AD8591ART-REEL-AD8592ARM-REEL Fast Delivery |IC PHOENIX CO.,LIMITED

AD8592ARM-REEL ,Dual, CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifier with ±250 mA Output Current and a Power-Saving Shutdown ...GENERAL DESCRIPTIONThe AD8591, AD8592 and AD8594 are single, dual and quad1 16OUT A OUT Drail-to-ra ..
AD8594AR ,CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with ShutdownCHARACTERISTICSOutput Voltage High V I = 10 mA +4.9 +4.94 VOH L–40

AD8591ART-REEL-AD8592ARM-REEL
Single, CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifier with ±250 mA output Current and a Power-Saving Shutdown ...
REV.A
CMOS Single Supply
Rail-to-Rail Input/Output
Operational Amplifiers with Shutdown
PIN CONFIGURATIONS
6-Lead SOT
(RT Suffix)
10-Lead mSOIC
(RM Suffix)
16-Lead Narrow SOIC
(R Suffix)
16-Lead TSSOP
(RU Suffix)
FEATURES
Single Supply Operation: +2.5 V to +6 V
High Output Current: 6250 mA
Extremely Low Shutdown Supply Current: 100 nA
Low Supply Current: 750 mA/Amp
Wide Bandwidth: 3 MHz
Slew Rate: 5 V/ms
No Phase Reversal
Very Low Input Bias Current
High Impedance Outputs When in Shutdown Mode
Unity Gain Stable
APPLICATIONS
Mobile Communication Handset Audio
PC Audio
PCMCIA/Modem Line Driving
Battery Powered Instrumentation
Data Acquisition
ASIC Input or Output Amplifier
LCD Display Reference Level Driver
GENERAL DESCRIPTION
The AD8591, AD8592 and AD8594 are single, dual and quad
rail-to-rail input and output single supply amplifiers featuring
250 mA output drive current and a power saving shutdown
mode. The AD8592 includes an independent shutdown func-
tion for each amplifier. When both amplifiers are in shutdown
mode the total supply current is reduced to less than 1 mA. The
AD8591 and AD8594 include a single master shutdown func-
tion that reduces total supply current to less than 1 mA. All
amplifier outputs are in a high impedance state when in shut-
down mode.
These amplifiers have very low input bias currents, making them
suitable for integrators and diode amplification. Outputs are
stable with virtually any capacitive load. Supply current is less
than 750 mA per amplifier in active mode.
Applications for these amplifiers include audio amplification for
portable computers, portable phone headsets, sound ports, sound
cards and set-top boxes. The AD859x family is capable of driving
heavy capacitive loads such as LCD panel reference levels.
The ability to swing rail-to-rail at both the input and output
enables designers to buffer CMOS DACs, ASICs and other
wide output swing devices in single supply systems.
The AD8591, AD8592 and AD8594 are specified over the indus-
trial (–40°C to +85°C) temperature range. The AD8591, single,
is available in the tiny 6-lead SOT package. The AD8592, dual, is
available in the 10-lead mSOIC surface mount package. The
AD8594, quad, is available in 16-lead narrow SOIC and 16-lead
TSSOP packages.
AD8591/AD8592/AD8594–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
POWER SUPPLY␣
NOISE PERFORMANCE␣
Specifications subject to change without notice.
(VS = +2.7 V, VCM = +1.35 V, TA = +258C unless otherwise noted)
AD8591/AD8592/AD8594
ELECTRICAL CHARACTERISTICS
POWER SUPPLY␣
Specifications subject to change without notice.
(VS = +5.0 V, VCM = +2.5 V, TA = +258C unless otherwise noted)
AD8591/AD8592/AD8594
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD8591/AD8592/AD8594 features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+6 V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .GND to VS
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . .–6 V
Output Short Circuit
Duration to GND . . . . . . . . . . . .Observe Derating Curves
Storage Temperature Range
R, RT, RM, RU Packages . . . . . . . . . . . .–65°C to +150°C
Operating Temperature Range
AD8591/AD8592/AD8594 . . . . . . . . . . . .–40°C to +85°C
Junction Temperature Range
R, RT, RM, RU Packages . . . . . . . . . . . .–65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . .+300°C
NOTESStresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability.For supplies less than –5 V the differential input voltage is limited to the supplies.
