Data Sheet June 2007 FN6312.1 Dual Quad Micropower Single Supply
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ISL28286, ISL28486
Data Sheet June 2007 FN6312.1
Dual Quad Micropower Single Supply Rail-to-Rail Input Output (RRIO) Precision
ISL28286 ISL28486 dual quad channel micropower operational amplifiers optimized single supply operation over 2.4V range. They operated from lithium cell Ni-Cd batteries. equivalent performance single channel reference EL8186. These devices feature Input Range Enhancement Circuit (IREC) which enables them maintain CMRR performance input voltages above positive supply rail down negative supply. output operation rail rail. ISL28286 ISL28486 draw minimal supply current while meeting excellent DC-accuracy, AC-performance, noise output drive specifications. ISL28286 contains power down enable that reduces power supply current less than disabled state.
Features
power 120µA typical supply current (ISL28286) 600µV maximum offset voltage 500pA typical input bias current 400kHz typical gain-bandwidth product 115dB typical PSRR CMRR Single supply operation down 2.4V Input capable swinging above (ground sensing) Rail-to-rail input output (RRIO) Pb-free plus anneal available (RoHS compliant)
Applications
Battery- solar-powered systems 25mA current loops Handheld consumer products Medical devices
Pinouts
ISL28286 MSOP) VIEW
IN+_A EN_A EN_B IN+_B IN-_A OUT_A OUT_B IN-_B
Thermocouple amplifiers Photodiode pre-amps probe amplifiers
Ordering Information
PART NUMBER (Note) ISL28286FUZ* ISL28486FAZ* PART MARKING 8286Z 28486 PACKAGE (Pb-free) PKG. DWG.
MSOP MDP0043 QSOP MDP0040
*Add "-T7" suffix tape reel. Please refer TB347 details reel specifications. ISL28486 QSOP) VIEW
OUT_A IN-_A IN+_A IN+_B IN-_B OUT_B OUT_D IN-_D IN+_D IN+_C IN-_C OUT_C
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials 100% matte plate termination finish, which RoHS compliant compatible with both SnPb Pb-free soldering operations. Intersil Pb-free products classified Pb-free peak reflow temperatures that meet exceed Pb-free requirements IPC/JEDEC STD-020.
CAUTION: These devices sensitive electrostatic discharge; follow proper Handling Procedures. 1-888-INTERSIL 1-888-468-3774 Intersil (and design) registered trademark Intersil Americas Inc. Copyright Intersil Americas Inc. 2006, 2007. Rights Reserved other trademarks mentioned property their respective owners.
ISL28286, ISL28486
Absolute Maximum Ratings +25°C)
Supply Voltage 5.5V Supply Turn Voltage Slew Rate 1V/s Differential Input Current Differential Input Voltage 0.5V Input Voltage 0.5V 0.5V Output Short-Circuit Duration. Indefinite Rating Human Body Model .3kV Machine Model .300V
Thermal Information
Thermal Resistance (°C/W) MSOP Package QSOP Package Output Short-Circuit Duration .Indefinite Ambient Operating Temperature Range .-40°C +125°C Storage Temperature Range .-65°C +150°C Operating Junction Temperature +125°C Pb-free reflow profile .see link below
CAUTION: operate near maximum ratings listed extended periods time. Exposure such conditions adversely impact product reliability result failures covered warranty. IMPORTANT NOTE: parameters having Min/Max specifications guaranteed. Typical values information purposes only. Unless otherwise noted, tests specified temperature pulsed tests, therefore:
Electrical Specifications
0V,VCM 2.5V, Open, +25°C unless otherwise specified. Boldface limits apply over operating temperature range, -40°C +125°C. Temperature data established characterization. DESCRIPTION CONDITIONS (Note (Note UNIT
PARAMETER SPECIFICATIONS CMIR CMRR PSRR AVOL
Input Offset Voltage Input Offset Voltage Temperature Input Offset Current Input Bias Current Common-Mode Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain Guaranteed CMRR 2.4V 0.5V 4.5V, 100k 0.5V 4.5V,
-600 -650
µV/°C
-2.5 -2.5 -2.5 4.990 4.970 4.800 4.750 4.996 4.880
±0.25
V/mV V/mV
±0.5
VOUT
Maximum Output Voltage Swing
Output low, 100k Output low, Output high, 100k Output high,
IS,ON
Supply Current, Enabled
ISL28286, channels enabled. ISL28486, channels enabled.
