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ADS7817 参数 Datasheet PDF下载

ADS7817图片预览
型号: ADS7817
PDF下载: 下载PDF文件 查看货源
内容描述: 12位差分输入微功耗采样模拟数字转换器 [12-Bit Differential Input Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER]
分类和应用: 转换器
文件页数/大小: 15 页 / 174 K
品牌: BB [ BURR-BROWN CORPORATION ]
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SPECIFICATIONS  
At –40°C to +85°C, +VCC = +5V, VREF = +2.5V, fSAMPLE = 200kHz, fCLK = 16 • fSAMPLE, –In = +2.5V, unless otherwise specified.  
ADS7817  
TYP  
ADS7817B  
TYP  
ADS7817C  
TYP  
PARAMETER  
CONDITIONS  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
UNITS  
ANALOG INPUT  
Full-Scale Input Span  
Absolute Input Voltage  
+In – (–In)  
+In  
–VREF  
–0.3  
–0.3  
+VREF  
VCC +0.3  
4
V
V
V
–In  
Capacitance  
Leakage Current  
15  
±1  
pF  
µA  
SYSTEM PERFORMANCE  
Resolution  
No Missing Codes  
Integral Linearity Error  
Differential Linearity Error  
Offset Error  
Gain Error  
Noise  
Common-Mode Rejection  
Power Supply Rejection  
12  
Bits  
Bits  
11  
12  
±1  
±1  
±1  
±0.5  
63  
80  
±2  
±2  
±6  
±4  
±0.8  
±0.7  
±2  
±1  
±0.5  
±0.4  
±1  
±1  
LSB(1)  
LSB  
LSB  
LSB  
µVrms  
dB  
82  
dB  
SAMPLING DYNAMICS  
Conversion Time  
Acquisition Time  
12  
Clk Cycles  
Clk Cycles  
kHz  
1.5  
Throughput Rate  
200  
DYNAMIC CHARACTERISTICS  
Total Harmonic Distortion  
VIN = 5.0Vp-p at 1kHz  
VIN = 5.0Vp-p at 5kHz  
VIN = 5.0Vp-p at 1kHz  
VIN = 5.0Vp-p at 1kHz  
–83  
–81  
71  
dB  
dB  
dB  
dB  
SINAD  
Spurious Free Dynamic Range  
86  
REFERENCE INPUT  
Voltage Range  
Resistance  
0.1  
2.5  
V
CS = VCC  
CS = GND, fSAMPLE = 0Hz  
At Code FF8h  
5
5
20  
1.3  
0.001  
GΩ  
GΩ  
µA  
µA  
µA  
Current Drain  
100  
20  
3
fSAMPLE = 12.5kHz  
CS = VCC  
DIGITAL INPUT/OUTPUT  
Logic Family  
Logic Levels:  
VIH  
VIL  
VOH  
CMOS  
IIH = +5µA  
IIL = +5µA  
IOH = –250µA  
IOL = 250µA  
3
–0.3  
3.5  
+VCC +0.  
0.8  
3
V
V
V
V
VOL  
Data Format  
0.4  
Binary Two’s Complement  
POWER SUPPLY REQUIREMENTS  
VCC  
Specified Performance  
4.75  
5.25  
800  
V
Quiescent Current  
460  
40  
330  
µA  
µA  
µA  
µA  
fSAMPLE = 12.5kHz(2, 3)  
fSAMPLE = 12.5kHz(3)  
CS =VCC, fSAMPLE = 0Hz  
Power Down  
3
TEMPERATURE RANGE  
Specified Performance  
–40  
+85  
°C  
Specifications same as ADS7817.  
NOTE: (1) LSB means Least Significant Bit, with VREF equal to +2.5V, one LSB is 1.22mV. (2) fCLK = 3.2MHz, CS = VCC for 241 clock cycles out of every 256.  
(3) See the Power Dissipation section for more information regarding lower sample rates.  
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN  
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject  
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not  
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.  
®
ADS7817  
2