AO321C5VR-Z [AITSEMI]
CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER;
| 型号： | AO321C5VR-Z |
| 厂家： | 
AiT Semiconductor |
| 描述： | CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER LTE |
| 文件： | 总14页 (文件大小：735K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
DESCRIPTION
FEATURES
Single-Supply Operation from +2.1V ~ +5.5V
Rail-to-Rail Input / Output
Gain-Bandwidth Product: 1MHz (Typ.)
Low Input Bias Current: 1pA (Typ.)
Low Offset Voltage: 3.5mV (Max.)
Quiescent Current: 40μA per Amplifier (Typ.)
Operating Temperature: -40°C ~ +125°C
Embedded RF Anti-EMI Filter
The AO321 family have a high gain-bandwidth
product of 1MHz, a slew rate of 0.6V/μs, and a
quiescent current of 40μA/amplifier at 5V. The
AO321 family is designed to provide optimal
performance in low voltage and low noise systems.
They provide rail-to-rail output swing into heavy
loads. The input common mode voltage range
includes ground, and the maximum input offset
voltage is 3.5mV for AO321 family. They are
specified over the extended industrial temperature
range (-40℃ to +125℃). The operating range is
from 2.1V to 5.5V.
Available in SC70-5 and SOT-25 Packages
APPLICATION
ASIC Input or Output Amplifier
Sensor Interface
Medical Communication
Smoke Detectors
Audio Output
Piezoelectric Transducer Amplifier
Medical Instrumentation
Portable Systems
The AO321 is available in SC70-5 and SOT-25
packages.
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
AO321C5R-Z
AO321C5VR-Z
AO321E5R-Z
AO321E5VR-Z
SC70-5
C5
E5
SPQ: 3,000pcs/Reel
SOT-25
SPQ: 3,000pcs/Reel
Z: Pin Type
None: Type A
B: Type B
Note
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
REV1.0
- FEB 2019 RELEASED -
- 1 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
PIN DESCRIPTION
Top View
Top View
Top View
Top View
Pin #
Symbol
Function
Type A
Type B
1
2
3
4
5
3
2
4
1
5
IN+
VSS
Analog Positive Input
Ground or Negative Power Supply Input
Analog Inverting Input
IN-
OUT
VDD
Output
Positive Power Supply Input
REV1.0
- FEB 2019 RELEASED -
- 2 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage (VDD to VSS)
Analog Input Voltage (IN+ or IN-)
PDB Input Voltage
-0.5V ~ +7.5V
Vss-0.5V ~ VDD+0.5V
Vss-0.5V ~ +7V
-40°C ~ 125°C
+160°C
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10sec)
Package Thermal Resistance (TA=+25℃)
θJA, SC70-5
-55°C ~ 150°C
+260°C
333°C/W
190°C/W
θJA, SOT-25
ESD Susceptibility
HBM
6kV
MM
300V
Stress beyond above listed ꢀAbsolute Maximum Ratingsꢁ may lead permanent damage to the device. These are stress ratings only and
operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
REV1.0
- FEB 2019 RELEASED -
- 3 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
ELECTRICAL CHARACTERISTICS
At VS = +5V, RL = 100kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
TYP
MIN/MAX OVER TEMPERATURE
Parameter
Symbol
Conditions
-40℃ to
85℃
MIN /
MAX
+25℃
+25℃
Unit
INPUT CHARACTERISTICS
Input Offset Voltage
Input Bias Current
VOS
IB
VCM = VS/2
0.4
1
3.5
5.6
mV
pA
pA
Max
Typ
Typ
-
-
-
-
Input Offset Current
IOS
1
-0.1
to
+5.6
Input Common Mode
Voltage Range
VCM
VS = 5.5V
-
-
V
Typ
VS = 5.5V, VCM
-0.1V to 4V
=
=
70
68
80
62
56
70
62
55
70
dB
dB
dB
Min
Min
Min
Common Mode
CMRR
Rejection Ratio
VS = 5.5V, VCM
-0.1V to 5.6V
RL = 5kΩ, VO =
+0.1V to +4.9V
Open-Loop Voltage Gain
AOL
RL = 10kΩ, VO =
100
2.7
90
-
85
-
dB
Min
Typ
+0.1V to +4.9V
Input Offset Voltage Drift ΔVOS/ΔT
OUTPUT CHARACTERISTICS
VOH
μV/°C
RL = 100kΩ
RL = 100kΩ
RL = 10kΩ
