参数资料
| 型号： | LTC1446IN8 |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC D/A CONV 12BIT R-R DUAL 8-DIP |
| 标准包装： | 50 |
| 设置时间： | 14µs |
| 位数： | 12 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 输出数目和类型： | 2 电压，单极；2 电压，双极 |
| 采样率（每秒）： | * |
7
LTC1446/LTC1446L
Resolution (n)
Resolution is defined as the number of digital input bits,
n. It defines the number of DAC output states (2n) that
divide the full-scale range. The resolution does not imply
linearity.
Full-Scale Voltage (VFS)
This is the output of the DAC when all bits are set to one.
Voltage Offset Error (VOS)
The theoretical voltage at the output when the DAC is
loaded with all zeros. The output amplifier can have a true
negative offset, but because the part is operated from a
single supply, the output cannot go below zero. If the
offset is negative, the output will remain near 0V resulting
in the transfer curve shown in Figure 1.
Nominal LSBs:
LTC1446
LSB = 4.095V/4095 = 1mV
LTC1446L LSB = 2.5V/4095 = 0.610mV
Zero Scale Error (ZSE)
The output voltage when the DAC is loaded with all zeros.
Since this is a single supply part this value cannot be less
than 0V.
Integral Nonlinearity (INL)
End-point INL is the maximum deviation from a straight
line passing through the end points of the DAC transfer
curve. Because the part operates from a single supply and
the output cannot go below 0, the linearity is measured
between full scale and the code corresponding to the
maximum offset specification. The INL error at a given
input code is calculated as follows :
INL = [VOUT – VOS – (VFS – VOS)(Code/4095)]/LSB
VOUT= the output voltage of the DAC measured at the given
input code
Differential Nonlinearity (DNL)
DNL is the difference between the measured change and
the ideal 1LSB change between any two adjacent codes.
The DNL error between any two codes is calculated as
follows:
DNL = (
VOUT – LSB)/LSB
VOUT = The measured voltage difference between two
adjacent codes
Figure 1. Effect of Negative Offset
DAC CODE
1446/46L F01
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
0V
DEFI ITIO S
U
The offset of the part is measured at the code that corre-
sponds to the maximum offset specification:
VOS = VOUT – [(Code)(VFS)/(2n – 1)]
Least Significant Bit (LSB)
One LSB is the ideal voltage difference between two
successive codes.
LSB = (VFS – VOS)/(2n – 1) = (VFS – VOS)/4095
相关PDF资料 |
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相关代理商/技术参数 |
参数描述 |
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| LTC1446IN8#PBF | 功能描述:IC D/A CONV 12BIT R-R DUAL 8-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-uMAX 包装:管件 输出数目和类型:2 电压，单极 采样率（每秒）:* 产品目录页面:1398 (CN2011-ZH PDF) |
| LTC1446IS8 | 功能描述:IC D/A CONV 12BIT R-R DUAL 8SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| LTC1446IS8#PBF | 功能描述:IC D/A CONV 12BIT R-R DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:1 系列:- 设置时间:4.5µs 位数:12 数据接口:串行，SPI? 转换器数目:1 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOICN 包装:剪切带 (CT) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:* 其它名称:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| LTC1446IS8#TR | 功能描述:IC DAC 12BIT DUAL R-R MPWR 8SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| LTC1446IS8#TRPBF | 功能描述:IC D/A CONV 12BIT R-R DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
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