MAX154/MAX158 19-0892 Rev 3 12/96 CMOS High-Speed 8-Bit ADCs with Multiplexer and Reference General Description Features One-Chip Data Acquisition System The MAX154/MAX158 are high-speed multi-channel analog-to-digital converters (ADCs). The MAX154 has Four or Eight Analog Input Channels four analog input channels while the MAX158 has eight 2.5s per Channel Conversion Time channels. Conversion time for both devices is 2.5s. The MAX154/MAX158 also feature a 2.5V on-chip refer- Internal 2.5V Reference ence, forming a complete high-speed data acquisition Built-In Track/Hold Function system. 1 / LSB Error Specification 2 Both converters include a built-in track/hold, eliminating Single +5V Supply Operation the need for an external track/hold. The analog input range is 0V to +5V, although the ADC operates from a No External Clock single +5V supply. New Space-Saving SSOP Package Microprocessor interfaces are simplified by the ADCs Ordering Information ability to appear as a memory location or I/O port without the need for external logic. The data outputs use latched, ERROR PART TEMP. RANGE PIN-PACKAGE three-state buffer circuitry to allow direct connection to a (LSB) microprocessor data bus or system input port. 24 Narrow 1 MAX154ACNG 0C to +70C / 2 Plastic DIP Applications 24 Narrow MAX154BCNG 0C to +70C 1 Plastic DIP Digital Signal Processing 1 MAX154BC/D 0C to +70C Dice / 2 High-Speed Data Acquisition 1 MAX154ACWG 0C to +70C 24 Wide SO / 2 Telecommunications MAX154BCWG 0C to +70C 24 Wide SO 1 1 MAX154ACAG 0C to +70C 24 SSOP / High-Speed Servo Control 2 MAX154BCAG 0C to +70C 24 SSOP 1 Audio Instrumentation Ordering Information continued at end of data sheet. Pin Configurations TOP VIEW AIN6 1 AIN7 28 AIN5 2 AIN8 27 AIN4 V 1 24 DD AIN4 3 V 26 DD AIN3 2 N.C. 23 AIN3 4 25 A0 AIN2 3 A0 22 MAX158 AIN2 5 24 A1 AIN1 4 21 A1 AIN1 6 23 A2 REF OUT MAX154 5 20 DB7 REF OUT DB7 7 22 DB0 6 19 DB6 DB0 21 DB6 8 DB1 DB5 7 18 DB1 DB5 9 20 DB2 DB4 8 17 DB2 DB4 10 19 DB3 CS 9 16 DB3 18 CS 11 RD RDY 10 15 RD 17 RDY 12 INT V + 11 14 REF INT V + 13 16 REF GND 13 V - 12 REF GND 15 V - 14 REF DIP/SO/SSOP DIP/SO/SSOP Maxim Integrated Products 1 For free samples & the latest literature: CMOS High-Speed 8-Bit ADCs with Multiplexer and Reference ABSOLUTE MAXIMUM RATINGS Supply Voltage, V to GND.........................................0V, +10V Operating Temperature Ranges DD Voltage at Any Other Pins........................GND -0.3V, V +0.3V MAX15 C .....................................................0C to +70C DD Output Current (REF OUT)..................................................30mA MAX15 E ..................................................-40C to +85C Power Dissipation (any package) to +75C ....................450mW MAX15 M ...............................................-55C to +125C Derate above +25C by ..............................................6mW/C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +5V, V = +5V, V = GND, Mode 0, T = T to T , unless otherwise noted). DD REF+ REF- A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY Resolution 8 Bits MAX15 A 1/2 Total Unadjusted Error (Note 1) LSB MAX15 B 1 No-Missing-Codes Resolution 8 Bits Channel-to-Channel Mismatch 1/4 LSB REFERENCE INPUT Reference Resistance 14k V + Input Voltage Range V-V V REF REF DD V - Input Voltage Range GND V + V REF REF REFERENCE OUTPUT (Note 2) Output Voltage REF OUT T = +25C 2.47 2.50 2.53 V A Load Regulation I = 0mA to 10mA, T = +25C -6 -10 mV L A Power-Supply Sensitivity V 5%, T = +25C 1 3 mV DD A MAX15 C 40 70 Temperature Drift (Note 3) MAX15 E 40 70 ppm/C MAX15 M 60 100 Output Noise e 200 V/rms N Capacitive Load 0.01 F ANALOG INPUT Analog Input Voltage Range A V-V + V INR REF REF Analog Input Capacitance C 45 pF AIN Analog Input Current I Any channel, AIN = 0V to 5V 3 A AIN Slew Rate, Tracking SR 0.7 0.157 V/s LOGIC INPUTS (RD, CS, A0, A1, A2) Input High Voltage V 2.4 V INH Input Low Voltage V 0.8 V INL Input High Current I 1 A INH Input Low Current I -1 A INL Input Capacitance (Note 4) C 58 pF IN 2 MAX154/MAX158