IS,OFF
Supply Current, Disabled
ISL28286, channels disabled.
FN6312.1 June 2007
ISL28286, ISL28486
Electrical Specifications
0V,VCM 2.5V, Open, +25°C unless otherwise specified. Boldface limits apply over operating temperature range, -40°C +125°C. Temperature data established characterization. (Continued) DESCRIPTION Short Circuit Sourcing Capability Short Circuit Sinking Capability Supply Operating Range High Level (ISL28286) Level (ISL28286 Input High Current (ISL28286) Input Current (ISL28286) V0.7 VCONDITIONS (Note (Note UNIT
PARAMETER ISC+ ISCVSUPPLY VENH VENL IENH IENL
SPECIFICATONS Gain Bandwidth Product Input Noise Voltage Peak-to-Peak Input Noise Voltage Density CMRR 60Hz PSRR+ 120Hz PSRR- 120Hz Input Noise Current Density Input Common Mode Rejection Ratio Power Supply Rejection Ratio (V+) Power Supply Rejection Ratio (V-) 100, 100k, 0.1Hz 10Hz 1kHz 1kHz 1VP-P, ±12V ±2.5V, VSOURCE 1VP-P, ±12V ±2.5V VSOURCE 1VP-P, 0.18 -105 µVP-P nV/Hz pA/Hz
TRANSIENT RESPONSE Slew Rate Enable Output Turn-on Delay Time, VOUT, (ISL28286) Enable Output Turn-off Delay Time, VOUT, (ISL28286) NOTE: Parts 100% tested +25°C. Over temperature limits established characterization production tested.
±0.10 ±0.09 ±0.17 ±0.20 ±0.25
V/µs
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
GAIN (dB) 100k FREQUENCY (Hz) VOUT 50mVp-p 0/RG ±2.5V ±2.5V ±1.2V GAIN (dB) ±1.2V ±2.5V 2.7pF 99.02 ±1.0V 221k 2.23k 100k FREQUENCY (Hz) ±1.25V
FIGURE FREQUENCY RESPONSE SUPPLY VOLTAGE
FIGURE FREQUENCY RESPONSE SUPPLY VOLTAGE
GAIN (dB) PHASE 100k FREQUENCY (Hz) GAIN
PHASE -120 GAIN (dB)
PHASE
PHASE
GAIN
-100 -150
100k
FREQUENCY (Hz)
FIGURE AVOL FREQUENCY 100k LOAD
FIGURE AVOL FREQUENCY LOAD
PSRR (dB) PSRR 5VDC VSOURCE 1VP-P 100k 100k PSRR CMRR(dB)
5VDC VSOURCE 1VP-P 100k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE PSRR FREQUENCY
FIGURE CMRR FREQUENCY
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
10.00 CURRENT NOISE (pA/Hz) VOLTAGE NOISE (nV/Hz)
(Continued)
1.00
0.10
0.01 100k FREQUENCY (Hz)
100k FREQUENCY (Hz)
FIGURE CURRENT NOISE FREQUENCY
FIGURE VOLTAGE NOISE FREQUENCY
2.56 VOLTAGE NOISE (1µV/DIV) 2.54 2.52 VOLTS 2.50 2.48 2.46 4.5µVP-P 2.44 2.42 TIME (1s/DIV) TIME (µs) 5VDC VOUT 0.1VP-P VOUT
FIGURE 0.1Hz 10Hz INPUT VOLTAGE NOISE
FIGURE SMALL SIGNAL TRANSIENT RESPONSE
VOUT TIME (µs) 0.1V/DIV 5VDC VOUT 0.1VP-P VOUT 1V/DIV INPUT 200mVP-P
VOLTS
VOUT
10µs/DIV
FIGURE LARGE SIGNAL TRANSIENT RESPONSE
FIGURE ENABLE OUTPUT DELAY TIME
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
-100 OPEN 100k, +1000 I-BIAS (nA)
(Continued)
-100 OPEN 100k, +1000
FIGURE INPUT OFFSET VOLTAGE COMMON-MODE INPUT VOLTAGE
FIGURE INPUT OFFSET CURRENT COMMON-MODE INPUT VOLTAGE
CURRENT
1150 MEDIAN
SUPPLY CURRENT (µA)
SUPPLY VOLTAGE
TEMPERATURE (°C)
FIGURE ISL28286 SUPPLY CURRENT SUPPLY VOLTAGE
FIGURE ISL28486 SUPPLY CURRENT TEMPERATURE, ±2.5V ENABLED,
CURRENT
1150 MEDIAN MEDIAN -200 -400 -600
-800
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE ISL28286 SUPPLY CURRENT TEMPERATURE, ±2.5V DISABLED,
FIGURE TEMPERATURE, ±2.5V
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
IBIAS (nA) MEDIAN -200 -400 -600 -800 1150 -0.5 -1.0 -1.5 -2.0 MEDIAN
(Continued)
1150
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE TEMPERATURE, ±1.2V
