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參數資料
| 型號： | TCM320AC46IDW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | SOIC-20 |
| 文件頁數： | 1/19頁 |
| 文件大?。?/td> | 249K |
| 代理商： | TCM320AC46IDW |
TCM320AC46
GENERALPURPOSE AUDIO INTERFACE FOR DSP
SLWS001 D4091, JUNE 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
Copyright
1993, Texas Instruments Incorporated
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Single 5-V Operation
Low Power Consumption:
Operating Mode . . . 55 mW Typ
Standby Mode ... 8 mW Typ
Power-Down Mode ...3 mW Typ
Combined ADC, DAC, and Filters
Extended Variable-Frequency Operation
Pass-Band up to 10 kHz
Electret Microphone Bias Reference
Voltage Available
Directly Drives a Piezo Speaker
Compatible With All DSPs
Selectable Between 8-Bit, -Law
Companded and 13-Bit Linear Conversion
Programmable Volume Control in Linear
Mode
Designed for Standard 2.048-MHz Master
Clock for U.S. Analog, U.S. Digital, CT2,
Battery-Powered Telephones
description
The general-purpose audio interface for digital signal processors (DSPs) is designed to perform the transmit
encoding (A/D conversion) and receive decoding (D/A conversion) together with transmit and receive filtering
for voice-band audio systems. In particular, cellular telephone systems are targeted; however, this integrated
circuit can function in several systems, including digital audio, multimedia telecommunications, noise
cancellation, and other data acquisition.
The converted data is available in two formats. The formats are pin selectable between companded and linear.
When the device is in the companded mode, data is transmitted and received in eight-bit words. When the linear
mode is selected, 13 bits of data are sent and received, padded with trailing zeros or volume control bits to
provide a 16-bit word.
The transmit section is designed to directly interface with an electret microphone element. A reference voltage
equal to VCC/2, called VMID, is used to develop the midlevel virtual ground for all the amplifier circuits and the
microphone bias circuit. A reference voltage called MICBIAS can be used to supply bias current for the
microphone. The microphone input signal (MICIN) is buffered and amplified with provision for setting the
amplifier gain to accommodate a range of signal input levels. The amplified signal is passed through antialiasing
and band-pass filters. The filtered signal is then input to a compressing analog-to-digital converter (COADC)
if companded mode is selected; otherwise, the analog-to-digital converter performs a linear conversion.
Caution. These devices have limited built-in protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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PDN
EARA
EARB
EARGS
VCC
MICMUTE
DCLKR
DIN
FSR
EARMUTE
MICBIAS
MICGS
MICIN
VMID
GND
LINSEL
TSX/DCLKX
DOUT
FSX
CLK
DW OR N PACKAGE
(TOP VIEW)
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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相關代理商/技術參數 |
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| TCM320AC54 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
| TCM320AC54CDW | 制造商:Texas Instruments 功能描述: |
| TCM320AC54CN | 制造商:Texas Instruments 功能描述: |
| TCM320AC54DW | 制造商:TI 制造商全稱:Texas Instruments 功能描述:MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
| TCM320AC54N | 制造商:TI 制造商全稱:Texas Instruments 功能描述:MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
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