LTC2642CMS-14#PBF Linear Technology, LTC2642CMS-14#PBF Datasheet
LTC2642CMS-14#PBF
Specifications of LTC2642CMS-14#PBF
Available stocks
Related parts for LTC2642CMS-14#PBF
LTC2642CMS-14#PBF Summary of contents
Page 1
... DAC to zero scale (LTC2641) or midscale (LTC2642). These DACs are all specifi ed over the commercial and industrial ranges. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. V REF ...
Page 2
LTC2641/LTC2642 ABSOLUTE MAXIMUM RATINGS V to GND .................................................. –0. CS, SCLK, DIN, CLR to GND ........................ –0. REF , V , INV to GND ......... –0. OUT R to INV ....................................................... –6V to ...
Page 3
... LTC2642AIDD-16#PBF LTC2642AIDD-16#TRPBF LTC2642IDD-16#PBF LTC2642IDD-16#TRPBF LTC2642IDD-14#PBF LTC2642IDD-14#TRPBF LTC2642IDD-12#PBF LTC2642IDD-12#TRPBF LTC2642ACMS-16#PBF LTC2642ACMS-16#TRPBF LTC2642CMS-16#PBF LTC2642CMS-16#TRPBF LTC2642CMS-14#PBF LTC2642CMS-14#TRPBF LTC2642CMS-12#PBF LTC2642CMS-12#TRPBF LTC2642AIMS-16#PBF LTC2642AIMS-16#TRPBF LTC2642IMS-16#PBF LTC2642IMS-16#TRPBF LTC2642IMS-14#PBF LTC2642IMS-14#TRPBF LTC2642IMS-12#PBF LTC2642IMS-12#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. ...
Page 4
LTC2641/LTC2642 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise specified. SYMBOL PARAMETER CONDITIONS Static Peformance N Resolution Monotonicity DNL Differential Nonlinearity (Note 3) INL Integral Nonlinearity (Note 3) ZSE Zero Code Offset Error Code = 0 ZS ...
Page 5
ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise specified. SYMBOL PARAMETER I Digital Input Current IN C Digital Input Capacitance IN V Hysteresis Voltage H Power Supply V Supply Voltage DD I Supply Current ...
Page 6
LTC2641/LTC2642 TYPICAL PERFORMANCE CHARACTERISTICS Integral Nonlinearity (INL) 1.0 LTC2642-16 0 2.5V REF 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 16384 32768 65535 49152 CODE 26412 G01 Differential Nonlinearity (DNL) 1.0 LTC2642-16 ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS Bipolar Gain Error vs Temperature 2.5V REF –1 –2 –3 –4 –5 –40 – TEMPERATURE (°C) 26412 G10 14-Bit Integral Nonlinearity (INL) ...
Page 8
LTC2641/LTC2642 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current ( Temperature 150 V = 2.5V REF 125 100 –40 – TEMPERATURE (°C) 26412 G19 Supply ...
Page 9
PIN FUNCTIONS LTC2641 – MSOP, DFN Packages REF (Pin 1): Reference Voltage Input. Apply an external reference at REF between 2V and V CS (Pin 2): Serial Interface Chip Select/Load Input. When CS is low, SCLK is enabled for shifting ...
Page 10
LTC2641/LTC2642 BLOCK DIAGRAMS LTC2641 - MSOP , DFN 7 1 REF V DD LTC2641-16 LTC2641-14 LTC2641-12 POWER-ON 16-/14-/12-BIT DAC RESET CS 2 SCLK 3 CONTROL 16-BIT DATA LATCH DIN LOGIC 4 CLR 16-BIT SHIFT REGISTER 5 10 LTC2641-16 V OUT ...
Page 11
TIMING DIAGRAM SCK SDI CS/LD OPERATION General Description The LTC2641/LTC2642 family of 16-/14-/12-bit voltage output DACs offer full 16-bit performance with less than ±1LSB integral linearity error and less than ±1LSB differ- ential linearity error, guaranteeing ...
Page 12
LTC2641/LTC2642 OPERATION high-to-low transition, the data on DIN is loaded, MSB fi rst, into the shift register on each rising edge of the serial clock input (SCLK). After 16 data bits have been loaded into the serial input register, a ...
Page 13
APPLICATIONS INFORMATION Unipolar Confi guration Figure 2 shows a typical unipolar DAC application for the LTC2641. Tables 1a, 1b and 1c show the unipolar binary code tables for 16-bit, 14-bit and 12-bit operation. V REF 2.5V 0.1μF 5V/3V 0.1μF 1 ...
Page 14
LTC2641/LTC2642 APPLICATIONS INFORMATION Bipolar Confi guration Figure 3 shows a typical bipolar DAC application for the LTC2642. The on-chip bipolar offset/gain resistors, R and R , are connected to an external amplifi produce INV a bipolar output swing ...
Page 15
APPLICATIONS INFORMATION Unbuffered Operation and V Loading OUT The DAC output is available directly at the V swings from GND Unbuffered operation provides REF the lowest possible offset, full-scale and linearity errors, the fastest settling time and ...
Page 16
LTC2641/LTC2642 APPLICATIONS INFORMATION such as the LTC6078 is suitable, if the application does not require linear operation very near to GND, or zero scale (Figure 2). The LTC6078 typically swings to within 1mV of GND not required ...
Page 17
APPLICATIONS INFORMATION Op Amp Specifi cations and Bipolar DAC Accuracy The op amp contributions to unipolar DAC error discussed above apply equally to bipolar operation. The bipolar ap- plication circuit gains up the DAC span, and all errors ...
Page 18
LTC2641/LTC2642 APPLICATIONS INFORMATION as the external reference remains stable with the added capacative loading. Digital Inputs and Interface Logic All of the digital inputs include Schmitt-trigger buffers to accept slow transition interfaces. This means that op- tocuplers can interface directly ...
Page 19
APPLICATIONS INFORMATION on the digital inputs is imperceptible, thanks to the digital input hysteresis) Just by maintaining separate areas on the GND plane where analog and digital return currents naturally fl ow, good results are generally achieved. Only after this ...
Page 20
LTC2641/LTC2642 PACKAGE DESCRIPTION 3.50 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). ...
Page 21
PACKAGE DESCRIPTION .050 BSC .245 MIN .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) NOTE: 1. DIMENSIONS IN 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE ...
Page 22
LTC2641/LTC2642 PACKAGE DESCRIPTION 0.889 ± 0.127 (.035 ± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 0.65 0.42 ± 0.038 (.0165 ± .0015) (.0256) TYP BSC RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT ...
Page 23
... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 24
... LT6010 150μA 8nV/√Hz Rail-to-Rail Output Precision Op Amp LTC6078 Dual CMOS Rail-to-Rail Input/Output Amplifi er References LT1019 Precision Bandgap Reference SoftSpan is a trademark of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...