LTC2054/LTC2055
Single/Dual Micropower
Zero-Drift Operational Amplifiers
DESCRIPTION
FEATURES
The LTC®2054/LTC2055 are low power, low noise, single/
dual, zero-drift operational amplifiers with an extended
temperature version (LTC2054MP) that has guaranteed
specifications from –55°C to 150°C. They are available
in TSOT-23 (ThinSOT™) and MS8 packages. For space
limited applications, the LTC2055 is also available in a
3mm × 3mm × 0.8mm dual fine pitch leadless package
(DFN). They operate from a single 2.7V minimum supply
and support 5V applications. The current consumption
is typically 150μA for the LTC2054 and 130μA/amp for
the LTC2055.
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Supply Current 150μA (Max per Amplifier)
Guaranteed from –40°C to 85°C
Offset Voltage 3μV (Max, –40°C to 85°C)
Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C)
Guaranteed Specifications from –55°C to 150°C
(LTC2054MP)
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Common Mode Input Range from V to V – 0.5V
Output Swings Rail-to-Rail
Voltage Gain: 140dB (Typ)
PSRR and CMRR: 130dB (Typ)
Input Bias Current: 1pA (Typ, 25°C)
Noise: 1.6μV (0.01Hz to 10Hz Typ)
P-P
TheLTC2054/LTC2055,despitetheirminiaturesize,feature
uncompromising DC performance. The maximum input
offset voltage and offset drift are 3.0μV and 30nV/°C over
the –40°Cto85°Cindustrialtemperaturerange.Thealmost
zero DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of 130dB (typ).
Supply Operation:
2.7V to 6V (LTC2054/LTC2055)
2.7V to 5.5V (LTC2054HV/LTC2055HV)
Low Profile (1mm) TSOT-23, MS8 and
3mm × 3mm × 0.8mm DFN Packages
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APPLICATIONS
Theinputcommonmodevoltagerangesfromthenegative
supply up to typically 0.5V below the positive supply. The
open-loop gain is typically 140dB. The LTC2054/LTC2055
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Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
DC Accurate RC Active Filters
Low Side Current Sense
Battery-Powered Systems
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also feature a 1.6μV DC to 10Hz noise and a 500kHz
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gain-bandwidth product.
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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TYPICAL APPLICATION
VOS vs Temperature
–48V Low Side Precision Current Sense
10
V
S
=
5V
10k
1%
8
6
Q1
0.1μF
ZETEX
ZVN3320F
5V
4
100Ω
–
2
1%
0.01μF
–
+
39k
V
= 100V
SENSE
LTC2054
0
OUT
LTC2054
–2
–4
–6
–8
–10
+
0.1μF
100Ω
BZX84C5V1
= 5.1
V
Z
0.003Ω
1% 3W
–48V SUPPLY
–48V LOAD
–55
–20
15
50
85
120
155
20545 TA01
+
–
I
, V
TEMPERATURE (°C)
SENSE SENSE
20545 TA01b
20545fc
1