OP484FS ,Precision Rail-to-Rail Input & Output Operational AmplifiersCHARACTERISTICSOffset Voltage “OP184/284E” Grade V (Note 1) 65 μVOS–40°C ≤ T ≤ +125°C 165 μVAOffset ..
OP490EY ,Low Voltage Micropower Quad Operational AmplifierCHARACTERISTICSS A OP490A/E OP490F OP490GParameter Symbol Conditions Min Typ Max Min Typ Max Min T ..
OP490FY ,Low Voltage Micropower Quad Operational AmplifierCHARACTERISTICS (@ V = 61.5 V to 615 V, –558C ≤ T ≤ +1258C, unless otherwise noted)S AOP490AParamet ..
OP490GP ,Low Voltage Micropower Quad Operational AmplifierSPECIFICATIONS(@ V = 61.5 V to 615 V, T = +258C, unless otherwise noted)ELECTRICAL
OP490GP ,Low Voltage Micropower Quad Operational Amplifierapplications, such as portable instruments4 3 2 1 28 27 26and remote sensors.NCNC 5 256 24 +IN D+IN ..
OP490GS ,Low Voltage Micropower Quad Operational AmplifierSpecifications subject to change without notice.–2–REV. BOP490ELECTRICAL
P4NK60ZFP , N-CHANNEL600V-1.76ohm-4ATO-220/FP/DPAK/IPAK/D2PAK/I2PAK Zener-Protected SuperMESH™Power MOSFET
P4SMA100A ,ARK Electronics - Surface Mount Transient Voltage Suppressors Peak Pulse Power 400W Breakdown Voltage 6.8 to 550V
P4SMA100CA , Silicon Avalanche Diodes - 400W Surface Mount Transient Voltage Supressors
P4SMA100CA , Silicon Avalanche Diodes - 400W Surface Mount Transient Voltage Supressors
P4SMA10A ,ARK Electronics - Surface Mount Transient Voltage Suppressors Peak Pulse Power 400W Breakdown Voltage 6.8 to 550V
P4SMA10CA , Silicon Avalanche Diodes - 400W Surface Mount Transient Voltage Supressors
OP184FP-OP184FS-OP284ES-OP284FP-OP284FS-OP484ES-OP484FP-OP484FS
Precision Rail-to-Rail Input & Output Operational Amplifiers
REV.0
Precision Rail-to-Rail Input & Output
Operational Amplifiers
FEATURES
Single-Supply Operation
Wide Bandwidth: 4 MHz
Low Offset Voltage: 65 mV
Unity-Gain Stable
High Slew Rate: 4.0 V/ms
Low Noise: 3.9 nV/√Hz
APPLICATIONS
Battery Powered Instrumentation
Power Supply Control and Protection
Telecom
DAC Output Amplifier
ADC Input Buffer
GENERAL DESCRIPTIONThe OP184/OP284/OP484 are single, dual and quad single-
supply, 4 MHz bandwidth amplifiers featuring rail-to-rail inputs
and outputs. They are guaranteed to operate from +3 to +36 (or
±1.5 to ±18) volts and will function with a single supply as low
as +1.5 volts.
These amplifiers are superb for single supply applications re-
quiring both ac and precision dc performance. The combination
of bandwidth, low noise and precision makes the OP184/OP284/
OP484 useful in a wide variety of applications, including filters
and instrumentation.
Other applications for these amplifiers include portable telecom
equipment, power supply control and protection, and as amplifi-
ers or buffers for transducers with wide output ranges. Sensors
requiring a rail-to-rail input amplifier include Hall effect, piezo
electric, and resistive transducers.
The ability to swing rail-to-rail at both the input and output en-
ables designers to build multistage filters in single-supply sys-
tems and to maintain high signal-to-noise ratios.
The OP184/OP284/OP484 are specified over the HOT extended
industrial (–40°C to +125°C) temperature range. The single
and dual are available in 8-pin plastic DIP plus SO surface
mount packages. The quad OP484 is available in 14-pin plastic
DIPs and 14-lead narrow-body SO packages.
