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参数资料
| 型号： | AD7746ARUZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 23/28页 |
| 文件大小： | 0K |
| 描述： | IC CONV 2CH CAP TO DGTL 16-TSSOP |
| 设计资源： | Extending the Capacitive Input Range of AD7745/AD7746 (CN0129) |
| 标准包装： | 2,500 |
| 类型： | 电容数字转换器 |
| 分辨率（位）： | 24 b |
| 数据接口： | 串行 |
| 电压电源： | 单电源 |
| 电源电压： | 2.7 V ~ 5.25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 带卷 (TR) |
| 配用： | EVAL-AD7746EBZ-ND - BOARD EVALUATION FOR AD7746 |
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AD7745/AD7746
Rev. 0 | Page 4 of 28
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
Full-Scale Drift vs. Temperature
5
ppm of FS/°C
Internal reference
0.5
ppm of FS/°C
External reference
Average VIN Input Current
300
nA/V
Analog VIN Input Current Drift
±50
pA/V/°C
Power Supply Rejection
80
dB
Internal reference, VIN = VREF/2
Power Supply Rejection
90
dB
External reference, VIN = VREF/2
Normal Mode Rejection
75
dB
50 Hz ± 1%, conversion time = 122.1 ms
50
dB
60 Hz ± 1%, conversion time = 122.1 ms
Common-Mode Rejection
95
dB
VIN = 1 V
INTERNAL VOLTAGE REFERENCE
Voltage
1.169
1.17
1.171
V
TA = 25°C
Drift vs. Temperature
5
ppm/°C
EXTERNAL VOLTAGE REFERENCE INPUT
Differential REFIN Voltage2
0.1
2.5
VDD
V
Absolute REFIN Voltage2
GND 0.03
VDD + 0.03
V
Average REFIN Input Current
400
nA/V
Average REFIN Input Current Drift
±50
pA/V/°C
Common-Mode Rejection
80
dB
SERIAL INTERFACE LOGIC INPUTS
(SCL, SDA)
VIH Input High Voltage
2.1
V
VIL Input Low Voltage
0.8
V
Hysteresis
150
mV
Input Leakage Current (SCL)
±0.1
±1
A
OPEN-DRAIN OUTPUT (SDA)
VOL Output Low Voltage
0.4
V
ISINK =
6.0 mA
IOH Output High Leakage Current
0.1
1
A
VOUT = VDD
LOGIC OUTPUT (RDY)
VOL Output Low Voltage
0.4
V
ISINK = 1.6 mA, VDD = 5 V
VOH Output High Voltage
4.0
V
ISOURCE = 200 A, VDD = 5 V
VOL Output Low Voltage
0.4
V
ISINK = 100 A, VDD = 3 V
VOH Output High Voltage
VDD – 0.6
V
ISOURCE = 100 A, VDD = 3 V
POWER REQUIREMENTS
VDD-to-GND Voltage
4.75
5.25
V
VDD = 5 V, nominal
2.7
3.6
V
VDD = 3.3 V, nominal
IDD Current
850
A
Digital inputs equal to VDD or GND
750
A
VDD = 5 V
700
A
VDD = 3.3 V
IDD Current Power-Down Mode
0.5
2
A
Digital inputs equal to VDD or GND
1 Capacitance units: 1 pF = 10-12 F; 1 fF = 10-15 F; 1 aF = 10-18 F.
2 Specification is not production tested, but is supported by characterization data at initial product release.
3 Factory calibrated. The absolute error includes factory gain calibration error, integral nonlinearity error, and offset error after system offset calibration, all at 25°C. At
different temperatures, compensation for gain drift over temperature is required.
4 The capacitive input offset can be eliminated using a system offset calibration. The accuracy of the system offset calibration is limited by the offset calibration register
LSB size (32 aF) or by converter + system p-p noise during the system capacitive offset calibration, whichever is greater. To minimize the effect of the converter +
system noise, longer conversion times should be used for system capacitive offset calibration. The system capacitance offset calibration range is ±1 pF, the larger
offset can be removed using CAPDACs.
5 The gain error is factory calibrated at 25°C. At different temperatures, compensation for gain drift over temperature is required.
6 The CAPDAC resolution is seven bits in the actual CAPDAC full range. Using the on-chip offset calibration or adjusting the capacitive offset calibration register can
further reduce the CIN offset or the unchanging CIN component.
7 The VTCHOP bit in the VT SETUP register must be set to 1 for the specified temperature sensor and voltage input performance.
8 Using an external temperature sensing diode 2N3906, with nonideality factor nf = 1.008, connected as in Figure 41, with total serial resistance <100 .
9 Full-scale error applies to both positive and negative full scale.
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相关代理商/技术参数 |
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| AD7746ARUZ-REEL7 | 功能描述:IC CONV 2CH CAP TO DGTL 16-TSSOP 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: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 |
| AD7747 | 制造商:AD 制造商全称:Analog Devices 功能描述:24-Bit Capacitance-to-Digital Converter with Temperature Sensor |
| AD7747ARUZ | 功能描述:IC CONV 24BIT CAP-DGTL 16-TSSOP 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: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 |
| AD7747ARUZ-REEL | 功能描述:IC CONV CAP TO DIG 24BIT 16TSSOP 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: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 |
| AD7747ARUZ-REEL7 | 功能描述:IC CONV CAP TO DIG 24BIT 16TSSOP 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: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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