Analog Devices AD8632ARM, AD8632AR, AD8631ART Datasheet
REV. 0
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reliable. However, no responsibility is assumed by Analog Devices for its
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which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD8631/AD8632
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2000
1.8 V, 5 MHz Rail-to-Rail
Low Power Operational Amplifiers
PIN CONFIGURATIONS
5-Lead SOT-23
(RT Suffix)
1
2
3
5
4
–IN A+IN A
V+
OUT A
AD8631
V–
8-Lead SOIC
(R Suffix)
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
AD8632
18
27
36
45
8-Lead SOIC
(RM Suffix)
–IN A
+IN A
V–
OUT B
–IN B
+IN B
V+
1
4
5
8
AD8632
OUT A
FEATURES
Single Supply Operation: 1.8 V to 6 V
Space-Saving SOT-23, SOIC Packaging
Wide Bandwidth: 5 MHz @ 5 V, 4 MHz @ 1.8 V
Low Offset Voltage: 4 mV Max, 0.8 mV typ
Rail-to-Rail Input and Output Swing
2 V/s Slew Rate @ 1.8 V
Only 225 A Supply Current @ 1.8 V
APPLICATIONS
Portable Communications
Portable Phones
Sensor Interface
Active Filters
PCMCIA Cards
ASIC Input Drivers
Wearable Computers
Battery-Powered Devices
New Generation Phones
Personal Digital Assistants
GENERAL DESCRIPTION
The AD8631 brings precision and bandwidth to the SOT-23-5
package at single supply voltages as low as 1.8 V and low supply
current. The small package makes it possible to place the AD8631
next to sensors, reducing external noise pickup.
The AD8631 and AD8632 are rail-to-rail input and output bipolar
amplifiers with a gain bandwidth of 4 MHz and typical voltage
offset of 0.8 mV from a 1.8 V supply. The low supply current and
the low supply voltage makes these parts ideal for battery-powered
applications. The 3 V/µs slew rate makes the AD8631/AD8632 a
good match for driving ASIC inputs, such as voice codecs.
The AD8631/AD8632 is specified over the extended industrial
(–40ⴗC to +125ⴗC) temperature range. The AD8631 single is
available in 5-lead SOT-23 surface-mount packages. The dual
AD8632 is available in 8-lead SOIC and µSOIC packages.
–2–
REV. 0
AD8631/AD8632–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
0.8 4.0 mV
–40ⴗC ≤ T
A
≤ +125ⴗC6mV
Input Bias Current I
B
250 nA
–40ⴗC ≤ T
A
≤ +125ⴗC 500 nA
Input Offset Current I
OS
±150 nA
–40ⴗC ≤ T
A
≤ +125ⴗC 550 nA
Input Voltage Range V
CM
05V
Common-Mode Rejection Ratio CMRR 0 V ≤ V
CM
≤ 5 V, 63 70 dB
–40ⴗC ≤ T
A
≤ +125ⴗC56 dB
Large Signal Voltage Gain A
VO
RL = 10 kΩ, 0.5 V < V
OUT
< 4.5 V 25 V/mV
R
L
= 100 kΩ, 0.5 V < V
OUT
< 4.5 V 100 400 V/mV
R
L
= 100 kΩ, –40ⴗC ≤ TA ≤ +125ⴗC 100 V/mV
Offset Voltage Drift ∆V
OS
/∆T 3.5 µV/ⴗC
Bias Current Drift ∆IB/∆T 400 pA/ⴗC
OUTPUT CHARACTERISTICS
Output Voltage Swing High V
OH
IL = 100 µA
–40ⴗC ≤ T
A
≤ +125ⴗC 4.965 V
I
L
= 1 mA 4.7 V
Output Voltage Swing Low V
OL
IL = 100 µA
–40ⴗC ≤ T
A
≤ +125ⴗC35mV
I
L
= 1 mA 200 mV
Short Circuit Current I
SC
Short to Ground, Instantaneous ±10 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.2 V to 6 V, 75 90 dB
–40ⴗC ≤ T
A
≤ +125ⴗC72 dB
Supply Current/Amplifier I
SY
V
OUT
= 2.5 V 300 450 µA
–40ⴗC ≤ TA ≤ +125ⴗC 650 µA
DYNAMIC PERFORMANCE
Slew Rate SR 1 V < V
OUT
< 4 V, RL = 10 kΩ 3V/µs
Gain Bandwidth Product GBP 5 MHz
Settling Time T
S
0.1% 860 ns
Phase Margin φ
m
53 Degrees
NOISE PERFORMANCE
Voltage Noise en p-p 0.1 Hz to 10 Hz 0.8 µV p-p
Voltage Noise Density e
n
f = 1 kHz 23 nV/√Hz
Current Noise Density i
n
f = 1 kHz 1.7 pA/√Hz
Specifications subject to change without notice.