PIN CONFIGURATIONS
8-Lead Epoxy DIP
(P Suffix)
8-Lead SO
(S Suffix)
OUT A
NULLNULL
–IN A
+IN A
NC = NO CONNECT
8-Lead Epoxy DIP
(P Suffix)
8-Lead SO
(S Suffix)
OUT B
–IN B
+IN BOUT A
–IN A
+IN A
14-Lead Epoxy DIP
(P Suffix)
14-Lead Narrow-Body SO
(S Suffix)
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
+IN C
–IN C
OUT C
OP184/OP284/OP484–SPECIFICATIONS
ELECTRICAL CHARACTERISTICSNOTESInput Offset Voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power.
Specifications subject to change without notice.
(@ VS = +5.0 V, VCM = 2.5 V, TA = +258C unless otherwise noted)
ELECTRICAL CHARACTERISTICSNOTESInput Offset Voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power.
Specifications subject to change without notice.
OP184/OP284/OP484
(@ VS = +3.0 V, VCM = 1.5 V, TA = +258C unless otherwise noted)
OP184/OP284/OP484
ELECTRICAL CHARACTERISTICSNOTESInput Offset Voltage measurements are performed by automated test equipment approximately 0.5 seconds after application of power.
Specifications subject to change without notice.
WAFER TEST LIMITS
(@ VS = +5.0 V, VCM = 2.5 V, TA = +258C unless otherwise noted)
(@ VS = 615.0 V, VCM = 0 V, TA = +258C unless otherwise noted)
ABSOLUTE MAXIMUM RATINGS1SupplyVoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
Differential Input Voltage2 . . . . . . . . . . . . . . . . . . . . . ±0.6 V
Output Short-Circuit Duration to GND3 . . . . . . . . Indefinite
Storage Temperature Range
P, S Packages . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range
OP184/OP284/OP484E, F . . . . . . . . . . . . –40°C to +125°C
Junction Temperature Range
P, S Packages . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering60sec) . . . . . . . . +300°C
NOTESAbsolute maximum ratings apply to both DICE and packaged parts unless
otherwise noted.For input voltages greater than 0.6 volts, the input current should be limited to less
than 5 mA to prevent degradation or destruction of the input devices.θJA is specified for the worst case conditions; i.e., θJA is specified for device in socket
for cerdip and P-DIP packages; θJA is specified for device soldered in circuit board
for SOIC package.
ORDERING GUIDEOP284 Die Size 0.065 × 0.092 Inch, 5,980 Sq. Mils
Substrate (Die Backside) Is Connected to V–.
Transistor Count, 62.
OP484 Die Size 0.080 × 0.110 Inch, 8,800 Sq. Mils
Substrate (Die Backside) Is Connected to V–.
Transistor Count, 120.
CB1M
JB1
VCC
OUT
QUANTITY
150Figure 2.
Distribution
QUANTITY
150Figure 3.
Distribution
INPUT OFFSET VOLTAGE – µV
QUANTITY
–2525Figure 4.Input Offset Voltage
Distribution
TEMPERATURE – °C
INPUT BIAS CURRENT – nA
–75 Figure 7.Bias Current vs.
Temperature
Figure 10.Supply Current vs.
Temperature
OP184/OP284/OP484–Typical Performance Characteristics
SUPPLY CURRENT (PER AMPLIFIER) – mA
1.50±2.5
0.25Figure 11.Supply Current vs. Supply
Voltage
SHORT CIRCUIT CURRENT – mA–50
–25Figure 12.
Temperature
FREQUENCY – Hz
OPEN-LOOP GAIN – dB
10k100k10M1M
–10Figure 13.Open-Loop Gain and Phase
vs. Frequency (No Load)
TEMPERATURE – °C–50125
–250257550100Figure 16.Open-Loop Gain vs.
Temperature
Figure 18.Closed-Loop Gain vs.
Frequency (2 kΩ Load)
Figure 19.Closed-Loop Gain vs.
Frequency (2 kΩ Load)
FREQUENCY – Hz
OUTPUT IMPEDANCE – 240
150100k10M
10k1MFigure 20.Output Impedance vs.
Frequency
FREQUENCY – Hz
OUTPUT IMPEDANCE – 240
150100k10M
10k1MFigure 21.Output Impedance vs.
