LTC1665 Linear Technology Corporation, LTC1665 Datasheet
LTC1665
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LTC1665 Summary of contents
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... Ultralow supply current, power-saving Sleep mode and extremely compact size make the LTC1665 and LTC1660 ideal for battery-powered applications, while their ease of use, high performance and wide supply range make them excellent choices as general purpose converters. ...
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... OUT A OUT B OUT H REF to GND ................................. – 0. Maximum Junction Temperature ......................... 125 C Operating Temperature Range LTC1665C/LTC1660C ............................ LTC1665I/LTC1660I .......................... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................ 300 C ELECTRICAL C HARA TERISTICS C The denotes specifications which apply over the full operating temperature range, otherwise specifications are ...
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... C = 15pF (Note 6) LOAD (Note 6) (Note 6) (Note 6) Continuous Square Wave (Note 6) Continuous 23% Duty Cycle Pulse (Note 6) Gated Square Wave (Note 6) (Note 6) (Note 6) (Note 6) (Note 6) (Note 6) LTC1665/LTC1660 MIN TYP MAX UNITS 10 30 100 120 ...
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... Continuous Square Wave (Note 6) Continuous 28% Duty Cycle Pulse Gated Square Wave Note i.e., codes 26 and 230 for the LTC1665 or codes 102 and 922 for the LTC1660. Note 6: Guaranteed by design and not production tested. Note 7: Measured at code 4 for the LTC1665 and code 20 for the LTC1660. ...
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... W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Supply Headroom vs Load Current (Output Sourcing) 1400 V = 4.096V REF V < 1LSB OUT 1200 CODE = 255 (LTC1665) CODE = 1023 (LTC1660) 1000 800 600 400 200 (mA) (Sourcing) OUT Large-Signal Step Response REF ...
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... G12 2 1.5 1 0.5 0 –0.5 –1 –1.5 SINK – –500 (mA) 1665/60 G14 (LTC1665) Load Regulation vs Output Current REF CODE = 128 SOURCE SINK 0 500 OUT 1665/60 G11 (LTC1660) Differential Nonlinearity (DNL 4.096V ...
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... CMOS and TTL compatible. D (Pin 10): Serial Interface Data Output. Data appears OUT positive SCK edges after being applied to D OUT May be tied another LTC1665/LTC1660 for daisy- IN chain operaton. CMOS and TTL compatible REF CC CLR (Pin 11): Asynchronous Clear Input. All internal shift and DAC registers are cleared to zero at the falling edge of the CLR signal, forcing the analog outputs to zero scale ...
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... DAC input code and V is the voltage at REF (Pin 6). REF Power-On Reset The LTC1665 clears the outputs to zero scale when power is first applied, making system initialization consistent and repeatable. Power Supply Sequencing The voltage at REF (Pin 6) should be kept within the range – ...
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... INPUT CODE INPUT WORD INPUT WORD W –1 Figure 2a. LTC1665 Register Loading Sequence INPUT CODE INPUT WORD INPUT WORD W –1 Figure 2b ...
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... Once in Sleep mode, a load sequence to any other address (including “No Change” addresses 0000 and 1001-1101 ) causes the LTC1665/LTC1660 to Wake possible to keep one or more chips of a daisy chain in continuous Sleep mode by giving the Sleep instruction to these chips each time the active chips in the chain are updated ...
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... Figure 3. Effects of Rail-to-Rail Operation On a DAC Transfer Curve. (a) Overall Transfer Function (b) Effect of Negative Offset for Codes Near Zero Scale (c) Effect of Positive Full-Scale Error for Input Codes Near Full Scale When REF CC OUTPUT VOLTAGE 0 128 INPUT CODE (a) LTC1665/LTC1660 REF CC INPUT CODE (c) 255 = V REF POSITIVE FSE ...
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... OUT – 8 U2C R1 LT1491 COARSE V V OUT F 10 OUT3 + 0 FINE V OUT E CLR D OUT TO OTHER LTC1665s D IN 1665/60 TA01 R2 >> OUT 1 OUT A OUT B R2 Similarly OUT 2 OUT 3 OUT 4 Example: For R1 = 110 and R2 = 11k 0.01 V OUT 1 OUT A ...
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... REF CS/LD 3-WIRE CLK SERIAL INTERFACE U1 1 LTC1660 DAC A DAC H 2 DAC B DAC G 3 DAC C DAC F 4 DAC D DAC CONTROL ADDRESS LOGIC DECODER 7 SHIFT REGISTER 8 LTC1665/LTC1660 0 – 1 U3A LT1491 V 3 OUT 0 – ...
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... LTC1665/LTC1660 PACKAGE DESCRIPTION 0.007 – 0.0098 (0.178 – 0.249) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE ...
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... DWG # 05-08-1510 0.255 0.015* (6.477 0.381 0.130 0.005 (3.302 0.127) 0.020 (0.508) MIN 0.125 0.100 (3.175) (2.54) MIN BSC LTC1665/LTC1660 0.770* (19.558) MAX 0.045 – 0.065 (1.143 – 1.651) 0.065 (1.651) TYP 0.018 0.003 (0 ...
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... LTC1665/LTC1660 U TYPICAL APPLICATION A Pin Driver CLR LTC1660 DAC H DAC G DAC F DAC E CS/ SCK 8 GND 1 Note: DACs E Through H Can Be Configured for a Second Pin Driver With U2C and U2D of the LT1369 RELATED PARTS PART NUMBER DESCRIPTION LTC1661 Dual 10-Bit V DAC in 8-Lead MSOP Package ...