- 您现在的位置：买卖IC网 > PDF目录373895 > AD7245ABN (ANALOG DEVICES INC) LC2MOS 12-Bit DACPORTs PDF资料下载
参数资料
| 型号： | AD7245ABN |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | DAC |
| 英文描述： | LC2MOS 12-Bit DACPORTs |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 7 us SETTLING TIME, 12-BIT DAC, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 4/16页 |
| 文件大小： | 306K |
| 代理商： | AD7245ABN |
AD7245A/AD7248A
REV. A
–4–
DAC GAIN E RROR
DAC Gain Error is a measure of the output error between an
ideal DAC and the actual device output with all 1s loaded after
offset error has been allowed for. It is, therefore defined as:
Measured Value—Offset—Ideal Value
where the ideal value is calculated relative to the actual refer-
ence value.
UNIPOLAR OFFSE T E RROR
Unipolar Offset Error is a combination of the offset errors of the
voltage mode DAC and the output amplifier and is measured
when the part is configured for unipolar outputs. It is present
for all codes and is measured with all 0s in the DAC register.
BIPOLAR ZE RO OFFSE T E RROR
Bipolar Zero Offset Error is measured when the part is config-
ured for bipolar output and is a combination of errors from the
DAC and output amplifier. It is present for all codes and is
measured with a code of 2048 (decimal) in the DAC register.
SINGLE SUPPLY LINE ARIT Y AND GAIN E RROR
T he output amplifier of the AD7245A/AD7248A can have a
true negative offset even when the part is operated from a single
positive power supply. However, because the lower supply rail
to the part is 0 V, the output voltage cannot actually go nega-
tive. Instead the output voltage sits on the lower rail and this re-
sults in the transfer function shown. T his is an offset effect and
the transfer function would have followed the dotted line if the
output voltage could have gone negative. Normally, linearity is
measured after offset and full scale have been adjusted or al-
lowed for. On the AD7245A/AD7248A the negative offset is al-
lowed for by calculating the linearity from the code which the
amplifier comes off the lower rail. T his code is given by the
negative offset specification. For example, the single supply lin-
earity specification applies between Code 3 and Code 4095 for
the 25
°
C specification and between Code 5 and Code 4095 over
the T
MIN
to T
MAX
temperature range. Since gain
error is also
measured after offset has been allowed for, it is calculated between
the same codes as the linearity error. Bipolar linearity and gain er-
ror are measured between Code 0 and Code 4095.
OUTPUT
VOLTAGE
NEGATIVE
OFFSET
DAC CODE
0V
{
T E RMINOLOGY
RE LAT IVE ACCURACY
Relative Accuracy, or end-point nonlinearity, is a measure of the
actual deviation from a straight line passing through the end-
points of the DAC transfer function. It is measured after allow-
ing for zero and full scale and is normally expressed in LSBs or
as a percentage of full-scale reading.
DIFFE RE NT IAL NONLINE ARIT Y
Differential Nonlinearity is the difference between the measured
change and the ideal 1 LSB change between any two adjacent
codes. A specified differential nonlinearity of
±
1 LSB max over
the operating temperature range ensures monotonicity.
DIGIT AL FE E DT HROUGH
Digital Feedthrough is the glitch impulse injected from the digi-
tal inputs to the analog output when the inputs change state. It
is measured with
LDAC
high and is specified in nV-s.
AD7245A ORDE RING GUIDE
T emperature
Range
Relative
Accuracy
Package
Option
2
Model
l
AD7245AAN
AD7245ABN
AD7245AAQ
AD7245AT Q
3
AD7245AAP
AD7245AAR
AD7245ABR
AD7245AT E
3
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
±
3/4 LSB
±
1/2 LSB
±
3/4 LSB
±
3/4 LSB
±
3/4 LSB
±
3/4 LSB
±
1/2 LSB
±
3/4 LSB
N-24
N-24
Q-24
Q-24
P-28A
R-24
R-24
E-28A
NOT ES
1
T o order MIL-ST D-883, Class B. processed parts, add /883B to part number.
Contact our local sales office for military data sheet and availability.
2
E = Leadless Ceramic Chip Carrier; N = Plastic DIP; P = Plastic Leaded Chip
Carrier; Q = Cerdip; R = SOIC.
3
T his grade will be available to /883B processing only.
AD7248A ORDE RING GUIDE
T emperature
Range
Relative
Accuracy
Package
Option
2
Model
l
AD7248AAN
AD7248ABN
AD7248AAQ
AD7248AT Q
3
AD7248AAP
AD7248AAR
AD7248ABR
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
±
3/4 LSB
±
1/2 LSB
±
3/4 LSB
±
3/4 LSB
±
3/4 LSB
±
3/4 LSB
±
1/2 LSB
N-20
N-20
Q-20
Q-20
P-20A
R-20
R-20
NOT ES
1
T o order MIL-ST D-883, Class B, processed parts, add /883B to part number.
Contact our local sales office for military data sheet and availability.
2
N = Plastic DIP; P = Plastic Leaded Chip Carrier; Q = Cerdip; R = SOIC.
3
T his grade will be available to /883B processing only.
相关PDF资料 |
PDF描述 |
|---|---|
| AD7245ABR | LC2MOS 12-Bit DACPORTs |
| AD7245ATE | LC2MOS 12-Bit DACPORTs |
| AD7245ATQ | LC2MOS 12-Bit DACPORTs |
| AD7248AAN | LC2MOS 12-Bit DACPORTs |
| AD7248AAP | LC2MOS 12-Bit DACPORTs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7245ABNZ | 功能描述:IC DAC 12BIT W/REF 24DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 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 |
| AD7245ABR | 功能描述:IC DAC 12BIT W/REF 24-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
| AD7245ABR-REEL | 制造商:Analog Devices 功能描述:DAC 1CH R-2R 12-BIT 24SOIC W - Tape and Reel |
| AD7245ABRZ | 功能描述:IC DAC 12BIT W/REF 24-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 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 |
| AD7245ABRZ-REEL | 功能描述:IC DAC 12BIT W/REF 24-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
发布紧急采购，3分钟左右您将得到回复。