FIGURE IBIAS TEMPERATURE, ±2.5V
IBIAS (nA) -0.5 -1.0 -1.5 -2.0 -2.5
1150 IBIAS (nA) MEDIAN
-0.5 -1.0 -1.5 MEDIAN 1150
-2.0
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE IBIAS TEMPERATURE, ±2.5V
FIGURE IBIAS TEMPERATURE, ±1.2V
IBIAS (nA)
1150
(nA) MEDIAN -0.5 -1.0 -1.5 -2.0
1150
MEDIAN
-0.5 -1.0 -1.5 -2.0
-2.5
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE IBIAS TEMPERATURE, ±1.2V
FIGURE TEMPERATURE, ±2.5V
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
1070 AVOL (V/mV) MEDIAN AVOL (V/mV) 1150 1150 MEDIAN
(Continued)
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE AVOL TEMPERATURE, ±2.5V, 100k
FIGURE AVOL TEMPERATURE, ±2.5V,
1150 PSRR (dB) MEDIAN
1150 MEDIAN
CMRR (dB)
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE CMRR TEMPERATURE, +2.5V -2.5V, ±2.5V
FIGURE PSRR TEMPERATURE, ±1.2V ±2.75V
4.91 1150 4.90 4.89 VOUT 4.88 4.87 4.86 4.85 VOUT
4.9972 1150 4.9970 4.9968 4.9966 4.9964 4.9962 4.9960 4.9958 4.9956 MEDIAN
MEDIAN
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE VOUT HIGH TEMPERATURE, ±2.5V,
FIGURE VOUT HIGH TEMPERATURE, ±2.5V, 100k
FN6312.1 June 2007
ISL28286, ISL28486 Typical Performance Curves 0V,VCM 2.5V, Open
1150 VOUT (mV) VOUT (mV) MEDIAN MEDIAN 1150
(Continued)
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE VOUT TEMPERATURE, ±2.5V,
FIGURE VOUT TEMPERATURE, ±2.5V, 100k
OUTPUT SHORT CIRCUIT CURRENT (mA)
1150 MEDIAN
OUTPUT SHORT CIRCUIT CURRENT (mA)
1150 MEDIAN
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE OUTPUT SHORT CIRCUIT CURRENT TEMPERATURE, -2.55V, ±2.5V
FIGURE OUTPUT SHORT CIRCUIT CURRENT TEMPERATURE, -2.55V, ±2.5V
0.24 1150 0.22 SLEW RATE (V/µs) SLEW RATE (V/µs) 0.20 0.18 0.16 0.14 0.12 0.10 MEDIAN
0.24 1150 0.22 0.20 0.18 0.16 0.14 0.12 0.10 MEDIAN
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE SLEW RATE TEMPERATURE, VOUT 1.5V,
FIGURE SLEW RATE TEMPERATURE, VOUT 1.5V,
FN6312.1 June 2007
ISL28286, ISL28486 Descriptions
ISL28286 ISL28486 MSOP) QSOP) NAME EQUIVALENT CIRCUIT IN+_A EN_A VEN_B IN+_B IN-_B OUT_B OUT_A IN-_A OUT_C IN-_C IN+_C IN+_D IN-_D OUT_D Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit Circuit DESCRIPTION Amplifier non-inverting input Amplifier enable internal pull-down; Logic selects disabled state; Logic selects enabled state. Negative power supply Amplifier enable with internal pull-down; Logic selects disabled state; Logic selects enabled state. Amplifier non-inverting input Amplifier inverting input Amplifier output Positive power supply Amplifier output Amplifier inverting input Amplifier output Amplifier inverting input Amplifier non-inverting input Amplifier non-inverting input Amplifier inverting input Amplifier output internal connection
LOGIC VCIRCUIT CIRCUIT VVCIRCUIT
CAPACITIVELY COUPLED CLAMP
CIRCUIT
FN6312.1 June 2007
ISL28286, ISL28486 Applications Information
Introduction
ISL28286 ISL28486 dual quad BiCMOS rail-to-rail input, output (RRIO) micropower precision operational amplifiers. These devices designed operate from single supply (2.4V 5.0V) dual supplies (±1.2V ±2.5V) while drawing only 120A (ISL28286) supply current. This combination power precision performance makes these devices suitable solar battery power applications. direction. Both parts with 100k load will swing within supply rails.
