LTC1257 Linear Technology Corporation, LTC1257 Datasheet
LTC1257
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LTC1257 Summary of contents
Page 1
... The power supply current is a low = 4.75V to 15.75V 350 A when operating from a 5V supply, making the LTC1257 ideal for battery-powered applications. The space- saving 8-pin SO package and operation with no external components provide the smallest 12-bit D/A system available. ...
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... TTL Input Voltage .......................... – 0. .............................................. – 0. OUT REF ................................................ – 0. Operating Temperature Range LTC1257C ............................................. LTC1257I ........................................ – Maximum Junction Temperature Plastic Package ............................. – 125 C Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C ELECTRICAL CHARACTERISTICS The ...
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... OUT OUT V = GND (Note 15pF LOAD Note 3: DAC switched from all 1s to all 0s, and all 0s to all 1s code. Note 4: Guaranteed with internal V 2.475V to 12V. Tested at 10V. LTC1257 V – 2.7V), unless otherwise noted. REF CC MIN TYP MAX 4.75 15.75 350 600 800 ...
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... LTC1257 W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Supply Voltage vs Load Current #1 5 INTERNAL REF 4 FULL SCALE OUT 4.6 A 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 0.01 0.1 1 OUTPUT LOAD CURRENT (mA) 1257 G01 Supply Current vs Logic Input Voltage 0. 0.54 0.49 0.44 0.39 0. LOGIC VOLTAGE (V) 1257 G04 Full-Scale Voltage vs Temperature 2 ...
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... The output of the shift register which OUT becomes valid on the rising edge of the serial clock. The D pin is driven from GND to V OUT CC inverter. Multiple LTC1257s may be cascaded by connect- ing the D pin to the D pin of the next chip. OUT IN Reference Compensation Resistance vs C ...
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... LTC1257 U U DEFI ITIO S LSB: The least significant bit or the ideal voltage difference between two successive codes. n LSB = (V – V )/2 – The number of digital input bits V = The zero code error or offset of the DAC The full-scale output voltage of the DAC ...
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... CLK D IN MSB LOAD B11 D OUT (PREVIOUS WORD) 5V REGULATOR 12-BIT SHIFT REGISTER 12 12-BIT LATCH 12 2.048V REFERENCE DAC B11 B10 t 8 B10 LTC1257 OUT GND + V OUT – 1257 LSB t 5 B11 B1 B0 CURRENT WORD 1257 TD ...
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... series resistor will suffice. pin of the next chip, Voltage Output The LTC1257 voltage output is able to pull within 2. while sourcing 2mA. A internal NMOS transistor with CC a 200 equivalent impedance pulls the output to ground. ...
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... Single 5V Control System with Shutdown 5V 10k V – 0.1 F OUT CLK LTC1297 ADC +IN V GND REF 47k LTC1050 100k V V REF 74k CONTORL V LTC1257 OUT OUTPUT GND LTC1257 P 1257 TA02 10 F CB/POWER DOWN CLK DATA P DAC LOAD CLK LOAD D OUT 1257 TA04 9 ...
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... LTC1257 PACKAGE DESCRIPTIO 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 Package 8-Lead PDIP (Narrow ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LTC1257 6 5 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC SO8 1298 ...
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... Rail-to-Rail Micropower DAC in MSOP, V LTC1654 Dual 14-Bit V DAC OUT 16 Bit LTC1655(L) Single 16-Bit V DAC with Serial Interface in SO-8 OUT Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 Driving LTC1257 with Optoisolators CLK REF 6 D ...