MAX749CPA+ by Analog Devices

Digitally Adjustable LCD Bias Supply


The MAX749 generates negative LCD-bias contrast voltages from 2V to 6V inputs. Full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). Only seven small surface-mount components are required to build a complete supply. The output voltage can also be adjusted using a PWM signal or a potentiometer. A unique current-limited control scheme reduces supply current and maximizes efficiency, while a high switching frequency (up to 500kHz) minimizes the size of external components. Quiescent current is only 60µA max and is reduced to under 15µA in shutdown mode. While shut down, the MAX749 retains the voltage set point, simplifying software control. The MAX749 drives either an external P-channel MOSFET or a PNP transistor.

Where to Buy

Prices starting from US$2.99

Distributor Stock
Logo for RS
RS
from US$4.98
60
in stock
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Logo for Analog Devices
Analog Devices
from US$4.57
3,778
in stock
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Logo for Schukat Electronic
Schukat Electronic
from US$4.12
25
in stock
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Logo for Newark Electronics
Newark Electronics
from US$4.52
-
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Logo for element14
element14
from US$4.77
-
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Farnell
from US$2.99
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Features

+2.0V to +6.0V Input Voltage Range
Flexible Control of Output Voltage: Digital Control Potentiometer Adjustment PWM Control
Digital Control
Potentiometer Adjustment
PWM Control
Output Voltage Range Set by One Resistor
Low, 60µA Max Quiescent Current
15µA Max Shutdown Mode
Small Size - 8-Pin SO and Plastic DIP Packages

Specifications

VIN (V) (min) 2
VIN (V) (max) 6
VOUT1 (V) (min) -2
VOUT1 (V) (max) -100
IOUT1 (A) (max) 0.1
Switch Type External
Output Adjust. Method Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins PDIP/8SOIC (N)/8
BudgetaryPrice (See Notes) 3.11


MAX749CPA+ Sensors & Transducers by Analog Devices

LCD BIAS SUPPLY 6VIN -100V 8DIP

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Driver Configuration Inverting
Peak Output Current 50mA
Supply Voltage Min 2V
Supply Voltage Max 6V
Driver Case Style DIP
No. of Pins 8Pins
Input Delay 125ns
Output Delay 125ns
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL -
SVHC No SVHC (15-Jan-2018)
Base Number 749
No. of Outputs 1Outputs
Operating Temperature Range 0°C to +70°C
Output Current 100mA
Output Voltage -100V

Alternative Descriptions

Digitally Adjustable LCD Bias | Analog Devices
Digitally Adjustable LCD Bias Supply | RS
LCD Bias Supply Dig Adj DIP8 | Schukat Electronic
Digitally Adj Lcd Bias Supply, 70Deg C | Newark Electronics
DIGITALLY ADJ LCD BIAS SUPPLY, 70DEG C | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX749CPA+ ?

Additional datasheets, footprints and schematics for MAX749CPA+ are listed on our Part Details page. You can also find images and similar parts to MAX749CPA+ on this page.

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Is the MAX749CPA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX749CPA+ have stock available?

Authorised distributors including Analog Devices, RS, Schukat Electronic, Newark Electronics and element14 have stock available or on a lead time for MAX749CPA+ .

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