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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： | 7/21页 |
| 文件大小： | 349K |
| 代理商： | DAC7644EB |
15
DAC7644
THEORY OF OPERATION
The DAC7644 is a quad voltage output, 16-bit digital-to-
analog converter (DAC). The architecture is an R-2R ladder
configuration with the three MSB’s segmented followed by
an operational amplifier that serves as a buffer. Each DAC
has its own R-2R ladder network, segmented MSBs and
output op amp (see Figure 1). The minimum voltage output
(zero-scale) and maximum voltage output (full-scale) are set
by the external voltage references (VREFL and VREFH, re-
spectively). The digital input is a 16-bit parallel word and
the DAC input registers offer a readback capability. The
converters can be powered from either a single +5V supply
or a dual
±5V supply. The device offers a reset function
which immediately sets all DAC output voltages and DAC
registers to mid-scale code 8000H or to zero-scale, code
0000H. See Figures 2 and 3 for the basic operation of the
DAC7644.
FIGURE 1. DAC7644 Architecture.
FIGURE 2. Basic Single-Supply Operation of the DAC7644.
R
2R
V
REFH
V
OUT
V
OUT Sense
V
REFH Sense
V
REFL
V
REFL Sense
R
F
DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
RSTSEL
RST
LOADDACS
R/W
A1
A0
CS
DGND
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
V
OUTC Sense
V
OUTC
V
REFH CD Sense
V
REFH CD
V
REFL CD
V
REFL CD Sense
V
OUTD Sense
V
OUTD
V
SS
AGND
V
CC
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
DAC7644
Reset DACs
Data
Bus
Address
Load DAC Registers
READ/WRITE
Chips Select
NC = No Connection
0V to +2.5V
+2.5000V
+5V
0.1
F
1
F
+
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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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