PCM6340QRTVRQ1 - 4-Ch Audio ADC w/ Mic Bias | TI Automotive
부품 번호: PCM6340QRTVRQ1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.1 | $71.00 |
| 100 | $6.3 | $630.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.85 | $4,850.00 |
PCM6340QRTVRQ1 개요
What is an audio ADC? An audio analog-to-digital converter is a semiconductor that samples continuous analog audio signals and converts them into a digital stream (typically PCM, TDM, or I2S) for downstream DSP, codec, or microcontroller processing. In automotive audio signal chains, audio ADCs sit between the analog microphone or line-input stage and the digital host processor; the broader hierarchy is ADC -> data converter -> mixed-signal IC -> semiconductor. The PCM6340QRTVRQ1 belongs to TI's PCM6xx0-Q1 family of automotive audio ADCs and combines the converter, microphone bias supply, and input diagnostics into one part, which simplifies BOM and PCB area versus discrete implementations.
Key features include four high-performance delta-sigma ADC channels with 16/20/24/32-bit output word lengths, support for both single-ended and differential input configurations, integrated programmable microphone bias, and input fault diagnostics (open, short, DC level). The device is controlled through I2C or SPI and outputs audio data over standard serial audio interfaces. It supports line and microphone inputs with input signals up to 10 V RMS.
Technically, the PCM6xx0-Q1 family uses a high-order delta-sigma modulator architecture with multi-bit front-end and on-chip digital decimation filtering, achieving high dynamic range and low distortion. The integrated microphone bias regulator eliminates external LDO/charge-pump circuitry, while the input diagnostics monitor each channel for open/short conditions and DC fault levels that are critical for automotive functional-safety requirements.
Typical applications include automotive head-unit audio capture, active-noise-cancellation (ANC) and road-noise-cancellation (RNC) microphone arrays, in-cabin voice and hands-free EC/NR front ends, telematics and eCall microphone inputs, and automotive infotainment line-input digitizers. Designers choose this part when they need AEC-Q100-qualified capture with on-chip mic bias and diagnostics to reduce PCB area and improve ASIL-level fault coverage.
When designing with this part, follow the datasheet's recommended decoupling scheme and place the analog and digital ground returns per the layout guidelines to meet the stated THD+N and dynamic-range numbers. Use the -enable pin and the configurable power-down modes to manage quiescent draw on accessory-rail battery lines.
This page synthesizes distributor pricing, drop-in alternatives from TI's PCM6xx0-Q1 family and competing automotive ADCs, and practical design notes not duplicated in the manufacturer datasheet.
드롭인 대체품: PCM6340QRTVRQ1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PCM6260QRTVRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PCM6360QRTVRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PCM6240QRTVRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PCM6340QRTVRQ1 최대 정격 & 전기적 특성
| Number of Channels | 4 |
| 분해능 | 16 / 20 / 24 / 32 bit |
| Sample Rate Range | 8 kHz to 768 kHz |
| Architecture | Delta-Sigma |
| Input Type | Single-ended or Differential |
| Maximum Input Signal | 10 V RMS |
| Control Interface | I2C, SPI |
| Microphone Bias | Integrated, programmable |
| Input Fault Diagnostics | Yes (open, short, DC level) |
| Automotive Qualification | AEC-Q100 |
| 동작 온도 범위 | -40C to +125C |
| 패키지 | WQFN-32 (RTV) 5x5 mm |
| 실장 유형 | Surface Mount |
PCM6340QRTVRQ1 핀 구성
| 핀 1 | INxP — Analog input positive (channel 1) |
| 핀 2 | INxN — Analog input negative (channel 1) |
| 핀 3 | INxP — Analog input positive (channel 2) |
| 핀 4 | INxN — Analog input negative (channel 2) |
| 핀 5 | INxP — Analog input positive (channel 3) |
| 핀 6 | INxN — Analog input negative (channel 3) |
| 핀 7 | INxP — Analog input positive (channel 4) |
| 핀 8 | INxN — Analog input negative (channel 4) |
| 핀 9 | MICBIAS — Microphone bias output |
| 핀 10 | AVDD — Analog supply |
| 핀 11 | AVSS — Analog ground |
| 핀 12 | DVDD — Digital supply |
| 핀 13 | DGND — Digital ground |
| 핀 14 | IOVDD — Digital I/O supply |
| 핀 15 | GPO — General-purpose output / interrupt |
| 핀 16 | SCL/MCK — I2C clock / SPI clock |
| 핀 17 | SDA/MISO — I2C data / SPI MISO |
| 핀 18 | AD/MOSI — I2C address / SPI MOSI |
| 핀 19 | CS — SPI chip select |
| 핀 20 | BCLK — Audio serial bit clock |
| 핀 21 | FSYNC — Audio serial frame sync (LRCK) |
| 핀 22 | DOUT — Audio data output |
| 핀 23 | DIN — Audio data input (for daisy-chain) |
| 핀 24 | GPI1 — General-purpose input 1 |
| 핀 25 | GPI2 — General-purpose input 2 |
| 핀 26 | PD — Power-down control |
| 핀 27 | RESET — Hardware reset (active low) |
| 핀 28 | TEST — Factory test pin (tie low or float per datasheet) |
| 핀 29 | NC — Not connected (per datasheet) |
| 핀 30 | NC — Not connected (per datasheet) |
| 핀 31 | NC — Not connected (per datasheet) |
| 핀 32 | EP — Exposed thermal pad - tie to analog ground |
일반적인 애플리케이션
PCM6340QRTVRQ1 적합 용도: 6 애플리케이션s: Automotive Head-Unit Audio Capture, Active Noise Cancellation (ANC) / Road Noise Cancellation (RNC) Mic Arrays, In-Cabin Voice / Hands-Free EC & NR, Telematics and eCall Microphone Input, Automotive Infotainment Line-Input Digitizer, ADAS Acoustic Sensing / Siren Detection.
