OP484 ,Precision Rail-to-Rail Input & Output Operational AmplifierGENERAL DESCRIPTION(P Suffix)The OP184/OP284/OP484 are single, dual and quad single-8-Lead SOsupply ..
OP484ES ,Precision Rail-to-Rail Input & Output Operational AmplifiersCHARACTERISTICSOutput Voltage High V I = 1.0 mA +4.85 VOH LOutput Voltage Low V I = 1.0 mA 125 mVOL ..
OP484ESZ , Precision Rail-to-Rail Input and Output Operational Amplifiers
OP484ESZ , Precision Rail-to-Rail Input and Output Operational Amplifiers
OP484ESZ-REEL , Precision Rail-to-Rail Input and Output Operational Amplifiers
OP484FP ,Precision Rail-to-Rail Input & Output Operational AmplifiersGENERAL DESCRIPTION(P Suffix)The OP184/OP284/OP484 are single, dual and quad single-8-Lead SOsupply ..
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
OP184-OP284-OP484
Single-Supply Rail-to-Rail Input/Output Operational Amplifier
REV.B
Precision Rail-to-Rail
Input and Output Operational Amplifiers
FEATURES
Single-Supply Operation
Wide Bandwidth: 4 MHz
Low Offset Voltage: 65 �V
Unity-Gain Stable
High Slew Rate: 4.0 V/�s
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
requiring both ac and precision dc performance. The combina-
tion 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
enables designers to build multistage filters in single-supply
systems 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-lead plastic DIP plus SO surface
mount packages. The quad OP484 is available in 14-lead plastic
DIPs and 14-lead narrow-body SO packages.
PIN CONFIGURATIONS
8-Lead Epoxy DIP
(P Suffix)
8-Lead SO
(S Suffix)
8-Lead Epoxy DIP
(P Suffix)
8-Lead SO
(S Suffix)
14-Lead Epoxy DIP
(P Suffix)
14-Lead Narrow-Body SO
(S Suffix)
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 = 25�C 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 = 25�C 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.
(@ VS = �15.0 V, VCM = 0 V, TA = 25�C 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.
Figure 3.Simplified Schematic
ORDERING GUIDENOTES
*Not for new design; obsolete April 2002.
INPUT OFFSET VOLTAGE – �V
QUANTITY
150TPC 1.Input Offset Voltage
Distribution
OFFSET VOLTAGE DRIFT, TCVOS – µV/�C
QUANTITY
100TPC 4.Input Offset Voltage Drift
Distribution
COMMON MODE VOLTAGE – V
INPUT BIAS CURRENT – nA
–400TPC 7.Input Bias Current vs.
Common-Mode Voltage
INPUT OFFSET VOLTAGE – �V
QUANTITY
150TPC 2.Input Offset Voltage
Distribution
OFFSET VOLTAGE DRIFT, TCVOS – µV/�C
QUANTITY
100TPC 5.Input Offset Voltage Drift
Distribution
LOAD CURRENT – mA
OUTPUT VOLTAGE – mV
1,000
1000.010.1101TPC 8.Output Voltage to Supply
Rail vs. Load Current
INPUT OFFSET VOLTAGE – �V
QUANTITY
–2525TPC 3.Input Offset Voltage
Distribution
TEMPERATURE – �C
INPUT BIAS CURRENT – nA
–75 TPC 6.Bias Current vs.
Temperature
TEMPERATURE – �C
SUPPLY CURRENT/AMPLIFIER – mA
–401252585 TPC 9.Supply Current vs.
Temperature
OP184/OP284/OP484–Typical Performance Characteristics
SUPPLY VOLTAGE – V
SUPPLY CURRENT (PER AMPLIFIER) – mA
1.50�2.5�20�5.0�10�12.5�15
0.25�17.5�7.5
TPC 10.Supply Current vs. Supply
Voltage
PHASE SHIFT – Degrees
FREQUENCY – Hz
OPEN-LOOP GAIN – dB
10k100k10M1M
–30TPC 13.Open-Loop Gain and Phase
vs. Frequency (No Load)
FREQUENCY – Hz
CLOSED-LOOP GAIN – dB
10010k1M10M
–30100kTPC 16.Closed-Loop Gain vs.
