LTC1655/LTC1655L 16-Bit Rail-to-Rail Micropower DACs in SO-8 Package FEATURES DESCRIPTIO n 16-Bit Monotonicity Over Temperature The LTC 1655/LTC1655L are rail-to-rail voltage output, n Deglitched Rail-to-Rail Voltage Output 16-bit digital-to-analog converters in an SO-8 package. n SO-8 Package They include an output buffer and a reference. The 3-wire n I : 600m A serial interface is compatible with SPI/QSPI and CC(TYP) TM n Internal Reference: 2.048V (LTC1655) MICROWIRE protocols. The CLK input has a Schmitt 1.25V (LTC1655L) trigger that allows direct optocoupler interface. n Maximum DNL Error: 1LSB The LTC1655 has an onboard 2.048V reference that can be n Settling Time: 20m S to 1LSB overdriven to a higher voltage. The output swings from 0V n 750kHz Max Update Rate to 4.096V when using the internal reference. The typical n Power-On Reset to Zero Volts power dissipation is 3.0mW on a single 5V supply. n 3-Wire Cascadable Serial Interface The LTC1655L has an onboard 1.25V reference that can be n Low Cost n overdriven to a higher voltage. The output swings from 0V Pin Compatible Upgrade for LTC1451 12-Bit DAC to 2.5V when using the internal reference. The typical Family power dissipation is 1.8mW on a single 3V supply. U The LTC1655/LTC1655L are pin compatible with Linear APPLICATIO S Technologys 12-bit V DAC family, allowing an easy OUT n Digital Calibration upgrade path. They are the only buffered 16-bit DACs in n Industrial Process Control an SO-8 package and they include an onboard reference n Automatic Test Equipment for standalone performance. n Cellular Telephones , LTC and LT are registered trademarks of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor Corporation. W FU CTIO AL BLOCK DIAGRA Functional Block Diagram: 16-Bit Rail-to-Rail DAC Differential Nonlinearity vs Input Code LTC1655: 4.5V TO 5.5V LTC1655: 2.048V LTC1655L: 2.7V TO 5.5V LTC1655L: 1.25V 1.0 86 0.8 V REF CC 0.6 REF 2 D IN 0.4 1 CLK 16-BIT 0.2 16 m P SHIFT 16-BIT 0 + REG 3 CS/LD V OUT DAC 7 AND 0.2 DAC LATCH 0.4 4 D 0.6 OUT 0.8 POWER-ON 1.0 TO RESET 0 16384 32768 49152 65535 OTHER GND DACS CODE 1655/55L TA01 5 1655/55L TA02 1 DNL ERROR (LSB) UU ULTC1655/LTC1655L ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER I FOR ATIO (Note 1) V to GND .............................................. 0.5V to 7.5V ORDER PART CC NUMBER TTL Input Voltage .................................... 0.5V to 7.5V TOP VIEW V , REF ....................................... 0.5V to V + 0.5V OUT CC LTC1655CN8 Maximum Junction Temperature ......................... 125 C CLK 1 8 V CC LTC1655IN8 Operating Temperature Range D V 2 7 IN OUT LTC1655CS8 LTC1655C/LTC1655LC ........................... 0 C to 70 C CS/LD 3 6 REF LTC1655IS8 LTC1655I/LTC1655LI ........................ 40 C to 85 C D 4 5 GND LTC1655LCN8 OUT Storage Temperature Range ................ 65 C to 150 C LTC1655LIN8 N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO LTC1655LCS8 Lead Temperature (Soldering, 10 sec)................. 300 C LTC1655LIS8 T = 125 C, q = 100 C/W (N8) JMAX JA T = 125 C, q = 150 C/W (S8) JMAX JA S8 PART MARKING 1655 1655I 1655L 1655LI Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. A V = 4.5V to 5.5V (LTC1655), V = 2.7V to 5.5V (LTC1655L) V unloaded, REF unloaded, unless otherwise noted. CC CC OUT SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS DAC Resolution l 16 Bits Monotonicity l 16 Bits DNL Differential Nonlinearity Guaranteed Monotonic (Note 2) LTC1655, REF = 2.2V, V = 5V (Note 8) (External) l 0.3 1.0 LSB CC LTC1655L, REF = 2.2V, V = 5V (Note 8) (External) l 0.5 1.0 LSB CC INL Integral Nonlinearity LTC1655, REF = 2.2V, V = 5V (Note 8) (External) l 8 20 LSB CC LTC1655L, REF = 2.2V, V = 5V (Note 8) (External) l 8 20 LSB CC ZSE Zero Scale Error LTC1655 l 0 3.0 mV LTC1655L l 0 3.5 mV V Offset Error Measured at Code 200 OS LTC1655, REF = 2.2V, V = 5V (Note 8) (External) l 0.5 3.0 mV CC LTC1655L, REF = 1.3V, V = 2.7V (Note 8) (External) l 0.5 3.5 mV CC V TC Offset Error Tempco 5 m V/ C OS Gain Error REF = 2.2V (External), V = 5V (Note 8) l 5 16 LSB CC Gain Error Drift 0.5 ppm/ C Power Supply V Positive Supply Voltage For Specified Performance CC LTC1655 l 4.5 5.5 V LTC1655L l 2.7 5.5 V I Supply Current (Note 3) l 600 1200 m A CC 2 U WU U WWW