NOTEqJA is specified for worst case conditions, i.e., qJA is specified for device in socket
for surface mount packages.
ORDERING GUIDE
LOAD CURRENT – mA
0.10.01
OUTPUT VOLTAGE – mV
100
Figure 1. Output Voltage to Supply
Rail vs. Load Current
LOAD CURRENT – mA
0.10.01
OUTPUT VOLTAGE – mV
10k
100
Figure 2.Output Voltage to Supply
Rail vs. Load Current
TEMPERATURE – 8C
SUPPLY CURRENT/AMPLIFIER – mA
VS = +2.7V
Figure 3.Supply Current per
Amplifier vs. Temperature
Typical Performance Characteristics
AD8591/AD8592/AD8594
SUPPLY VOLTAGE – 6Volts
SUPPLY CURRENT/AMPLIFIER – mA
0.5
Figure 4.Supply Current per
Amplifier vs. Supply Voltage
TEMPERATURE – 8C
INPUT OFFSET VOLTAGE – mV250235855254565
Figure 5.Input Offset Voltage vs.
Temperature
TEMPERATURE – 8C
INPUT BIAS CURRENT – pA
250235855254565
Figure 6.Input Bias Current vs.
Temperature
TEMPERATURE – 8C
INPUT OFFSET CURRENT – pA250235855254565
Figure 7.Input Offset Current vs.
Temperature
COMMON-MODE VOLTAGE –Volts
INPUT BIAS CURRENT – pA015234
Figure 8.Input Bias Current vs.
Common-Mode Voltage
FREQUENCY – Hz
GAIN – dB10k100M100k1M10M
PHASE SHIFT – Degrees
Figure 9.Open-Loop Gain and Phase
vs. Frequency
Figure 10.Open-Loop Gain and
Phase vs. Frequency
FREQUENCY – Hz
OUTPUT SWING – V p-p10k10M100k1M
Figure 11.Closed-Loop Output
Voltage Swing vs. Frequency
FREQUENCY – Hz
OUTPUT SWING – V p-p10k10M100k1M
Figure 12.Closed-Loop Output
Voltage Swing vs. Frequency
AD8591/AD8592/AD8594
FREQUENCY – Hz
IMPEDANCE – 10k100M100k1M10M
200
Figure 13.Closed-Loop Output
Impedance vs. Frequency
FREQUENCY – Hz
CMRR – dB
11010k10M100k1M
100
Figure 14.Common-Mode Rejection
Ratio vs. Frequency
FREQUENCY – Hz
PSRR – dB10k100k1M10M
140
Figure 15.Power Supply Rejection
Ratio vs. Frequency
FREQUENCY – Hz
PSRR – dB10k100k1M10M
140
Figure 16.Power Supply Rejection
Ratio vs. Frequency
CAPACITANCE – pF
SMALL SIGNAL OVERSHOOT – %1010010k1k
Figure 17.Small Signal Overshoot
vs. Load Capacitance
CAPACITANCE – pF
SMALL SIGNAL OVERSHOOT – %1010010k1k
Figure 18.Small Signal Overshoot
vs. Load Capacitance
Figure 19.Small Signal Transient
Response
Figure 20.Small Signal Transient
Response
Figure 21.Large Signal Transient
Response
Figure 22.Large Signal Transient
Response
Figure 23.No Phase Reversal
Figure 24.Current Noise Density vs.
Frequency
Figure 25.Voltage Noise Density vs.
Frequency
Figure 26.Voltage Noise Density vs.
Frequency
Figure 27.Input Offset Voltage
Distribution
Figure 28.Input Offset Voltage
Distribution
AD8591/AD8592/AD8594
AD8591/AD8592/AD8594 APPLICATION SECTION
Theory of Operation
The AD859x family of amplifiers are all CMOS, high output drive,
rail-to-rail input and output single supply amplifiers designed for
low cost and high output current drive. The parts include a power
saving shutdown function making the AD8591/AD8592/AD8594
op amps ideal for portable multimedia and telecom applications.