RL = 10kΩ
4.997
3
4.990
10
4.980
20
V
mV
V
Min
Max
Min
VOL
VOH
Output Voltage Swing
from Rail
4.992
8
4.970
30
4.960
40
VOL
mV
Max
ISOURCE
ISINK
84
60
45
Output Current
RL = 10Ω to VS/2
mA
Min
75
60
45
REV1.0
- FEB 2019 RELEASED -
- 4 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
TYP
MIN/MAX OVER TEMPERATURE
Parameter
Symbol
Conditions
-40℃ to
85℃
MIN /
MAX
+25℃
+25℃
Unit
POWER SUPPLY
Operating Voltage
Range
-
-
2.1
5.5
2.5
5.5
V
V
Min
Max
Power Supply Rejection
Ratio
VS = +2.5V to
PSRR
IQ
82
40
60
60
58
80
dB
Min
+5.5V, VCM = +0.5V
Quiescent
μA
Max
Current/Amplifier
DYNAMIC PERFORMANCE (CL = 100pF)
Gain-Bandwidth Product
GBP
1
-
-
-
-
MHz
Typ
Typ
G = +1, 2V Output
Step
Slew Rate
SR
0.6
V/μs
G = +1, 2V Output
Step
Settling Time to 0.1%
tS
5
-
-
-
-
μs
μs
Typ
Typ
Overload Recovery Time
NOISE PERFORMANCE
VIN ·Gain = VS
2.6
nV /
Hz
f = 1kHz
27
20
-
-
-
-
Typ
Typ
Voltage Noise Density
en
nV /
Hz
f = 10kHz
REV1.0
- FEB 2019 RELEASED -
- 5 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
TYPICAL PERFORMANCE CHARACTERISTICS
At TA=+25℃, VS=+5V, and RL=100kΩ connected to VS/2, unless otherwise noted.
1.
3.
5.
Large-Signal Step Response
2.
4.
6.
Small-Signal Step Response
Supply Current vs. Supply Voltage
Short-Circuit Current vs. Supply Voltage
Output Voltage vs. Output Current
Output Voltage vs. Output Current
REV1.0
- FEB 2019 RELEASED -
- 6 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
7.
Overload Recovery Time
8.
Supply Current vs. Temperature
9.
Input Voltage Noise Spectral Density vs.
Frequency
10. Open Loop Gain, Phase Shift vs. Frequency at
+5V
11. CMRR vs. Frequency
12. PSRR vs. Frequency
REV1.0
- FEB 2019 RELEASED -
- 7 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
DETAILED INFORMATION
Size
AO321 family series op amps are unity-gain stable and suitable for a wide range of general-purpose
applications. The small footprints of the AO321 family packages save space on printed circuit boards and
enable the design of smaller electronic products.
Power Supply Bypassing and Board Layout
AO321 family series operates from a single 2.1V to 5.5V supply or dual ±1.05V to ±2.75V supplies. For best
performance, a 0.1μF ceramic capacitor should be placed close to the VDD pin in single supply operation. For
dual supply operation, both VDD and VSS supplies should be bypassed to ground with separate 0.1μF ceramic
capacitors.
Low Supply Current
The low supply current (typical 40uA per channel) of AO321 family will help to maximize battery life. They are
ideal for battery powered systems
Operating Voltage
AO321 family operates under wide input supply voltage (2.1V to 5.5V). In addition, all temperature
specifications apply from -40℃ to +125℃. Most behavior remains unchanged throughout the full operating
voltage range. These guarantees ensure operation throughout the single Li-Ion battery lifetime
Rail-to-Rail Input
The input common-mode range of AO321 family extends 100mV beyond the supply rails (VSS-0.1V to
VDD+0.1V). This is achieved by using complementary input stage. For normal operation, inputs should be
limited to this range.
Rail-to-Rail Output
Rail-to-Rail output swing provides maximum possible dynamic range at the output. This is particularly
important when operating in low supply voltages. The output voltage of AO321 family can typically swing to
less than 5mV from supply rail in light resistive loads (>100kΩ), and 30mV of supply rail in moderate resistive
loads (10kΩ).
