VIN 2V p-p 47pF 600 V
參數(shù)資料
型號: AD8651ARZ-REEL
廠商: Analog Devices Inc
文件頁數(shù): 9/20頁
文件大?。?/td> 0K
描述: IC OPAMP VF CMOS 50MHZ LN 8SOIC
標準包裝: 2,500
系列: DigiTrim®
放大器類型: 電壓反饋
電路數(shù): 1
輸出類型: 滿擺幅
轉換速率: 41 V/µs
增益帶寬積: 50MHz
電流 - 輸入偏壓: 1pA
電壓 - 輸入偏移: 100µV
電流 - 電源: 9.5mA
電流 - 輸出 / 通道: 40mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 5.5 V,±1.35 V ~ 2.75 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SO
包裝: 帶卷 (TR)
Data Sheet
AD8651/AD8652
Rev. D | Page 17 of 20
VIN
2V p-p
47pF
600
VOUT
+3.5V
–1.5V
03301-
058
+
AD865x
Figure 59. THD + N Test Circuit
Driving a 16-Bit ADC
The AD865x family is an excellent choice for driving high
speed, high precision ADCs. The driver amplifier for this type
of application needs low THD + N as well as quick settling time.
Figure 61 shows a complete single-supply data acquisition
solution. The AD865x family drives the AD7685, a 250 kSPS,
16-bit data converter.1
The AD865x is configured in an inverting gain of 1 with a 5 V
single supply. Input of 45 kHz is applied, and the ADC samples
at 250 kSPS. The results of this solution are listed in Table 6.
The advantage of this circuit is that the amplifier and ADC can
be powered with the same power supply. For the case of
a noninverting gain of 1, the input common-mode voltage
encompasses both supplies.
1
For more information about the AD7685 data converter, go to
fSAMPLE = 250kSPS
fIN = 45kHz
INPUT RANGE = 0V TO 5V
FREQUENCY (kHz)
A
M
P
LITU
D
E
(
dB
of
Full
S
c
a
le
)
0
–160
–100
–120
–140
–80
–60
–40
–20
0
10
20
30 40
50
60
70
80
90
100 110 120
03301-
059
Figure 60. Frequency Response of AD865x Driving a 16-Bit ADC
1F
3
2
U1
IN
2.7nF
33
VCC
5V
1k
10k
10k
1k
AD7685
VIN
0V TO 5V
fIN = 45kHz
03301-
060
+
AD865x
V+
V
Figure 61. AD865x Driving a 16-Bit ADC
Table 6. Data Acquisition Solution of Figure 60
Parameter
Reading (dB)
THD + N
105.2
SFDR
106.6
2nd Harmonics
107.7
3rd Harmonics
113.6
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