- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376565 > DAC8812C (Texas Instruments, Inc.) Dual, Serial Input 16-Bit Multiplying Digital-to-Analog Converter PDF資料下載
參數(shù)資料
| 型號： | DAC8812C |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Dual, Serial Input 16-Bit Multiplying Digital-to-Analog Converter |
| 中文描述： | 雙路，串行輸入16位乘法數(shù)字到模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大小： | 1671K |
| 代理商： | DAC8812C |
www.ti.com
SERIAL DATA INTERFACE
The DAC8812 uses a 3-wire (CS, SDI, CLK) SPI-compatible serial data interface. Serial data of the DAC8812 is
clocked into the serial input register in an 18-bit data-word format. MSB bits are loaded first.
Table 1
defines the
18 data-word bits for the DAC8812.
DAC8812
SBAS349A–AUGUST 2005–REVISED DECEMBER 2005
Data is placed on the SDI pin, and clocked into the register on the positive clock edge of CLK subject to the data
setup and data hold time requirements specified in the
Interface Timing
specifications of the
Electrical
Characteristics
. Data can only be clocked in while the CS chip select pin is active low. For the DAC8812, only
the last 18 bits clocked into the serial register are interrogated when the CS pin returns to the logic high state.
Since most microcontrollers output serial data in 8-bit bytes, three right-justified data bytes can be written to the
DAC8812. Keeping the CS line low between the first, second, and third byte transfers will result in a successful
serial register update.
Once the data is properly aligned in the shift register, the positive edge of the CS initiates the transfer of new
data to the target DAC register, determined by the decoding of address bits A1 and A0. For the DAC8812,
Table 1
,
Table 2
,
Table 3
, and
Figure 1
define the characteristics of the software serial interface.
Table 1. Serial Input Register Data Format, Data Loaded MSB First
(1)
B17
(MSB)
B0
Bit
B16
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
(LSB)
Data
A1
A0
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
(1)
Only the last 18 bits of data clocked into the serial register (address + data) are inspected when the CS line positive edge returns to
logic high. At this point an internally-generated load strobe transfers the serial register data contents (bits D15-D0) to the decoded
DAC-input-register address determined by bits A1 and A0. Any extra bits clocked into the DAC8812 shift register are ignored; only the
last 18 bits clocked in are used. If double-buffered data is not needed, the LDAC pin can be tied logic low to disable the DAC registers.
Table 2. Control Logic Truth Table
(1)
CS
CLK
LDAC
RS
MSB
SERIAL SHIFT REGISTER
INPUT REGISTER
DAC REGISTER
H
X
H
H
X
No effect
Latched
Latched
L
L
H
H
X
No effect
Latched
Latched
L
↑
+
H
H
H
X
Shift register data advanced one bit
Latched
Latched
L
H
H
X
No effect
Latched
Latched
↑
+
H
L
H
H
X
No effect
Selected DAC updated with current SR contents
Latched
X
L
H
X
No effect
Latched
Transparent
H
X
H
H
X
No effect
Latched
Latched
H
X
↑
+
H
H
X
No effect
Latched
Latched
H
X
L
0
No effect
Latched data = 0000h
Latched data = 0000h
H
X
H
L
H
No effect
Latched data = 8000h
Latched data = 8000h
(1)
↑
+
= Positive logic transition;
X
= Do not care
Table 3. Address Decode
A1
0
0
1
1
A0
0
1
0
1
DAC DECODE
None
DAC A
DAC B
DAC A and DAC B
13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC8814IBDB | Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter |
| DAC8814ICDB | Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter |
| DAC8820IB | 16-Bit, Parallel Input Multiplying Digital-to-Analog Converter |
| DAC8820IC | 16-Bit, Parallel Input Multiplying Digital-to-Analog Converter |
| DAC8832IBRGY | 16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC8812IBPW | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Dual Serial Input Multiplying 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 |
| DAC8812IBPW | 制造商:Texas Instruments 功能描述:D/A Converter (D-A) IC |
| DAC8812IBPWG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Dual Serial Input Multiplying 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 |
| DAC8812IBPWR | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Dual Serial Input Multiplying 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 |
| DAC8812IBPWRG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Dual Serial Input Multiplying 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。