参数资料
| 型号： | AD8002ARZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 5/21页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CF DUAL LP LDIST 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 电流反馈 |
| 电路数： | 2 |
| 转换速率： | 1200 V/µs |
| -3db带宽： | 600MHz |
| 电流 - 输入偏压： | 5µA |
| 电压 - 输入偏移： | 2000µV |
| 电流 - 电源： | 10mA |
| 电流 - 输出 / 通道： | 70mA |
| 电压 - 电源，单路/双路(±)： | ±3 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
REV. D
AD8002
–12–
Driving A-to-D Converters
The AD8002 is well suited for driving high-speed analog-to-
digital converters such as the AD9058. The AD9058 is a dual
8-bit 50 MSPS ADC. In Figure 10, the AD8002 is shown driv-
ing the inputs of the AD9058 which are configured for 0 V to 2 V
ranges. Bipolar input signals are buffered, amplified (–2
×), and
offset (by 1.0 V) into the proper input range of the ADC. Using
0.1 F
+VS
–VS
20
50
1k
18
17
16
15
14
13
12
11
–VREF A
10pF
CLOCK
5, 9, 22,
24, 37, 41
4,19, 21
25, 27, 42
0.1 F
38
8
–VREF B
6
+VINT
2
3
+VREF A
AIN A
549
274
ANALOG
IN A
0.5V
1.1k
AD707
43
+VREF B
20k
0.1 F
–2V
1.1k
20k
549
ANALOG
IN B
0.5V
274
20
0.1 F
40
COMP
1
AIN B
ENCODE A
ENCODE B
10
36
ENCODE
74ACT04
0.1 F
+5V
28
29
30
31
32
33
34
35
RZ1
RZ2
D0A (LSB)
D7A (MSB)
D0B (LSB)
D7B (MSB)
7, 20,
26, 39
–5V
1N4001
AD9058
(J-LEAD)
RZ1, RZ2 = 2,000
SIP (8-PKG)
74ACT
273
74ACT
273
8
1/2
AD8002
1/2
AD8002
50
Figure 10. AD8002 Driving a Dual A-to-D Converter
the AD9058’s internal 2 V reference connected to both ADCs
as shown in Figure 10 reduces the number of external compo-
nents required to create a complete data acquisition system. The
20
resistors in series with ADC inputs are used to help the
AD8002s drive the 10 pF ADC input capacitance. The AD8002
adds only 100 mW to the power consumption, while not limit-
ing the performance of the circuit.
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