Document
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 1.6μVP-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 VZ = 5.1
–48V SUPPLY
100Ω 1% 39k
100Ω
–
LTC2054
+
0.003Ω 1% 3W
–
+
ISENSE, VSENSE
Q1 ZETEX ZVN3320F
0.01μF
0.1μF
10k
0.1μF
1%
5V
–
LTC2054
+
–48V LOAD
20545 TA01
VOUT = 100VSENSE
VOS (μV)
VOS vs Temperature
10 VS = ±5V
8 6 4 2 0 –2 –4 –6 –8 –10 –55 –20 15 50 85 120 155
TEMPERATURE (°C)
20545 TA01b
20545fc
1
LTC2054/LTC2055
ABSOLUTE MAXIMUM RATINGS (Note 1)
Total Supply Voltage (V+ to V–) LTC2054/LTC2055 ...................................................7V LTC2054HV/LTC2055HV........................................12V
Input Voltage .......................(V + + 0.3V) to (VS– – 0.3V) Input Current........................................................±10mA Output Short-Circuit Duration ......................... Indefinite
Specified Temperature Range (Note 2) LTC2054C/LTC2055C ............................... 0°C to 70°C LTC2054I/LTC2055I.............................. –40°C to 85°C LTC2054H/LTC2055H.........................–40°C to 125°C LTC2054MP ....................................... –55°C to 150°C
Storage Temperature Range.................. –65°C to 150°C DD Package ....................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec) TSOT23 and MS8 Packages............................. 300°C
PIN CONFIGURATION
OUT 1 V– 2 +IN 3
TOP VIEW
5 V+ 4 –IN
S5 PACKAGE 5-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 250°C/W
TOP VIEW
OUT A 1 –IN A 2 +IN A 3
V– 4
8 V+ 7 OUT B 6 –IN B 5 +IN B
DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN
UNDERSIDE METAL INTERNALLY CONNECTED TO V–
(PCB CONNECTION OPTIONAL)
TJMAX = 125°C, θJA = 160°C/W (NOTE 5)
OUT A 1 –IN A 2 +IN A 3
V– 4
TOP VIEW
8 V+ 7 OUT B 6 –IN B 5 +IN B
MS8 PACKAGE 8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 200°C/W
ORDER INFORMATION
LEAD FREE FINISH LTC2054CS5#PBF LTC2054HVCS5#PBF LTC2054IS5#PBF LTC2054HVIS5#PBF LTC2054HS5#PBF LTC2054HVHS5#PBF LTC2055CDD#PBF LTC2055HVCDD#PBF LTC2055IDD#PBF LTC2055HVIDD#PBF LTC2055HDD#PBF LTC2055HVHDD#PBF LTC2055CMS8#PBF LTC2055HVCMS8#PBF LTC2055IMS8#PBF
TAPE AND REEL LTC2054CS5#TRPBF LTC2054HVCS5#TRPBF LTC2054IS5#TRPBF LTC2054HVIS5#TRPBF LTC2054HS5#TRPBF LTC2054HVHS5#TRPBF LTC2055CDD#TRPBF LTC2055HVCDD#TRPBF LTC2055IDD#TRPBF LTC2055HVIDD#TRPBF LTC2055HDD#TRPBF LTC2055HVHDD#TRPBF LTC2054CMS8#TRPBF LTC2055HVCMS8#TRPBF LTC2055IMS8#TRPBF
2
PART MARKING* PACKAGE DESCRIPTION
LTAGB
5-Lead Plastic TSOT-23
LTAGD
5-Lead Plastic TSOT-23
LTAGB
5-Lead Plastic TSOT-23
LTAGD
5-Lead Plastic TSOT-2.