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参数资料
| 型号： | MAX1512ETA |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | 16-Bit Transceivers With Parity Generators / Checkers And 3-State Outputs 56-SSOP -40 to 85 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, DSO8 |
| 封装： | 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEEC, TDFN-8 |
| 文件页数： | 6/12页 |
| 文件大小： | 682K |
| 代理商： | MAX1512ETA |
M
EEPROM-Programmable TFT VCOM Calibrator
6
_______________________________________________________________________________________
Detailed Description
The MAX1512 is a solid-state alternative to mechanical
potentiometers used for adjusting the LCD backplane
voltage (VCOM) in TFT LCD displays. The MAX1512
attaches to an external resistive voltage-divider and
sinks a programmable current (I
OUT
), which sets the
VCOM level (Figure 1). An internal 7-bit DAC controls
the sink current and allows the user to increase or
decrease the VCOM level (Figure 2). The DAC is ratio-
metric relative to AVDD and is monotonic over all oper-
ating conditions. The user can store the DAC setting in
an internal EEPROM. On power-up, the EEPROM pre-
sets the DAC to the last stored setting. The single-wire
interface between the LCD panel and the programming
circuit adjusts the DAC, programs the EEPROM, and
provides programming power.
The resistive voltage-divider and the AVDD supply set
the maximum value of VCOM. The MAX1512 sinks cur-
rent from the voltage-divider to reduce the VCOM level.
The external resistor R
SET
sets the full-scale sink cur-
rent and the minimum value of VCOM.
Pin Description
PIN
NAME
FUNCTION
1
OUT
Adjustable Sink-Current Output. OUT connects to the resistive voltage-divider between AVDD and GND that
sets the VCOM voltage. I
OUT
lowers the divider voltage by an adjustable amount. See the SET pin
description.
2
3
4
5
AVDD
N.C.
GND
V
DD
High-Voltage Analog Supply. Connects to the panel source-driver supply rail.
No Connect. Not internally connected.
Ground
Supply Input. +2.6V to +3.6V input range.
6
CTL
VCOM Adjustment and EEPROM Programming Control. CTL sets the internal DAC code and programs the
EEPROM. A pulse-control method is used to adjust the VCOM level. See the
VCOM Adjustment (CTL)
section
.
To program the DAC setting into the EEPROM as the power-on default, drive CTL to the EEPROM
programming voltage using the correct timing and voltage ramp rates. See the
EEPROM Programming
(CTL)
section
.
7
CE
Control Interface Enable. Connect CE to V
DD
to enable the CTL input. Connect CE to GND to disable the
CTL input and reduce the supply current.
8
SET
Full-Scale Sink-Current Adjustment Input. Connect a resistor, R
SET
, from SET to GND to set the full-scale
adjustable sink current. The full-scale adjustable sink current is equal to:
I
OUT
is equal to the current through R
SET
.
R
SET
20
CE
CTL
AVDD
R
SET
25k
OUT
R2
245k
R1
200k
VCOM
5V
SET
GND
V
DD
V
DD
3V
AVDD
10V
MAX1512
Figure 1. Standard Application Circuit
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1512 | EEPROM-Programmable TFT VCOM Calibrator |
| MAX1515 | Low-Voltage, Internal Switch, Step-Down/DDR Regulator |
| MAX1515ETG | Low-Voltage, Internal Switch, Step-Down/DDR Regulator |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1512ETA+ | 制造商:Maxim Integrated Products 功能描述:EEPROM-PROGRAMMABLE TFT VCOM CALIBRATOR - Rail/Tube |
| MAX1512ETA+T | 功能描述:LCD Gamma缓冲器 EEPROM-Prog TFT VCOM Calibrator RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| MAX1512ETA+TG104 | 制造商:Maxim Integrated Products 功能描述:EEPROM-PROGRAMMABLE TFT VCOM CALIBRATOR - Tape and Reel |
| MAX1512ETA-T | 功能描述:LCD Gamma缓冲器 RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| MAX1512EVKIT | 制造商:Maxim Integrated Products 功能描述:#EMPTY - Bulk |
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