参数资料
| 型号： | AD974ANZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC DAS 16BIT 4CH 200KSPS 28DIP |
| 标准包装： | 13 |
| 类型： | 数据采集系统（DAS） |
| 分辨率（位）： | 16 b |
| 采样率（每秒）： | 200k |
| 数据接口： | 串行 |
| 电压电源： | 模拟和数字 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 28-PDIP |
| 包装： | 管件 |
| 配用： | EVAL-AD974CB-ND - BOARD EVAL FOR AD974 |
REV. A
AD974
–13–
Table I. Analog Input Configuration
Input Voltage
Connect
Input
Range
VxA to
VxB to
Impedance
±10 V
BIP
VIN
13.7 k
0 V to +5 V
VIN
GND
6.0 k
0 V to +4 V
VIN
6.4 k
Table II. Output Codes and Ideal Input Voltage
Digital Input
Description
Analog Input
Straight Binary
Full-Scale Range
±10 V
0 V to +5 V
0 V to +4 V
Least Significant Bit
305
V
76
V
61
V
+Full Scale (FS – 1 LSB)
+9.999695 V
+4.999847 V
+3.999939 V
1111 1111 1111 1111
Midscale
0 V
+2.5 V
+2 V
1000 0000 0000 0000
One LSB Below Midscale
–305
V
+2.499924 V
+1.999939 V
0111 1111 1111 1111
–Full Scale
–10 V
0 V
0000 0000 0000 0000
ANALOG INPUTS
The AD974 is specified to operate with three full-scale analog
input ranges. Connections required for each of the eight analog
inputs, VxA and VxB and the resulting full-scale ranges, are
shown in Table I. The nominal input impedance for each ana-
log input range is also shown. Table II shows the output codes
for the ideal input voltages of each of the analog input ranges.
The analog input section has a
±25 V overvoltage protection on
VxA and VxB. Since the AD974 has two analog grounds it is
important to ensure that the analog input is referenced to the
AGND1 pin, the low current ground. This will minimize any
problems associated with a resistive ground drop. It is also
important to ensure that the analog inputs are driven by a low
impedance source. With its primarily resistive analog input
circuitry, the ADC can be driven by a wide selection of general
purpose amplifiers.
To achieve the low distortion capability of the AD974 care
should be taken in the selection of the drive circuitry
op amp.
Figure 10 shows the simplified analog input section for the
AD974. Since the AD974 can operate with an internal or exter-
nal reference, and three different analog input ranges, the full-
scale analog input range is best represented with a voltage that
spans 0 V to VREF across the 40 pF sampling capacitor. The on-
chip resistors are laser trimmed to ratio match for adjustment of
offset and full-scale error using fixed external resistors.
BIP
AGND1
REF
CAP
VxA
VxB
AGND2
3k
12k
4k
SWITCHED
CAP ADC
2.5V
REFERENCE
4k
40pF
AD974
Figure 10. Simplified Analog Input
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD974AR | 功能描述:IC DAS 16BIT 4CH 200KSPS 28-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD974ARS | 制造商:Analog Devices 功能描述:ADC Single 200ksps 16-bit Serial 28-Pin SSOP 制造商:Rochester Electronics LLC 功能描述:4-CHANNEL 16 BIT 200KSPS DATA ACQ SYSTEM - Bulk |
| AD974ARSZ | 功能描述:IC DAS 16BIT 4CH 200KSPS 28-SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Data Converter Basics 标准包装:1 系列:- 类型:电机控制 分辨率（位）:12 b 采样率（每秒）:1M 数据接口:串行，并联 电压电源:单电源 电源电压:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:100-TQFP 供应商设备封装:100-TQFP（14x14） 包装:剪切带 (CT) 其它名称:296-18373-1 |
| AD974ARZ | 功能描述:IC DAS 16BIT 4CH 200KSPS 28-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Data Converter Basics 标准包装:1 系列:- 类型:电机控制 分辨率（位）:12 b 采样率（每秒）:1M 数据接口:串行，并联 电压电源:单电源 电源电压:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:100-TQFP 供应商设备封装:100-TQFP（14x14） 包装:剪切带 (CT) 其它名称:296-18373-1 |
| AD974BN | 功能描述:IC DAS 16BIT 4CH 200KSPS 28-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
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