參數(shù)資料
型號(hào)： TLV320AIC20KIPFBRG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： GREEN, PLASTIC, TQFP-48
文件頁(yè)數(shù)： 16/52頁(yè)
文件大小： 981K
代理商： TLV320AIC20KIPFBRG4
www.ti.com
Analog/Digital Loopback
Analog Sidetone
Digital Sidetone
Analog Input/Output
Analog Crosspoint
Analog Input Amplifier
Microphone Bias
Output Drivers
Speaker Driver
TLV320AIC20, TLV320AIC21
TLV320AIC24, TLV320AIC25
TLV320AIC20K, TLV320AIC24K
SLAS363D – MARCH 2002 – REVISED APRIL 2005
Functional Description (continued)
The analog and digital loopbacks provide a means of testing the data ADC/DAC channels and can be used for
in-circuit system level tests. The analog loopback always has the priority to route the DAC low pass filter output
into the analog input where it is then converted by the ADC to a digital word. The digital loopback routes the ADC
output to the DAC input on the device. Analog loopback is enabled by writing a 1 to bit D2 in the control register
1. Digital loopback is enabled by writing a 1 to bit D1 in control register 1.
The analog sidetone attenuates the analog input and mixes it with the output of the DAC. The control register 5C
selects the attenuation level of the analog sidetone.
The digital sidetone attenuates the ADC output and mixes it with the input of the DAC. The control register 5C
selects the attenuation level of the digital sidetone.
To produce excellent common-mode rejection of unwanted signal performance, the analog signal is processed
differentially until it is converted to digital data. The signal source driving the analog inputs should have low
source impedance for lowest noise performance and accuracy. To obtain maximum dynamic range, the signal
must be ac coupled to the input terminal. The analog output is differential from the digital-to-analog converter.
The analog crosspoint is a lossless analog switch matrix controlled via the serial control port. It allows any source
device to be connected to any sink device. Additionally, special summing connections with adjustable loss (7 × 3
dB steps) are included to implement sidetone for the headset and handset ports. (Also included is muting
function on any of the sink devices). The control of the analog crosspoint, defined in the control register 6, is to
allow any analog input or output to connect to a codec at one time. If more than one input is selected, these
inputs are mixed together before the conversion. Caution needs to be taken to make sure that both DAC
channels are not connected to the same output.
The integrated programmable gain amplifier (PGA) controls the amplification of any analog input before the
analog-to-digital converter converts the signal. The PGA's gain from 0 dB to 42 dB in 1.5-dB steps and 48 dB
and 54 dB are selected using the control register 5A.
To operate electret microphones properly, a bias voltage and current are provided. Typically, the current drawn
by the microphone is in the order of 100 A to 800 A and the bias voltage is specified across the microphone at
1.35 V or 2.35 V. The MICBIAS has good power supply noise rejection in the audio band and the bias voltage is
selectable, via bit D3 of control register 1, for each interface.
The HSNO and HDSO are output from two audio amplifiers to drive low-voltage speakers like those in the
handset and headset. They can drive a load of 150
. The drive amplifier is differential to minimize noise and
EMC immunity problems. The frequency response is flat up to 26 kHz.
The SPKO is output from the audio amplifier that can drive an 8-
speaker load. The drive amplifier is differential
to minimize noise and EMC immunity problems. The frequency response is flat up to 26 kHz.
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TLV320AIC21C 制造商:TI 制造商全稱:Texas Instruments 功能描述:Layout and Grounding Guidelines for TLV320AIC2x
TLV320AIC21CPFB 功能描述:接口—CODEC Low Power Low IOVdd Dual Channel RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC21CPFBG4 功能描述:接口—CODEC 64 x 18 3.3-V Synch FIFO Memory RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
TLV320AIC21CPFBR 功能描述:接口—CODEC Low Power Low IOVdd Dual Channel RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
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