Automotive Head-Unit Audio Capture
The PCM6340QRTVRQ1 digitizes up to 4 microphone or line-level inputs inside an automotive head unit with AEC-Q100 reliability. Its integrated microphone bias eliminates the external LDO or charge pump that head-unit designs otherwise need for analog MEMS or electret capsules, and its 10 V RMS differential input range handles the dynamic range required for in-cabin voice and music capture. The 8 kHz-to-768 kHz sample-rate range supports narrowband EC/NR for hands-free calling, wideband telephony for premium voice, and full-bandwidth capture for ADAS road-noise cancellation without changing ADC hardware. Input fault diagnostics detect microphone shorts, opens, and DC excursions, which is essential for ISO 26262 functional-safety goals in the head-unit platform.
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Active Noise Cancellation (ANC) / Road Noise Cancellation (RNC) Mic Arrays
The PCM6340QRTVRQ1 captures 4 channels of in-cabin microphone audio at up to 768 kHz for ANC and RNC algorithms that require full audio bandwidth and tight phase matching across channels. The integrated microphone bias and per-channel fault diagnostics simplify the BOM for 4-mic arrays mounted in the headliner or headrests, while the delta-sigma architecture's high dynamic range preserves the low-amplitude road-noise content that RNC algorithms use to generate anti-noise. The WQFN-32 (RTV) 5x5 mm package fits the dense PCBs of compact ANC modules placed near the microphone cluster, and AEC-Q100 qualification is required because these modules operate in passenger-compartment temperature extremes during summer sun load.
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In-Cabin Voice / Hands-Free EC & NR
The PCM6340QRTVRQ1 serves as the analog front end for hands-free, full-duplex, and voice-command systems by digitizing the far-field microphone that the cabin DSP uses for echo cancellation and beamforming. Its support for both single-ended and differential input lets the same BOM drive flex the analog mic PCB variants used across vehicle programs, and its 32-bit output word length preserves headroom for the long echo-canceller FIR tails required for high-quality hands-free calling. The on-chip microphone bias regulator keeps the analog path supply noise low, which directly improves the signal-to-noise ratio that the EC/NR algorithm sees, and the I2C/SPI control interface allows the head-unit MCU to reprogram mic-bias and channel gain over the vehicle's diagnostic bus.
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Telematics and eCall Microphone Input
The PCM6340QRTVRQ1 digitizes the dedicated eCall microphone that automotive telematics control units (TCUs) use to capture the occupant's voice during an emergency call. Its AEC-Q100 qualification and -40C to +125C operating range are mandatory for TCU hardware that must survive under-dash thermal stress, and its integrated microphone bias removes the external regulator that legacy eCall modules required. The 16/20/24/32-bit output word-length flexibility allows the eCall modem firmware to trade audio fidelity for bandwidth on narrowband cellular bearers, while the input fault diagnostics verify that the eCall microphone is functional before the call is placed - a regulatory requirement in many jurisdictions.
