TLV320ADC6120 是一款高性能 Burr-Brown™ 音频模数转换器 (ADC),最多可支持对脉冲密度调制 (PDM) 麦克风输入的两个模拟通道或四个数字通道进行同步采样。该器件支持线路和麦克风输入,并允许单端和差分输入配置。该器件集成了可编程通道增益、数字音量控制、可编程麦克风偏置电压、锁相环 (PLL)、可编程高通滤波器 (HPF)、双二阶滤波器、低延迟滤波器模式,并可实现高达 768kHz 的采样率,并可实现高达 192kHz 的采样率。该器件支持时分多路复用 (TDM)、I2S 或左平衡 (LJ) 音频格式,并可通过 I2C 接口进行控制。这些集成的高性能特性,以及采用 3.3V 或 1.8 V 单电源供电的功能,使该器件非常适用于远场麦克风录音应用中空间受限的音频系统。
TLV320ADC6120 的额定工作温度范围为 –40°C 至 +125°C,并且采用 20 引脚 WQFN 封装。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
TLV320ADC6120 | WQFN (20) | 3.00mm × 3.00mm,间距为 0.5mm |
Changes from Revision * (December 2020) to Revision A (June 2021)
FEATURE | PCM1821 | PCM1820 | TLV320ADC3120 | TLV320ADC5120 | TLV320ADC6120 |
---|---|---|---|---|---|
Control interface | Pin control | I2C | |||
Digital audio serial interface | TDM or I2S | TDM or I2S or left-justified (LJ) | |||
Audio analog channel | 2 | 2 | 2 | 2 | 2 |
Digital microphone channel | Not available (N/A) | Not available (N/A) | 4 | 4 | 4 |
Programmable MICBIAS voltage | Not available (N/A) | Not available (N/A) | Yes | Yes | Yes |
Dynamic range (DRE disabled) | 106 dB | 113 dB | 106 dB | 108 dB | 113 dB |
Dynamic range (DRE enabled) | Not available (N/A) | 123 dB | Not available (N/A) | 120 dB | 123 dB |
ADC SNR with DRE | Not available (N/A) | 123 dB | Not available (N/A) | 120 dB | 123 dB |
Input impedance | 10 kΩ | 2.5 kΩ | 2.5 kΩ, 10 kΩ, 20 kΩ | ||
Compatibility | Pin-to-pin, package, drop-in replacements of each other | Pin-to-pin, package, and control registers compatible; drop-in replacements of each other | |||
Package | WQFN (RTE), 20-pin, 3.00 mm × 3.00 mm (0.5-mm pitch) |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | IN1P | Analog input | Analog input 1P pin. |
2 | IN1M | Analog input | Analog input 1M pin. |
3 | IN2P_GPI1 | Analog input/digital input | Analog input 2P pin or general-purpose digital input 1 (multipurpose functions such as digital microphones data, PLL input clock source, and so forth). |
4 | IN2M_GPO1 | Analog input/digital output | Analog input 2M pin or general-purpose digital output 1 (multipurpose functions such as digital microphone clock, interrupt, and so forth). |
5 | VSS | Ground supply | Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions. |
6 | SDOUT | Digital output | Audio serial data interface bus output. |
7 | BCLK | Digital I/O | Audio serial data interface bus bit clock. |
8 | FSYNC | Digital I/O | Audio serial data interface bus frame synchronization signal. |
9 | IOVDD | Digital supply | Digital I/O power supply (1.8 V or 3.3 V, nominal). |
10 | VSS | Ground supply | Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions. |
11 | GPIO1 | Digital I/O | General-purpose digital input/output 1 (multipurpose functions such as digital microphones clock or data, PLL input clock source, interrupt, and so forth). |
12 | SDA | Digital I/O | Data pin for I2C control bus. |
13 | SCL | Digital input | Clock pin for I2C control bus. |
14 | DREG | Digital supply | Digital regulator output voltage for digital core supply (1.5 V, nominal). Connect a 10-µF and 0.1-µF low ESR capacitor in parallel to device ground (VSS). |
15 | VSS | Ground supply | Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions. |
16 | AVDD | Analog supply | Analog power (1.8 V or 3.3 V, nominal). |
17 | AREG | Analog supply | Analog on-chip regulator output voltage for analog supply (1.8 V, nominal) or external analog power (1.8 V, nominal). Connect a 10-µF and 0.1-µF low ESR capacitor in parallel to analog ground (AVSS). |
18 | VREF | Analog | Analog reference voltage filter output. Connect a 1-µF capacitor to analog ground (AVSS). |
19 | MICBIAS_GPI2 | Analog output/digital input | MICBIAS output or general-purpose digital input 2 (multipurpose functions such as digital microphones data, PLL input clock source, and so forth). If used as MICBIAS output, then connect a 1-µF capacitor to analog ground (AVSS). |
20 | VSS | Ground supply | Device ground internally shorted to thermal pad. Short this package corner pin directly to the board ground plane. See the package drawings at the end of this document for corner pin dimensions. |
Thermal Pad | Thermal Pad (VSS) | Ground supply | Thermal pad shorted to internal device ground. Short the thermal pad directly to the board ground plane. |