Frequency (2 kΩ Load)
TEMPERATURE – �C
SHORT CIRCUIT CURRENT – mA
–250257550100TPC 11.Short Circuit Current vs.
Temperature
PHASE SHIFT – Degrees
FREQUENCY – Hz
OPEN-LOOP GAIN – dB
10k100k10M1M
–30TPC 14.Open-Loop Gain and Phase
vs. Frequency (No Load)
CLOSED-LOOP GAIN – dB
10010k1M10M
–30100k
FREQUENCY – HzTPC 17.Closed-Loop Gain vs.
Frequency (2 kΩ Load)
PHASE SHIFT – Degrees
FREQUENCY – Hz
OPEN-LOOP GAIN – dB
10k100k10M1M
–30TPC 12.Open-Loop Gain and Phase
vs. Frequency (No Load)
TEMPERATURE – �C
OPEN-LOOP GAIN – V/mV
2.5k–50125
1.5k
–250257550100 TPC 15.Open-Loop Gain vs.
Temperature
FREQUENCY – Hz
CLOSED-LOOP GAIN – dB
–4010010k1M10M
–30100kTPC 18.Closed-Loop Gain vs.
Frequency (2 kΩ Load)
OP184/OP284/OP484
FREQUENCY – Hz
OUTPUT IMPEDANCE – 240
10010k1M10M
270100kTPC 19.Output Impedance vs.
Frequency
FREQUENCY – Hz
MAXIMUM OUTPUT SWING – V p-p10k100k1M10MTPC 22.Maximum Output Swing
vs. Frequency
FREQUENCY – Hz
PSSR – dB
–4010010k1M10M
140100kTPC 25.PSRR vs. Frequency
FREQUENCY – Hz
OUTPUT IMPEDANCE – 240
10010k1M10M
270100kTPC 20.Output Impedance vs.
Frequency
FREQUENCY – Hz
MAXIMUM OUTPUT SWING – V p-p10k100k1M10MTPC 23.Maximum Output Swing
vs. Frequency
CAPACITIVE LOAD – pF
OVERSHOOT – %101001000TPC 26.Small Signal Overshoot vs.
Capacitive Load
TPC 21.Output Impedance vs.
Frequency
FREQUENCY – Hz
CMRR – dB
–2010010k1M10M
160100kTPC 24.CMRR vs. Frequency
TEMPERATURE – �C
SLEW RATE – V/–50125–2507510050TPC 27.Slew Rate vs. Temperature
TPC 28.Voltage Noise Density
vs. Frequency
SETTLING TIME – �s
STEP SIZE – V
–10016243TPC 31.Settling Time vs. Step Size
TPC 34.Channel Separation
vs. Frequency
FREQUENCY – Hz
CURRENT NOISE DENSITY – pA/ TPC 29.Current Noise Density
vs. Frequency
TPC 32.0.1 Hz to 10 Hz Noise
TPC 35.Small Signal Transient
Response
SETTLING TIME – �s
STEP SIZE – V016243TPC 30.Settling Time vs. Step Size
TPC 33.0.1 Hz to 10 Hz Noise
TPC 36.Small Signal Transient
Response
OP184/OP284/OP484
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 combine the
attributes 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
telecom. To combine all of these attributes with rail-to-rail
input/output operation, novel circuit design techniques are used.
Figure 4.OP284 Equivalent Input Circuit
For example, Figure 4 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 ava-
lanche damage. Input stage voltage gains are kept low for input
rail-to-rail operation. The two pair of differential output volt-
ages are connected 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 single-ended output signal voltage used to drive
the output 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 po-
larities. This effect is best illustrated in TPC 6. It is, therefore,
of paramount importance that the effective source impedances
connected 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 current.
This circuit topology is illustrated in Figure 5. As previously
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) current.
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.
VPOS
VNEG
VOUT
INPUT FROM
SECOND GAIN
STAGEFigure 5.OP284 Equivalent Output Circuit
TPC 37.Small Signal Transient
Response
TPC 38.Small Signal Transient
Response
FREQUENCY – Hz
THD+N – %
0.000510010k1k
20kTPC 39.Total Harmonic Distortion
vs. Frequency