Figure 29 shows the simplified schematic for an AD8591/AD8592/
AD8594 amplifier. Two input differential pairs, consisting of an
n-channel pair (M1-M2) and a p-channel pair (M3-M4), provide
a rail-to-rail input common-mode range. The outputs of the input
differential pairs are combined in a compound folded-cascode
stage, which drives the input to a second differential pair gain
stage. The outputs of the second gain stage provide the gate volt-
age drive to the rail-to-rail output stage.
The rail-to-rail output stage consists of M15 and M16, which are
configured in a complementary common-source configuration.
As with any rail-to-rail output amplifier, the gain of the output
stage, and thus the open-loop gain of the amplifier, is dependent
on the load resistance. Also, the maximum output voltage swing
is directly proportional to the load current. The difference be-
tween the maximum output voltage to the supply rails, known as
the dropout voltage, is determined by the AD8591/AD8592/
AD8594 output transistors’ on-channel resistance. The output
dropout voltage is given in Figure 1 and Figure 2.
100mA
M15
M16
OUT
IN–
IN+
*NOTE: ALL CURRENT SOURCES GO
TO 0 mA IN SHUTDOWN MODE
M31
Figure 29.AD8591/AD8592/AD8594 Simplified Schematic
Input Voltage Protection
Although not shown on the simplified schematic, ESD protec-
tion diodes are connected from each input to each power supply
rail. These diodes are normally reverse biased, but will turn on
if either input voltage exceeds either supply rail by more than
+0.6 V. Should this condition occur, the input current should
be limited to less than –5 mA. This can be done by placing a
resistor in series with the input(s). The minimum resistor value
should be:
Output Phase Reversal
The AD8591/AD8592/AD8594 are immune to output voltage
phase reversal with an input voltage within the supply voltages
of the device. However, if either of the device’s inputs exceeds
+0.6␣V outside of the supply rails, the output could exhibit
phase reversal. This is due to the ESD protection diodes be-
coming forward biased, thus causing the polarity of the input
terminals of the device to switch.
The technique recommended in the Input Overvoltage Protection
section should be applied in applications where the possibility of
input voltages exceeding the supply voltages exists.
Output Short Circuit Protection
To achieve high output current drive and rail-to-rail performance,
the outputs of the AD859x family do not have internal short cir-
cuit protection circuitry. Although these amplifiers are designed to
sink or source as much as 250␣mA of output current, shorting the
output directly to the positive supply could damage or destroy the
device. To protect the output stage, the maximum output current
should be limited to –250␣mA.
By placing a resistor in series with the output of the amplifier as
shown in Figure 30, the output current can be limited. The
minimum value for RX can be found from Equation 2.(2)
For a +5 V single supply application, RX should be at least 20␣W.
Because RX is inside the feedback loop, VOUT is not affected. The
tradeoff in using RX is a slight reduction in output voltage swing
under heavy output current loads. RX will also increase the effec-
tive output impedance of the amplifier to RO + RX, where RO is
the output impedance of the device.
Figure 30.Output Short Circuit Protection
Power Dissipation
Although the AD859x family of amplifiers are able to provide
load currents of up to 250␣mA, proper attention should be
given to not exceeding the maximum junction temperature for
the device. The equation for finding the junction temperature is
given as:(3)
WhereTJ = AD859x junction temperature
PDISS = AD859x power dissipationJA = AD859x junction-to-ambient thermal resistance
of the package; and
TA = The ambient temperature of the circuit

Partno	Mfg	Dc	Qty	Available	Descript
AD8591ART-REEL \|AD8591ARTREEL	AD	N/a	10568	avai	Single, CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifier with ±250 mA output Current and a Power-Saving Shutdown ...
AD8592ARM-REEL \|AD8592ARMREEL	ANALOG	N/a	25820	avai	Dual, CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifier with ±250 mA Output Current and a Power-Saving Shutdown ...