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MP7636A Dataheets PDF



Part Number MP7636A
Manufacturers Exar Corporation
Logo Exar Corporation
Description 15 V CMOS Microprocessor Compatible Double-Buffered Multiplying 16-Bit Digital-to-Analog Converter
Datasheet MP7636A DatasheetMP7636A Datasheet (PDF)

FEATURES • • • • • • • • • w w Four Quadrant Multiplication 16-Bit Monotonicity Lower Data Bus Feedthrough @ CS = 1 Low Feedthrough Error Low Power Consumption TTL/5 V CMOS Compatible Double Buffered Decoded DAC Approach Latch-Up Free a D . w S a t e e h U 4 t m o .c MP7636A 15 V CMOS Microprocessor Compatible Double-Buffered, Multiplying 16-Bit Digital-to-Analog Converter BENEFITS • High Accuracy Performance at Low Cost • Easy Interface with 8-Bit Microprocessors • Simple Upgrade of MP.

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FEATURES • • • • • • • • • w w Four Quadrant Multiplication 16-Bit Monotonicity Lower Data Bus Feedthrough @ CS = 1 Low Feedthrough Error Low Power Consumption TTL/5 V CMOS Compatible Double Buffered Decoded DAC Approach Latch-Up Free a D . w S a t e e h U 4 t m o .c MP7636A 15 V CMOS Microprocessor Compatible Double-Buffered, Multiplying 16-Bit Digital-to-Analog Converter BENEFITS • High Accuracy Performance at Low Cost • Easy Interface with 8-Bit Microprocessors • Simple Upgrade of MP1230A Family to High Accuracy (Pin Compatible) • Reduced Board Space • 16-Bit Bus Version: MP7626 GENERAL DESCRIPTION The MP7636A is manufactured using advanced thin film resistors on a double metal CMOS process. The MP7636A incorporates a unique bit decoding technique yielding lower glitch, higher speed and excellent accuracy over temperature and time. 16-bit differential non-linearity is achieved with minimal laser trim. The MP7636A is packaged in a 20-pin 300 mil wide DIP and is a direct 16-bit replacement for the 12-bit DAC1230 series. Full pin-for-pin compatibility allows existing systems to be upgraded to 16 bits without hardware modification. The MP7636A provides 16-bit data loading through 8 input data lines for direct interface to 8-bit data buses. All data loading and data transfer operations are identical to the WRITE cycle of a static RAM. The MP7636A uses a unique circuit which significantly reduces transients in the supplies during DATA bus transitions at CS = 1. SIMPLIFIED BLOCK DIAGRAM DB15 (MSB) (DB7) DB14 (DB6) DB13 (DB5) DB12 (DB4) DB11 (DB3) DB10 (DB2) DB9 (DB1) DB8 (DB0, LSB) When LE = 1 latch outputs follow inputs When LE = 0 Latch outputs are latched w w .D w t a S a 8-Bit Input Latch LE e h t e U 4 .c m o 16-Bit Register 16-Bit MDAC RFB IOUT1 IOUT2 8-Bit Input Latch BYTE1/BYTE2 CS WR1 XFER WR2 LE VDD VREF DGND Rev. 2.00 1 w w w .D a S a t e e h U 4 t m o .c AGND MP7636A ORDERING INFORMATION Package Type SOIC SOIC Temperature Range –40 to +85°C –40 to +85°C Part No. MP7636AJS MP7636AKS INL (LSB) +4 +2 DNL (LSB) +4 +2 Gain Error (% FSR) 0.1 0.1 *Contact factory for non-compliant military processing PIN CONFIGURATION See Packaging Section for Package Dimensions CS WR1 AGND DB11 (DB3) DB10 (DB2) DB9 (DB1) DB8 (DB0, LSB) VREF RFB DGND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD BYTE1/BYTE2 WR2 XFER DB12 (DB4) DB13 (DB5) DB14 (DB6) DB15 (MSB) (DB7) IOUT2 IOUT1 20 Pin SOIC (Jedec, 0. 300”) S20 PIN OUT DEFINITIONS PIN NO. 1 2 3 4 5 6 7 8 9 10 11 NAME CS WR1 AGND DB11 (DB3) DB10 (DB2) DB9 (DB1) DB8 (DB0) VREF RFB DGND IOUT1 DESCRIPTION Chip Select (Active Low) Write1 (Active Low) Analog Ground Data Input Bit 11 (MSB) Data Input Bit 3 Data Input Bit 10 Data Input Bit 2 Data Input Bit 9 Data Input Bit 1 Data Input Bit 8 Data Input Bit 0 (LSB) Reference Input Voltage Internal Feedback Resistor Digital Ground Current Output 1 20 14 15 16 17 18 19 PIN NO. 12 13 NAME IOUT2 DB15 (MSB) (DB7.


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