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ICL7121KCJI Datasheet(PDF) 1 Page - Intersil Corporation |
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ICL7121KCJI Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 10 page 1 ® October 1997 ICL7121 16-Bit Multiplying Microprocessor-Compatible D/A Converter Features • 16-Bit Resolution • Low Integral Linearity Error -0.003% FSR • Monotonic to 16 Bits Over Full Military Temperature Range (LM Grade) • Microprocessor Compatible with Buffered Inputs • Bipolar Application Requires No External Resistors • Output Current Settling Time 3 µs Max (1µs Typ) • Low Linerarity and Gain Temperature Coefficients • Low Power Dissipation (25mW) • Full Four-Quadrant Multiplication • Low Differential Nonlinearity Error at Bipolor Zero Description The ICL7121 achieves 0.003% linearity without laser trimming by combining a four quadrant multiplying DAC using thin film resistors with an on-chip PROM-controlled correction circuit. Silicon-gate CMOS circuitry keeps the power dissipation very low. Microprocessor bus interfacing is eased using standard memory WRITE cycle timing and control. The input buffer register is loaded with the 16-bit input and directly controls the output switches. The register is transparent if WR and CS are held low. The ICL7121 is designed and programmed for bipolar operation. There is an offset resistor to the output which should be connected to -VREF and an inverter on the MSB line, giving the DAC a 2’s complement bipolar transfer function. Two extra resistors are included on the chip to facilitate the reference inversion, so that only an external op- amp is needed. Pinout ICL7121 (OUTLINE DWG JI) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE ICL7121JCJI 0 to 70 28 Ld CERDIP ICL7121JMJI -55 to 125 28 Ld CERDIP ICL7121KCJI 0 to 70 28 Ld CERDIP ICL7121KMJI -55 to 125 28 Ld CERDIP ICL7121LCJI 0 to 70 28 Ld CERDIP ICL7121LMJI -55 to 125 28 Ld CERDIP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 (LSB) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CS V+ IOUT AGNDS AGNDF RFB RINV VREF PROG D15 (MSB) D14 WR DGND ROFS D12 D13 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved File Number 3112.1 NOT REC OMM END ED F OR N EW D ESIG NS |
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