Frequency
FREQUENCY – Hz
OUTPUT IMPEDANCE – 240
150100k10M
10k1MFigure 22.Output Impedance vs.
Frequency
FREQUENCY – Hz
MAXIMUM OUTPUT SWING – Vp-p
10k100k1M10MFigure 23.Maximum Output Swing
vs. Frequency
FREQUENCY – Hz
MAXIMUM OUTPUT SWING – Vp-p
10k100k1M10MFigure 24.Maximum Output Swing
vs. Frequency
FREQUENCY – Hz
CMRR – dB
–20100k10M
10k1MFigure 25.CMRR vs. Frequency
Figure 27.Small Signal Overshoot
vs. Capacitive Load
TEMPERATURE – °C
–50125–2507510050Figure 28.Slew Rate vs. Temperature
OP184/OP284/OP484–Typical Performance Characteristics
NOISE DENSITY – nV/Figure 29.
vs. Frequency
CURRENT NOISE DENSITY – pA/Figure 30.
vs. Frequency
SETTLING TIME – µs
STEP SIZE – Volts016243Figure 31.Settling Time vs. Step Size
Figure 34.0.1 Hz to 10 Hz NoiseSmall Signal Transient
Figure 37.Small Signal Transient
Response
OP184/OP284/OP484
FREQUENCY – Hz
THD+N – %
0.000510010k1k
20kFigure 40.Total Harmonic Distortion
vs. Frequency
200mV
–200mVFigure 38.Small Signal Transient
Response
200mV
–200mVFigure 39.Small Signal Transient
Response
APPLICATIONS
Functional DescriptionThe OP284 and OP484 are precision single-supply, rail-to-rail
operational amplifiers. Intended for the portable instrumenta-
tion marketplace, the OP184/OP284/OP484 combines the at-
tributes of precision, wide bandwidth, and low noise to make it
a superb choice in those single supply applications that require
both ac and precision dc performance. Other low supply voltage
applications for which the OP284 is well suited are active filters,
audio microphone preamplifiers, power supply control, and tele-
com. To combine all of these attributes with rail-to-rail input/
output operation, novel circuit design techniques are used.
VPOSQ1
V01
–IN
V02
VNEG
+INFigure 41.OP284 Equivalent Input Circuit
For example, Figure 41 illustrates a simplified equivalent circuit
for the OP184/OP284/OP484’s input stage. It is comprised of
an NPN differential pair, Q1-Q2, and a PNP differential pair,
Q3-Q4, operating concurrently. Diode network D1-D2 serves
to clamp the applied differential input voltage to the OP284,
thereby protecting the input transistors against avalanche dam-
age. Input stage voltage gains are kept low for input rail-to-rail
operation. The two pairs of differential output voltages are con-
nected to the OP284’s second stage, which is a compound folded
cascode gain stage. It is also in the second gain stage where the
two pairs of differential output voltages are combined into a
stage. A key issue in the input stage is the behavior of the input
bias currents over the input common-mode voltage range. Input
bias currents in the OP284 are the arithmetic sum of the base
currents in Q1-Q3 and in Q2-Q4. As a result of this design
approach, the input bias currents in the OP284 not only exhibit
different amplitudes, but also exhibit different polarities. This
effect is best illustrated in Figure 8. It is, therefore, of para-
mount importance that the effective source impedances con-
nected to the OP284’s inputs be balanced for optimum dc and
ac performance.
To achieve rail-to-rail output, the OP284 output stage design
employs a unique topology for both sourcing and sinking cur-
rent. This circuit topology is illustrated in Figure 42. As previ-
ously mentioned, the output stage is voltage-driven from the
second gain stage. The signal path through the output stage is
inverting; that is, for positive input signals, Q1 provides the base
current drive to Q6 so that it conducts (sinks) current. For
negative input signals, the signal path via Q1-Q2-D1-Q4-Q3
provides the base current drive for Q5 to conduct (source) cur-
rent. Both amplifiers provide output current until they are
forced into saturation, which occurs at approximately 20 mV
from negative rail and 100 mV from the positive supply rail.
Figure 42.OP284 Equivalent Output Circuit