Enable/Disable Feature
ISL28286 offers pins (EN_A EN_B) which disable when pulled least 2.0V. disabled state (output high impedance state), part consumes typically 4µA. disabling part, multiple parts connected together MUX. outputs tied together parallel channel selected pins. pins also have internal pull-down. left open, pins will pull negative rail will enabled default.
Rail-to-Rail Input
Many rail-to-rail input stages differential input pairs, long-tail PFET) NFET). Severe penalties have paid this circuit topology. input signal moves from supply rail another, operational amplifier switches from input pair other causing drastic changes input offset voltage undesired change magnitude polarity input offset current. ISL28286 ISL28486 achieve input rail-to-rail without sacrificing important precision specifications degrading distortion performance. devices' input offset voltage exhibits smooth behavior throughout entire commonmode input range. input bias current versus common-mode voltage range gives undistorted behavior from typically down negative rail higher than rail (0.5V higher than when equals 5V).
Using Only Channel
ISL28286 ISL28486 dual quad channel amps. application only requires channel when using ISL28286 less than channels when using ISL28486, user must configure unused channel(s) prevent them from oscillating. unused channel(s) will oscillate input output pins floating. This will result higher than expected supply currents possible noise injection into channel being used. proper prevent this oscillation short output negative input ground positive input shown Figure 37).
ISL28286 ISL28486
Input Protection
input terminals have internal protection diodes positive negative supply rails, limiting input voltage within diode beyond supply rails. Both parts have additional back-to-back diodes across input terminals. overdriving inputs necessary, external input current must never exceed 5mA. External series resistors used external protection limit excessive external voltage current from damaging inputs.
FIGURE PREVENTING OSCILLATIONS UNUSED CHANNELS
Proper Layout Maximizes Performance
achieve maximum performance high input impedance offset voltage ISL28286 ISL28486, care should taken circuit board layout. board surface must remain clean free moisture avoid leakage currents between adjacent traces. Surface coating circuit board will reduce surface moisture provide humidity barrier, reducing parasitic resistance board. When input leakage current concern, guard rings around amplifier inputs will further reduce leakage currents. Figure shows guard ring example unity gain amplifier that uses impedance amplifier output same voltage high impedance input eliminate surface leakage. guard ring does need specific width, should form continuous loop around both inputs. further reduction leakage currents, components mounted board using Teflon standoff insulators.
Input Bias Current Compensation
ISL28286 ISL28486 contain input bias cancellation circuit which reduces bias currents down typical 500pA while maintaining excellent bandwidth micro-power operational amplifier. input stage transistors still biased with adequate current speed canceling circuit sinks most base current, leaving small fraction input bias current.