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Automotive Infotainment Line-Input Digitizer
The PCM6340QRTVRQ1 digitizes external audio sources such as auxiliary line inputs, USB-audio dongles, or rear-seat entertainment feeds inside an automotive infotainment head unit. Its 10 V RMS differential input range accepts the full line-level swing delivered by portable HDMI sources without an external attenuator, and its I2C/SPI control interface allows the infotainment SoC to switch sample rates on the fly as the source content changes. The integrated delta-sigma modulator and digital decimation filter deliver the dynamic range required to preserve music fidelity across the -40C to +125C automotive temperature range, while the WQFN-32 (RTV) 5x5 mm package fits the dense main board of a modern infotainment SoC platform.
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ADAS Acoustic Sensing / Siren Detection
The PCM6340QRTVRQ1 captures external microphone audio in ADAS acoustic-sensing modules that detect emergency-vehicle sirens, vehicle approach, or road-condition sounds. Its wide sample-rate range up to 768 kHz preserves ultrasonic content above 20 kHz used by some siren-detection algorithms, and its 4-channel input allows microphone arrays that beamform toward approaching sirens while nulling cabin and tire noise. AEC-Q100 qualification and the -40C to +125C automotive temperature rating are required because these modules are typically mounted behind the front grille or bumper where ambient temperatures swing dramatically. The integrated microphone bias and input fault diagnostics also meet the ISO 26262 functional-safety requirements that ADAS sensor modules must satisfy.
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추천 제품 요약
엔지니어링 참조 데이터: PCM6340QRTVRQ1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PCM6260QRTVRQ1 | PCM6360QRTVRQ1 | PCM6240QRTVRQ1 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | WQFN-32 (RTV) 5x5 mm | WQFN-32 (RTV) 5x5 mm - same | WQFN-32 (RTV) 5x5 mm - same | WQFN-32 (RTV) 5x5 mm - same |
| Number of Channels | 4 | 6 (+50%) | 6 (+50%) | 2 (-50%) |
| Resolution | 16 / 20 / 24 / 32 bit | 16 / 20 / 24 / 32 bit - same | 16 / 20 / 24 / 32 bit - same | 16 / 20 / 24 / 32 bit - same |
| Sample Rate Range | 8 kHz to 768 kHz | 8 kHz to 768 kHz - same | 8 kHz to 768 kHz - same | 8 kHz to 768 kHz - same |
| Input Signal Range | Up to 10 V RMS | Up to 10 V RMS - same | Up to 10 V RMS - same | Up to 10 V RMS - same |
| Automotive Qualification | AEC-Q100 | AEC-Q100 - same | AEC-Q100 - same | AEC-Q100 - same |
| Microphone Bias | Integrated, programmable | Integrated, programmable - same | Integrated, programmable - same | Integrated, programmable - same |
주요 차별점
- Integrated microphone bias and input fault diagnostics in one IC (vs PCM6260QRTVRQ1 / PCM6240QRTVRQ1)
- 4 channels in WQFN-32 with 10 V RMS input range (vs PCM6360QRTVRQ1 (6 channels, same WQFN-32 package))
- AEC-Q100 qualified with -40C to +125C operating range (vs Non-automotive TLV320ADCx100 parts)
설계 노트
Estimated: PCM6340QRTVRQ1 supply current is dominated by the analog front end and the microphone bias regulator; the datasheet's recommended decoupling is a 10 uF bulk plus a 0.1 uF ceramic close to each AVDD/DVDD/IOVDD pin. Place the MICBIAS bypass capacitor (datasheet-specified value) within 2 mm of the MICBIAS pin to keep the bias rail noise low - this directly affects SNR of the captured audio.
Route the analog microphone traces as differential pairs with 50 ohm characteristic impedance and keep them away from digital switching nodes (SPI, BCLK, FSYNC). Use a separate analog ground island that joins the EP pad ground at a single point under the IC, and flood the unused PCB area on the analog layer to shield the input traces from digital coupling.
Do not float the unused NC pins or the TEST pin - tie them per datasheet recommendations to avoid leakage paths that can corrupt the microphone-bias fault comparator. Verify the I2C address strap (AD pin) before bringing up I2C traffic, since a wrong strap will lock the host out of register access and mask the input fault diagnostics. Always enable the on-chip diagnostics and read the fault status in your startup routine for ISO 26262 functional-safety coverage.
Estimated: at full 4-channel operation with the mic bias regulator delivering maximum load, the WQFN-32 (RTV) package dissipates well under 1 W and theta_JA is sufficient for the automotive -40C to +125C range with normal PCB copper. For under-dash mounting with reduced airflow, flood the EP pad with thermal vias to the inner ground plane to keep junction rise within margin during summer sun load.
규정 준수 정보
AEC-Q100 qualified per TI automotive product family designation (-Q1 suffix). RoHS and REACH compliance per TI product page. Halogen-free and lead-free per TI packaging materials disclosure.
