參數(shù)資料
型號(hào)： DAC8832IBRGY
廠商： Texas Instruments, Inc.
英文描述： 16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter
中文描述： 16位，超低功耗，電壓輸出數(shù)字模擬轉(zhuǎn)換器
文件頁(yè)數(shù)： 18/26頁(yè)
文件大?。?/td> 702K
代理商： DAC8832IBRGY
www.ti.com
BIPOLAR OUTPUT OPERATION
With the aid of an external operational amplifier, the DAC8832 may be configured to provide a bipolar voltage
output. A typical circuit of such an operation is shown in
Figure 45
. The matched bipolar offset resistors R
FB
and
R
INV
are connected to an external operational amplifier to achieve this bipolar output swing; typically, R
FB
= R
INV
= 28 k
.
0.1
μ
F
V
DD
+5 V
RFB
INV
AGNDF
AGNDS
DAC
DAC Latch
Input
Register
DAC8832
+V
V
SDI
SCLK
LDAC
V
OUT
R
INV
R
FB
V
REF
S
V
REF
F
S
a
CS
+2.5 V
+
0.1
μ
F
10
μ
F
DGND
V
O
=
V
REF
to +V
REF
OPA277
OPA704
OPA727
V
OUT_BIP
V
OUT_UNI
V
OS
(2
RD)
V
REF
(1
RD)
1
2
RD
A
DAC8832
SBAS380A–FEBRUARY 2006–REVISED APRIL 2006
Figure 45. Bipolar Output Mode
Table 2
shows the transfer function for this output operating mode. The DAC8832 also provides a set of Kelvin
connections to the analog ground and external reference inputs.
Table 2. Bipolar Code
DAC LATCH CONTENTS
MSB
1111 1111 1111 1111
1000 0000 0000 0001
1000 0000 0000 0000
0111 1111 1111 1111
0000 0000 0000 0000
LSB
ANALOG OUTPUT
+V
REF
× (32,767/32,768)
+V
REF
× (1/32,768)
0V
–V
REF
× (1/32,768)
–V
REF
× (32,768/32,768) = –V
REF
Assuming a perfect reference, the worst-case output voltage may be calculated from the following equation:
Bipolar Mode Worst-Case Output:
Where:
V
OS
= External operational amplifier input offset voltage
RD = R
FB
and R
IN
resistor matching error
A = Operational amplifier open-loop gain
18
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DAC8832IBRGYRG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output 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
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DAC8832ICRGY 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter
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