LTC2055 Datasheet, PDF (1/12 Pages) Linear Technology – Single/Dual Micropower Zero-Drift Operational Amplifiers

FEATURES
■ _{Supply Current 150µA (Max per Amplifier)}
Guaranteed Over Temperature
■ _{Offset Voltage 3µV (Max)}
■ _{Offset Voltage Drift 30nV/°C (Max)}
■ _{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: 1.6µVP-P (0.01Hz to 10Hz Typ)}
■ _{Supply Operation:}
2.7V to 6V (LTC2054/LTC2055)
2.7V to ±5.5V (LTC2054HV/LTC2055HV)
■ _{Low Profile (1mm) SOT-23, MS8 and}
3mm
×
3mm
×
0.8mm
U
DFN
Packages
APPLICATIO S
■ _{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}
LTC2054/LTC2055
Single/Dual
Micropower Zero-Drift
Operational Amplifiers
DESCRIPTIO
The LTC^®2054/LTC2055 are low power, low noise single/
dual zero-drift operational amplifiers available in the SOT-23
(ThinSOT^TM) and MS8 packages. For space limited appli-
cations, 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, fea-
ture uncompromising DC performance. The typical input
offset voltage and offset drift are 0.5µV and 25nV/°C. The
almost zero DC offset and drift are supported with a power
supply rejection ratio (PSRR) and common mode rejec-
tion ratio (CMRR) of more than 130dB.
The input common mode voltage ranges from the negative
supply up to typically 0.5V from 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation
TYPICAL APPLICATIO
–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
Supply Current (per Amplifier)
250
225
200
175
LTC2054
150
125
LTC2055
100
75
50
25
0
–40 –15
5 25 45 70
TEMPERATURE (°C)
85 125
20545 TA01b
sn20545 20545fas
1