LTC2704 Quad 12-, 14- and 16-Bit Voltage Output SoftSpan DACs with Readback FEATURES DESCRIPTION The LTC 2704-16/LTC2704-14/LTC2704-12 are serial n Six Programmable Output Ranges: input, 12-, 14- or 16-bit, voltage output SoftSpan DACs Unipolar: 0V to 5V, 0V to 10V that operate from 3V to 5V logic and 5V to 15V analog Bipolar: 5V, 10V, 2.5V, 2.5V to 7.5V supplies. SoftSpan offers six output spanstwo unipolar n Serial Readback of All On-Chip Registers and four bipolarfully programmable through the 3-wire n 1LSB INL and DNL Over the Industrial SPI serial interface. INL is accurate to 1LSB (2LSB for the Temperature Range (LTC2704-14/LTC2704-12) LTC2704-16). DNL is accurate to 1LSB for all versions. n Force/Sense Outputs Enable Remote Sensing n Glitch Impulse: < 2nV-sec Readback commands allow veri cation of any on-chip n Outputs Drive 5mA register in just one 24- or 32- bit instruction cycle. All other n Pin Compatible 12-, 14- and 16-Bit Parts commands produce a rolling readback response from n Power-On and Clear to Zero Volts the LTC2704, dramatically reducing the needed number n 44-Lead SSOP Package of instruction cycles. A Sleep command allows any combination of DACs to be APPLICATIONS powered down. There is also a reset ag and an offset adjustment pin for each channel. n Process Control and Industrial Automation n Direct Digital Waveform Generation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. SoftSpan is a trademark of Linear Technology Corporation. All other n Software Controlled Gain Adjustment trademarks are the property of their respective owners. n Automated Test Equipment BLOCK DIAGRAM V + + AGND V REFM1 REFG1 REF1 REF2 REFG2 REFM2 V 1,8,15,22,31,36 1 2 LTC2704-16 32 44 2 24 21 23 42 43 25 Integral Nonlinearity (INL) VOSB VOSC 40 27 1.0 + V /V = 15V 0.8 V = 5V REF C1B 39 28 C1C 10V RANGE 0.6 RFBB 37 30 RFBC ALL 4 DACS DAC B DAC C 0.4 SUPERIMPOSED OUTB 38 29 OUTC 0.2 1 1 AGNDB 41 26 AGNDC 0 VOSA 4 19 VOSD 0.2 C1A 18 5 C1D 0.4 RFBD RFBA 7 16 0.6 DAC A DAC D 0.8 OUTA 6 17 OUTD 1.0 AGNDA 3 20 AGNDD 0 16384 32768 49152 65535 CODE 34 10 13 11 14 9 35 33 12 2704 BD 2704 TA01b GND V CS/LD SCK SDI CLR LDAC RFLAG SRO DD 2704fd 1 INL (LSB)LTC2704 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) + + Total Supply Voltage V , V to V ........... 0.3V to 36V 1 2 TOP VIEW + + V , V , REF1, REF2, REFM1, REFM2, 1 2 V 1 44 REFM1 OUTx, RFBx, V to GND, AGND, OSx REFG1 2 43 REF1 AGNDx, C1x, REFG1, REFG2 .....................................18V + AGNDA 3 42 V 1 + GND, AGND, AGNDx, C1x, REFG1, REFG2 to V , 1 VOSA 4 41 AGNDB + V , V , REF1, REF2, REFM1, REFM2, OUTx, 2 C1A 5 40 VOSB RFBx, V ...............................................................18V OSx OUTA 6 39 C1B OUTA, RFBA, V , OUTB, RFBB, VOSB, REF1, RFBA 7 38 OUTB OSA + REFM1 to GND, AGND ............... V 0.3V to V + 0.3V V 8 37 RFBB 1 OUTC, RFBC, V , OUTD, RFBD, V , REF2, REFM2 LDAC 9 36 V OSC OSD + CS/LD 10 35 RFLAG to GND, AGND ............................ V 0.3V to V + 0.3V 2 SDI 11 34 V DD V , Digital Inputs/Outputs to GND ............. 0.3V to 7V DD SRO 12 33 GND Digital Inputs/Outputs to V ..................................0.3V DD SCK 13 32 AGND GND, AGNDx, REFG1, REFG2 to AGND ..................0.3V CLR 14 31 V C1x to AGNDx ........................................................0.3V V 15 30 RFBC V to Any Pin ...........................................................0.3V RFBD 16 29 OUTC Maximum Junction Temperature.......................... 150C OUTD 17 28 C1C Operating Temperature Range C1D 18 27 VOSC LTC2704C ................................................ 0C to 70C VOSD 19 26 AGNDC LTC2704I.............................................. 40C to 85C + AGNDD 20 25 V 2 Storage Temperature Range ...................65C to 150C REFG2 21 24 REF2 Lead Temperature (Soldering, 10 sec) .................. 300C V 22 23 REFM2 GW PACKAGE 44-LEAD PLASTIC SSOP T = 125C, = 80C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2704CGW-16 PBF LTC2704CGW-16 TRPBF LTC2704CGW-16 44-Lead Plastic SSOP 0C to 70C LTC2704IGW-16 PBF LTC2704IGW-16 TRPBF LTC2704IGW-16 44-Lead Plastic SSOP 40C to 85C LTC2704CGW-14 PBF LTC2704CGW-14 TRPBF LTC2704CGW-14 44-Lead Plastic SSOP 0C to 70C LTC2704IGW-14 PBF LTC2704IGW-14 TRPBF LTC2704IGW-14 44-Lead Plastic SSOP 40C to 85C LTC2704CGW-12 PBF LTC2704CGW-12 TRPBF LTC2704CGW-12 44-Lead Plastic SSOP 0C to 70C LTC2704IGW-12 PBF LTC2704IGW-12 TRPBF LTC2704IGW-12 44-Lead Plastic SSOP 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: