LTC2066/LTC2067/LTC2068
10µA Supply Current,
Low IB, Zero-Drift Operational Amplifier
FEATURES
n Low Supply Current: 10μA Maximum (per Amplifier)
n Offset Voltage: 5μV Maximum
n Offset Voltage Drift: 0.02μV/°C Maximum
n Input Bias Current:
n 5pA Typical
n 50pA Maximum, –40°C to 85°C
n 150pA Maximum, –40°C to 125°C
n Integrated EMI Filter (90dB 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®2066/LTC2067/LTC2068 are single, dual,
and quad low power, zero-drift, 100kHz amplifiers. The
LTC2066/LTC2067/LTC2068 enable high resolution mea-
surement at extremely low power levels.
Typical supply current is 7.5µA per amplifier with a maxi-
mum of 10µA. The available shutdown mode has been
optimized to minimize power consumption in duty-cycled
applications and features low charge loss during power-
up, reducing total system power.
The LTC2066/LTC2067/LTC2068’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
35pA and does not exceed 150pA over the full specified
temperature range. The extremely low input bias current
of the LTC2066/LTC2067/LTC2068 allows the use of high
value power-saving resistors in the feedback network.
With its ultralow quiescent current and outstanding pre-
cision, the LTC2066/LTC2067/LTC2068 can serve as a
signal chain building block in portable, energy harvest-
ing and wireless sensor applications.
The LTC2066 is available in 6-lead SC70 and 5-lead TSOT-
23 packages. The LTC2067 is available in 8-lead MSOP
and 10-lead DFN packages. The LTC2068 is available 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
Precision Micropower Low Side Current Sense
VIN
LOAD
10k
0.1%
10k*
0.1%
1M
0.1%
3.3V
–
LTC2066
+
VOUT = 10 • ISENSE
1mV TO 2.5V
ISENSE
100µA TO 250mA
100mΩ
0.1%
2066 TA01a
*RESISTOR CANCELS OUT PARASITIC SEEBECK EFFECT VOLTAGE
Output Voltage vs Sense Current
2.5
1
0.1
0.01
0.001
0.1
1
10
ISENSE (mA)
100 250
2066 TA01b
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For more information www.analog.com
Rev. B
1
