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MAS8444A

ETC
Part Number MAS8444A
Manufacturer ETC
Description OCTAL 6-BIT TRIMMER IC
Published Apr 27, 2005
Detailed Description DA8444A.005 May 31, 1996 MAS8444A OCTAL 6-BIT TRIMMER IC • Eight discrete DACs 2 • I C-bus slave receiver • Voltage out...
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MAS8444A
MAS8444A

Overview
DA8444A.
005 May 31, 1996 MAS8444A OCTAL 6-BIT TRIMMER IC • Eight discrete DACs 2 • I C-bus slave receiver • Voltage output DESCRIPTION The MAS8444a comprises eight digital to analog converters (DACs) each controlled by a two-wire I2C bus.
The DACs are individually programmed using an 6-bit word to select an output from one of 64 voltage steps.
The maximum output voltage of all DACs is set by Vmax.
At power-on all outputs are set to their lowest value.
The I2C-bus slave receiver has 3 programmable address pins (2 in the SO16 package).
FEATURES • Rail to rail output stages • Octal 6-bit DACs on a single monolithic chip • Power   supply¡ range from +5V to +12V • -25 C to +85 C temperature range • 16-pin PDIL and SO package • pin to pin compatibility with TDA8444 APPLICATION • Trimmer replacement • Automatic gain control • High resolution monitors BLOCK DIAGRAM SDA 3 SCL 4 A0 5 A1 6 A2 7 I C Bus Slave Receiver 2 6-BIT DAC DAC7 6-BIT DAC DAC6 DAC5 6-BIT DAC 6-BIT DAC 6-BIT DAC 6-BIT DAC DAC4 DAC3 DAC2 DAC1 Vmax 2 Reference Voltage Generator 6-BIT DAC 6-BIT DAC DAC0 1 8 VDD GND 1 DA8444A.
005 May 31, 1996 PIN CONFIGURATION PDIP 16 MAS8444AN VDD 1 Vmax 2 SDA 3 SCL 4 A0 5 A1 6 A2 7 GND 8 16 DAC7 15 DAC6 14 DAC5 13 DAC4 12 DAC3 11 DAC2 10 DAC1 9 DAC0 SO16 MAS8444AS VDD Vmax SDA SCL NC A0 A1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DAC7 DAC6 DAC5 DAC4 DAC3 DAC2 DAC1 DAC0 PIN DESCRIPTION Pin name Pin no.
PDIP1 6 VDD Vmax SDA SCL A0 A1 A2 GND DAC0 DAC1 DAC2 DAC3 DAC4 DAC5 DAC6 DAC7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SO16 1 2 3 4 6 7 NC 8 9 10 11 12 13 14 15 16 P I I/O I I I I G O O O O O O O O Positive supply voltage Control input for DAC maximum output voltage I2C bus serial data input/output I2C bus serial data clock Programmable address bits for I2C bus slave receiver Programmable address bits for I2C bus slave receiver Programmable address bits for I2C bus slave receiver Ground Analog voltage output Analog voltage output Analog voltage output ...


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