LTC2621 LINER [Linear Technology], LTC2621 Datasheet
LTC2621
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LTC2621 Summary of contents
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... Daisy-chain capability, hardware CLR and asynchronous DAC update (LDAC) pins are included. The LTC2601/LTC2611/LTC2621 incorporate a power-on reset circuit. During power-up, the voltage outputs rise less than 10mV above zero scale; and after power-up, they stay at zero scale until a valid write and update take place ...
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... Any Pin to GND ........................................... – 0. Any Pin to V .............................................– 0.3V CC Maximum Junction Temperature ......................... 125 C Operating Temperature Range LTC2601C/LTC2611C/LTC2621C .......... LTC2601I/LTC2611I/LTC2621I .......... – Storage Temperature Range ................ – 125 C Lead Temperature (Soldering, 10 sec)................ 300 C ELECTRICAL C HARA TERISTICS C temperature range, otherwise specifications are at T unless otherwise noted ...
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... CC DAC Powered Down (Note 2. 2. 4. 2.5V to 5.5V CC Load Current = –100 A Load Current = +100 GND (Note 4) = 2.5V), V unloaded, CC OUT LTC2601/LTC2611/LTC2621 MIN TYP MAX –80 –80 0.04 0.15 7.5mA 0. 124 ...
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... TYP MAX 2.7 2.7 4.8 4.8 5.2 0.80 0.80 1000 1000 12 12 180 180 120 120 100 100 15 15 LTC2601/LTC2611/LTC2621 MIN TYP MAX 200 N = 0.016 5V 4.096V. DAC is stepped 1/4 scale to 3/4 scale REF = 5V 4.096V. DAC is stepped 1LSB between half REF unloaded, ...
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... TEMPERATURE ( C) 2601 G04 Settling to 1LSB V OUT 100 V/DIV CS/LD 2V/DIV 2 s/DIV 4.096V CC REF 1/4-SCALE TO 3/4-SCALE STEP 200pF L L AVERAGE OF 2048 EVENTS LTC2601/LTC2611/LTC2621 Differential Nonlinearity (DNL 4.096V REF 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 16384 32768 49152 65535 CODE ...
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... CODE 2601 G09 LTC2621 Integral Nonlinearity (INL) 2 4.096V REF 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0 1024 2048 3072 4095 CODE 2601 G12 LTC2601/LTC2611/LTC2621 Current Limiting 0.10 CODE = MIDSCALE 0. REF CC 0. REF CC 0.04 0.02 0 –0. REF CC –0. ...
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... V (V) CC 2601 G23 Midscale Glitch Impulse V OUT 10mV/DIV 12nV-s TYP CS/LD 5V/DIV 2601 G26 2.5 s/DIV LTC2601/LTC2611/LTC2621 Gain Error vs Temperature 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –50 –30 – TEMPERATURE ( C) 2601 G21 I Shutdown 450 400 ...
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... LTC2601/LTC2611/LTC2621 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2601/LTC2611/LTC2621 Supply Current vs Logic Voltage 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 LOGIC VOLTAGE (V) Multiplying Bandwidth 0 –3 –6 –9 –12 –15 –18 –21 –24 – (DC –30 REF V (AC) = 0.2V REF P-P –33 CODE = FULL SCALE –36 1k 10k FREQUENCY (Hz) ...
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... DAC voltage outputs to drop to 0V. CMOS and TTL compatible. CS/LD (Pin 5): Serial Interface Chip Select/Load Input. When CS/LD is low, SCK is enabled for shifting data on SDI LTC2601/LTC2611/LTC2621 into the register. When CS/LD is taken high, SCK is disabled and the specified command (see Table 1) is executed. REF (Pin 6): Reference Voltage Input (Pin 7): DAC Analog Voltage Output ...
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... LTC2601/LTC2611/LTC2621 W BLOCK DIAGRA SDI 2 SCK 3 32-BIT SHIFT REGISTER CS/LD 5 SDO DIAGRA S SCK SDI CS/LD SDO LDAC 10 6 REF INPUT DAC REGISTER REGISTER CONTROL DECODE LOGIC LDAC CLR Figure 1a CS/ LDAC Figure 1b ...
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... The data word comprises the 16-, 14- or 12-bit input code, ordered MSB- to-LSB, followed don’t care bits (LTC2601, LTC2611 and LTC2621 respectively). Data can only be transferred to the device when the CS/LD signal is low.The rising edge of CS/LD ends the data transfer and causes the ...
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... X X INPUT WORD (LTC2611) COMMAND DON’T CARE BITS INPUT WORD (LTC2621) COMMAND DON’T CARE BITS Because of this, the devices can be addressed and con- trolled individually by simply concatenating their input words; the first instruction addresses the last device in the chain and so forth ...
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... Resistance here will add directly to the effective DC output impedance of the device (typically 0.05 ). Note that the LTC2601/LTC2611/ LTC2621 are no more susceptible to these effects than other parts of their type; on the contrary, they allow layout-based performance improvements to shine rather than limiting attainable performance with excessive internal resistance ...
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... LTC2601/LTC2611/LTC2621 U OPERATIO 14 2601f ...
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... TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC2601/LTC2611/LTC2621 REF ...
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... LTC2601/LTC2611/LTC2621 U TYPICAL APPLICATIO Demo Circuit DC777 Schematic. Onboard 20-Bit ADC Measures Key Performance Parameters 10 LDAC 4 CLR 2 SDI 3 SCK 5 CS/LD 1 SDO SPI BUS RELATED PARTS PART NUMBER DESCRIPTION LTC1458/LTC1458L Quad 12-Bit Rail-to-Rail Output DACs with Added Functionality LTC1654 Dual 14-Bit Rail-to-Rail V ...