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參數(shù)資料
| 型號： | ADS802E |
| 英文描述： | 12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 12位，10MHz的采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 283K |
| 代理商： | ADS802E |
13
ADS802
FIGURE 9. ADS802 Interface Schematic with AC-Coupling and External Buffers.
DYNAMIC PERFORMANCE TESTING
The ADS801 is a high performance converter and careful
attention to test techniques is necessary to achieve accurate
results. Highly accurate phase-locked signal sources allow
high resolution FFT measurements to be made without
using data windowing functions. A low jitter signal genera-
tor such as the HP8644A for the test signal, phase-locked
with a low jitter HP8022A pulse generator for the A/D
clock, gives excellent results. Low pass filtering (or bandpass
filtering) of test signals is absolutely necessary to test the
low distortion of the ADS801. Using a signal amplitude
slightly lower than full scale will allow a small amount of
“headroom” so that noise or DC offset voltage will not
overrange the A/D and cause clipping on signal peaks.
Sinewave Signal Power
Noise + Harmonic Power (first 15 harmonics)
DYNAMIC PERFORMANCE DEFINITIONS
1. Signal-to-Noise-and-Distortion Ratio (SINAD):
10 log
2. Signal-to-Noise Ratio (SNR):
Sinewave Signal Power
Noise Power
10 log
3. Intermodulation Distortion (IMD):
Highest IMD Product Power (to 5th-order)
Sinewave Signal Power
10 log
IMD is referenced to the larger of the test signals f
1
or f
2
.
Five “bins” either side of peak are used for calculation of
fundamental and harmonic power. The “0” frequency bin
(DC) is not included in these calculations as it is of little
importance in dynamic signal processing applications.
GND
LSB
MSB
GND
11
12
13
14
15
16
17
18
9
8
7
6
5
4
3
2
1
19
+V
S
CLK
+V
S
OE
MSBI
+V
S
REFB
CM
REFT
+V
S
GND
IN
IN
GND
15
16
17
18
19
20
21
22
23
24
25
26
27
28
14
13
12
11
10
9
8
7
6
5
4
3
2
1
ADS800
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
R
1
50
R
2
50
Ext
Clk
AC Input
Signal
11
12
13
14
15
16
17
18
9
8
7
6
5
4
3
2
Dir
G+
1
19
Dir
G+
IDT74FCT2245
IDT74FCT2245
Mini-Circuits
TT1-6-KK81
or equivalent
22pF
22pF
(1)
NOTE: (1) All capacitors should be located as close to the pins as the manufacturing
process will allow. Ceramic X7R surface-mount capacitors or equivalent are recommended.
+5V
FIGURE 8. Optional External Reference to Set the Full-Scale Range Utilizing a Dual, Single-Supply Op Amp.
2k
+2.5V to +3.25V
+5V
+5V
R
P
220
R
P
220
10k
6.2k
0.1
μ
F
+2.5V
10k
1/2
OPA2234
1/2
OPA2234
A
1
A
2
Bottom
Reference
Top
Reference
REF1004
+1.25V
10k
10k
*
10k
*
NOTE: (*) Use parts alternatively for adjustment capability.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS802U | 12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS803E | 12-Bit, 5MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS803U | REC3-SR_DR/H1 Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 12V; Power: 3W; Low Cost 3W converter in DIP24 Package; 1kVDC Isolation; Regulated Output; UL Approved; Continuous Short Circuit Protection; Internal SMD design; 3 Pinout Options, 3 Case Styles.; Efficiency to 75% |
| ADS804 | 12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS804E | 12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS802E/1K | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS802U | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 10 MSPS SE/Diff input RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS802U/1K | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 10MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS802UG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 10 MSPS SE/Diff input RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS803 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 5MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
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