LTC1821 16-Bit, Ultra Precise, Fast Settling V DAC OUT FEATURES DESCRIPTIO n 2m s Settling to 0.0015% for 10V Step The LTC 1821 is a parallel input 16-bit multiplying voltage n 1LSB Max DNL and INL Over Industrial output DAC that operates from analog supply voltages of Temperature Range 5V up to 15V. INL and DNL are accurate to 1LSB over the n On-Chip 4-Quadrant Resistors Allow Precise 0V to industrial temperature range in both unipolar 0V to 10V and 10V, 0V to 10V or 10V Outputs bipolar 10V modes. Precise 16-bit bipolar 10V outputs are n Low Glitch Impulse: 2nVs achieved with on-chip 4-quadrant multiplication resistors. n Low Noise: 13nV/ Hz The LTC1821 is available in a 36-lead SSOP package and is n 36-Lead SSOP Package specified over the industrial temperature range. n Power-On Reset The device includes an internal deglitcher circuit that reduces n Asynchronous Clear Pin the glitch impulse to less than 2nVs (typ). The LTC1821 LTC1821: Reset to Zero Scale settles to 1LBS in 2m s with a full-scale 10V step. The LTC1821-1: Reset to Midscale combination of fast, precise settling and ultra low glitch make the LTC1821 ideal for precision industrial control applica- U tions. APPLICATIO S The asynchronous CLR pin resets the LTC1821 to zero scale n Process Control and Industrial Automation and resets the LTC1821-1 to midscale. n Precision Instrumentation n Direct Digital Waveform Generation n Software-Controlled Gain Adjustment , LTC and LT are registered trademarks of Linear Technology Corporation. n Automatic Test Equipment TYPICAL APPLICATIO 16-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components V REF LTC1821/LTC1821-1 V REF Integral Nonlinearity 5V 3 + 0.1F 6 1.0 LT 1468 V = 10V REF 2 0.8 V = 10V BIPOLAR OUT 15pF 15pF 0.6 0.4 12 14 10 9 8 2 11 0.2 R1 R REF V R R I COM CC OFS FB OUT + 15 V 0 15V R R OFS R1 R2 FB 0.2 0.1F V REF 0.4 16 13 LTC1821-1 V = DATA 16-BIT DAC OUT 0.6 V INPUTS + OUT V REF 0.8 3 TO 6, 15V 1.0 V 20 25 TO 36 0 16384 32768 49152 65535 0.1F DIGITAL INPUT CODE WR LD CLR DNC* DNC* DNC* NC DGND AGNDF AGNDS 1821 TA02 7 24 23 18 19 21 22 1 17 16 WR 1821 TA01 LD CLR *DO NOT CONNECT 1 INTEGRAL NONLINEARITY (LSB) U ULTC1821 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1) TOP VIEW ORDER PART V to AGNDF, AGNDS ............................... 0.3V to 7V CC DGND 1 36 D4 NUMBER V to DGND .............................................. 0.3V to 7V CC V 2 35 D5 CC + D3 3 34 D6 Total Supply Voltage (V to V ) ............................... 36V D2 4 33 D7 LTC1821ACGW AGNDF, AGNDS to DGND ............................. V + 0.3V CC D1 5 32 D8 LTC1821BCGW DGND to AGNDF, AGNDS ............................. V + 0.3V D0 6 31 D9 CC CLR 7 30 D10 LTC1821-1ACGW REF, R to AGNDF, AGNDS, DGND .................. 15V COM REF 8 29 D11 LTC1821-1BCGW R , R , R1, to AGNDF, AGNDS, DGND ............ 15V OFS FB R 9 28 D12 COM R1 10 27 D13 LTC1821AIGW Digital Inputs to DGND ............... 0.3V to (V + 0.3V) CC R 11 26 D14 OFS LTC1821BIGW I to AGNDF, AGNDS............... 0.3V to (V + 0.3V) OUT CC R 12 25 D15 FB LTC1821-1AIGW Maximum Junction Temperature .......................... 150 C VOUT 13 24 WR I 14 23 LD OUT LTC1821-1BIGW Operating Temperature Range + V 15 22 NC LTC1821C/LTC1821-1C.......................... 0 C to 70 C AGNDS 16 21 DNC* AGNDF 17 20 V LTC1821I/LTC1821-1I ....................... 40 C to 85 C DNC* 18 19 DNC* Storage Temperature Range ................ 65 C to 150 C GW PACKAGE Lead Temperature (Soldering, 10 sec)................. 300 C 36-LEAD PLASTIC SSOP WIDE T = 125 C, q = 80 C/ W JMAX JA *DO NOT CONNECT Consult factory for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are T = T to T , A MIN MAX + V = 15V, V = 15V, V = 5V, V = 10V, AGNDF = AGNDS = DGND = 0V. CC REF LTC1821B/-1B LTC1821A/-1A SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Accuracy Resolution l 16 16 Bits Monotonicity l 16 16 Bits INL Integral Nonlinearity T = 25 C (Note 2) 2 0.25 1LSB A T to T l 2 0.35 1LSB MIN MAX DNL Differential Nonlinearity T = 25 C 1 0.2 1LSB A T to T l 1 0.2 1LSB MIN MAX GE Gain Error Unipolar Mode T = 25 C (Note 3) 16 5 16 LSB A T to T l 24 8 16 LSB MIN MAX Bipolar Mode T = 25 C (Note 3) 16 2 16 LSB A T to T l 24 5 16 LSB MIN MAX Gain Temperature Coefficient D Gain/D Temperature (Note 4) l 1 3 1 3 ppm/ C Unipolar Zero-Scale Error T = 25 C 3 0.25 2LSB A T to T l 6 0.50 4LSB MIN MAX Bipolar Zero Error T = 25 C 12 2 8LSB A T to T l 16 3 10 LSB MIN MAX PSRR Power Supply Rejection Ratio V = 5V 10% l 2 0.7 2 LSB/V CC + V , V = 4.5V to 16.5V l 2 0.1 2 LSB/V 2 U W U U WWW