參數(shù)資料
型號: AD8002AR
廠商: Analog Devices Inc
文件頁數(shù): 5/21頁
文件大小: 0K
描述: IC OPAMP CF DUAL LP LDIST 8SOIC
標(biāo)準(zhǔn)包裝: 98
放大器類型: 電流反饋
電路數(shù): 2
轉(zhuǎn)換速率: 1200 V/µs
-3db帶寬: 600MHz
電流 - 輸入偏壓: 5µA
電壓 - 輸入偏移: 2000µV
電流 - 電源: 10mA
電流 - 輸出 / 通道: 70mA
電壓 - 電源,單路/雙路(±): ±3 V ~ 6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 管件
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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