LTC1655 LINER [Linear Technology], LTC1655 Datasheet
LTC1655
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LTC1655 Summary of contents
Page 1
... SPI/QSPI and MICROWIRE protocols. The CLK input has a Schmitt trigger that allows direct optocoupler interface. The LTC1655 has an onboard 2.048V reference that can be overdriven to a higher voltage. The output swings from 0V to 4.096V when using the internal reference. The typical power dissipation is 3.0mW on a single 5V supply. The LTC1655 is pin compatible with Linear Technology’ ...
Page 2
... REF OUT Maximum Junction Temperature ......................... 125 C Operating Temperature Range LTC1655C .............................................. LTC1655I........................................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are ...
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... CC LOAD (Note 6) CC (Notes 5, 6) REF Overdriven to 2. 4. 100 A OUT Note 4: Digital inputs Note 5: Reference can be overdriven (see Applications Information). Note 6: Guaranteed by design. Not subject to test. LTC1655 = MIN TYP MAX UNITS 2 – 0 ...
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... LTC1655 W U TYPICAL PERFORMANCE CHARACTERISTICS Differential Nonlinearity 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 16,384 32,768 49,152 65,535 DIGITAL INPUT CODE 1655 G01 Minimum Output Voltage vs Output Sink Current 1.0 CODE: ALL 0’s 0.8 0.6 125 C 0 – OUTPUT SINK CURRENT (mA) 1655 F04 Supply Current vs Logic Input Voltage 3 ...
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... IN on the rising edge of the serial clock and is loaded MSB first. The LTC1655 requires a 16-bit word. CS/LD (Pin 3): The TTL Level Input for the Serial Inter- face Enable and Load Control. When CS/LD is low the CLK signal is enabled, so the data can be clocked in. ...
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... The shift register and DAC regis- ter are cleared to all 0s on power-up. Voltage Output The LTC1655 rail-to-rail buffered output can source or sink 5mA over the entire operating temperature range while pulling to within 400mV of the positive supply voltage or ground. The output stage is equipped with a deglitcher that gives a midscale glitch of 12nV-s ...
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... Offset and linearity are defined and tested over the region of the DAC transfer function where no output limiting can occur OUTPUT REF CC VOLTAGE 0 32768 INPUT CODE (a) LTC1655 as shown in Figure 1c. No full-scale limiting CC is less than (V – FSE)/2. REF REF CC INPUT CODE (c) 65535 REF ...
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... This circuit shows how to use an LTC1655 to make an optoisolated digitally controlled 4mA to 20mA process controller. The controller circuitry, including the optoisolation, is powered by the loop voltage that can have a wide range 30V. The 2.048V reference output of the LTC1655 is used for the 4mA offset current and V ® LT 1121-5 IN ...
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... U TYPICAL APPLICATIONS This circuit shows how to make a bipolar output 16-bit DAC with a wide output swing using an LTC1655 and an LT1077. R1 and R2 resistively divide down the LTC1655 output and an offset is summed in using the LTC1655 onboard 2.048V reference and R3 and R4. R5 ensures that P TRANSFER CURVE 4 ...
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... LTC1655 PACKAGE DESCRIPTION 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm Dimensions in inches (millimeters) unless otherwise noted. ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) LTC1655 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1 ...
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... This circuit shows a digitally programmable current source from an external voltage source using an external op amp, an LT1077 and an NPN transistor (2N3440). Any digital word from 0 to 65535 is loaded into the LTC1655 and its output correspondingly swings from 0V to 4.096V. In the configuration shown, R1, R2 resistively divide down the LTC1655 output voltage ...