LTC6255/LTC6256/LTC6257
6.5MHz, 65µA Power
Efficient Rail-to-Rail I/O
Op Amps
FeAtures
Description
Theꢀ LTC®6255/LTC6256/LTC6257ꢀ areꢀ single/dual/quadꢀ
operationalꢀ amplifiersꢀ withꢀ lowꢀ noise,ꢀ lowꢀ power,ꢀ lowꢀ
supplyꢀvoltage,ꢀrail-to-railꢀinput/output.ꢀTheyꢀareꢀunityꢀ
gainꢀstableꢀwithꢀcapacitiveꢀloadꢀupꢀtoꢀ100nF.ꢀTheyꢀfeatureꢀ
6.5MHzꢀgain-bandwidthꢀproduct,ꢀ1.8V/µsꢀslewꢀrateꢀwhileꢀ
consumingꢀonlyꢀ65µAꢀofꢀsupplyꢀcurrentꢀperꢀamplifierꢀop-
eratingꢀonꢀsupplyꢀvoltagesꢀrangingꢀfromꢀ1.8Vꢀtoꢀ5.25V.ꢀTheꢀ
combinationꢀofꢀlowꢀsupplyꢀcurrent,ꢀlowꢀsupplyꢀvoltage,ꢀhighꢀ
gainꢀbandwidthꢀproductꢀandꢀlowꢀnoiseꢀmakesꢀtheꢀLTC6255ꢀ
familyꢀuniqueꢀamongꢀrail-to-railꢀinput/outputꢀopꢀampsꢀwithꢀ
similarꢀsupplyꢀcurrents.ꢀTheseꢀoperationalꢀamplifiersꢀareꢀ
idealꢀforꢀlowꢀpowerꢀandꢀlowꢀnoiseꢀapplications.
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ꢀ GainꢀBandwidthꢀProduct:ꢀ6.5MHz
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ꢀ –3dBꢀBandwidthꢀ(A ꢀ=ꢀ+1):ꢀ4.5MHz
V
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ꢀ LowꢀQuiescentꢀCurrent:ꢀ65µA
ꢀ StableꢀforꢀCapacitiveꢀLoadꢀUpꢀtoꢀ100nF
ꢀ OffsetꢀVoltage:ꢀ350µVꢀMaximum
ꢀ Rail-to-RailꢀInputꢀandꢀOutput
ꢀ SupplyꢀVoltageꢀRange:ꢀ1.8Vꢀtoꢀ5.25V
ꢀ InputꢀBiasꢀCurrent:ꢀ35nAꢀMaximum
ꢀ CMRR/PSRR:ꢀ100dB/100dB
ꢀ ShutdownꢀCurrent:ꢀ7µAꢀMaximum
ꢀ OperatingꢀTemperatureꢀRange:ꢀ–40°Cꢀtoꢀ125°C
ꢀ Singleꢀinꢀ6-LeadꢀTSOT-23ꢀPackage
ꢀ Dualꢀinꢀ8-LeadꢀMS8,ꢀMS10,ꢀTS0T-23,ꢀ2mmꢀ×ꢀ2mmꢀ
ThinꢀDFNꢀPackages
Forꢀapplicationsꢀthatꢀrequireꢀpower-down,ꢀLTC6255ꢀandꢀ
LTC6256ꢀ inꢀ S6ꢀ andꢀ MS10ꢀ packagesꢀ offerꢀ shutdownꢀ
pinsꢀ whichꢀ reducesꢀ theꢀ currentꢀ consumptionꢀ toꢀ 7µAꢀ
maximum.
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ꢀ QuadꢀinꢀMS16ꢀPackage
ApplicAtions
TheꢀLTC6255ꢀfamilyꢀcanꢀbeꢀusedꢀasꢀplug-inꢀreplacementsꢀ
forꢀmanyꢀcommerciallyꢀavailableꢀopꢀampsꢀtoꢀreduceꢀpowerꢀ
orꢀtoꢀimproveꢀinput/outputꢀrangeꢀandꢀperformance.
L,ꢀLT,ꢀLTC,ꢀLTM,ꢀLinearꢀTechnologyꢀandꢀtheꢀLinearꢀlogoꢀareꢀregisteredꢀtrademarksꢀandꢀꢀ
Over-The-TopꢀisꢀaꢀtrademarkꢀofꢀLinearꢀTechnologyꢀCorporation.ꢀAllꢀotherꢀtrademarksꢀareꢀtheꢀ
propertyꢀofꢀtheirꢀrespectiveꢀowners.
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ꢀ MicropowerꢀActiveꢀFilters
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ꢀ PortableꢀInstrumentation
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ꢀ BatteryꢀorꢀSolarꢀPoweredꢀSystems
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ꢀ AutomotiveꢀElectronics
typicAl ApplicAtion
LTC6255ꢀDrivingꢀLTC2361ꢀADC
LowꢀPower,ꢀLowꢀDistortionꢀADCꢀDriver
0
V
S
= –1dBFS, 5kHz
IN
3.3V
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
f
= 125kSps
SNR = 72.5dB
SFDR = 89dB
3.3V
t
t
= 5µs
= 3µs
ACQ
CONV
V
V
REF
DD
+
V
CS
SDO
SCK
IN
324Ω
1%
5mV TO 2V
LTC6255
LTC2361
GND
A
IN
–
470pF
NPO
OV
DD
625567 TA01a
6.34k, 1%
22pF
10k
1%
I
= 540µA TOTAL AT 125kSps
SUPPLY
0
10
20
30
40
50
60
FREQUENCY (kHz)
625567 TA01b
625567f
ꢀ