參數(shù)資料
型號(hào)： DAC8801IDGKRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： DAC
英文描述： SERIAL INPUT LOADING, 0.5 us SETTLING TIME, 14-BIT DAC, PDSO8
封裝： 3 X 5 MM, GREEN, PLASTIC, MSOP-8
文件頁(yè)數(shù)： 3/20頁(yè)
文件大?。?/td> 629K
代理商： DAC8801IDGKRG4
www.ti.com
Bipolar Output Circuit
V
OUT
+
D
16, 384 *
1
V
REF
(2)
R
FB
OPA277
U4
2.5 V 3 VOUT 3 +2.5 V
VOUT
10 kW
+2.5 V
VREF
VDD
GND
DAC8801
OPA277
U2
IOUT
C1
C2
5 kW
+
+
(+10 V)
(10 V 3 VOUT 3 +10 V)
Programmable Current Source Circuit
I
L +
(R2
) R3)
R1
R3
V
REF
D
(3)
VDD
VREF
DAC8801
U1
RFB
OPA277
U2
IOUT
GND
150 kW
R14
15 kW
R24
C1
10 pF
OPA277
U2
15 kW
R2
50 W
R34
50 W
R3
VOUT
150 kW
R1
IL
LOAD
+
SLAS403B – NOVEMBER 2004 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
The DAC8801, as a 2-quadrant multiplying DAC, can be used to generate a unipolar output. The polarity of the
full-scale output IOUT is the inverse of the input reference voltage at VREF.
Some applications require full 4-quadrant multiplying capabilities or bipolar output swing. As shown in Figure 22,
external op amp U4 is added as a summing amp and has a gain of 2X that widens the output span to 5 V. A
4-quadrant multiplying circuit is implemented by using a 2.5-V offset of the reference voltage to bias U4.
According to the circuit transfer equation given in Equation 2, input data (D) from code 0 to full scale produces
output voltages of VOUT = -2.5 V to VOUT = 2.5 V.
Figure 22. Bipolar Output Circuit
A DAC8801 can be integrated into the circuit in Figure 23 to implement an improved Howland current pump for
precise voltage to current conversions. Bidirectional current flow and high voltage compliance are two features of
the circuit. A application of this circuit includes a 4-mA to 20-mA current transmitter with up to a 500-
load.
With a matched resistor network, the load current of the circuit is shown in Equation 3:
Figure 23. Programmable Bidirectional Current Source Circuit
11
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC8801IDGKT 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 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(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
DAC8801IDGKT 制造商:Texas Instruments 功能描述:IC DAC 14BIT MULTIPLYING 8-MSOP 制造商:Texas Instruments 功能描述:IC, DAC 14BIT MULTIPLYING 8-MSOP 制造商:Texas Instruments 功能描述:IC, DAC 14BIT MULTIPLYING 8-MSOP; Resolution (Bits):14bit; Sampling Rate:2MSPS; Input Channel Type:Serial; Supply Voltage Range:2.7V to 5.5V; Digital IC Case Style:SOP; No. of Pins:8; Data Interface:3 Wire, Serial; Supply ;RoHS Compliant: Yes
DAC8801IDGKTG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit Serial Input Mult DAC 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
DAC8801IDRB 制造商:BB 制造商全稱:BB 功能描述:14-Bit, Serial Input Multiplying Digital-to-Analog Converter
DAC8801IDRBR 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 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(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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