My Inquiry
My Account
Texas Instruments PGA4311UA
- Part No.:
- PGA4311UA
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PGA4311UA.pdf
- Description:
- IC VOLUME CONTROL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:138
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PGA4311UA 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, and 0.0002% THD+N at 1kHz for professional mixing consoles and broadcast studio equipment.
For engineers reviewing the PGA4311UA datasheet, PGA4311UA pinout, PGA4311UA application, or PGA4311UA equivalent, this page provides verified gain range (+31.5dB to −95.5dB), zero-crossing mute timing (16ms timeout), serial interface timing (6.25MHz SCLK), A-grade dynamic range (120dB), and SOP-28 thermal limits (−40°C to +85°C) - all confirmed from TI SBOS230A.
Technical Context
The PGA4311UA implements a resistor-network-based gain control architecture with analog switch arrays and high-performance op amp output stages, enabling direct 600Ω load driving without external buffering. Its four independent channels each feature unbalanced analog I/O referenced to dedicated AGND pins and support hardware mute via active-low MUTE pin.
Serial control uses a 3-wire interface (CS/SDI/SCLK) with MSB-first 32-bit framing (8 bits per channel), daisy-chain capable, and zero crossing detection enabled by ZCEN pin. Gain transitions occur on signal zero crossings or after 16ms timeout to eliminate audible artifacts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | +31.5dB to −95.5dB in 0.5dB steps - enables precise attenuation for line-level signal routing without clipping |
| THD+N | 0.0002% at 1kHz (A-grade) - ensures transparent audio reproduction in high-fidelity studio applications |
| Dynamic Range | 120dB - supports wide signal headroom for multi-track recording and mastering workflows |
| Interchannel Crosstalk | −130dBFS - prevents bleed between channels in multi-input mixing systems |
| Supply Voltages | ±5V analog, +5V digital - requires dual-rail analog supply and separate digital rail for noise isolation |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade audio equipment deployment |
| SCLK Frequency | Up to 6.25MHz - allows fast volume updates across all four channels within <5.12µs per 32-bit word |
Pinout & Package
SOP-28 (SOIC-DW) package with 1.27mm pitch, 10.3mm × 7.5mm body, and moisture sensitivity level MSL-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MUTE | Active-low hardware mute control - disconnects outputs and terminates to 10kΩ ground to suppress clicks |
| 3,10,19,26 | AIN_1–AIN_4 | Unbalanced analog inputs - each referenced to its own AGND pair for channel isolation |
| 5,8,21,24 | AOUT_1–AOUT_4 | Buffered analog outputs - drive 600Ω loads directly; swing within 1.25V of VA+/VA− rails |
| 13 | SDI | Serial data input - accepts 32-bit command word (MSB first) for simultaneous 4-channel gain programming |
| 14 | CS | Chip select - must be held low for full 32-bit transfer; enables SDO tri-state when high |
| 15 | SCLK | Serial clock input - rising edge latches SDI; falling edge drives SDO in daisy-chain mode |
| 16 | SDO | Serial data output - tri-state when CS high; used to cascade multiple PGA4311UA devices |
| 28 | ZCEN | Zero crossing enable - HIGH activates glitch-free gain transitions synchronized to input zero crossings |
Key Features
| Feature | Design Value |
|---|---|
| Noise-free level transitions | Zero crossing detection with 16ms timeout ensures mute/gain changes produce no audible pops or clicks |
| Daisy-chain serial interface | 3-wire bus supports cascading N devices using single SDO→SDI connection - reduces host GPIO count |
| Hardware + software mute | Dual mute paths: pin-driven (MUTE) for fail-safe shutdown; register-based (0x00) for programmable silent startup |
| Direct 600Ω load drive | Integrated op amp output stage eliminates need for external buffers in line-level audio distribution |
| Channel-independent ground routing | Dedicated AGND pairs per channel minimize crosstalk and improve PSRR in mixed-signal PCB layouts |
Applications
| Broadcast Studio Mixer | Multi-Track Audio Recorder |
|---|---|
Use Scenario: Real-time fader control in analog/digital hybrid broadcast consoles with >32 input channels. IC Role / Device Role / Timing Role: 4-channel analog volume controller handling line-level program feeds with zero-crossing synchronized gain updates. Use Value: −130dBFS crosstalk and 120dB dynamic range preserve stereo imaging integrity during live mix automation. |
Use Scenario: Input gain staging for 24-track digital audio workstation (DAW) front-end with analog summing bus. IC Role / Device Role / Timing Role: Precision analog attenuator for microphone preamp outputs prior to ADC conversion. Use Value: 0.0002% THD+N ensures clean signal capture without harmonic contamination during overdub sessions. |
| Professional Effects Processor | Automotive A/V Receiver |
Use Scenario: Dynamic level balancing across reverb/delay send-return paths in rack-mounted DSP effects units. IC Role / Device Role / Timing Role: Four independent analog gain cells controlling wet/dry blend and feedback loop levels. Use Value: +31.5dB to −95.5dB range accommodates both unity-gain bypass and deep attenuation for effect tail shaping. |
Use Scenario: Source-selectable volume control in premium automotive infotainment head units supporting AM/FM, Bluetooth, and HDMI ARC. IC Role / Device Role / Timing Role: Analog volume IC managing four speaker zones (front/rear/sub/center) with independent mute capability. Use Value: −40°C to +85°C operating range and ±5V rail tolerance ensure stable performance under vehicle thermal cycling. |
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 | U-grade variant: 0.0004% THD+N (vs. 0.0002% for PGA4311UA), identical pinout, same SOP-28 package | Targeted at high-end consumer audio where 0.0002% THD+N is not required | Select PGA4311U for cost-sensitive prosumer gear with relaxed distortion specs |
| PGA4312UA | Pin-compatible upgrade: adds internal 2.5V reference, improved PSRR (110dB vs. 100dB), same gain range and interface | Required when system lacks stable external reference or needs higher power-supply noise immunity | Choose PGA4312UA when designing new platforms needing enhanced DC accuracy or noise rejection |
Compared with PGA4311U, the PGA4311UA delivers lower THD+N for critical listening environments; compared with PGA4312UA, it lacks integrated reference but offers proven stability in legacy designs with external 2.5V sources.
