4
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PGA4311UA/1KG4.pdf
- Description:
- IC VOLUME CONTROL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
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Product details
Overview
PGA4311UA/1KG4 from Texas Instruments is a high-performance, 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 at 1kHz (A-grade), and 120dB dynamic range for professional mixing consoles and broadcast studio equipment.
For engineers reviewing the PGA4311UA/1KG4 datasheet, PGA4311UA/1KG4 pinout, PGA4311UA/1KG4 application, or PGA4311UA/1KG4 equivalent, key selection criteria include zero-crossing–enabled noise-free gain transitions, daisy-chainable 3-wire serial interface (SCLK up to 6.25MHz), hardware/software mute, and A-grade THD+N performance under ±5V/5V supplies.
Technical Context
The PGA4311UA/1KG4 implements a resistor-network–based gain control architecture with analog switch arrays and integrated high-performance op amp output stages capable of directly driving 600Ω loads. Each channel operates independently with unbalanced input/output referenced to dedicated analog ground pins.
Its serial control port uses MSB-first 32-bit framing (8 bits per channel) with active-low CS, rising-edge SDI latching, falling-edge SDO output, and supports daisy-chaining across multiple devices via SDO→SDI cascading. Zero crossing detection (ZCEN pin) enables glitch-free level changes with 16ms timeout fallback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent analog volume channels with separate input/output pins |
| Gain Range | +31.5dB to −95.5dB in precise 0.5dB steps, enabling fine-grained audio level control |
| THD+N | 0.0002% at 1kHz (A-grade), ensuring ultra-low distortion in high-fidelity signal paths |
| Dynamic Range | 120dB, supporting wide-swing audio signals without quantization or noise floor limitations |
| Interchannel Crosstalk | −130dBFS at 1kHz, preventing audible leakage between stereo or multi-track channels |
| Supply Voltages | ±5V analog (VA+/VA−), +5V digital (VD+), enabling dual-supply precision and digital logic compatibility |
| Serial Interface Speed | 6.25MHz max SCLK frequency, allowing rapid reconfiguration of all four channels in <5.12µs |
Pinout & Package
SOP-28 (DW package), 300-mil body width, gull-wing leads, JEDEC MS-013 compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MUTE | Active-low hardware mute control; disconnects outputs and terminates to 10kΩ ground |
| 2,4,9,11,18,20,25,27 | AGND_x | Dedicated analog ground returns per channel (x = 1–4), minimizing ground coupling |
| 3,10,19,26 | AIN_x | Unbalanced analog input for channel x; accepts up to 2.5Vrms without clipping |
| 5,8,21,24 | AOUT_x | Unbalanced analog output for channel x; swings within 1.25V of VA+/VA− rails |
| 6,23 | VA− | Negative analog supply (−5V); dual pins reduce IR drop and improve PSRR |
| 7,22 | VA+ | Positive analog supply (+5V); dual pins reduce IR drop and improve PSRR |
| 12 | VD+ | Digital supply (+5V); isolated from analog rails to prevent digital noise injection |
| 13 | SDI | Serial data input; accepts 32-bit command word (MSB first, 8 bits per channel) |
| 14 | CS | Chip select; must be low to enable SDI sampling and SDO output |
| 15 | SCLK | Serial clock input; rising edge latches SDI, falling edge drives SDO |
| 16 | SDO | Serial data output; tri-state when CS high; enables daisy-chain configuration |
| 17 | DGND | Digital ground; separated from AGND to maintain analog integrity |
| 28 | ZCEN | Zero crossing enable (active high); activates glitch-free gain transitions per channel |
Key Features
| Feature | Design Value |
|---|---|
| Noise-free gain transitions | Zero crossing detection with 16ms timeout ensures click/pop-free volume changes in live audio systems |
| Daisy-chainable serial interface | 3-wire (CS/SCLK/SDI) + SDO allows single host controller to manage multiple PGA4311UA/1KG4 devices without address decoding |
| Hardware + software mute | Dedicated MUTE pin (hardware) and all-zero gain byte (software) provide redundant muting for safety-critical audio routing |
| Direct 600Ω drive capability | Integrated op amp output stage eliminates need for external buffering in line-level applications |
| A-grade audio performance | 0.0002% THD+N and 120dB dynamic range meet broadcast and professional studio requirements |
Applications
| Mixing Console Channel Strip | Broadcast Studio Monitor Controller |
|---|---|
Use Scenario: Precise real-time fader control across 4-channel analog summing bus with minimal crosstalk and no audible artifacts during automation moves. IC Role / Device Role / Timing Role: Primary analog volume controller per channel; zero-crossing synchronized gain updates ensure seamless level transitions during live mix changes. Use Value: −130dBFS crosstalk prevents bleed between program, monitor, and cue buses; A-grade THD+N preserves fidelity in critical monitoring paths. |
Use Scenario: Centralized analog level management for multi-source studio monitor feed (main, alt, headphones), requiring independent attenuation and mute per source. IC Role / Device Role / Timing Role: Quad-channel programmable attenuator with hardware mute override; ZCEN-enabled transitions eliminate clicks during source switching. Use Value: ±5V analog supplies support full 7.5Vpp signal swing; daisy-chained serial control simplifies integration into existing MCU-based monitor controllers. |
| Multi-Track Audio Recorder Input Stage | High-End A/V Receiver Preamp |
Use Scenario: Analog input gain staging for 4-track simultaneous recording, where channel matching and low-noise performance are essential for post-production flexibility. IC Role / Device Role / Timing Role: Precision analog gain block before ADC; matched gain error (±0.05dB) ensures consistent level capture across tracks. Use Value: 0.0002% THD+N preserves transient detail; 10kΩ input impedance minimizes loading on microphone preamp outputs. |
Use Scenario: Source-selectable volume control in premium home theater receivers handling stereo, surround, and zone 2 outputs with independent level calibration. IC Role / Device Role / Timing Role: Main analog volume IC for front left/right channels; serial interface enables remote MCU control and memory recall of user presets. Use Value: SOP-28 footprint allows compact layout; 120dB dynamic range supports high-resolution audio playback without noise floor interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel analog volume control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PGA4311U/1K | U-grade variant: 0.0004% THD+N (vs. 0.0002% in PGA4311UA/1KG4), identical pinout, specs, and package | Suitable for consumer-grade audio where ultra-low distortion is not mandatory; lower cost than A-grade | Select PGA4311U/1K when THD+N ≤ 0.0004% meets system requirements and budget constraints apply. |
| PGA4310UA | 2-channel version (vs. 4-channel); same A-grade THD+N, gain range, and serial interface; SOP-20 package | Applicable where only dual-channel control is needed-e.g., stereo preamp-reducing PCB area and BOM count | Choose PGA4310UA for stereo-only designs seeking identical A-grade performance in smaller footprint. |
Compared with PGA4311U/1K, the PGA4311UA/1KG4 delivers tighter THD+N for mission-critical audio paths; versus PGA4310UA, it doubles channel count at the cost of larger SOP-28 layout and higher pin count-ideal for multi-channel broadcast or recording infrastructure.
