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Texas Instruments AIC111RHB
- Part No.:
- AIC111RHB
- Manufacturer:
- Texas Instruments
- Category:
- CODECS
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AIC111RHB.pdf
- Description:
- IC AUDIO CODEC 16B 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
AIC111RHB from Texas Instruments is a 1.3-V microPower™ single-channel voice-band audio codec featuring noise-shaped delta-sigma ADC and DAC, 32-pin QFN (5×5 mm) package, 40-kHz sampling rate, and integrated H-bridge speaker driver for hearing instruments and low-power medical audio systems.
For engineers reviewing the AIC111RHB datasheet, AIC111RHB pinout, AIC111RHB application, or AIC111RHB equivalent, this page delivers verified technical context, confirmed pin functions, real-world use cases in personal medical devices, and validated alternative options for low-voltage audio interface design.
Technical Context
The AIC111RHB integrates a programmable gain amplifier/compressor (PGAC) with dual-rate AGC, a 14-bit-equivalent delta-sigma ADC (87-dB DR, 73-dB THD), and a multi-bit delta-sigma DAC driving an H-bridge output stage. It supports both McBSP (TI TMS320VC54x/VC55x) and SPI (MSP430xx) digital interfaces via IMODE pin selection.
Its low-noise analog front end includes 2.4-µVrms input-referred noise, 55-dB PSRR (100 Hz–10 kHz), and regulated microphone bias (0.94 V typ, 29.1 kΩ). The on-chip oscillator generates a 5-MHz MCLK output with 150-ps RMS jitter and powers internal clock domains including the 1.28-MHz master clock for ADC/DAC operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.3 V typical; operates down to 1.1 V, enabling direct zinc-air battery use without regulation. |
| Supply Current | 350 µA typical at 1.3 V; enables multi-week operation in hearing instrument form factors. |
| ADC Dynamic Range | 87 dB at 40-kHz output rate; supports high-fidelity aural preprocessing with minimal quantization noise. |
| DAC Output Noise | 12 µVrms (adaptive Q mode); ensures clean differential H-bridge drive for low-THD speaker output. |
| H-Bridge Output | Differential ±HB_VDD swing; supports direct connection to balanced receivers without external coupling capacitors. |
| Digital Interface | Configurable McBSP or SPI via IMODE pin; 20-bit DAC input / 16-bit ADC output data format. |
| Microphone Bias | 0.94 V ±0.07 V at 20 µA; provides stable, low-noise bias for electret condenser microphones. |
Pinout & Package
Package: 32-pin QFN (5 mm × 5 mm), wettable flank, RoHS-compliant, thermal pad exposed on bottom.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVINP / AVINM | Differential analog input | Accepts AC-coupled microphone signal; forms front-end of PGA/compressor path with 20-kΩinput impedance. |
| VOUT_P / VOUT_M | Differential H-bridge output | Drives balanced receiver load directly; full-scale swing = 3/4 × HB_VDD in fixed-Q mode. |
| MIC_BIAS / MIC_VSUP | Microphone bias source | Provides 29.1-kΩcurrent-limiting resistor and 0.94-V regulated voltage for external preamp stage. |
| SCLK / FRAME / SDIN / SDOUT | Digital interface I/O | Supports McBSP or SPI protocol; SCLK = 1.28 MHz, FRAME = 40 kHz sync pulse; bidirectional data flow. |
| IMODE | Interface mode select | LOW = McBSP (TMS320VC54x), HIGH = SPI (MSP430xx); determines register map and frame timing behavior. |
| RST/LBM | Reset & low-battery monitor | Open-drain output asserts when AVDD falls below 1.05 V nontransiently; disables H-bridge automatically. |
| EXT_RST/PWDN | Power-down control | Active-low input shuts down all analog blocks and holds digital outputs in high-impedance state. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 1.3-V nominal supply with functional range 1.1–1.5 V; eliminates need for LDO in battery-powered hearing aids. |
| Integrated H-bridge driver | Differential output with adaptive/fix Q modes; eliminates external amplifier and coupling capacitors. |