Availability
PGA4311UA is available at Aetrix Electronics and suitable for broadcast studio equipment, multi-track recorders, and automotive A/V receivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PGA4311UA 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 founded in 1930, specializing in analog, embedded processing, and high-reliability silicon for industrial, automotive, and communications markets.
The PGA4311UA belongs to TI's precision audio analog volume controller product line, engineered specifically for professional audio infrastructure demanding ultra-low distortion, channel isolation, and deterministic mute behavior.
FAQ
What is the exact gain resolution and total range supported by the PGA4311UA?
The PGA4311UA provides 0.5dB step resolution across a total range of +31.5dB to −95.5dB. This is achieved via an 8-bit straight-binary gain code per channel (N = 0 to 255), where N = 0 sets hardware mute and N = 255 yields maximum gain. The PGA4311UA implements this range using an internal resistor ladder and analog switch array, ensuring monotonic attenuation without dead zones.
Does the PGA4311UA require external op amps to drive standard line-level loads?
No, the PGA4311UA does not require external op amps to drive standard line-level loads. Its integrated output buffer is specified to drive 600Ω loads directly, with output voltage swing limited to within 1.25V of the ±5V analog supplies (i.e., ±3.75V). This meets typical professional line-level requirements (±2.5Vrms ≈ ±3.54Vp-p) while maintaining 0.0002% THD+N at 1kHz - a key specification confirmed for the PGA4311UA A-grade device.
How does zero crossing detection function on the PGA4311UA, and what happens if no zero crossing occurs?
Zero crossing detection on the PGA4311UA is enabled by asserting ZCEN (pin 28) HIGH. When a new gain setting is written, the device waits for the next positive-slope zero crossing on the corresponding channel's input before applying the change. If no zero crossing occurs within 16ms, the gain update proceeds unconditionally to prevent indefinite blocking. This 16ms timeout is fixed and non-adjustable, and applies independently per channel - a behavior explicitly documented in TI SBOS230A for the PGA4311UA.
Can multiple PGA4311UA devices be controlled from a single microcontroller SPI interface?
Yes, multiple PGA4311UA devices can be daisy-chained using a single 3-wire serial interface (CS/SDI/SCLK). The SDO output of one device connects to the SDI input of the next, forming a shift register chain. For N devices, the host must issue a continuous 32×N-bit stream with CS held LOW for the full duration. Each PGA4311UA consumes 32 bits (8 per channel), and the final device's SDO remains high-impedance unless further chained - a topology fully supported by the PGA4311UA's serial architecture.
What are the absolute maximum supply ratings and thermal limits for the PGA4311UA?
The PGA4311UA has absolute maximum supply ratings of +5.5V on VA+, −5.5V on VA−, and +5.5V on VD+. Exceeding these may cause permanent damage. Its guaranteed operating temperature range is −40°C to +85°C, with storage range from −65°C to +150°C and maximum junction temperature of +150°C. These limits are identical for both U- and A-grade variants and apply strictly to the PGA4311UA as specified in the SBOS230A datasheet.
PGA4311UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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 FAQ
1.How can I place an order for PGA4311UA through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA4311UA 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 reliable?
The price and inventory of PGA4311UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA4311UA is usually 5 days.
3.What payment methods are accepted for PGA4311UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA4311UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA4311UA?
PGA4311UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA4311UA 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?
For technical support, including PGA4311UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA4311UA requirements.
6.How does Aetrix verify that PGA4311UA is sourced from the original manufacturer or authorized distributors?
All PGA4311UA 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 meets industry standards.
7.What is the process for return or replacement of PGA4311UA?
All PGA4311UA units undergo pre-shipment inspection (PSI). If there is an issue with PGA4311UA, 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 part is unused and in its original packaging.
Return procedure for PGA4311UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PGA4311UA Tags
-
SA571DR2G
onsemi
-
ADAU7002ACBZ-R7
Analog Devices Inc.
-
DRV135UA/2K5
Texas Instruments
-
DRV134UA/1K
Texas Instruments
-
DRV134PA
Texas Instruments
-
DRV134UA
Texas Instruments
-
DRV135UA
Texas Instruments
-
SA572DR2G
onsemi
-
PGA2311U/1K
Texas Instruments
-
SI8244BB-D-IS1R
Skyworks Solutions Inc.
-
CS8416K-CZZR
Cirrus Logic Inc.
-
SRC4392IPFBR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
