- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376562 > DAC7811IDRCR (Texas Instruments, Inc.) 12-Bit, Serial Input, Multiplying Digital-to-Analog Converter PDF資料下載
參數(shù)資料
| 型號： | DAC7811IDRCR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 12-Bit, Serial Input, Multiplying Digital-to-Analog Converter |
| 中文描述： | 12位，串行輸入，乘法數(shù)字到模擬轉換器 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大小： | 698K |
| 代理商： | DAC7811IDRCR |
www.ti.com
P
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
40
20
0
20
Temperature ( C)
40
60
80
100
120
G
V
REF
= +10V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
40
20
0
20
Temperature ( C)
40
60
80
100
120
O
V
REF
= +10V
Theory of Operation
R
R
R
R
2R
2R
2R
2R
R
FB
I
OUT2
I
OUT 1
2R
V
REF
DB0
(LSB)
DB9
DB10
DB11
(MSB)
V
OUT
V
REF
CODE
4096
(1)
DAC7811
SBAS337–APRIL 2005
TYPICAL CHARACTERISTICS: V
DD
= +3 V (continued)
At T
A
= +25
°
C, +V
DD
= +3 V, unless otherwise noted.
GAIN ERROR
vs TEMPERATURE
OUTPUT LEAKAGE
vs TEMPERATURE
Figure 23.
Figure 24.
The DAC7811 is a single channel current output, 12-bit digital-to-analog converter (DAC). The architecture,
illustrated in Figure 25, is an R-2R ladder configuration with the three MSBs segmented. Each 2R leg of the
ladder is either switched to I
or the I
terminal. The I
terminal of the DAC is held at a virtual GND
potential by the use of an external I/V converter op amp. The R-2R ladder is connected to an external reference
input V
REF
that determines the DAC full-scale current. The R-2R ladder presents a code independent load
impedance to the external reference of 10 k
±
20%. The external reference voltage can vary in a range of –15 V
to +15 V, thus providing bipolar I
OUT
current operation. By using an external I/V converter and the DAC7811 R
FB
resistor, output voltage ranges of -V
REF
to V
REF
can be generated.
Figure 25. Equivalent R-2R DAC Circuit
When using an external I/V converter and the DAC7811 R
FB
resistor, the DAC output voltage is given by
Equation 1:
Each DAC code determines the 2R leg switch position to either GND or I
OUT
. Because the DAC output
impedance as seen looking into the I
OUT1
terminal changes versus code, the external I/V converter noise gain will
also change. Because of this, the external I/V converter op amp must have a sufficiently low offset voltage such
that the amplifier offset is not modulated by the DAC I
OUT1
terminal impedance change. External op amps with
large offset voltages can produce INL errors in the transfer function of the DAC7811 due to offset modulation
versus DAC code.
9
相關PDF資料 |
PDF描述 |
|---|---|
| DAC7821IRGPR | 50/MDR/WMNT/PLASTIC PLUG/20MIN |
| DAC7821IRGPT | 12-Bit, Parallel Input, Multiplying Digital-to-Analog Converter |
| DAC80-CBI-I | Monolithic 12-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC80 | Monolithic 12-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC8012KU-BI | 12-Bit Digital-to-Analog Converter |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DAC7811IDRCT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-Bit, Serial Input, Multiplying Digital-to-Analog Converter |
| DAC7821 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-Bit, Parallel Input, Multiplying Digital-to-Analog Converter |
| DAC7821IPW | 功能描述:數(shù)模轉換器- DAC 12-Bit Parallel Inp Multiplying DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7821IPW | 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC |
| DAC7821IPWG4 | 功能描述:數(shù)模轉換器- DAC 12-bit Parallel Inp Multiplying DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率: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。