| Programmable PGAC | Four AGC modes (dual/single-rate auto, fixed immediate); configurable attack/decay via FASTARREG register. |
| On-chip oscillator | Generates precise 5-MHz MCLK with 150-ps jitter; supplies clocks for ADC, DAC, and digital interface. |
| Power-on reset & battery monitor | Asserts RST/LBM at AVDD < 1.05 V for ≥44 µs; prevents audible pop and ensures graceful shutdown. |
Applications
| Hearing Instruments | Personal Medical Devices |
|---|---|
Use Scenario: Miniature in-the-ear (ITE) hearing aid processing speech signals in noisy environments. IC Role / Device Role / Timing Role: Audio codec performing front-end amplification, compression, ADC conversion, DSP interfacing, and direct H-bridge speaker drive. Use Value: 350-µA supply current and 1.3-V operation enable >100-hour runtime on zinc-air batteries; 87-dB ADC dynamic range preserves speech intelligibility. |
Use Scenario: Portable tinnitus masker delivering calibrated sound therapy via earpiece transducer. IC Role / Device Role / Timing Role: Low-noise analog interface generating precise therapeutic waveforms with adaptive gain control. Use Value: 2.4-µVrms input-referred noise and programmable HPF (50/100 Hz/bypass) ensure clean signal acquisition and artifact-free output. |
| Hearing Protection | Low-Power Headsets |
Use Scenario: Active noise-canceling (ANC) earplug suppressing hazardous industrial noise while preserving speech awareness. IC Role / Device Role / Timing Role: Dual-path audio processor handling reference mic input, error mic input, and speaker output with real-time latency control. Use Value: Independent AVINP/AVINM inputs support differential reference/error sensing; 40-kHz sampling enables wideband ANC up to 10 kHz. |
Use Scenario: Bluetooth headset companion IC handling microphone input and speaker output with ultra-low standby power. IC Role / Device Role / Timing Role: Voice-band codec bridging Bluetooth SoC's digital audio interface to analog transducers. Use Value: McBSP/SPI compatibility simplifies integration with TI CC256x or MSP430F5xx; EXT_RST/PWDN enables sub-µA system sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel voice-band audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV320AIC3104 | Higher supply (1.8–3.6 V), 24-bit stereo codec, integrated LDO, no H-bridge; requires external amplifier. | Targets portable media players and smart headsets requiring higher SNR and stereo capability. | Choose when system uses Li-ion battery and needs stereo I²S interface; not suitable for 1.3-V zinc-air operation. |
| PCM3060 | 24-bit stereo codec, 3.3-V operation, external crystal required, no integrated mic bias or H-bridge. | Designed for professional audio interfaces and USB DACs where precision and flexibility outweigh size/power constraints. | Prefer for designs needing 110-dB DR and 192-kHz sampling; lacks AIC111RHB's ultra-low-voltage autonomy and integrated drive. |
Compared with TLV320AIC3104 and PCM3060, the AIC111RHB uniquely combines 1.3-V operation, integrated H-bridge, and zinc-air battery monitoring-making it irreplaceable for miniaturized, single-cell medical audio endpoints where every µA and mm² matters.
Availability
AIC111RHB is available at Aetrix Electronics and suitable for hearing instruments, personal medical devices, and low-power headsets requiring stable component supply, long-lifecycle assurance, and traceable sourcing for Class II medical electronics.
Supply support for AIC111RHB 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 over 50 years of innovation in precision analog ICs.
The AIC111RHB belongs to TI's µPower audio codec family, engineered specifically for ultra-low-voltage, battery-constrained personal medical and hearing health applications demanding high dynamic range and autonomous power management.
FAQ
What is the minimum operating voltage for the AIC111RHB?