(VS = 5 V, V– = 0 V, VCM = 2.5 V, TA = 25ⴗC unless otherwise noted)
–3–REV. 0
AD8631/AD8632
ELECTRICAL CHARACTERISTICS
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
0.8 4.0 mV
–40ⴗC ≤ T
A
≤ +125ⴗC6mV
Input Bias Current I
B
250 nA
Input Offset Current I
OS
±150 nA
Input Voltage Range V
CM
0 2.2 V
Common-Mode Rejection Ratio CMRR 0 V ≤ V
CM
≤ 2.2 V, 54 70 dB
–40ⴗC ≤ T
A
≤ +125ⴗC47 dB
Large Signal Voltage Gain A
VO
RL = 10 kΩ, 0.5 V < V
OUT
< 1.7 V 25 V/mV
RL = 100 kΩ 50 200 V/mV
OUTPUT CHARACTERISTICS
Output Voltage Swing High V
OH
IL = 100 µA 2.165 V
I
L
= 750 µA 1.9 V
Output Voltage Swing Low V
OL
IL = 100 µA35mV
IL = 750 µA 200 mV
POWER SUPPLY
Supply Current/Amplifier I
SY
V
OUT
= 1.1 V 250 350 µA
–40ⴗC ≤ TA ≤ +125ⴗC 500 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 2.5 V/µs
Gain Bandwidth Product GBP 4.3 MHz
Phase Margin φ
m
50 Degrees
NOISE PERFORMANCE
Voltage Noise Density e
n
f = 1 kHz 23 nV/√Hz
Current Noise Density i
n
f = 1 kHz 1.7 pA/√Hz
Specifications subject to change without notice.
(VS = 2.2 V, V– = 0 V, VCM = 1.1 V, TA = 25ⴗC unless otherwise noted)
–4–
REV. 0
AD8631/AD8632–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
0.8 4.0 mV
0ⴗC ≤ T
A
≤ 125ⴗC6mV
Input Bias Current I
B
250 nA
Input Offset Current I
OS
±150 nA
Input Voltage Range V
CM
0 1.8 V
Common-Mode Rejection Ratio CMRR 0 V ≤ V
CM
≤ 1.8 V,
0ⴗC ≤ T
A
≤ 125ⴗC4965dB
Large Signal Voltage Gain A
VO
RL = 10 kΩ, 0.5 V < V
OUT
< 1.3 V 20 V/mV
RL = 100 kΩ, 0.5 V < V
OUT
< 1.3 V 40 200 V/mV
OUTPUT CHARACTERISTICS
Output Voltage Swing High V
OH
IL = 100 µA 1.765 V
I
L
= 750 µA 1.5 V
Output Voltage Swing Low V
OL
IL = 100 µA35mV
IL = 750 µA 200 mV
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 1.7 V to 2.2 V, 68 86 dB
0ⴗC ≤ T
A
≤ 125ⴗC65 dB
Supply Current/Amplifier I
SY
V
OUT
= 0.9 V 225 325 µA
0ⴗC ≤ TA ≤ 125ⴗC 450 µA
DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 2V/µs
Gain Bandwidth Product GBP 4 MHz
Phase Margin φ
m
49 Degrees
NOISE PERFORMANCE
Voltage Noise Density e
n
f = 1 kHz 23 nV/√Hz
Current Noise Density i
n
f = 1 kHz 1.7 pA/√Hz
Specifications subject to change without notice.
(VS = 1.8 V, V– = 0 V, VCM = 0.9 V, TA = 25ⴗC unless otherwise noted)
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