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参数资料
| 型号： | DAC7644EB |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 8 us SETTLING TIME, 16-BIT DAC, PDSO48 |
| 封装： | SSOP-48 |
| 文件页数： | 14/21页 |
| 文件大小： | 349K |
| 代理商： | DAC7644EB |
21
DAC7644
Figure 15 shows a DAC7644 in a 4mA to 20mA current
output configuration. The output current can be determined
by Equation 3:
At full-scale, the output current is 16mA plus the 4mA for
the zero current. At zero scale the output current is the offset
current of 4mA (0.5V/125
).
(2)
(3)
DIGITALLY-PROGRAMMABLE
CURRENT SOURCE
The DAC7644 offers a unique set of features that allows a
wide range of flexibility in designing applications circuits
such as programmable current sources. The DAC7644 offers
both a differential reference input as well as an open-loop
configuration around the output amplifier. The open-loop
configuration around the output amplifier allows transistor
to be placed within the loop to implement a digitally-
programmable, uni-directional current source. The availabil-
ity of a differential reference also allows programmability
for both the full-scale and zero-scale currents. The output
current is calculated as:
NC
V
OUTA Sense
V
OUTA
V
REFL AB Sense
V
REFL AB
V
REFH AB
V
REFH AB Sense
V
OUTB Sense
V
OUTB
48
47
46
45
44
43
42
41
40
39
38
37
DAC7644
I
OUT
V
PROGRAMMED
125
80k
+0.5V
20k
+2.5V
+V
I
OUT
V
PROGRAMMED
125
GND
1000pF
2200pF
+V
OPA2350
100
1000pF
2200pF
100
FIGURE 15. 4-to-20mA Digitally Controlled Current Source (1/2 DAC7644).
I
VH
V
L
R
N Value
VL R
OUT
REF
SENSE
REF
SENSE
=
+
()
–
,
/
65 536
I
V
N Value
V
OUT =
+
25
05
125
65 536
05
125
.– .
,
.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC7644EB | 制造商:Texas Instruments 功能描述:IC 16BIT DAC 100KHZ SSOP48 制造商:Texas Instruments 功能描述:IC, 16BIT DAC, 100KHZ, SSOP48 制造商:Texas Instruments 功能描述:IC, 16BIT DAC, 100KHZ, SSOP48; Resolution (Bits):16bit; Sampling Rate:100kSPS; Input Channel Type:Parallel; Supply Voltage Range: 4.75V to 5.25V; Digital IC Case Style:SSOP; No. of Pins:48; Data Interface:Parallel; Supply ;RoHS Compliant: Yes |
| DAC7644EB/1K | 功能描述:数模转换器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DAC7644EB/1KG4 | 功能描述:数模转换器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DAC7644EBG4 | 功能描述:数模转换器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DAC7644EG4 | 功能描述:数模转换器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
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