The AIC111RHB operates down to 1.1 V on AVDD and DVDD, with guaranteed functionality at 1.3 V typical. Below 1.1 V, analog performance degrades and the power-on reset disables the H-bridge output. This 1.1-V threshold aligns with end-of-life detection for zinc-air batteries used in hearing instruments, ensuring safe shutdown before audible distortion occurs. The AIC111RHB maintains full specification compliance across its 1.1–1.5 V range.
Does the AIC111RHB support both McBSP and SPI interfaces simultaneously?
No, the AIC111RHB supports only one digital interface protocol at a time, selected by the IMODE pin: LOW configures McBSP (TI TMS320VC54x/VC55x), HIGH configures SPI (TI MSP430xx). The interface is hardwired at power-up and cannot be dynamically reconfigured. Both protocols share the same SCLK, FRAME, SDIN, and SDOUT pins but differ in framing, register addressing, and control word structure. The AIC111RHB does not multiplex or arbitrate between them.
What is the function of the RST/LBM pin on the AIC111RHB?
The RST/LBM pin is an open-drain output that asserts low when the internal power-on reset detects AVDD falling below 1.05 V for ≥44 µs-a nontransient condition indicating battery depletion. It simultaneously gates the H-bridge output to prevent audible pop and disables DAC modulation. Unlike a standard reset, RST/LBM remains active until AVDD recovers above 1.1 V and t(VDD)_valid (100 ms) elapses. The AIC111RHB uses this signal for system-level battery management without external supervision.
Can the AIC111RHB drive a standard 8-Ω speaker directly?
No, the AIC111RHB's H-bridge is optimized for balanced, high-impedance receivers (e.g., 16–64 Ω hearing aid receivers), not standard 8-Ω speakers. Its differential output delivers up to 3/4 × HB_VDD swing into complex loads, with output resistance of 20 or 40 Ω depending on Q-mode. Driving an 8-Ω load would exceed thermal limits, distort output, and violate absolute maximum ratings. For 8-Ω applications, an external Class D or AB amplifier must be used-AIC111RHB serves only as the signal source and DAC.
How does the PGAC in the AIC111RHB handle automatic gain control?
The AIC111RHB's PGAC implements discrete AGC using peak detection with programmable attack/decay rates. In automatic dual-rate mode (default), it employs two independent counters: a fast counter for transient bursts and a slow counter for average level tracking. Gain is set to the lower of the two counters, enabling rapid response to loud sounds while avoiding overreaction to background noise. Attack/release times are configured via FASTARREG, and thresholds (400-mV peak for attack, 283-mV for release) are fixed. The AIC111RHB supports four distinct PGAC modes selectable via PDCREG bits 3–2.
AIC111RHB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Voice-Band
- Data Interface:
- Serial
- Resolution (Bits):
- 16 b
- Number of ADCs / DACs:
- 1 / 1
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- 1.1V ~ 1.5V
- Voltage - Supply, Digital:
- 1.1V ~ 1.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
AIC111RHB FAQ
1.How can I place an order for AIC111RHB through Aetrix?
Please submit a Request for Quotation (RFQ) for AIC111RHB 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 AIC111RHB reliable?
The price and inventory of AIC111RHB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AIC111RHB is usually 5 days.
3.What payment methods are accepted for AIC111RHB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AIC111RHB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AIC111RHB?
AIC111RHB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AIC111RHB 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 AIC111RHB?
For technical support, including AIC111RHB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AIC111RHB requirements.
6.How does Aetrix verify that AIC111RHB is sourced from the original manufacturer or authorized distributors?
All AIC111RHB 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 AIC111RHB meets industry standards.
7.What is the process for return or replacement of AIC111RHB?
All AIC111RHB units undergo pre-shipment inspection (PSI). If there is an issue with AIC111RHB, 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 AIC111RHB part is unused and in its original packaging.
Return procedure for AIC111RHB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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