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參數資料
| 型號： | TLV320DAC32IRHBR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, DAC WITH PROGRAMMABLE PLL, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 28/69頁 |
| 文件大小： | 1242K |
| 代理商： | TLV320DAC32IRHBR |
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SHORT CIRCUIT OUTPUT PROTECTION
JACK / HEADSET DETECTION
SLAS506B – NOVEMBER 2006 – REVISED DECEMBER 2008........................................................................................................................................ www.ti.com
The device includes a further option that falls between the other two – while it requires less power drawn while
the output drivers are in power down, it also takes a slightly longer delay to power-up without artifact than if the
bandgap reference is kept powered up. In this alternate mode, the powered-down output driver pin is weakly
driven to a voltage of approximately half the DRVDD1/2 supply level using an internal voltage divider. This
voltage will not match the actual VCM of a fully powered driver, but due to the output voltage being close to its
final value, a much shorter power-up delay time setting can be used and still avoid any audible output artifacts.
These output voltage options are controlled in Page-0/Reg-42.
The high power output drivers can also be programmed at power up with the output level control in a highly
attenuated state, and when UN-Muted, the output driver will automatically slowly increase the gain to reach the
desired output level setting that was programmed prior to the Un-Mute setting. This capability is disabled by
default setting but can be enabled in Page-0/Reg-40.
The TLV320DAC32 includes programmable short-circuit protection for the high power output drivers, for
maximum flexibility in a given application. By default, if these output drivers are shorted, they will automatically
limit the maximum amount of current that can be sourced to or sunk from a load, thereby protecting the device
from an over-current condition. In this mode, the user can read Page-0/Reg-95 to determine whether the part is
in short-circuit protection or not, and then decide whether to program the device to power down the output
drivers. However, the device includes further capability to automatically power down an output driver whenever it
does enter into short-circuit protection, without requiring intervention from the user. In this case, the output driver
will stay in a power down condition until the user specifically programs it to power down and then power back up
again, to clear the short-circuit flag.
The TLV320DAC32 includes extensive capability to monitor a headphone, microphone, or headset jack,
determine if a plug has been inserted into the jack, and then determine what type of headset/headphone is wired
to the plug. Figure 35 shows one configuration of the device that enables detection and determination of headset
type when a pseudo-differential (capless) stereo headphone output configuration is used. The registers used for
this function are Page-0/Reg 14, 37, 38, and 13. The type of headset detected can be read back from
Page-0/Reg-13. Note that for best results, it is recommended to select a MICBIAS value as high as possible, and
to program the output driver common-mode level at a 1.35V or 1.5V level.
34
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC32
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| TLV320DAC32IRHBRG4 | 功能描述:音頻數/模轉換器 IC Lo-Pwr Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC32IRHBT | 功能描述:音頻數/模轉換器 IC Low Power Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC32IRHBTG4 | 功能描述:音頻數/模轉換器 IC Low Power Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC33NIZQC | 制造商:Texas Instruments 功能描述: |
| TLV320DAC33NIZQCR | 制造商:Texas Instruments 功能描述: |
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