LTC2641/LTC2642 16-/14-/12-Bit V DACs in OUT 3mm 3mm DFN FEATURES DESCRIPTION n Tiny 3mm 3mm 8-Pin DFN Package The LTC 2641/LTC2642 are families of 16-, 14- and 12-bit n Maximum 16-Bit INL Error: 1LSB over Temperature unbuffered voltage output DACs. These DACs operate from n Low 120A Supply Current a single 2.7V to 5.5V supply and are guaranteed mono- n Guaranteed Monotonic over Temperature tonic over temperature. The LTC2641A-16/LTC2642A-16 n Low 0.5nVsec Glitch Impulse provide 16-bit performance (1LSB INL and 1LSB DNL) n 2.7V to 5.5V Single Supply Operation over temperature. Unbuffered DAC outputs result in low n Fast 1s Settling Time to 16 Bits supply current of 120A and a low offset error of 1LSB. n Unbuffered Voltage Output Directly Drives 60k Loads Both the LTC2641 and LTC2642 feature a reference input n 50MHz SPI/QSPI/MICROWIRE Compatible range of 2V to V . V swings from 0V to V . For DD OUT REF Serial Interface bipolar operation, the LTC2642 includes matched scaling n Power-On Reset Clears DAC Output to Zero Scale resistors for use with an external precision op amp (such (LTC2641) or Midscale (LTC2642) as the LT1678), generating a V output swing at R . REF FB n Schmitt-Trigger Inputs for Direct Optocoupler The LTC2641/LTC2642 use a simple SPI/MICROWIRE Interface n compatible 3-wire serial interface which can be operated Asynchronous CLR Pin n at clock rates up to 50MHz and can interface directly 8-Lead MSOP and 3mm 3mm DFN Packages with optocouplers for applications requiring isolation. A (LTC2641) n power-on reset circuit clears the LTC2641s DAC output 10-Lead MSOP and 3mm 3mm DFN Packages to zero scale and the LTC2642s DAC output to midscale (LTC2642) when power is initially applied. A logic low on the CLR pin asynchronously clears the DAC to zero scale (LTC2641) APPLICATIONS or midscale (LTC2642). These DACs are all specified over n High Resolution Offset and Gain Adjustment the commercial and industrial ranges. n Process Control and Industrial Automation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Automatic Test Equipment SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Data Acquisition Systems TYPICAL APPLICATION Bipolar 16-Bit DAC LTC2642-16 Integral Nonlinearity V REF 2.7V TO 5.5V 2V TO V DD 0.1F 1F 0.1F 1.0 V = 5V DD 0.8 V = 2.5V REF R V REF FB DD LTC2642 2.5V RANGE 0.6 5pF INV 0.4 0.2 BIPOLAR V OUT 1/2 LT1678 V TO V REF REF V 0 OUT + 16-BIT DAC POWER-ON 0.2 RESET 0.4 0.6 CS INL 25C 16-BIT DATA LATCH INL 90C 0.8 SCLK CONTROL INL 45C DIN LOGIC 1.0 CLR 16-BIT SHIFT REGISTER 0 16384 32768 49152 65535 GND CODE 26412 TA01a 26412 TA01b 26412fd 1 For more information www.linear.com/LTC2641 INL (LSB)LTC2641/LTC2642 ABSOLUTE MAXIMUM RATINGS (Note 1) V to GND .................................................. 0.3V to 6V Operating Temperature Range DD CS, SCLK, DIN, LTC2641C/LTC2642C ............................... 0C to 70C CLR to GND .........................0.3V to (V + 0.3V) or 6V LTC2641I/LTC2642I .............................40C to 85C DD REF, V , INV to GND ........0.3V to (V + 0.3V) or 6V Maximum Junction Temperature (Note 2) ............ 125C OUT DD R to INV ....................................................... 6V to 6V Storage Temperature Range .................. 65C to 150C FB R to GND ..................................................... 6V to 6V Lead Temperature (Soldering, 10 sec) ...................300C FB GND to GND (S8 Package) OBSOLETE .... 0.3V to 0.3V PIN CONFIGURATION LTC2641 LTC2641 LTC2641 TOP VIEW TOP VIEW V 1 8 V OUT DD TOP VIEW REF 1 8 GND GND 2 7 GND REF 1 8 GND CS V 2 7 DD 7 V 9 CS 2 DD REF 3 6 DIN SCLK 3 6 V OUT SCLK 3 6 V OUT 5 CLR DIN 4 CS 4 5 SCLK DIN 4 5 CLR MS8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC MSOP 8-LEAD PLASTIC SO DD PACKAGE T = 125C (NOTE 2), = 120C/W 8-LEAD (3mm 3mm) PLASTIC DFN JMAX JA T = 125C, = 110C/W JMAX JA T = 125C (NOTE 2), = 43C/W JMAX JA OBSOLETE PACKAGE EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB LTC2642 LTC2642 TOP VIEW TOP VIEW REF 1 10 GND REF 1 10 GND CS 2 9 V DD CS 2 9 V DD SCLK 3 11 8 R FB SCLK 3 8 R FB DIN 4 7 INV DIN 4 7 INV CLR 5 6 V 6 OUT CLR 5 V OUT MS PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN T = 125C (NOTE 2), = 120C/W JMAX JA T = 125C (NOTE 2), = 43C/W JMAX JA EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB 26412fd 2 For more information www.linear.com/LTC2641