TLC7225C Datasheet | Texas Instruments

TLC7225C, TLC7225I QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS D Four 8-Bit D/A Converters With Individual References D Direct Bipolar Operation Without an External Level-Shift Amplifier D Microprocessor patible D TTL/CMOS patible D Single Supply Operation Possible D Simultaneous Update Facility D Binary Input Coding applications D Process Control D Automatic Test Equipment D Automatic Calibration of Large System Parameters e.g., Gain/Offset SLAS109B - OCTOBER 1996 - REVISED FEBRUARY 2001 DW PACKAGE (TOP VIEW) OUTB 1 OUTA 2 VSS 3 REFB 4 REFA 5 AGND 6 DGND 7 LDAC 8 (MSB) DB7 9 DB6 10 DB5 11 DB4 12 24 OUTC 23 OUTD 22 VDD 21 REFC 20 REFD 19 A0 18 A1 17 WR 16 DB0 (LSB) 15 DB1 14 DB2 13 DB3 description The TLC7225 consists of four 8-bit voltage-output digital-to-analog converters (DACs), with output buffer amplifiers and interface logic with double register-buffering. Separate on-chip latches are provided for each of the DACs. Data is transferred into one of these data latches through a mon 8-bit TTL/CMOS-patible (5 V) input port. Control inputs A0 and A1 determine which DAC is loaded when WR goes low. Only the data held in the DAC registers determines the analog outputs of the converters. The double register buffering allows simultaneous update of all four outputs under control of LDAC. All logic inputs are TTL- and CMOS-level patible and the control logic is speed patible with most 8-bit microprocessors. Each DAC includes an output buffer amplifier capable of driving up to 5 m A of output current. The TLC7225 performance is specified for input reference voltages from 2 V to VDD - 4 V with dual supplies. The voltage-mode configuration of the DACs allow the TLC7225 to be operated from a single power-supply rail at a reference of 10 V. The TLC7225 is fabricated in a Lin Bi CMOS process that has been specifically developed to allow high-speed digital logic circuits and precision analog circuits to be integrated on the same chip. The TLC7225 has a...