LTC2063/LTC2064/LTC2065

1

Rev. C

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

2µA Supply Current,

Low IB, Zero-Drift Operational Amplifiers

The LTC®2063/LTC2064/LTC2065 are single, dual,

and quad low power, zero-drift, 20kHz amplifiers. The

LTC2063/LTC2064/LTC2065 enable high resolution mea-

surement at extremely low power levels.

Typical supply current is 1.4µA per amplifier with a max-

imum of 2µA. The available shutdown mode has been

optimized to minimize power consumption in duty-cycled

applications and features low charge loss during pow-

er-up, reducing total system power.

The LTC2063/LTC2064/LTC2065’s self-calibrating cir-

cuitry results in very low input offset (5µV max) and offset

drift (0.02µV/°C). The maximum input bias current is only

20pA and does not exceed 100pA over the full specified

temperature range. The extremely low input bias current

of the LTC2063/LTC2064/LTC2065 allows the use of high

value power-saving resistors in the feedback network.

With its ultralow quiescent current and outstanding pre-

cision, the LTC2063/LTC2064/LTC2065 can serve as a

signal chain building block in portable, energy harvest-

ing and wireless sensor applications.

The LTC2063 is available in 6-lead SC70 and 5-lead

TSOT-23 packages. The LTC2064 is available in 8-lead

MSOP and 10-lead DFN packages. The LTC2065 is avail-

able in 14-lead TSSOP and 16-lead 3mm × 3mm QFN

packages. These devices are fully specified over the –40°C

to 85°C and –40°C to 125°C temperature ranges.

Micropower Precision Oxygen Sensor

Duty Cycle Lowers System Power

APPLICATIONS

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Low Supply Current: 2μA Maximum (per Amplifier)

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Offset Voltage: 5μV Maximum

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Offset Voltage Drift: 0.02μV/°C Maximum

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Input Bias Current:

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3pA Typical

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30pA Maximum, –40°C to 85°C

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100pA Maximum, –40°C to 125°C

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Integrated EMI Filter (114dB Rejection at 1.8GHz)

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Shutdown Current: 170nA Maximum (per Amplifier)

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Rail-to-Rail Input and Output

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1.7V to 5.25V Operating Supply Range

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AVOL: 140dB Typical

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Low-Charge Power-Up for Duty Cycled Applications

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Specified Temperature Ranges:

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–40°C to 85°C

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–40°C to 125°C

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SC70, TSOT23, MS8, DFN10, TSSOP14 and

QFN16 Packages

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Signal Conditioning in Wireless Mesh Networks

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Portable Instrumentation Systems

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Low-Power Sensor Conditioning

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Gas Detection

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Temperature Measurement

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Medical Instrumentation

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Energy Harvesting Applications

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Low Power Current Sensing

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100k

0.1%

100

0.1%

100k

0.1%

10M

0.1%

OXYGEN SENSOR

CITY TECHNOLOGY

40XV

VOUT = 1V IN AIR

ISUPPLY = 1.4µA (ENABLED)

90nA (SHUTDOWN)

www.citytech.com

VSHDN

2063 TA01

1.8V

LTC2063

40ms/DIV

CHARGE

20nC/DIV

VOUT

1V/DIV

VSHDN

2V/DIV

2063 TA01b