參數(shù)資料
型號(hào)： AD8021ARMZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/29頁(yè)
文件大?。?/td> 0K
描述： IC OPAMP VF LN LP LDIST 8MSOP
設(shè)計(jì)資源： Driving the AD7366/7 Bipolar SAR ADC in Low-Distortion DC-Coupled Appls (CN0042)
標(biāo)準(zhǔn)包裝： 1,000
放大器類型： 電壓反饋
電路數(shù)： 1
轉(zhuǎn)換速率： 460 V/µs
-3db帶寬： 560MHz
電流 - 輸入偏壓： 7.5µA
電壓 - 輸入偏移： 400µV
電流 - 電源： 7.8mA
電流 - 輸出 / 通道： 70mA
電壓 - 電源，單路/雙路(±)： 4.5 V ~ 24 V，±2.25 V ~ 12 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 帶卷 (TR)
Low Noise, High Speed Amplifier
for 16-Bit Systems
AD8021
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
FEATURES
Low noise
2.1 nV/√Hz input voltage noise
2.1 pA/√Hz input current noise
Custom compensation
Constant bandwidth from G = 1 to G = 10
High speed
200 MHz (G = 1)
190 MHz (G = 10)
Low power
34 mW or 6.7 mA typical for 5 V supply
Output disable feature, 1.3 mA
Low distortion
93 dBc second harmonic, fC = 1 MHz
108 dBc third harmonic, fC = 1 MHz
DC precision
1 mV maximum input offset voltage
0.5 μV/°C input offset voltage drift
Wide supply range, 5 V to 24 V
Low price
Small packaging
Available in SOIC-8 and MSOP-8
APPLICATIONS
ADC preamps and drivers
Instrumentation preamps
Active filters
Portable instrumentation
Line receivers
Precision instruments
Ultrasound signal processing
High gain circuits
GENERAL DESCRIPTION
The AD8021 is an exceptionally high performance, high speed
voltage feedback amplifier that can be used in 16-bit resolution
systems. It is designed to have both low voltage and low current
noise (2.1 nV/√Hz typical and 2.1 pA/√Hz typical) while operating
at the lowest quiescent supply current (7 mA @ ±5 V) among
today’s high speed, low noise op amps. The AD8021 operates
over a wide range of supply voltages from ±2.25 V to ±12 V, as
well as from single 5 V supplies, making it ideal for high speed,
low power instruments. An output disable pin allows further
reduction of the quiescent supply current to 1.3 mA.
CONNECTION DIAGRAM
8
7
6
5
1
2
3
4
LOGIC
REFERENCE
–IN
+IN
–VS
DISABLE
+VS
VOUT
CCOMP
AD8021
01888-001
Figure 1. SOIC-8 (R-8) and MSOP-8 (RM-8)
The AD8021 allows the user to choose the gain bandwidth
product that best suits the application. With a single capacitor,
the user can compensate the AD8021 for the desired gain with
little trade-off in bandwidth. The AD8021 is a well-behaved
amplifier that settles to 0.01% in 23 ns for a 1 V step. It has a fast
overload recovery of 50 ns.
The AD8021 is stable over temperature with low input offset
voltage drift and input bias current drift, 0.5 μV/°C and 10 nA/°C,
respectively. The AD8021 is also capable of driving a 75 Ω line
with ±3 V video signals.
The AD8021 is both technically superior and priced considerably
less than comparable amps drawing much higher quiescent
current. The AD8021 is a high speed, general-purpose amplifier,
ideal for a wide variety of gain configurations and can be used
throughout a signal processing chain and in control loops. The
AD8021 is available in both standard 8-lead SOIC and MSOP
packages in the industrial temperature range of 40°C to +85°C.
FREQUENCY (Hz)
0.1M
1G
1M
10M
100M
CLOSED-LOOP
GAIN
(dB)
24
21
–6
18
15
12
9
6
3
0
–3
VOUT = 50mV p-p
G = –10, RF = 1kΩ, RG = 100Ω,
RIN = 100Ω, CC = 0pF
G = –5, RF = 1kΩ, RG = 200Ω,
RIN = 66.5Ω, CC = 1.5pF
G = –2, RF = 499Ω, RG = 249Ω,
RIN = 63.4Ω, CC = 4pF
G = –1, RF = 499Ω, RG = 499Ω,
RIN = 56.2Ω, CC = 7pF
01888-002
Figure 2. Small Signal Frequency Response
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