- 您现在的位置：买卖IC网 > PDF目录1984 > AD7864BSZ-1REEL (Analog Devices Inc)IC ADC 12BIT DUAL 4CHAN 44-MQFP PDF资料下载
参数资料
| 型号： | AD7864BSZ-1REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT DUAL 4CHAN 44-MQFP |
| 标准包装： | 800 |
| 位数： | 12 |
| 采样率（每秒）： | 520k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 120mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 4 个差分，双极 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
AD7864
Rev. D | Page 22 of 28
terms include (fa + fb) and (fa fb), whereas the third-order
terms include (2fa + fb), (2fa fb), (fa + 2fb), and (fa 2fb).
Using the CCIF standard where two input frequencies near the
top end of the input bandwidth are used, the second- and third-
order terms are of different significance. The second-order
terms are usually distanced in frequency from the original sine
waves, whereas the third-order terms are usually at a frequency
close to the input frequencies. As a result, the second- and
third-order terms are specified separately. The calculation of the
intermodulation distortion is as per the THD specification
where it is the ratio of the rms sum of the individual distortion
products to the rms amplitude of the fundamental expressed in
decibels. In this case, the input consists of two, equal amplitude,
low distortion sine waves. Figure 19 shows a typical IMD plot
for the AD7864.
010
20
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
FREQUENCY (kHz)
(dB
)
40
60
50
AD7864-1 @ 25°C
5V SUPPLY
SAMPLING AT 131072Hz
INPUT FREQUENCY OF
48,928Hz AND 50,016Hz
4096 SAMPLES TAKEN
0
13
41
-01
9
Figure 19. IMD Plot
AC LINEARITY PLOTS
and INL plots for the AD7864.
0
500
1000
1500
2000
2500
3000
3500
ADC CODE
3
2
1
0
–1
–2
–3
DN
L
(
L
S
B)
4000
01
34
1-
02
0
Figure 20. Typical DNL Plot
–0.5
0
0.5
1.0
1.5
2.0
2.5
–2.5
–2.0
–1.5
–1.0
0
500
1000
1500
2000
2500
3000
3500
4000
ADC CODE
IN
L
(
L
S
B
)
0
13
41
-02
1
Figure 21. Typical INL Plot
MEASURING APERTURE JITTER
A convenient way to measure aperture jitter is to use the
relationship it is known to have with SNR (signal-to-noise plus
distortion) given as follows:
(
)
×
=
σ
f
π
SNR
IN
JITTER
2
1
log
20
10
(3)
where:
SNRJITTER is the signal-to-noise due to the rms time jitter.
σ is the rms time jitter.
fIN is the sinusoidal input frequency (1 MHz in this case).
Equation 3 demonstrates that the signal-to-noise ratio due to
jitter degrades significantly with frequency. At low input fre-
quencies, the measured SNR performance of the AD7864 is
indicative of noise performance due to quantization noise and
system noise only (72 dB used as a typical figure in this example).
Therefore, by measuring the overall SNR performance
(including noise due to jitter, system, and quantization) of the
AD7864, a good estimation of the jitter performance of the
AD7864 can be calculated.
FREQUENCY (Hz)
12
11
5
9
8
7
6
10
EN
O
B
900k
950k
1.00M
1.05M
1.10M
01
34
1-
02
2
Figure 22. ENOB of the AD7864 at 1 MHz
相关PDF资料 |
PDF描述 |
|---|---|
| AD7865YSZ-3 | IC ADC 14BIT 4CHAN 5V 44-MQFP |
| AD7866ARU-REEL7 | IC ADC 12BIT 2CH DUAL 20TSSOP |
| AD7871KP | IC ADC 14BIT SAMPLING 28-PLCC |
| AD7873ARUZ | IC ADC 12BIT TOUCHSCREEN 16TSSOP |
| AD7875LNZ | IC ADC 12BIT SAMPLING 5V 24-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7864BSZ-1REEL2 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, Simultaneous Sampling, High Speed, 12-Bit ADC |
| AD7865 | 制造商:AD 制造商全称:Analog Devices 功能描述:Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC |
| AD7865AS-1 | 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi |
| AD7865AS-1REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Tape and Reel |
| AD7865AS2 | 制造商:AD 功能描述:* |
发布紧急采购，3分钟左右您将得到回复。