LTC2054_15 Datasheet, PDF (1/16 Pages) Linear Technology – Single/Dual Micropower Zero-Drift Operational Amplifi ers

LTC2054/LTC2055
Single/Dual Micropower
Zero-Drift Operational Amplifiers
FEATURES
DESCRIPTION
n _{Supply Current 150μA (Max per Amplifier)}
Guaranteed from –40°C to 85°C
n _{Offset Voltage 3μV (Max, –40°C to 85°C)}
n _{Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C)}
n _{Guaranteed Specifications from –55°C to 150°C}
(LTC2054MP)
n _{Common Mode Input Range from V}^– _{to V}⁺ _{– 0.5V}
n _{Output Swings Rail-to-Rail}
n _{Voltage Gain: 140dB (Typ)}
n _{PSRR and CMRR: 130dB (Typ)}
n _{Input Bias Current: 1pA (Typ, 25°C)}
n _{Noise: 1.6μVP-P (0.01Hz to 10Hz Typ)}
n _{Supply Operation:}
2.7V to 6V (LTC2054/LTC2055)
2.7V to ±5.5V (LTC2054HV/LTC2055HV)
n _{Low Profile (1mm) TSOT-23, MS8 and}
3mm × 3mm × 0.8mm DFN Packages
APPLICATIONS
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.
The LTC2054/LTC2055, despite their miniature size, feature
uncompromising DC performance. The maximum input
offset voltage and offset drift are 3.0μV and 30nV/°C over
the –40°C to 85°C industrial temperature range. The almost
zero DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of 130dB (typ).
n _{Thermocouple Amplifiers}
n _{Electronic Scales}
n _{Medical Instrumentation}
n _{Strain Gauge Amplifiers}
n _{High Resolution Data Acquisition}
n _{DC Accurate RC Active Filters}
n _{Low Side Current Sense}
n _{Battery-Powered Systems}
The input common mode voltage ranges from the negative
supply up to typically 0.5V below the positive supply. The
open-loop gain is typically 140dB. The LTC2054/LTC2055
also feature a 1.6μV_P-P DC to 10Hz noise and a 500kHz
gain-bandwidth product.
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.
TYPICAL APPLICATION
–48V Low Side Precision Current Sense
BZX84C5V1
V_Z = 5.1
–48V SUPPLY
100Ω
1%
39k
100Ω
–
LTC2054
+
0.003Ω
1% 3W
–
+
I_SENSE, V_SENSE
Q1
ZETEX
ZVN3320F
0.01μF
0.1μF
10k
0.1μF
1%
5V
–
LTC2054
+
–48V LOAD
20545 TA01
V_OUT = 100V_SENSE
V_OS vs Temperature
10
V_S = ±5V
8
6
4
2
0
–2
–4
–6
–8
–10
–55 –20 15 50 85 120 155
TEMPERATURE (°C)
20545 TA01b
20545fc
1