LTC2063/LTC2064/LTC2065
2µA Supply Current,
Low IB, Zero-Drift Operational Amplifiers
FEATURES
n Low Supply Current: 2μA Maximum (per Amplifier)
n Offset Voltage: 5μV Maximum
n Offset Voltage Drift: 0.02μV/°C Maximum
n Input Bias Current:
n 3pA Typical
n 30pA Maximum, –40°C to 85°C
n 100pA Maximum, –40°C to 125°C
n Integrated EMI Filter (114dB Rejection at 1.8GHz)
n Shutdown Current: 170nA Maximum (per Amplifier)
n Rail-to-Rail Input and Output
n 1.7V to 5.25V Operating Supply Range
n AVOL: 140dB Typical
n Low-Charge Power-Up for Duty Cycled Applications
n Specified Temperature Ranges:
n –40°C to 85°C
n –40°C to 125°C
n SC70, TSOT23, MS8, DFN10, TSSOP14 and
QFN16 Packages
APPLICATIONS
n Signal Conditioning in Wireless Mesh Networks
n Portable Instrumentation Systems
n Low-Power Sensor Conditioning
n Gas Detection
n Temperature Measurement
n Medical Instrumentation
n Energy Harvesting Applications
n Low Power Current Sensing
DESCRIPTION
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.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
Micropower Precision Oxygen Sensor
10M
0.1%
OXYGEN SENSOR
CITY TECHNOLOGY
40XV
100k
0.1%
1.8V
–
100k
0.1%
100Ω
0.1%
LTC2063
+
VOUT = 1V IN AIR
ISUPPLY = 1.4µA (ENABLED)
VSHDN
90nA (SHUTDOWN)
www.citytech.com
2063 TA01
Duty Cycle Lowers System Power
CHARGE
20nC/DIV
VOUT
1V/DIV
VSHDN
2V/DIV
40ms/DIV
2063 TA01b
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