参数资料
型号: DC752A-B
厂商: Linear Technology
文件页数: 4/22页
文件大小: 0K
描述: BOARD DAC LTC2704-16
软件下载: QuikEval System
设计资源: DC752A Design File
DC752A Schematic
标准包装: 1
系列: QuikEval™, SoftSpan™
DAC 的数量: 4
位数: 16
数据接口: 串行,SPI?
设置时间: 10µs
DAC 型: 电压
已供物品:
已用 IC / 零件: LTC2704-16
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LTC2704
12
2704fd
OUTPUT RANGES
The LTC2704 is a quad DAC with software-programmable
output ranges. SoftSpan provides two unipolar output
ranges (0V to 5V and 0V to 10V), and four bipolar ranges
(±2.5V, ±5V, ±10V and – 2.5V to 7.5V). These ranges are
obtained when an external precision 5V reference and
analog supplies of ±12V to ±15V are used. When a refer-
ence voltage of 2V and analog supplies of ±5V are used,
the SoftSpan ranges become: 0V to 2V, 0V to 4V, ±1V, ±2V,
±4V and –1V to 3V. The output ranges are linearly scaled
for references other than 2V and 5V (appropriate analog
supplies should be used within the range ±5V to ±15V).
Each of the four DACs can be programmed to any one of
the six output ranges. DAC outputs can swing to ±10V
on ±10.8V supplies (±12V supplies with ±10% tolerance)
while sourcing or sinking 5mA of load current.
OPERATION
Table 1. Command Codes
CODE
READBACK POINTER—
C3
C2
C1
C0
COMMAND
CURRENT INPUT WORD WO
NEXT INPUT WORD W+1
0
1
0
Write to B1 Span DAC n
Set by Previous Command
B1 Span DAC n
0
1
Write to B1 Code DAC n
Set by Previous Command
B1 Code DAC n
0
1
0
Update B1→B2 DAC n
Set by Previous Command
B2 Span DAC n
0
1
0
1
Update B1→B2 All DACs
Set by Previous Command
B2 Code DAC n
0
1
0
Write to B1 Span DAC n
Update B1→B2 DAC n
Set by Previous Command
B2 Span DAC n
0
1
Write to B1 Code DAC n
Update B1→B2 DAC n
Set by Previous Command
B2 Code DAC n
1
0
Write to B1 Span DAC n
Update B1→B2 All DACs
Set by Previous Command
B2 Span DAC n
1
0
1
Write to B1 Code DAC n
Update B1→B2 All DACs
Set by Previous Command
B2 Code DAC n
1
0
1
0
Read B1 Span DAC n
B1 Span DAC n
1
0
1
Read B1 Code DAC n
B1 Code DAC n
1
0
Read B2 Span DAC n
B2 Span DAC n
1
0
1
Read B2 Code DAC n
B2 Code DAC n
1
0
Sleep DAC n (Note 1)
Set by Previous Command
B2 Span DAC n
1
No Operation
Set by Previous Command
B2 Code DAC n
Codes not shown are reserved and should not be used.
Note 1: Normal operation can be resumed by issuing any update B1→B2 command to the sleeping DAC.
Table 2. Address Codes
A3
A2
A1
A0
n
READBACK POINTER n
0
DAC A
0
1
0
DAC B
0
1
0
DAC C
0
1
0
DAC D
1
All DACs
DAC A
Codes not shown are reserved and should not be used.
Table 3. Span Codes
S3
S2
S1
S0
SPAN
0
Unipolar 0V to 5V
0
1
Unipolar 0V to 10V
0
1
0
Bipolar –5V to 5V
0
1
Bipolar –10V to 10V
0
1
0
Bipolar –2.5V to 2.5V
0
1
0
1
Bipolar –2.5V to 7.5V
Codes not shown are reserved and should not be used.
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