参数资料
| 型号： | AD872AJD |
| 厂商： | Analog Devices Inc |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 10MSPS 28-CDIP |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 10M |
| 数据接口： | 并联 |
| 转换器数目： | 7 |
| 功率耗散（最大）： | 1.3W |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-CDIP（0.605"，15.37mm） |
| 供应商设备封装： | 28-CDIP |
| 包装： | 管件 |
| 输入数目和类型： | 2 个单端，双极；1 个差分，双极 |
REV. A
–10–
AD872A
Figure 12 shows the common-mode rejection performance vs.
frequency for a 1 V p-p common-mode input. This excellent
common-mode rejection over a wide bandwidth affords the user
the opportunity to eliminate many potential sources of input
noise as common mode by using the differential input structure
of the AD872A.
INPUT FREQUENCY – Hz
–20
–30
–40
–50
–60
–70
–80
–90
–100
CMR
–
d
B
105
106
107
108
Figure 12. Common-Mode Rejection vs. Input Frequency,
1 V p-p Input
Figures 13 and 14 illustrate typical input connections for single-
ended inputs.
1
AD872A
VINA
VINB
2
1V
Figure 13. AD872A Single-Ended Input Connection
AD872A
VINA
VINB
1V
RT
2
1
Figure 14. AD872A Single-Ended Input Connection Using
a Shielded Cable
The cable shield is used as a ground connection for the VINB in-
put, providing the best possible rejection of the cable noise from
the input signal. Note also that the high input impedance of the
AD872A allows the user to select the termination impedance, be
it 50 ohms, or some other value. Furthermore, unlike many
flash converters, most AD872A applications will not require an
external buffer amplifier. If such an amplifier is required, we
suggest either the AD811 or AD9617.
Figure 15 illustrates how external amplifiers may be used to
convert a single-ended input into a differential signal. The resis-
tor values of 536
and 562 were selected to provide opti-
mum phase matching between U1 and U2.
VIN
( 0.5V)
U2
AD872A
562
536
VINA
VINB
U1
Figure 15. Single-Ended to Differential Connections; U1,
U2 = AD811 or AD9617
The use of the differential input signal can help to minimize
even-order distortion from the input THA where performance
beyond –70 dB is desired.
Figure 16 shows the AD872A large signal (–0.5 dB) and small
signal (–20 dB) frequency response.
INPUT FREQUENCY – Hz
10
0
–10
–20
–30
–40
–50
FUND
AMP
–
d
B
104
105
106
107
108
Figure 16. Full Power (–0.5 dB) and Small Signal
Response (–20 dB) vs. Input Frequency
The AD872A’s wide input bandwidth facilitates rapid acquisi-
tion of transient input signals: the input THA can typically settle
to 12-bit accuracy from a full-scale input step in less than 40 ns.
Figure 17 illustrates the typical acquisition of a full-scale input
step.
4500
4000
3500
3000
2500
2000
1500
1000
500
0
10
20
30
40
50
60
70
80
nsec
CODE
OUT
Figure 17. Typical AD872A Settling Time
OBSOLETE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD872AJE | 制造商:Rochester Electronics LLC 功能描述:IC, 12-BIT 10 MSPS ADC - Bulk |
| AD872ASD | 制造商:AD 制造商全称:Analog Devices 功能描述:Complete 12-Bit 10 MSPS Monolithic A/D Converter |
| AD872ASD/883B | 制造商:Analog Devices 功能描述:ADC Single Pipelined 10Msps 12-bit Parallel 28-Pin CDIP 制造商:Analog Devices 功能描述:ADC SGL PIPELINED 10MSPS 12-BIT PARALLEL 28CDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:IC, 12-BIT 10 MSPS ADC - Bulk 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| AD872ASE | 制造商:AD 制造商全称:Analog Devices 功能描述:Complete 12-Bit 10 MSPS Monolithic A/D Converter |
| AD872ASE/883B | 制造商:Analog Devices 功能描述:ADC Single Pipelined 10Msps 12-bit Parallel 44-Pin LCC 制造商:Rochester Electronics LLC 功能描述:IC, 12-BIT 10 MSPS ADC - Bulk |
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