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| 型号： | AD8028ARZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/25页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP R-R DUAL LDIST 8SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 电压反馈 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 100 V/µs |
| -3db带宽： | 190MHz |
| 电流 - 输入偏压： | 4µA |
| 电压 - 输入偏移： | 200µV |
| 电流 - 电源： | 6.5mA |
| 电流 - 输出 / 通道： | 120mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 V |
| 工作温度： | -40°C ~ 125°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-SO |
| 包装： | 带卷 (TR) |
Low Distortion, High Speed
Rail-to-Rail Input/Output Amplifiers
AD8027/AD8028
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
FEATURES
High speed
190 MHz, –3 dB bandwidth (G = +1)
100 V/μs slew rate
Low distortion
120 dBc @ 1 MHz SFDR
80 dBc @ 5 MHz SFDR
Selectable input crossover threshold
Low noise
4.3 nV/√Hz
1.6 pA/√Hz
Low offset voltage: 900 μV max
Low power: 6.5 mA/amplifier supply current
Power-down mode
No phase reversal: VIN > |VS| + 200 mV
Wide supply range: 2.7 V to 12 V
Small packaging: SOIC-8, SOT-23-6, MSOP-10
APPLICATIONS
Filters
ADC drivers
Level shifting
Buffering
Professional video
Low voltage instrumentation
GENERAL DESCRIPTION
The AD8027/AD80281 are high speed amplifiers with rail-to-
rail input and output that operate on low supply voltages and
are optimized for high performance and wide dynamic signal
range. The AD8027/AD8028 have low noise (4.3 nV/√Hz,
1.6 pA/√Hz) and low distortion (120 dBc at 1 MHz). In appli-
cations that use a fraction of, or the entire input dynamic range
and require low distortion, the AD8027/AD8028 are ideal
choices.
Many rail-to-rail input amplifiers have an input stage that
switches from one differential pair to another as the input signal
crosses a threshold voltage, which causes distortion. The
AD8027/AD8028 have a unique feature that allows the user to
select the input crossover threshold voltage through the
SELECT pin. This feature controls the voltage at which the
complementary transistor input pairs switch. The AD8027/
AD8028 also have intrinsically low crossover distortion.
CONNECTION DIAGRAMS
AD8027
SOT-23-6
(RT)
VOUT 1
–VS 2
+IN
3
5
6
+VS
DISABLE/SELECT
4
–IN
+–
03327-B-001
NC = NO CONNECT
NC
AD8027
SOIC-8
(R)
1
–IN
2
+IN
3
–VS 4
+VS
VOUT
NC
8
7
6
5
DISABLE/SELECT
VOUTB
–IN B
+IN B
8
7
6
5
+VS
VOUTA
AD8028
SOIC-8
(R)
1
–IN A
2
+IN A
3
–VS 4
+
–
+
VOUTB
10
9
+VS
DISABLE/SELECT B
–IN B
+IN B
8
7
6
DISABLE/SELECT A
VOUTA
AD8028
MSOP-10
(RM)
1
–IN A
2
+IN A
3
–VS 4
5
+
–
+
–
Figure 1. Connection Diagrams (Top View)
With their wide supply voltage range (2.7 V to 12 V) and wide
bandwidth (190 MHz), the AD8027/AD8028 amplifiers are
designed to work in a variety of applications where speed and
performance are needed on low supply voltages. The high per-
formance of the AD8027/AD8028 is achieved with a quiescent
current of only 6.5 mA/amplifier typical. The AD8027/AD8028
have a shutdown mode that is controlled via the SELECT pin.
The AD8027/AD8028 are available in SOIC-8, MSOP-10, and
SOT-23-6 packages. They are rated to work over the industrial
temperature range of –40°C to +125°C.
OUTPUT VOLTAGE (V p-p)
0123456789
1
–140
–120
–100
–80
–60
–40
–20
SFDR
(dB)
0
G = +1
FREQUENCY = 100kHz
RL = 1kΩ
VS = ±5V
VS = +3V
VS = +5V
03327-A-063
Figure 2. SFDR vs. Output Amplitude
1Protected by U.S. patent numbers 6,486,737B1; 6,518,842B1
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