Availability
PGA4311UA/1KG4 is available at Aetrix Electronics and suitable for broadcast studio equipment, professional mixing consoles, and high-end A/V receivers requiring stable component supply, long-term lifecycle support, and A-grade audio performance.
Supply support for PGA4311UA/1KG4 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 expertise in high-fidelity audio signal chain components.
The PGA4311 product line was designed specifically for professional and high-end consumer audio systems requiring digitally programmable, low-distortion analog volume control with zero-crossing transition capability.
FAQ
What is the operating temperature range for the PGA4311UA/1KG4?
The PGA4311UA/1KG4 is rated for operation from −40°C to +85°C, matching the extended industrial temperature range specified for the A-grade variant. This ensures reliable performance in broadcast studios, live sound environments, and automotive audio head units where ambient temperatures fluctuate significantly. The PGA4311UA/1KG4 maintains its 0.0002% THD+N and −130dBFS crosstalk specifications across this full range.
Does the PGA4311UA/1KG4 require external output buffers?
No, the PGA4311UA/1KG4 integrates high-performance op amp output stages capable of directly driving 600Ω loads without external buffering. Its output voltage range extends to within 1.25V of the ±5V analog rails (7.5Vpp), and it delivers 50mA short-circuit current. This eliminates buffer stages in line-level applications, reducing component count and board space while preserving signal integrity in the PGA4311UA/1KG4 signal path.
How does zero crossing detection work on the PGA4311UA/1KG4?
Zero crossing detection on the PGA4311UA/1KG4 is enabled by asserting ZCEN (pin 28) HIGH. When a new gain setting is written, the device waits for a positive-slope zero crossing on the corresponding channel's input signal before applying the change-eliminating audible clicks. If no zero crossing occurs within 16ms, the update proceeds unconditionally. This behavior applies independently per channel and operates regardless of ZCEN status for hardware mute events.
Can multiple PGA4311UA/1KG4 devices be controlled with one microcontroller?
Yes-the PGA4311UA/1KG4 supports daisy-chaining via its SDO (pin 16) and SDI (pin 13) pins. Connecting SDO of one device to SDI of the next forms a 32×N-bit shift register (N = number of devices). With CS held LOW for 32×N SCLK cycles, a single 3-wire interface can configure gain settings for all devices simultaneously-enabling scalable multi-channel control without additional GPIO or address decoding logic for the PGA4311UA/1KG4 array.
What is the power-up behavior of the PGA4311UA/1KG4?
On power-up, the PGA4311UA/1KG4 enters a ~100ms hardware mute state while internal flip-flops reset and offset calibration initiates. After calibration completes, all four channels default to software mute (gain byte = 00HEX). The device remains in this silent state until the host controller writes valid gain values via the serial interface. This ensures no unintended audio output during system initialization-critical for protecting speakers and maintaining clean startup in the PGA4311UA/1KG4 signal chain.
PGA4311UA/1KG4 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/1KG4 FAQ
1.How can I place an order for PGA4311UA/1KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA4311UA/1KG4 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/1KG4 reliable?
The price and inventory of PGA4311UA/1KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA4311UA/1KG4 is usually 5 days.
3.What payment methods are accepted for PGA4311UA/1KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA4311UA/1KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA4311UA/1KG4?
PGA4311UA/1KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA4311UA/1KG4 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/1KG4?
For technical support, including PGA4311UA/1KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA4311UA/1KG4 requirements.
6.How does Aetrix verify that PGA4311UA/1KG4 is sourced from the original manufacturer or authorized distributors?
All PGA4311UA/1KG4 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/1KG4 meets industry standards.
7.What is the process for return or replacement of PGA4311UA/1KG4?
All PGA4311UA/1KG4 units undergo pre-shipment inspection (PSI). If there is an issue with PGA4311UA/1KG4, 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/1KG4 part is unused and in its original packaging.
Return procedure for PGA4311UA/1KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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