LTC1664 Linear Technology, LTC1664 Datasheet
LTC1664
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LTC1664 Summary of contents
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... Ultralow supply current, power-saving Sleep mode and extremely compact size make the LTC1664 ideal for battery-powered applications, while its ease of use, high performance and wide supply range make it an excellent choice as a general purpose converter. ...
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... OUT A OUT B OUT D REF to GND ................................. – 0. Maximum Junction Temperature ......................... 125 C Operating Temperature Range LTC1664C ............................................. LTC1664I ........................................... – 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) LTC1664 MIN TYP MAX UNITS 10 30 100 120 ...
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... LTC1664 CHARACTERISTICS range, otherwise specifications are SYMBOL PARAMETER t LSB SCK High to CS/LD High 6 t CS/LD Low to SCK High Propagation Delay 8 OUT t SCK Low to CS/LD Low 9 t CLR Pulse Width 10 t CS/LD High to SCK Positive Edge 11 SCK Frequency Note 1: Absolute maximum ratings are those values beyond which the life of a device may be impaired ...
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... Load Regulation vs Output Current REF CODE = 512 1.5 1 0.5 0 –0.5 –1 –1.5 SOURCE SINK –2 –500 OUT LTC1664 Minimum Supply Headroom vs Load Current (Output Sourcing) 1400 V = 4.096V REF V < 1LSB OUT 1200 CODE = 1023 1000 800 600 400 200 ...
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... LTC1664 PIN FUNCTIONS GND (Pin 1): System Ground (Pins 2–5): DAC Analog Voltage Outputs. OUT A OUT D The output range is 1023 REF 1024 REF (Pin 6): Reference Voltage Input CS/LD (Pin 7): Serial Interface Chip Select/Load Input. When CS/LD is low, SCK is enabled for shifting data on D into the register ...
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... DAC A DAC D 10-BIT 10-BIT DAC B DAC C CONTROL ADDRESS LOGIC DECODER SHIFT REGISTER Figure 1 LTC1664 OUT OUT C CLR OUT 1664 1664 F01 7 ...
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... Once in Sleep mode, a load sequence to any other address (including “No Change” addresses 0000 causes the LTC1664 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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... INPUT CODE INPUT WORD INPUT WORD W –1 Figure 2. LTC1664 Register Loading Sequence ADDRESS/CONTROL DAC STATUS Change Load DAC Load DAC Load DAC ...
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... LTC1664 U OPERATIO Voltage Outputs Each of the four rail-to-rail output amplifiers contained in these parts can source or sink up to 5mA. The outputs swing to within a few millivolts of either supply rail when unloaded and have an equivalent output resistance of 85 when driving a load to the rails. The output amplifiers are stable driving capacitive loads up to 1000pF ...
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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 0 512 INPUT CODE (a) LTC1664 REF CC INPUT CODE (c) 1023 = V REF POSITIVE FSE ...
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... OUT 1 OUT A OUT B R2 Similarly V OUT 2 Example: For R1 = 110 and R2 = 11k 0.01 V OUT 1 OUT A OUT B 3.3V 0 – 7 U2B R1 LT1490 COARSE OUT 0 FINE V OUT C 4 CLR 11 D OUT TO OTHER 10 LTC1664s 1664 TA01 OUT2 ...
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... LT1491 OUT B + REF CS/LD 3-WIRE CLK SERIAL INTERFACE U1 1 LTC1664 DAC A DAC D 2 DAC B DAC CONTROL ADDRESS LOGIC DECODER 7 SHIFT REGISTER 8 LTC1664 0 – U2D OUT D LT1491 OUT – U2C OUT C LT1491 ...
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... LTC1664 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 LTC1664 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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... LTC1664 U TYPICAL APPLICATION A Pin Driver CLR LTC1664 DAC A DAC B DAC C DAC D CS/ SCK 8 GND 1 RELATED PARTS PART NUMBER DESCRIPTION LTC1665/LTC1660 Octal 8/10-Bit V DAC in 16-Pin Narrow SSOP OUT LTC1661 Dual 10-Bit V DAC in 8-Lead MSOP Package OUT LTC1663 Single 10-Bit V ...