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PDF ADA4051-2 Data sheet ( Hoja de datos )
| Número de pieza | ADA4051-2 | |
| Descripción | Rail-to-Rail I/O Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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1.8 V, Micropower, Zero-Drift,
Rail-to-Rail Input/Output Op Amp
ADA4051-2
FEATURES
Very low supply current: 13 μA
Low offset voltage: 15 μV maximum
Offset voltage drift: 20 nV/°C
Single-supply operation: 1.8 V to 5.5 V
High PSRR: 110 dB minimum
High CMRR: 110 dB minimum
Rail-to-rail input and output
Unity gain stable
Extended industrial temperature range
APPLICATIONS
Pressure and position sensors
Temperature measurements
Electronic scales
Medical instrumentation
Battery-powered equipment
Handheld test equipment
GENERAL DESCRIPTION
The ADA4051-2 is a CMOS, micropower, zero-drift opera-
tional amplifier utilizing an innovative chopping technique.
This amplifier features rail-to-rail input and output swing and
extremely low offset voltage while operating from a 1.8 V to
5.5 V power supply. This amplifier also offers high PSRR and
CMRR, while operating with a supply current of only 13 μA per
amplifier. This combination of features makes the ADA4051-2
amplifier an ideal choice for battery-powered applications where
high precision as well as low power consumption is important.
The ADA4051-2 is specified for the extended industrial temper-
ature range of −40°C to +125°C. The ADA4051-2 amplifier is
available in the standard 8-pin MSOP.
PIN CONFIGURATION
OUT A 1
–IN A 2
+IN A 3
V– 4
ADA4051-2
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. 8-Lead MSOP (RM-8)
The ADA4051-2 is a member of a growing series of zero-drift
op amps offered by Analog Devices, Inc. Refer to Table 1 for a
list of these devices.
Table 1. Op Amps
Supple Low Power, 5 V
Single
AD8538
Dual AD8539
Quad
5V
AD8628
AD8629
AD8630
16 V
AD8638
AD8639
Rev. 0
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.
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
©2009 Analog Devices, Inc. All rights reserved.
1 page  
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ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter
Supply Voltage
Input Voltage
Input Current1
Differential Input Voltage2
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
6V
±VSY ± 0.3 V
±10 mA
±VSY
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
1 The input pins have clamp diodes to the power supply pins. Limit input
current to 10 mA or less whenever input signals exceed the power supply
rail by 0.3 V.
2 Inputs are protected against high differential voltages by internal series
1.33 kΩ resistors and back-to-back diode-connected N-MOSFETs (with a
typical VT of 0.7 V for VCM of 0 V).
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ADA4051-2
THERMAL RESISTANCE
θJA is specified with the device soldered on a circuit board with
its exposed paddle soldered to a pad (if applicable) on a 4-layer
JEDEC standard PC board with zero air flow, unless otherwise
specified.
Table 5. Thermal Resistance
Package Type
θJA
8-Lead MSOP (RM-8)
186
θJC
52
Unit
°C/W
POWER SEQUENCING
The op amp supplies must be established simultaneously with,
or before, any input signals are applied. If this is not possible,
the input current must be limited to 10 mA.
ESD CAUTION
Rev. 0 | Page 5 of 20
5 Page 
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TA = 25°C, unless otherwise noted.
60
50 VVCRSILLNY====51050±p0k0mF.Ω9VVp-p
40
30
20
−OVERSHOOT
10
+OVERSHOOT
0
10 100
LOAD CAPACITANCE (pF)
Figure 32. Small-Signal Overshoot vs. Load Capacitance
VSY = 1.8V
RL = 10kΩ
CL = 100pF
G=1
VIN = 1.5V p-p
ADA4051-2
60
50 VCRVSILLNY====51050±p02kmF.Ω5VVp-p
40
30
−OVERSHOOT
20
+OVERSHOOT
10
0
10 100
LOAD CAPACITANCE (pF)
Figure 35. Small-Signal Overshoot vs. Load Capacitance
VSY = 5V
RL = 10kΩ
CL = 100pF
G=1
VIN = 4V p-p
TIME (100µs/DIV)
Figure 33. Large-Signal Transient Response
VSY = 1.8V
RL = 10kΩ
CL = 100pF
G=1
VIN = 50mV p-p
TIME (100µs/DIV)
Figure 36. Large Signal Transient Response
VSY = 5V
RL = 10kΩ
CL = 100pF
G=1
VIN = 50mV p-p
TIME (100µs/DIV)
Figure 34. Small-Signal Transient Response
TIME (100µs/DIV)
Figure 37. Small Signal Transient Response
Rev. 0 | Page 11 of 20
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