Datasheet LT6370 (Analog Devices)

LT6370 25µV, 0.3µV/°C, Low Noise Instrumentation Amplifier
FEATURES DESCRIPTION
n
Single Gain Set Resistor: G = 1 to >1000
The LT®6370 is a gain programmable, high precision n
Excellent DC Precision
instrumentation amplifier that delivers industry leading n
Input Offset Voltage: 25μV Max
DC precision. This high precision enables smaller signals n
Input Offset Voltage Drift: 0.3μV/°C Max
to be sensed and eases calibration requirements, particu- n
Low Gain Error: 0.01% Max (G = 1)
larly over temperature. n
Low Gain Drift: 30ppm/°C Max (G > 1)
The LT6370 uses a proprietary high performance bipolar n
High DC CMRR: 94dB Min (G = 1)
process which enables industry leading accuracy coupled n Input Bias Current: 400pA Max with exceptional long-term stability. The LT6370 is laser n 3.1MHz –3dB Bandwidth (G = 1) trimmed for very low input offset voltage (25µV) and high n Low Noise: CMRR (94dB, G = 1). Proprietary on-chip test capability n 0.1Hz to 10Hz Noise: 0.2μVP-P allows the input offset voltage drift (0.3µV/°C) and gain n 1kHz Voltage Noise: 7nV/√Hz drift (30ppm/°C) to be guaranteed with automated testing n Integrated Input RFI Filter on the S8E package. n Wide Supply Range 4.75V to 35V n Specified Temperature Ranges: In addition to excellent DC specifications, the LT6370’s –40°C to 85°C, –40°C to 125°C wide bandwidth (3.1MHz, G = 1) and fast settling time n MS8, S8E and 10-pin 3mm × 3mm DFN Packages allow it to operate well in multiplexed applications. EMI filtering is integrated on the LT6370’s inputs to maintain accuracy in the presence of harsh RF interference.
APPLICATIONS
The LT6370 is available in a compact 8-pin MSOP or S8E n Bridge Amplifier which use the conventional instrumentation amplifier n Data Acquisition pin-out as well as a 10-pin 3mm × 3mm DFN. The S8E n Multiplexed Signals package is also offered as an A grade which has superior n Thermocouple Amplifier DC specifications. The LT6370 is fully specified over the n Strain Gauge Amplifier –40°C to 85°C and –40°C to 125°C temperature ranges. n Medical Instrumentation All registered trademarks and trademarks are the property of their respective owners. n Transducer Interfaces n Differential to Single-Ended Conversion
TYPICAL APPLICATION Distribution of Input Offset Voltage Drift, MS8 Package
+ 50 10V TA = –40°C TO 85°C 45 117 UNITS 40 350Ω 350Ω RG 35 243Ω LT6370A 30 6370 TA01a REF 350Ω 350Ω – 25 AGE OF UNITS (%) 20 15 PRECISION BRIDGE TRANSDUCER LT6370A MONOLITHIC PERCENT 10 INSTRUMENTATION AMPLIFIER G = 100, RG = ±0.1%, ±10ppm TC 5 0–0.5–0.4–0.3–0.2–0.1 0 0.1 0.2 0.3 0.4 0.5 INPUT OFFSET VOLTAGE DRIFT (µV/°C) 6370 TA01b Rev. 0 Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Theory of Operation Applications Information Typical Applications Package Description Typical Application Related Parts