參數(shù)資料
型號: DAC8811B
廠商: Texas Instruments, Inc.
英文描述: 16-Bit, Serial Input Multiplying Digital-to-Analog Converter
中文描述: 16位串行輸入乘法數(shù)字到模擬轉(zhuǎn)換器
文件頁數(shù): 11/15頁
文件大?。?/td> 421K
代理商: DAC8811B
www.ti.com
Z
O
R1 R3 R1
R3
R2
R1 R2
R1 R2
R3
(4)
V
DD
V
DD
V
REF
V
REF
DAC8811
U1
R
FB
OPA277
U2
I
OUT
GND
150 k
R1
15 k
R2
C1 10 pF
OPA277
U2
15 k
R2
50 k
R3
50
R3
V
OUT
150 k
R1
I
L
LOAD
+
+
Cross-Reference
The DAC8811 has an industry-standard pinout. Table 4 provides the cross-reference information.
DAC8811
SLAS411A–NOVEMBER 2004–REVISED DECEMBER 2004
The value of R3 in the previous equation can be reduced to increase the output current drive of U3. U3 can drive
±
20 mA in both directions with voltage compliance limited up to 15 V by the U3 voltage supply. Elimination of the
circuit compensation capacitor C1 in the circuit is not suggested as a result of the change in the output
impedance Z
O
, according to Equation 4:
As shown in Equation 4, with matched resistors, Z
O
is infinite and the circuit is optimum for use as a current
source. However, if unmatched resistors are used, Z
O
is positive or negative with negative output impedance
being a potential cause of oscillation. Therefore, by incorporating C1 into the circuit, possible oscillation problems
are eliminated. The value of C1 can be determined for critical applications; for most applications, however, a
value of several pF is suggested.
Figure 23. Programmable Bidirectional Current Source Circuit
Table 4. Cross-Reference
SPECIFIED
TEMPERATURE
RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PACKAGE
DESCRIPTION
8-Lead MicroSOIC
8-Lead MicroSOIC
8-Lead Small Outline
8-Lead Small Outline
8-Lead SOIC
PACKAGE
OPTION
MSOP-8
MSOP-8
SON-8
SON-8
SOIC-8
CROSS-
PRODUCT
DAC8811ICDGK
DAC8811IBDGK
DAC8811ICDRB
DAC8811IBDRD
N/A
INL (LSB)
±
1
±
2
±
1
±
2
±
2
DNL (LSB)
±
1
±
1
±
1
±
1
±
1
REFERENCE PART
N/A
AD5543BRM
N/A
N/A
AD5543BR
11
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