參數(shù)資料
型號(hào)： TLV5604IPWRG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： DAC
英文描述： SERIAL INPUT LOADING, 8.5 us SETTLING TIME, 10-BIT DAC, PDSO16
封裝： GREEN, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 13/31頁(yè)
文件大?。?/td> 572K
代理商： TLV5604IPWRG4
TLV5604
2.7-V TO 5.5-V 10-BIT 3-
S QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS
WITH POWER DOWN
SLAS176B – DECEMBER 1997 – REVISED JULY 2002
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
TLV5604 interfaced to MCS51 microcontroller
hardware interfacing
Figure 18 shows an example of how to connect the TLV5604 to an MCS51 Microcontroller. The serial DAC
input data and external control signals are sent via I/O Port 3 of the controller. The serial data is sent on the RxD
line, with the serial clock output on the TxD line. Port 3 bits 3, 4, and 5 are configured as outputs to provide the
DAC latch update (LDAC), chip select (CS) and frame sync (FS) signals for the TLV5604. The active low power
down pin (PD) of the TLV5604 is pulled high to ensure that the DACs are enabled.
RxD
TxD
P3.3
P3.4
MCS
51
SDIN
SCLK
FS
CS
LDAC
REF
VDD
PD
VOUTA
VOUTB
VOUTC
VOUTD
VSS
TLV5604
P3.4
REFINAB
REFINCD
Figure 18. TLV5604 Interfaced with MCS51
software
The example is the same as for the TMS320C203 in this datasheet, but adapted for a MCS
51 controller. It
generates a differential in-phase (sine) signal between the VOUTA and VOUTB pins, and it’s quadrature
(cosine) signal as the differential signal between VOUTC and VOUTD.
The on-chip timer is used to generate interrupts at a fixed frequency. The related interrupt service routine pulses
LDAC low to update all 4 DACs simultaneously, then fetches and writes the next sample to all 4 DACs. The
samples are stored as a look-up table, which describes one full period of a sine wave.
The serial port of the controller is used in Mode 0, which transmits 8 bits of data on RxD, accompanied by a
synchronous clock on TxD. Two writes concatenated together are required to write a complete word to the
TLV5604. The CS and FS signals are provided in the required fashion through control of IO port 3, which has
bit addressable outputs.
MCS is a registered trademark of Intel Corporation.
相關(guān)PDF資料
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TLV5604IPWG4 SERIAL INPUT LOADING, 8.5 us SETTLING TIME, 10-BIT DAC, PDSO16
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