REV1.0
- FEB 2019 RELEASED -
- 8 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
Capacitive Load Tolerance
The AO321 family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance
will create a pole in the amplifier’s feedback path, leading to excessive peaking and potential oscillation. If
dealing with load capacitance is a requirement of the application, the two strategies to consider are (1) using a
small resistor in series with the amplifier’s output and the load capacitance and (2) reducing the bandwidth of
the amplifier’s feedback loop by increasing the overall noise gain.
Figure 1. shows a unity gain follower using the series resistor strategy. The resistor isolates the output from
the capacitance and, more importantly, creates a zero in the feedback path that compensates for the pole
created by the output capacitance.
Figure 1. Indirectly Driving a Capacitive Load Using Isolation Resistor
The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive load RL in
parallel with the capacitive load, a voltage divider (proportional to RISO/RL) is formed, this will result in a gain
error.
The circuit in Figure 2 is an improvement to the one in Figure 1. RF provides the DC accuracy by feed-forward
the VIN to RL. CF and RISO serve to counteract the loss of phase margin by feeding the high frequency
component of the output signal back to the amplifier’s inverting input, thereby preserving the phase margin in
the overall feedback loop. Capacitive drive can be increased by increasing the value of CF. This in turn will
slow down the pulse response.
Figure 2. Indirectly Driving a Capacitive Load with DC Accuracy
REV1.0
- FEB 2019 RELEASED -
- 9 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
Typical Application Circuits
Differential amplifier
The differential amplifier allows the subtraction of two input voltages or cancellation of a signal common the
two inputs. It is useful as a computational amplifier in making a differential to single-end conversion or in
rejecting a common mode signal. Figure 3. shown the differential amplifier using AO321 family.
Figure 3. Differential Amplifier
VOUT R1R2 R4 VIN -
VIP R1R2 R3 VREF
R2
R1
R3 R4 R1
R3 R4 R1
If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then
VOUT
=
R2 (VIP - VIN) + VREF
R1
Low Pass Active Filter
The low pass active filter is shown in Figure 4. The DC gain is defined by –R2/R1. The filter has a
-20dB/decade roll-off after its corner frequency ƒC=1/(2πR3C1).
Figure 4. Low Pass Active Filter
REV1.0
- FEB 2019 RELEASED -
- 10 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
Instrumentation Amplifier
The triple AO321 family can be used to build a three-op-amp instrumentation amplifier as shown in Figure 5.
The amplifier in Figure 5 is a high input impedance differential amplifier with gain of R2/R1. The two differential
voltage followers assure the high input impedance of the amplifier.
Figure 5. Instrument Amplifier
REV1.0
- FEB 2019 RELEASED -
- 11 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
PACKAGE INFORMATION
Dimension in SC70-5 (Unit: mm)
Millimeters
Inches
Symbol
Min
Max
Min
Max
A
A1
A2
b
C
D
E
E1
e
0.900
0.000
0.900
0.150
0.080
2.000
1.150
2.150
1.100
0.100
1.000
0.350
0.150
2.200
1.350
2.450
0.035
0.000
0.035
0.006
0.003
0.079
0.045
0.085
0.043
0.004
0.039
0.014
0.006
0.087
0.053
0.096
0.650 TYP
0.026 TYP
e1
L
1.200
1.400
0.047
0.055
0.525 REF
0.021 REF
L1
θ
0.260
0°
0.460
8°
0.010
0°
0.018
8°
REV1.0
- FEB 2019 RELEASED -
- 12 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
Dimension in SOT-25 (Unit: mm)
Millimeters
Inches
Symbol
Min
Max
Min
Max
A
A1
A2
b
c
D
E
E1
e
e1
L
1.050
0.000
1.050
0.300
0.100
2.820
1.500
2.650
0.950 BSC
1.900 BSC
0.300
0°
1.250
0.100
1.150
0.500
0.200
3.020
1.700
2.950
0.041
0.000
0.041
0.012
0.004
0.111
0.059
0.104
0.037 BSC
0.075 BSC
0.012
0°
0.049
0.004
0.045
0.020
0.008
0.119
0.067
0.116
0.600
8°
0.024
8°
θ
REV1.0
- FEB 2019 RELEASED -
- 13 -
AiT Semiconductor Inc.
AO321
www.ait-ic.com
OP AMPLIFIER
1MHz CMOS RAIL-TO-RAIL IO OPAMP WITH RF FILTER
IMPORTANT NOTICE
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer. As used herein may involve
potential risks of death, personal injury, or server property, or environmental damage. In order to minimize
risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.0
- FEB 2019 RELEASED -
- 14 -
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