參數(shù)資料
型號(hào)： TLV5614IPW
廠商： TEXAS INSTRUMENTS INC
元件分類： DAC
英文描述： SERIAL INPUT LOADING, 9 us SETTLING TIME, 12-BIT DAC, PDSO16
封裝： GREEN, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 14/34頁(yè)
文件大?。?/td> 737K
代理商： TLV5614IPW
TLV5614
2.7-V TO 5.5-V 12-BIT 3-
S QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS
WITH POWER DOWN
SLAS188B – SEPTEMBER 1998 – REVISED APRIL 2003
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
TLV5614 interfaced to MCS51 microcontroller
hardware interfacing
Figure 18 shows an example of how to connect the TLV5614 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 TLV5614. The active low power
down pin (PD) of the TLV5614 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
TLV5614
P3.4
REFINAB
REFINCD
Figure 19. TLV5614 Interfaced With MCS51
software
The example is the same as for the TMS320C203 in this data sheet, but adapted for a MCS51 controller. It
generates a differential in-phase (sine) signal between the VOUTA and VOUTB pins, and its quadrature (cosine)
signal is 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
TLV5614. The CS and FS signals are provided in the required fashion through control of IO port 3, which has
bit addressable outputs.
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TLV5614IYER 功能描述:數(shù)模轉(zhuǎn)換器- DAC 2.7-5.5V 12-Bit RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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