Rail-to-Rail Output
pair complementary MOSFET devices used achieve rail-to-rail output swing. NMOS sinks current swing output negative direction. PMOS sources current swing output positive
FN6312.1 June 2007
ISL28286, ISL28486
HIGH IMPEDANCE INPUT
where: PDMAXTOTAL maximum power dissipation each amplifier package (PDMAX) PDMAX each amplifier calculated follows:
OUTMAX SMAX OUTMAX (EQ.
FIGURE GUARD RING EXAMPLE UNITY GAIN AMPLIFIER
where: TMAX Maximum ambient temperature Thermal resistance package PDMAX Maximum power dissipation amplifier Supply voltage (Magnitude IMAX Maximum supply current amplifier VOUTMAX Maximum output voltage swing application Load resistance
Current Limiting
ISL28286 ISL28486 have internal currentlimiting circuitry. output shorted, possible exceed Absolute Maximum Rating output current power dissipation, potentially resulting destruction device.
Power Dissipation
possible exceed +150°C maximum junction temperatures under certain load power-supply conditions. therefore important calculate maximum junction temperature (TJMAX) applications determine power supply voltages, load conditions, package type need modified remain safe operating area. These parameters related follows:
JMAX MAXTOTAL (EQ.
FN6312.1 June 2007
ISL28286, ISL28486 Mini Package Family (MSOP)
0.25 (N/2)+1
MDP0043
MINI PACKAGE FAMILY MILLIMETERS SYMBOL MSOP8 1.10 0.10 0.86 0.33 0.18 3.00 4.90 3.00 0.65 0.55 0.95 MSOP10 1.10 0.10 0.86 0.23 0.18 3.00 4.90 3.00 0.50 0.55 0.95 TOLERANCE Max. ±0.05 ±0.09 +0.07/-0.08 ±0.05 ±0.10 ±0.15 ±0.10 Basic ±0.15 Basic Reference NOTES Rev. 2/07 NOTES: Plastic metal protrusions 0.15mm maximum side included.
I.D.
(N/2)
SEATING PLANE 0.10 LEADS
0.08
DETAIL
Plastic interlead protrusions 0.25mm maximum side included. Dimensions "E1" measured Datum Plane "H". Dimensioning tolerancing ASME Y14.5M-1994.
GAUGE PLANE DETAIL
0.25
FN6312.1 June 2007
ISL28286, ISL28486 Quarter Size Outline Plastic Packages Family (QSOP)
(N/2)+1
MDP0040
QUARTER SIZE OUTLINE PLASTIC PACKAGES FAMILY INCHES SYMBOL QSOP16 QSOP24 QSOP28 TOLERANCE NOTES
I.D. MARK
0.068 0.006 0.056 0.010 0.008 0.193 0.236 0.154 0.025 0.025 0.041
0.068 0.006 0.056 0.010 0.008 0.341 0.236 0.154 0.025 0.025 0.041
0.068 0.006 0.056 0.010 0.008 0.390 0.236 0.154 0.025 0.025 0.041
Max. ±0.002 ±0.004 ±0.002 ±0.001 ±0.004 ±0.008 ±0.004 Basic ±0.009 Basic Reference
Rev. 2/07
0.010
(N/2)
SEATING PLANE 0.004 0.007
DETAIL
NOTES: Plastic metal protrusions 0.006" maximum side included. Plastic interlead protrusions 0.010" maximum side included. Dimensions "E1" measured Datum Plane "H". Dimensioning tolerancing ASME Y14.5M-1994.
0.010 GAUGE PLANE 4°±4° DETAIL
Intersil U.S. products manufactured, assembled tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications viewed www.intersil.com/design/quality
Intersil products sold description only. Intersil Corporation reserves right make changes circuit design, software and/or specifications time without notice. Accordingly, reader cautioned verify that data sheets current before placing orders. Information furnished Intersil believed accurate reliable. However, responsibility assumed Intersil subsidiaries use; infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Intersil subsidiaries.
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FN6312.1 June 2007
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