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ML2288BIP Datasheet(PDF) 1 Page - Micro Linear Corporation |
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ML2288BIP Datasheet(HTML) 1 Page - Micro Linear Corporation |
1 / 26 page BLOCK DIAGRAM 1 May 1997 ML2281, ML2282*, ML2284#, ML2288# Serial I/O 8-Bit A/D Converters with Multiplexer Options GENERAL DESCRIPTION The ML2281 family are 8-bit successive approximation A/D converters with serial I/O and configurable input multiplexers with up to 8 input channels. All errors of the sample-and-hold, incorporated on the ML2281 family are accounted for in the analog-to-digital converters accuracy specification. The voltage reference can be externally set to any value between GND and VCC, thus allowing a full conversion over a relatively small voltage span if desired. The ML2281 family is an enhanced double polysilicon CMOS pin compatible second source for the ADC0831, ADC0832, ADC0834, and ADC0838 A/D converters. The ML2281 series enhancements are faster conversion time, true sample-and-hold function, superior power supply rejection, improved AC common mode rejection, faster digital timing, and lower power dissipation. All parameters are guaranteed over temperature with a power supply voltage of 5V ±10%. FEATURES s Conversion time: 6µs s Total unadjusted error: ±1/2LSB or ±1LSB s Sample-and-hold: 375ns acquisition s 2, 4 or 8-input multiplexer options s 0 to 5V analog input range with single 5V power supply s Operates ratiometrically or with up to 5V voltage reference s No zero or full-scale adjust required s ML2281 capable of digitizing a 5V, 40kHz sine wave s Low power: 12.5mW MAX s Superior pin compatible replacement for ADC0831, ADC0832, ADC0834, and ADC0838 s Analog input protection: 25mA (min) per input s Now in 8-Pin SOIC Package (ML2281, ML2282) INPUT SHIFT-REGISTER OUTPUT SHIFT-REGISTER SHUNT REGULATOR CONTROL AND TIMING DI SARS CLK CS DO 4-BIT SE DGND V+ VCC VREF AGND COMMON CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0 A/D CONVERTER WITH SAMPLE & HOLD FUNCTION Σ VREF CLK CS VIN– SUCCESSIVE APPROXIMATION REGISTER D/A CONVERTER + – OUTPUT SHIFT-REGISTER CONTROL AND TIMING COMP A/D WITH SAMPLE & HOLD FUNCTION 8pF 8pF – + VIN+ VCC GND DO ML2281 ML2288 (8-Channel SE or 4-Channel Diff Multiplexer) ML2284 (4-Channel SE or 2-Channel Diff Multiplexer) ML2284 (2-Channel SE or 1-Channel Diff Multiplexer) (* Indicates Part is Obsolete) (# Indicates Part is End Of Life as Of July 1, 2000) |
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