MX7575/MX7576 19-0876 Rev 1 5/96 CMOS, P-Compatible, 5s/10s, 8-Bit ADCs General Description Features Maxims MX7575/MX7576 are high-speed (5s/10s), Fast Conversion Time: 5s (MX7575) microprocessor (P) compatible, 8-bit analog-to-digital 10s (MX7576) converters (ADCs). The MX7575 provides an on-chip Built-In Track/Hold Function (MX7575) track/hold function that allows full-scale signals up to 50kHz (386mV/s slew rate) to be acquired and digi- Low Total Unadjusted Error (1LSB max) tized accurately. Both ADCs use a successive-approxi- 50kHz Full-Power Signal Bandwidth (MX7575) mation technique to achieve their fast conversions and low power dissipation. The MX7575/MX7576 operate Single +5V Supply Operation with a +5V supply and a 1.23V external reference. They 8-Bit P Interface accept input voltages ranging from 0V to 2V . REF 100ns Data-Access Time The MX7575/MX7576 are easily interfaced to all popu- Low Power: 15mW lar 8-bit Ps through standard CS and RD control sig- nals. These signals control conversion start and data Small-Footprint Packages access. A BUSY signal indicates the beginning and end of a conversion. Since all the data outputs are Ordering Information latched and three-state buffered, the MX7575/MX7576 can be directly tied to a P data bus or system l/O port. INL PART TEMP. RANGE PIN-PACKAGE (LSB) Maxim also makes the MAX165, a plug-in replacement MX7575JN 1 0C to +70C 18 Plastic DIP for the MX7575 with an internal 1.23V reference. For applications that require a differential analog input and MX7575KN 0C to +70C 18 Plastic DIP 1/2 an internal reference, the MAX166 is recommended. MX7575JCWN 0C to +70C 18 Wide SO 1 MX7575KCWN 0C to +70C 18 Wide SO 1/2 Applications MX7575JP 0C to +70C 20 PLCC 1 Digital Signal Processing MX7575KP 0C to +70C 20 PLCC 1/2 High-Speed Data Acquisition MX7575J/D 0C to +70C Dice* 1 Telecommunications MX7575AQ -25C to +85C 18 CERDIP** 1 MX7575BQ -25C to +85C 18 CERDIP** 1/2 Audio Systems Ordering Information continued at end of data sheet. High-Speed Servo Loops * Contact factory for dice specifications. Low-Power Data Loggers ** Contact factory for availability. Pin Configurations Functional Diagrams V DD TOP VIEW 18 CS 1 18 V DD MX7575 16 TRACK/ RD 2 17 REF AIN HOLD COMP MX7575 TP (MODE) 3 16 AIN 15 MX7576 AGND 4 15 BUSY AGND 17 REF DAC CLK 5 14 D0 (LSB) CLOCK 5 CLK D7 (MSB) 6 13 D1 OSCILLATOR SAR D6 7 12 D2 6 1 CS D7 LATCH AND 8 11 D5 D3 . 2 CONTROL . RD THREE-STATE LOGIC 3 D0 OUTPUT DRIVERS 10 TP DGND 9 D4 14 49 DIP/SO ( ) ARE FOR MX7576 ONLY. BUSY DGND Pin Configurations continued at end of data sheet. Functional Diagrams continued at end of data sheet. Maxim Integrated Products 1 For free samples & the latest literature: CMOS, P-Compatible, 5s/10s, 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to AGND...............................................................-0.3V, +7V Continuous Power Dissipation (T = +70C) DD A V to DGND ..............................................................-0.3V, +7V Plastic DIP (derate 11.11mW/C above +70C) ...............889mW DD AGND to DGND...............................................-0.3V, V + 0.3V Wide SO (derate 9.52mW/C above +70C)..................762mW DD Digital Input Voltage to DGND CERDIP (derate 10.53mW/C above +70C).................842mW (CS, RD, TP, MODE)......................................-0.3V, V + 0.3V PLCC (derate 10.00mW/C above +70C) ....................800mW DD Digital Output Voltage to DGND Operating Temperature Ranges (BUSY, D0D7) ..............................................-0.3V, V + 0.3V MX757 J/K............................................................0C to +70C DD CLK Input Voltage to DGND............................-0.3V, V + 0.3V MX757 A/B ........................................................-25C to +85C DD REF to AGND...................................................-0.3V, V + 0.3V MX757 JE/KE ....................................................-40C to +85C DD AIN to AGND....................................................-0.3V, V + 0.3V MX757 S/T.......................................................-55C to +125C DD 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 = 1.23V AGND = DGND = 0V f = 4MHz external for MX7575 f = 2MHz external for MX7576 DD REF CLK CLK T = T to T , unless otherwise noted.) A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY Resolution 8 Bits MX757 K/B/T 1 Total Unadjusted Error TUE LSB MX757 J/A/S 2 MX757 K/B/T 1/2 Relative Accuracy INL LSB MX757 J/A/S 1 No-Missing-Codes Resolution 8 Bits Full-Scale Error 1 LSB Full-Scale Tempco 5 ppm/C Offset Error (Note 1) 1/2 LSB Offset Tempco 5 ppm/C ANALOG INPUT Voltage Range 1LSB = 2V /256 02V V REF REF DC Input Impedance 10 M Slew Rate, Tracking MX7575 0.386 V/s Signal-to-Noise Ratio (Note 2) SNR MX7575, V = 2.46V at 10kHz, Figure 13 45 dB IN p-p REFERENCE INPUT Reference Voltage V 5% variation for specified performance 1.23 V REF Reference Current I 500 A REF LOGIC INPUTS , , MODE Input Low Voltage V 0.8 V INL Input High Voltage V 2.4 V INH T = +25C 1 A Input Current I V = 0V or V A IN IN DD T = T to T 10 A MIN MAX Input Capacitance (Note 2) C 10 pF IN 2 MX7575/MX7576 RD CS