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參數(shù)資料
| 型號(hào)： | DS3514T+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 4/21頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC I2C GAMMA/VCOM BUFF 48-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 101 |
| 應(yīng)用： | TFT-LCD 面板：伽瑪緩沖器，VCOM 驅(qū)動(dòng)器 |
| 輸出類型： | 滿擺幅 |
| 電路數(shù)： | 14 |
| 電流 - 電源： | 5mA |
| 電流 - 輸出 / 通道： | 4mA |
| 電壓 - 電源，單路/雙路(±)： | 9 V ~ 15 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFN-EP（7x7） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 1429 (CN2011-ZH PDF) |
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DS3514
I2C Gamma and VCOM Buffer with EEPROM
12
______________________________________________________________________________________
Map, the Latch A registers for each channel are
accessed through memory addresses 00–1Ch. Then,
like the other modes, the LD pin determines when the
DACs are updated. If the LD signal is high, Latch B is
flow-through and the DAC is updated immediately. If
LD is low, Latch B is loaded from Latch A after a low-to-
high transition on the LD pin. This latter method allows
the timing of the DAC update to be controlled by an
external signal pulse.
VCOM/Gamma Channel Outputs
As illustrated in the
Block Diagram, the gamma channel
outputs are equivalent to a 10-bit digital potentiometer
(DAC) with a buffered output. The VCOM channel is
equivalent to an 8-bit digital potentiometer (DAC) with a
buffered output. The VCOM channel’s digital poten-
tiometer is composed of 255 equal resistive elements.
The relationship between output voltage and DAC set-
ting is illustrated in Table 3a. Unlike the gamma chan-
nels, the VCOM channel is capable of outputting a
range of voltages including both references (VRH and
VRL). Each of the gamma channel digital potentiome-
ters, on the other hand, are composed of 1024 equal
resistive elements. The extra resistive element prohibits
one of the rails from being reached. In particular,
gamma channel outputs GM1–GM7 can span from
(and including) GLL to 1 LSB away from GLM.
Likewise, gamma channel outputs GM8–GM14 span
from (and including) GHM to 1 LSB away from GHH.
The relationship between output voltage and DAC set-
ting for the gamma channels are also illustrated in
Table 3b.
Standby Mode
Standby mode (not to be confused with the three
DS3514 operating modes) can be used to minimize
current consumption. Standby mode is entered by set-
ting the STANDBY bit, which is the MSB of register 41h.
The VCOM and gamma outputs are placed in a high-
impedance state. Current drawn from the VDD supply in
this state is specified as IDDQ.
The DS3514 continues to respond to I2C commands,
and thus draws some current from VCC when I2C activi-
ty is occurring. When the I2C interface is inactive, cur-
rent drawn from the VCC supply is specified as ICCQ.
Thermal Shutdown
As a safety feature, the DS3514 goes into a thermal
shutdown state if the junction temperature ever reaches
SETTING
(HEX)
VCOM OUTPUT VOLTAGE
00h
VRL
01h
VRL + (1/255) x (VRH - VRL)
02h
VRL + (2/255) x (VRH - VRL)
03h
VRL + (3/255) x (VRH - VRL)
0Fh
VRL + (15/255) x (VRH - VRL)
3Fh
VRL + (63/255) x (VRH - VRL)
7Fh
VRL + (127/255) x (VRH - VRL)
FDh
VRL + (253/255) x (VRH - VRL)
FEh
VRL + (254/255) x (VRH - VRL)
FFh
VRH
Table 3a. VCOM DAC Voltage/Data
Relationship for Selected Codes
Table 3b. Gamma DAC Voltage/Data Relationship for Selected Codes
SETTING
(HEX)
GM1–GM7 OUTPUT VOLTAGE
GM8–GM14 OUTPUT VOLTAGE
000h
GLM + (0 + 1) x ((GLL - GLM)/1024)
GHM + (0 + 1) x ((GHH - GHM)/1024)
001h
GLM + (1 + 1) x ((GLL - GLM)/1024)
GHM + (1 + 1) x ((GHH - GHM)/1024)
002h
GLM + (2 + 1) x ((GLL - GLM)/1024)
GHM + (2 + 1) x ((GHH - GHM)/1024)
003h
GLM + (3 + 1) x ((GLL - GLM)/1024)
GHM + (3 + 1) x ((GHH - GHM)/1024)
00Fh
GLM + (15 + 1) x ((GLL - GLM)/1024)
GHM + (15 + 1) x ((GHH - GHM)/1024)
03Fh
GLM + (63 + 1) x ((GLL - GLM)/1024)
GHM + (63 + 1) x ((GHH - GHM)/1024)
07Fh
GLM + (127 + 1) x ((GLL - GLM)/1024)
GHM + (127 + 1) x ((GHH - GHM)/1024)
0FFh
GLM + (255 + 1) x ((GLL - GLM)/1024)
GHM + (255 + 1) x ((GHH - GHM)/1024)
3FDh
GLM + (1021 + 1) x ((GLL - GLM)/1024)
GHM + (1021 + 1) x ((GHH - GHM)/1024)
3FEh
GLM + (1022 + 1) x ((GLL - GLM)/1024)
GHM + (1022 + 1) x ((GHH - GHM)/1024)
3FFh
GLL
GHH
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| DS3514T+ | 功能描述:LCD Gamma緩沖器 I2C Gamma & VCOM Buffer w/EEPROM RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| DS3514T+T&R | 制造商:Maxim Integrated Products 功能描述:14 CH GAMMA+VCOM 10BIT 48 TQFN T&R - Tape and Reel |
| DS3514T+T&R | 功能描述:LCD Gamma緩沖器 I2C Gamma & VCOM Buffer w/EEPROM RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| DS3514T+TR | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Gamma and VCOM Buffer with EEPROM |
| DS3516FP000 | 制造商:Thomas & Betts 功能描述:30A,CON,4P5W,MG,516,3PY120V |
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