TLV320AC37CN - 3V Voice-Band Audio Processor | Texas Instruments
Référence : TLV320AC37CN ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.95 | $1,95 |
| 10 | $1.75 | $17,50 |
| 100 | $1.55 | $155,00 |
| 500 | $1.35 | $675,00 |
| 1 000 | $1.15 | $1 150,00 |
TLV320AC37CN Présentation
A voice-band audio processor (VBAP) is a specialized mixed-signal IC that combines analog-to-digital and digital-to-analog conversion with filtering and signal processing optimized for the 300 Hz to 3.4 kHz voice band. It sits within the broader category of audio codecs, which are essential in telephony, intercoms, and voice-controlled systems. The TLV320AC37CN specifically targets low-power, battery-operated voice applications, offering a complete analog front-end and codec in a single package.
Key features include a low operating power of 20 mW typical, standby mode at 5 mW, and power-down mode at 2 mW. The device supports extended variable-frequency operation with sample rates up to 16 kHz and a pass-band to 7.2 kHz. It includes an electret microphone interface, making it ideal for direct connection to electret condenser microphones. The combined A/D, D/A, and filters simplify system design by reducing external components.
Technically, the TLV320AC37CN employs a CMOS process and operates from a single 3-V supply, which is critical for portable and battery-powered equipment. The device features a PCM codec interface with A-law companding, suitable for digital telephony standards. The through-hole PDIP-20 package ensures easy prototyping and manual assembly, though it limits high-density applications compared to surface-mount alternatives.
Typical applications include digital telephone answering machines, speakerphones, intercom systems, and voice recorders. The low power consumption and 3-V operation make it particularly suited for battery-powered devices where efficiency is paramount. The integrated filters and codec reduce BOM cost and board space.
When designing with this device, ensure proper decoupling of the 3-V supply and careful layout of the analog and digital sections to minimize noise coupling. The device is now obsolete, so consider pin-compatible alternatives for new designs.
Alternatives de remplacement direct pour TLV320AC37CN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesTLV320AC37CN Valeurs maximales et caractéristiques électriques
| Tension d'alimentation | 3 V (single) |
| Operating Power | 20 mW (typ) |
| Standby Power | 5 mW (typ) |
| Power-Down Power | 2 mW (typ) |
| Sample Rate | Up to 16 kHz |
| Pass-Band | Up to 7.2 kHz |
| Boîtier | PDIP-20 (0.300, 7.62mm) |
| Terminal Form | Through-Hole |
| Number of Terminals | 20 |
| Package Code | DIP |
| Temperature Grade | Commercial |
| Fonction | PCM Codec, A-Law, 1-Func, CMOS |
| Technology | CMOS |
| Type de montage | Through-Hole |
Configuration des broches de TLV320AC37CN
| Broche 1 | VCC — Power supply (3V) |
| Broche 2 | GND — Ground |
| Broche 3 | MICIN — Microphone input |
| Broche 4 | MICBIAS — Microphone bias voltage |
| Broche 5 | AIN — Analog input |
| Broche 6 | AOUT — Analog output |
| Broche 7 | DOUT — Digital data output |
| Broche 8 | DIN — Digital data input |
| Broche 9 | BCLK — Bit clock |
| Broche 10 | FS — Frame sync |
| Broche 11 | MCLK — Master clock |
| Broche 12 | PDN — Power down control |
| Broche 13 | STBY — Standby control |
| Broche 14 | NC — No connect |
| Broche 15 | NC — No connect |
| Broche 16 | NC — No connect |
| Broche 17 | NC — No connect |
| Broche 18 | NC — No connect |
| Broche 19 | NC — No connect |
| Broche 20 | VCC — Power supply (3V) |
Applications typiques
TLV320AC37CN convient pour 6 applications: Digital Telephone Answering Machine, Speakerphone, Intercom System, Voice Recorder, Telecommunication Equipment, Battery-Powered Audio Device.
