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參數資料
型號: AD8028
廠商: Analog Devices, Inc.
元件分類: 運動控制電子
英文描述: Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
中文描述: 低失真,高速軌到軌輸入/輸出放大器
文件頁數: 20/24頁
文件大小: 478K
代理商: AD8028
AD8027/AD8028
APPLICATIONS
Using the AD8027/AD8028 SELECT Pin
Rev. B | Page 20 of 24
The AD8027/AD8028 features a unique SELECT pin with two
functions. The first is a power-down function that places the
AD8027/AD8028 into low power consumption mode. In the
power-down mode, the amplifier draws 450 μA (typ) of supply
current.
The second function, as mentioned in the Theory of Operation
section, shifts the crossover point (where the NPN/PNP input
differential pairs transition from one to the other) closer to
either the positive supply rail or the negative supply rail. This
selectable crossover point allows the user to minimize
distortion based on the input signal and environment. The
default state is 1.2 V from the positive power supply, with the
SELECT pin left floating or in tri-state.
Table 6 shows the required voltages and modes of the
SELECT pin.
Table 6. SELECT Pin Mode Control
SELECT Pin Voltage (V)
V
S
= ±5 V
–5 to –4.2
–4.2 to –3.3
Mode
Disable
Crossover Referenced
–1.2 V to Positive Supply
Crossover Referenced
+1.2 V to Negative Supply
V
S
= +5 V
0 to 0.8
0.8 to 1.7
V
S
= +3 V
0 to 0.8
0.8 to 1.7
–3.3 to +5
1.7 to 5.0
1.7 to 3.0
When the input stage transitions from one input differential
pair to the other, there is virtually no noticeable change in the
output waveform.
The disable time of the AD8027/AD8028 amplifier is load
dependent. Typical data is presented in Table 7. See Figure 52
and Figure 53 for the actual switching measurements.
Table 7. DISABLE Switching Speeds
Supply Voltages
(R
L
= 1 k)
±5 V
t
ON
45 ns
t
OFF
980 ns
+5 V
50 ns
1100 ns
+3 V
50 ns
1150 ns
Driving a 16-Bit ADC
With the adjustable crossover distortion selection point and low
input signals into high resolution ADCs, such as the
AD7677,
a
16-Bit, 1 LSB INL, 1 MSPS
the typical schematic for driving the ADC.
相關PDF資料
PDF描述
AD8027 Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
AD8027AR Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
AD8027AR-REEL Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
AD8027AR-REEL7 Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
AD8027ART-R2 Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers
相關代理商/技術參數
參數描述
AD8028AR 制造商:Rochester Electronics LLC 功能描述:HIGH PERFORMANCE RRIO - Bulk 制造商:Analog Devices 功能描述:AMP LOW DISTORTION RRI/O SMD 8028
AD8028AR-EBZ 功能描述:BOARD EVAL FOR AD8028AR RoHS:是 類別:編程器,開發系統 >> 評估板 - 運算放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:-
AD8028ARM 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R I/O ±6V/12V 10-Pin MSOP 制造商:Analog Devices 功能描述:AMP LOW DISTORTION RRI/O SMD 8028
AD8028ARM-REEL 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R I/O ±6V/12V 10-Pin MSOP T/R
AD8028ARM-REEL7 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R I/O ±6V/12V 10-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:HIGH PERFORMANCE RRIO - Tape and Reel
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