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LT6656 - 1

LT6656 - 1
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LT6656 6656fa Output Voltage Temperature Drift LT6656-2.5 TEMPERATURE (°C) –40 2.498 2.499 VOUT (V) 2.500 2.501 2.502 2.503 –20 0 20 40 6652 TA01b 60 80 38 TYPICAL UNITS Basic Connection Typical Application Description 1ìA Precision Series Voltage Reference The LT®6656 is a small precision voltage reference that draws less than 1ìA of supply current and can operate with a supply voltage within 10mV of the output voltage. The LT6656 offers an initial accuracy of 0.05% and temperature drift of 10ppm/°C. The combined low power and precision characteristics are ideal for portable and battery powered instrumentation. The LT6656 can supply up to 5mA of output drive with 65ppm/mA of load regulation, allowing it to be used as the supply voltage and the reference input to a low power ADC. The LT6656 can accept a supply voltage up to 18V and withstand the reversal of the input connections. The LT6656 output is stable with 1ìF or larger output capacitance and operates with a wide range of output capacitor ESR. This reference is fully specified for operation from –40°C to 85°C, and is functional over the extreme temperature range of –55°C to 125°C. Low hysteresis and a consistent temperature drift are obtained through advanced design, processing and packaging techniques. The LT6656 is offered in the 6-lead SOT-23 package. L, LT, LTC and LTM 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. Features Applications n Low Drift A Grade: 10 ppm/°C Max B Grade: 20 ppm/°C Max n High Accuracy A Grade: 0.05% Max B Grade: 0.1% Max n Ultralow Supply Current: 850nA n High Output Drive Current: 5mA Min n Low Dropout Voltage: 10mV Max n Fully Specified from –40°C to 85°C n Operational from –55°C to 125°C n Wide Supply Range to 18V n Reverse Input/Output Protection n Available Output Voltage Options: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V and 5V n Thermal Hysteresis: 25ppm n Low Profile (1mm) ThinSOT™ Package n Precision A/D and D/A Converters n Portable Gas Monitors n Battery- or Solar-Powered Systems n Precision Regulators n Low Voltage Signal Processing n Micropower Remote Sensing 2.51V VIN 18V 0.1ìF 1ìF VOUT 2.5V 6656 TA01a LT6656-2.5 VIN VOUT GND

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LT6656 6656fa Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6656ACS6-4.096#PBF LT6656ACS6-4.096#TRPBF LTFNV 6-Lead Plastic TSOT-23 0°C to 70°C LT6656BCS6-4.096#PBF LT6656BCS6-4.096#TRPBF LTFNV 6-Lead Plastic TSOT-23 0°C to 70°C LT6656AIS6-4.096#PBF LT6656AIS6-4.096#TRPBF LTFNV 6-Lead Plastic TSOT-23 –40°C to 85°C LT6656BIS6-4.096#PBF LT6656BIS6-4.096#TRPBF LTFNV 6-Lead Plastic TSOT-23 –40°C to 85°C LT6656ACS6-5#PBF LT6656ACS6-5#TRPBF LTFNX 6-Lead Plastic TSOT-23 0°C to 70°C LT6656BCS6-5#PBF LT6656BCS6-5#TRPBF LTFNX 6-Lead...

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LT6656 6656fa Electrical Characteristics The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT + 0.5V (for LT6656-1.25, VIN = 2.2V), CL = 1ìF, IL = 0,unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Output Voltage Error LT6656A LT6656B –0.05 –0.10 0.05 0.10 % % Output Voltage Temperature Coefficient (Note 4) LT6656A LT6656B l l 5 12 10 20 ppm/°C ppm/°C Line Regulation VIN = (VOUT + 0.5V) to 18V LT6656-2.048, LT6656-2.5, LT6656-3, LT6656-3.3, LT6656-4.096, LT6656-5 l 2 25 40 ppm/V ppm/V VIN =...

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LT6656 6656fa Electrical Characteristics Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: If the parts are stored outside of the specified temperature range, the output may shift due to hysteresis. Note 3: The stated temperature is typical for soldering of the leads during manual rework. For detailed IR reflow recommendations, refer to the Applications section. Note 4: Temperature coefficient is measured by...

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LT6656 6656fa Typical Performance Characteristics Power Supply Rejection Ratio vs Frequency Dropout Voltage vs Load Current Load Regulation (Sourcing) Load Regulation (Sinking) Line Regulation Supply Current vs Input Voltage 100 10 1 0.1 INPUT VOLTAGE (V) 0 SUPPLY CURRENT (ìA) 6 10 14 18 6656 G03 2 4 8 12 16 20 TA = 125°C TA = 85°C TA = 25°C TA = –55°C 2.048V TO 5V OPTIONS 2.5V OPTION SHOWN VON MOVES WITH VOLTAGE OPTION VON 0.1ì 1ì 10ì 100ì 1m 10m 1000 100 10 1 LOAD CURRENT (A) DROPOUT VOLTAGE (mV) 6656 G04 TA = 125°C TA = 85°C TA = 25°C TA = –55°C 2.048V TO 5V OPTIONS VIN – VOUT INITIAL...

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LT6656 6656fa Output Impedance vs Frequency FREQUENCY (Hz) OUTPUT IMPEDANCE () 6656 G21 10k 1k 100 10 1 10 100 1k 10k VIN = VOUT + 0.5V CL = 1ìF IL = 0 1.25V OPTION 2.5V OPTION 5V OPTION Typical Performance Characteristics Reverse Input Current Reverse Output Current 0 5 10 15 20 100 10 1 OUTPUT VOLTAGE (V) REVERSE OUTPUT CURRENT (ìA) 6656 G12 TA = 125°C TA = 85°C TA = 25°C TA = –55°C ALL OPTIONS VIN = GND INPUT VOLTAGE (V) REVERSE INPUT CURRENT (ìA) 6656 G11 1000 100 10 1 0 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 TA = 125°C TA = 85°C TA = 25°C TA = –55°C ALL OPTIONS VOUT = GND Output Noise...

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LT6656 6656fa Pin Functions GND* (Pin 1): Internal Function. This pin must be tied to ground. GND (Pin 2): Device Ground. NC (Pin 3): Not internally connected. May be tied to VIN, VOUT, GND or floated. VIN (Pin 4): Power Supply. Bypass VIN with a 0.1ìF capacitor to ground. NC (Pin 5): Not internally connected. May be tied to VIN, VOUT, GND or floated. VOUT (Pin 6): Output Voltage. An output capacitor of 1ìF minimum is required for stable operation. Block Diagram NC NC 6656 BD BANDGAP ERROR AMP GND VIN GND VOUT Typical Performance Characteristics Long-Term Drift HOURS 0 LONG TERM DRIFT (ppm)...

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