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參數(shù)資料
| 型號(hào)： | TLV990-40PFB |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | GREEN, PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大小： | 418K |
| 代理商： | TLV990-40PFB |
TLV99040
3V, 10BIT, 40MSPS AREA CCD ANALOG FRONT END
SLAS326A JANUARY 2001 REVISED MARCH 2004
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
device reset
When pin RESET (pin 29) is pulled low, all internal registers are set to their default values. The device also resets
itself when it is first powered on. In addition, the TLV990-40 has a software-reset function that resets the device
when writing a control bit to the control register.
See the register definition section for the register default values.
voltage references
An internal precision-voltage reference of 1.5 V nominal is provided. This reference voltage is used to generate
the ADC Ref voltage of 1 V and Ref+ of 2 V. It is also used to set the clamp voltage. All internally-generated
voltages are fixed values and cannot be adjusted.
power-down mode (standby)
The TLV990-40 implements both hardware and software power-down modes. Pulling pin STBY (pin 30) low
puts the device in the low-power standby mode. Total supply current drops to about 0.6 mA. Setting a
power-down control bit in the control register can also activate the power-down mode. The user can still program
all internal registers during the power-down mode.
power supply
The TLV990-40 has several power-supply pins. Each major internal analog block has a dedicated AVDD supply
pin. All internal digital circuitry is powered by DVDD. Both AVDD and DVDD are 3-V nominal.
The DIVDD and DIGND pins supply power to the output digital driver (D9D0). The DIVDD is independent of the
DVDD and can be operated from 1.8 V to 4.4 V. This allows the outputs to interface with digital ASICs requiring
different supply voltages.
ground and decoupling
All ground pins of the TLV990-40 are not internally connected and must be connected externally to PCB ground.
General practices should apply to the PCB design to limit high-frequency transients and noise that are fed back
into the supply and reference lines. This requires that the supply and reference pins be sufficiently bypassed.
In the case of power supply decoupling, 0.1-
F ceramic chip capacitors are adequate to keep the impedance
low over a wide frequency range. Recommended external decoupling for the three voltage-reference pins is
shown in Figure 4. Since their effectiveness depends largely on the proximity to the individual supply pin, all
decoupling capacitors should be placed as close as possible to the supply pins.
To reduce high-frequency and noise coupling, it is highly recommended that digital and analog grounds be
shorted immediately outside the package. This can be accomplished by running a low-impedance line between
DGND and AGND under the package.
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| TLV990-40PFBG4 | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 3-V 10-Bit 40 MSPS Area CCD RoHS:否 制造商:Texas Instruments 輸入信號(hào)類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| TLV990B | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V, 10-BIT, 28-MSPS AREA CCD AND VIDEO SIGNAL PROCESSOR |
| TLV990BPFB | 功能描述:IC CCD SIGNAL PROC/DGTZR 48TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模擬前端 (AFE) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):- 通道數(shù):2 功率（瓦特）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:32-QFN（5x5） 包裝:帶卷 (TR) |
| TLV990PFB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V, 10-BIT, 28-MSPS AREA CCD AND VIDEO SIGNAL PROCESSOR |
| TLVAIC12KIRHBRG4 | 功能描述:接口—CODEC Lo-Pwr Mono Voice Band CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型: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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