LTC2054/LTC2055
1
20545fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Single/Dual Micropower
Zero-Drift Operational Amplifi ers
The LTC
®
2054/LTC2055 are low power, low noise, single/
dual, zero-drift operational amplifi ers with an extended
temperature version (LTC2054MP) that has guaranteed
specifi cations 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 fi ne 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).
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.
–48V Low Side Precision Current Sense
n
Supply Current 150μA (Max per Amplifi er)
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 Specifi cations 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: 1.6µV
P-P
(0.01Hz to 10Hz Typ)
n
Supply Operation:
2.7V to 6V (LTC2054/LTC2055)
2.7V to ±5.5V (LTC2054HV/LTC2055HV)
n
Low Profi le (1mm) TSOT-23, MS8 and
3mm × 3mm × 0.8mm DFN Packages
n
Thermocouple Amplifi ers
n
Electronic Scales
n
Medical Instrumentation
n
Strain Gauge Amplifi ers
n
High Resolution Data Acquisition
n
DC Accurate RC Active Filters
n
Low Side Current Sense
n
Battery-Powered Systems
V
OS
vs Temperature
TEMPERATURE (°C)
V
OS
(µV)
20545 TA01b
10
8
6
4
2
0
–2
–4
–6
–8
–10
–55
155
15 50
85
120
–20
V
S
= ±5V
–
+
0.01μF
0.1μF
0.1μF
0.003Ω
1% 3W
39k
BZX84C5V1
V
Z
= 5.1
–48V SUPPLY
I
SENSE
,V
SENSE
–
+
100Ω
1%
LTC2054
20545 TA01
–
+
10k
1%
5V
V
OUT
= 100V
SENSE
LTC2054
–48V LOAD
Q1
ZETEX
ZVN3320F
100Ω
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.
