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PDF ( 数据手册 , 数据表 ) AD8027

零件编号 AD8027
描述 Rail-to-Rail Input/Output Amplifiers
制造商 Analog Devices
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AD8027 数据手册, 描述, 功能
Data Sheet
Low Distortion, High Speed
Rail-to-Rail Input/Output Amplifiers
AD8027/AD8028
FEATURES
High speed
190 MHz, −3 dB bandwidth (G = +1)
100 V/µs slew rate
Low distortion
120 dBc at 1 MHz SFDR
80 dBc at 5 MHz SFDR
Selectable input crossover threshold
Low noise
4.3 nV/√Hz
1.6 pA/√Hz
Low offset voltage: 900 µV maximum
Low power: 6.5 mA per amplifier supply current
Power-down mode
No phase reversal: VIN > |VS| + 200 mV
Wide supply range: 2.7 V to 12 V
Small packaging: 8-lead SOIC, 6-lead SOT-23, 10-lead MSOP
Qualified for automotive applications (AD8028WARMZ-R7 only)
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 a 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 applications that use a
fraction of or use 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 DISABLE/SELECT pin
(DISABLE/SELECT x in the 10-lead MSOP, hereafter referred
to as DISABLE/SELECT throughout this data sheet). This feature
controls the voltage at which the complementary transistor
input pairs switch. The AD8027/AD8028 also have intrinsically
low crossover distortion.
1 Protected by U.S. patent numbers 6,486,737B1; 6,518,842B1.
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
PIN CONNECTION DIAGRAM
DNC 1
–IN 2
+IN 3
–VS 4
AD8027
8 DISABLE/SELECT
7 +VS
6 VOUT
5 DNC
DNC = DO NOT CONNECT. DO NOT
CONNECT TO THIS PIN.
Figure 1. 8-Lead SOIC, AD8027
See the Pin Configurations and Function Descriptions section
for additional pin configurations and information about the pin
functions.
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 (typical) per amplifier. The AD8027/
AD8028 have a shutdown mode that is controlled via
the DISABLE/SELECT pin.
The AD8027/AD8028 are available in 8-lead SOIC, 6-lead SOT-23,
and 10-lead MSOP packages. The AD8028WARMZ-R7 is an
automotive grade version, qualified for automotive applications.
See the Automotive Products section for more details. The
AD8027/AD8028 family is designed to work over the extended
temperature range of −40°C to +125°C.
–20
G = +1
FREQUENCY = 100kHz
–40 RL = 1k
–60
VS = +3V
–80
VS = +5V
VS = ±5V
–100
–120
–140
0
12345678
OUTPUT VOLTAGE (V p-p)
Figure 2. SFDR vs. Output Voltage
9 10
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2003–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com







AD8027 pdf, 数据表
AD8027/AD8028
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
DNC 1
–IN 2
+IN 3
–VS 4
AD8027
8 DISABLE/SELECT
7 +VS
6 VOUT
5 DNC
DNC = DO NOT CONNECT. DO NOT
CONNECT TO THIS PIN.
Figure 4. 8-Lead SOIC, AD8027 Pin Configuration
Data Sheet
Table 5. 8-Lead SOIC, AD8027 Pin Function Descriptions
Pin No.
Mnemonic
Description
1, 5 DNC
Do Not Connect. Do not connect to these pins.
2 −IN
Negative Input.
3 +IN
Positive Input.
4 −VS
Negative Supply.
6 VOUT
Output Voltage.
7 +VS
Positive Supply
8
DISABLE/SELECT
Power-Down/Select. The power-down function places the device into low power
consumption mode. The select function of this pin 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.
VOUT 1
6 +VS
–VS 2
+–
5 DISABLE/SELECT
+IN 3 AD8027 4 –IN
Figure 5. 6-Lead SOT-23, AD8027 Pin Configuration
Table 6. 6-Lead SOT-23, AD8027 Pin Function Descriptions
Pin No.
Mnemonic
Description
1 VOUT
Output Voltage.
2 −VS
Negative Supply.
3 +IN
Positive Input.
4 −IN
Negative Input.
5
DISABLE/SELECT
Power-Down/Select. The power-down function places the device into low power
consumption mode. The select function of this pin 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.
6 +VS
Positive Supply.
Rev. D | Page 8 of 27







AD8027 equivalent, schematic
AD8027/AD8028
290
VS = 5V
270
DISABLE/SELECT = HIGH
250
230
210
190 DISABLE/SELECT = TRI
170
150
–5 –4 –3 –2 –1 0 1 2 3 4 5
INPUT COMMON-MODE VOLTAGE (V)
Figure 44. Input Offset Voltage vs. Input Common-Mode Voltage, VS = ±5 V
290
VS = +5V
270
250
DISABLE/SELECT = HIGH
230
210
190 DISABLE/SELECT = TRI
170
150
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT COMMON-MODE VOLTAGE (V)
Figure 45. Input Offset Voltage vs. Input Common-Mode Voltage, VS = 5 V
270
VS = +3V
250
DISABLE/SELECT = HIGH
230
210
190 DISABLE/SELECT = TRI
170
150
0
0.50 1.00 1.50 2.00 2.50
INPUT COMMON-MODE VOLTAGE (V)
3.00
Figure 46. Input Offset Voltage vs. Input Common-Mode Voltage, VS = 3 V
Data Sheet
120
100
80
60
40
20
0
1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 47. Common-Mode Rejection Ratio (CMRR) vs. Frequency
0
–10
–20
–30
–40
–PSRR
–50
+PSRR
–60
–70
–80
–90
–100
–110
100 1k 10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
Figure 48. Power Supply Rejection Ratio (PSRR) vs. Frequency
–20 VIN = 0.2V p-p
G = +1
–30 DISABLE/SELECT = LOW
–40
–50
–60
–70
–80
–90
–100
10k
100k
1M 10M
FREQUENCY (Hz)
100M
Figure 49. Off Isolation vs. Frequency
1G
Rev. D | Page 16 of 27










页数 27 页
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