MAX1090/MAX1092 19-1640 Rev 2 12/02 400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface General Description Features The MAX1090/MAX1092 low-power, 10-bit analog-to- 10-Bit Resolution, 0.5 LSB Linearity digital converters (ADCs) feature a successive-approxi- +5V Single-Supply Operation mation ADC, automatic power-down, fast wake-up (2s), an on-chip clock, +2.5V internal reference, and a User-Adjustable Logic Level (+2.7V to +5.5V) high-speed, byte-wide parallel interface. The devices Internal +2.5V Reference operate with a single +5V analog supply and feature a V pin that allows them to interface directly with a LOGIC Software-Configurable Analog Input Multiplexer +2.7V to +5.5V digital supply. 8-Channel Single-Ended/ Power consumption is only 10mW (V = V ) at a DD LOGIC 4-Channel Pseudo-Differential (MAX1090) 400ksps max sampling rate. Two software-selectable 4-Channel Single-Ended/ power-down modes enable the MAX1090/MAX1092 to 2-Channel Pseudo-Differential (MAX1092) be shut down between conversions accessing the par- allel interface returns them to normal operation. Software-Configurable Unipolar/Bipolar Analog Powering down between conversions can cut supply Inputs current to under 10A at reduced sampling rates. Low Current: 2.5mA (400ksps) Both devices offer software-configurable analog inputs 1.0mA (100ksps) for unipolar/bipolar and single-ended/pseudo-differen- 400A (10ksps) tial operation. In single-ended mode, the MAX1090 has 2A (Shutdown) eight input channels and the MAX1092 has four input Internal 6MHz Full-Power Bandwidth Track/Hold channels (four and two input channels, respectively, when in pseudo-differential mode). Byte-Wide Parallel (8 + 2) Interface Excellent dynamic performance and low power, com- Small Footprint: 28-Pin QSOP (MAX1090) bined with ease of use and small package size, make 24-Pin QSOP (MAX1092) these converters ideal for battery-powered and data- acquisition applications or for other circuits with demand- ing power consumption and space requirements. Pin Configurations The MAX1090/MAX1092 tri-states INT when CS goes high. Refer to the MAX1060/MAX1064 if tri-stating INT is TOP VIEW not desired. HBEN 1 24 V LOGIC The MAX1090 is available in a 28-pin QSOP package, while the MAX1092 comes in a 24-pin QSOP. For pin- D7 2 23 V DD compatible +3V, 10-bit versions, refer to the MAX1091/ D6 3 22 REF MAX1093 data sheet. D5 4 21 REFADJ Applications D4 5 20 GND MAX1092 Industrial Control Systems Data Logging D3 6 19 COM Energy Management Patient Monitoring D2 7 18 CH0 Data-Acquisition Systems Touchscreens D1/D9 8 17 CH1 D0/D8 9 16 CH2 Ordering Information INT 10 15 CH3 INL RD 11 14 CS PART TEMP RANGE PIN-PACKAGE (LSB) WR 12 13 CLK MAX1090ACEI 0C to +70C 28 QSOP 0.5 QSOP MAX1090BCEI 0C to +70C 28 QSOP 1 MAX1090AEEI -40C to +85C 28 QSOP 0.5 Pin Configurations continued at end of data sheet. MAX1090BEEI -40C to +85C 28 QSOP 1 Typical Operating Circuits appear at end of data sheet. Ordering Information continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A V to GND.........................................................-0.3V to +6V 24-Pin QSOP (derate 9.5mW/C above +70C).........762mW LOGIC CH0CH7, COM to GND............................-0.3V to (V + 0.3V) 28-Pin QSOP (derate 8.00mW/C above +70C).......667mW DD REF, REFADJ to GND.................................-0.3V to (V + 0.3V) Operating Temperature Ranges DD Digital Inputs to GND ...............................................-0.3V to +6V MAX1090 C /MAX1092 C ....................... 0C to +70C Digital Outputs (D0D9, INT) MAX1090 E /MAX1092 E .....................-40C to +85C to GND ........................................... -0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C LOGIC Lead Temperature (soldering, 10s) .................................+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 = V = +5V 10%, COM = GND, REFADJ = V , V = +2.5V, 4.7F capacitor at REF pin, f = 7.6MHz (50% duty DD LOGIC DD REF CLK cycle), T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution RES 10 Bits MAX109 A 0.5 Relative Accuracy (Note 2) INL LSB MAX109 B 1 Differential Nonlinearity DNL No missing codes over temperature 1 LSB Offset Error 2 LSB Gain Error (Note 3) 2 LSB Gain Temperature Coefficient 2.0 ppm/C Channel-to-Channel Offset 0.1 LSB Matching DYNAMIC SPECIFICATIONS (f = 50kHz, V = 2.5V , 400ksps, external f = 7.6MHz, bipolar input mode) IN(sine wave) IN P-P CLK Signal-to-Noise Plus Distortion SINAD 60 dB Total Harmonic Distortion THD -72 dB (including 5th-order harmonic) Spurious-Free Dynamic Range SFDR 72 dB Intermodulation Distortion IMD f = 49kHz, f = 52kHz 76 dB IN1 IN2 Channel-to-Channel Crosstalk f = 175kHz, V = 2.5V (Note 4) -78 dB IN IN P-P Full-Linear Bandwidth SINAD > 56dB 350 kHz Full-Power Bandwidth -3dB rolloff 6 MHz CONVERSION RATE External clock mode 2.1 2.5 3.0 3.5 Conversion Time (Note 5) t External acquisition/internal clock mode s CONV Internal acquisition/internal clock mode 3.2 3.6 4 T/H Acquisition Time t 400 ns ACQ Aperture Delay External acquisition or external clock mode 25 ns External acquisition or external clock mode <50 Aperture Jitter ps Internal acquisition/internal clock mode <200 External Clock Frequency f 0.1 7.6 MHz CLK Duty Cycle 30 70 % 2 MAX1090/MAX1092