TLC7225IDWR集成电路IC

The TLC7225 consists of four 8-bit voltage-output di*al-to-*og 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 common 8-bit TTL/CMOS-compatible (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 *og 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 compatible and the control logic is speed compatible with most 8-bit
microprocessors. Each DAC includes an output buffer amplifier capable of driving up to 5 mA of output current.
The TLC7225 performance is specified for input reference voltages from 2 V to V
 ¨C 4 V with dual supplies
DD
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 LinBiCMOS? process that has been specifically developed to allow high-speed
di*al logic circuits and precision *og circuits to be integrated on the same chip. The TLC7225 has a common
8-bit data bus with individual DAC latches. This provides a versatile control architecture for simple interface to
microprocessors. All latch-enable signals are level triggered.
Combining four DACs, four operational amplifiers, and interface logic into a *all, 0.3-inch wide, 24-terminal
SOIC allows significant reduction in board space requirements and offers increased reliability in systems using
multiple converters. The pinout optimizes board layout with all of the *og inputs and outputs at one end of
the package and all of the di*al inputs at the other.
The TLC7225C is characterized for operation from 0?C to 70?C. The TLC7225I is characterized for operation
from ¨C2?C to 85?C.