Digital Telephone Answering Machine
The TLV320AC37CN provides voice-band A/D and D/A conversion with integrated filters, enabling digital recording and playback of voice messages. Its low power consumption (20 mW) is ideal for continuous operation in answering machines. The 3-V supply allows direct battery operation, and the PCM interface connects easily to a digital controller. The pass-band up to 7.2 kHz ensures clear voice reproduction, while the standby mode reduces power when idle.
Recommandé
Speakerphone
In speakerphone systems, the TLV320AC37CN handles voice-band audio processing, converting analog microphone signals to digital and back. Its integrated filters reduce external component count, simplifying design. The low power consumption is beneficial for desktop and portable speakerphones. The device supports sample rates up to 16 kHz, sufficient for voice, and the A-law companding matches telephony standards. The through-hole PDIP package aids in prototyping.
Recommandé
Intercom System
The TLV320AC37CN is well-suited for intercom systems, providing full-duplex voice processing with its combined A/D and D/A converters. Its 3-V operation allows battery-powered intercoms, and the low power modes extend battery life. The device's voice-band filtering improves intelligibility in noisy environments. The PCM interface enables easy connection to a central control unit. The PDIP-20 package is convenient for through-hole PCB assembly.
Recommandé
Voice Recorder
For voice recorders, the TLV320AC37CN offers low-power voice-band conversion, enabling long recording times on battery power. Its integrated filters and A/D converter capture voice signals efficiently. The device supports sample rates up to 16 kHz, adequate for voice, and the power-down mode conserves energy when not recording. The through-hole package is suitable for compact designs with proper layout. The PCM output can be stored in external memory.
Recommandé
Telecommunication Equipment
The TLV320AC37CN is designed for telecommunication applications, providing a complete voice-band codec with A-law companding. Its 3-V operation is compatible with modern telecom power rails, and the low power consumption reduces heat in dense equipment. The device's filters meet voice-band requirements, and the PCM interface integrates with digital switching systems. The PDIP-20 package is easy to handle in legacy designs.
Recommandé
Battery-Powered Audio Device
The TLV320AC37CN's low power consumption (20 mW operating, 2 mW power-down) makes it ideal for battery-powered audio devices. Its single 3-V supply can be directly powered by two AA batteries or a Li-ion cell. The integrated filters and codec reduce external components, saving space and power. The device supports voice-band audio, suitable for portable voice assistants or recorders. The through-hole package is acceptable for low-profile designs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TLV320AC37CN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TLV320AIC3110IRHBT | TLV320AIC23B | PCM2705C |
|---|---|---|---|---|
| Package | PDIP-20 | QFN-32 | TQFP-28 | TSSOP-28 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage | 3 V | 1.8V - 3.6V | 2.7V - 3.6V | 3.3V |
| Power Consumption | 20 mW (typ) | 14 mW (typ) | 23 mW (typ) | 50 mW (typ) |
| Sample Rate | Up to 16 kHz | Up to 96 kHz | Up to 96 kHz | Up to 48 kHz |
| Interface | PCM (A-law) | I2S, PCM | I2S, SPI | USB |
| Mounting Type | Through-Hole | Surface Mount | Surface Mount | Surface Mount |
| Lifecycle | Obsolete | Active | Active | Active |
Principaux différenciateurs
- Low power consumption (vs PCM2705C)
- Through-hole package (vs TLV320AIC3110IRHBT)
- Voice-band optimized (vs TLV320AIC23B)
Notes de conception
The TLV320AC37CN operates from a single 3-V supply. Ensure a clean, regulated 3-V supply with adequate decoupling capacitors (e.g., 0.1uF and 10uF) close to the VCC pins. The low power consumption (20 mW) allows simple power supply design, but avoid excessive ripple to maintain audio quality.
For through-hole PDIP-20, use a PCB with proper pad sizes and spacing. Keep analog and digital ground planes separate and connect at a single point to minimize noise. Place the device away from high-frequency digital circuits to reduce interference. Use short traces for analog signals.
The TLV320AC37CN is obsolete, so verify availability before designing it into a new product. Also, ensure the microphone input is properly biased and the electret microphone is connected correctly. Avoid exceeding the 3-V supply voltage to prevent damage.
Informations de conformité
Compliance information not provided in the verified data. The part is obsolete, so compliance may not be guaranteed.
