参数资料
型号: DAC8830IBD
厂商: TEXAS INSTRUMENTS INC
元件分类: DAC
英文描述: SERIAL INPUT LOADING, 1 us SETTLING TIME, 16-BIT DAC, PDSO8
封装: GREEN, PLASTIC, SOIC-8
文件页数: 9/29页
文件大小: 687K
代理商: DAC8830IBD
www.ti.com
APPLICATION INFORMATION
Unipolar Output Operation
DAC
DAC8830
SDI
SCLK
CS
DGND
V
OUT
0.1
F
V
O = 0 to +VREF
AGND
S
e
ri
a
l
In
te
rf
a
c
e
Input
Register
DAC Latch
V
DD
V
REF
+5 V
+2.5 V
OPA277
OPA704
OPA727
+
0.1
F
10
F
SLAS449D – FEBRUARY 2005 – REVISED SEPTEMBER 2007
These DACs are capable of driving unbuffered loads of 60 k
. Unbuffered operation results in low supply current
(typically 5
μA) and a low offset error. The DAC8830 provides a unipolar output swing ranging from 0 V to VREF.
The DAC8831 can be configured to output both unipolar and bipolar voltages. Figure 45 and Figure 46 show a
typical unipolar output voltage circuit for each device, respectively. The code table for this mode of operation is
shown in Table 1.
Table 1. Unipolar Code
DAC LATCH CONTENTS
MSB
LSB
ANALOG OUTPUT
1111 1111 1111 1111
VREF × (65,535/65,536)
1000 0000 0000 0000
VREF × (32,768/65,536) = 1/2 VREF
0000 0000 0000 0001
VREF × (1/65,536)
0000 0000 0000 0000
0 V
Figure 45. Unipolar Output Mode of DAC8830
Copyright 2005–2007, Texas Instruments Incorporated
17
Product Folder Link(s): DAC8830 DAC8831
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