Maxim

MAX191 - 12-Bit Sampling ADC (24 pin Narrow DIP)

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Features 12-Bit Resolution, 1/2LSB Linearity +5V or ±5V Operation (MAX191) Built-In Track/Hold Internal Reference with Adjustment Capability Low Power: 3mA Operating Mode 20µA Power-Down Mode 100ksps Tested Sampling Rate (MAX191) Serial and 8-Bit Parallel µP Interface 24-Pin Narrow DIP and Wide SO Packages

Pin Description Pin Number Description 1 PD-Power-Down Input 2 Vss-Negative Supply , 0V to -5.25V 3 AIN+ -Sampled Analog Input 4 AIN- -Analog Input Return 5 VREF-Reference-Buffer Output 6 REFADJ-Reference Adjust 7 AGND-Analog Ground 8 BIP-Llow selects unipolar mode,high selects bipolar mode 9 BUSY-BUSY Output is low during a conversion 10 DO/D8-Three-State Data Outputs:LSB =DO 11 D1/D9-Three-State Data Outputs 12 DGND-Digital Ground 13 D2/D10-Three-State Data Outputs 14 D3/D11-Three-State Data Outputs:MSB =D11 15 D4-Three-State Data Output 16 D5/SSTRB-Three-State Data Output/Serial Strobe Output in serial mode 17 D6/SCLKout-Three-State Data Output/Serial Clock Output in serial mode 18 D7/DOUT-Three-State Data Output/Data Output in serial mode 19 RD-Read Input.In parallel mode 20 CS-Chip-Select 21 HBEN-High-Byte Enable Input 22 PAR-Sets the output mode 23 CLK/SCLK-Clock Input/Serial Clock Input in serial mode 24 VDD-Positive Supply , +5V ±5%

Pin Layout Dimensional Drawing

Technical Data Data Sheet Maxim - Data Sheet for MAX191 Application Notes