MAX1091/MAX1093 19-1638 Rev 2 12/02 250ksps, +3V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface General Description Features The MAX1091/MAX1093 low-power, 10-bit analog-to- 10-Bit Resolution, 0.5 LSB Linearity digital converters (ADCs) feature a successive-approxi- +3V 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 (+1.8V to +3.6V) high-speed, byte-wide parallel interface. They operate Internal +2.5V Reference with a single +3V analog supply and feature a V LOGIC pin that allows them to interface directly with a +1.8V to Software-Configurable, Analog Input Multiplexer +3.6V digital supply. 8-Channel Single-Ended/ Power consumption is only 5.7mW (V = V ) at the DD LOGIC 4-Channel Pseudo-Differential (MAX1091) maximum sampling rate of 250ksps. Two software-selec- 4-Channel Single-Ended/ table power-down modes enable the MAX1091/ 2-Channel Pseudo-Differential (MAX1093) MAX1093 to be shut down between conversions Software-Configurable, Unipolar/Bipolar Inputs accessing the parallel interface returns them to normal operation. Powering down between conversions can cut Low Power supply current to under 10A at reduced sampling rates. 1.9mA (250ksps) 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 MAX1091 has 2A (Shutdown) eight input channels and the MAX1093 has four input Internal 3MHz 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 (MAX1091) bined with ease of use and small package size, make 24-Pin QSOP (MAX1093) 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 MAX1091/MAX1093 tri-states INT when CS goes high. Refer to MAX1061/MAX1063 if tri-stating INT is not TOP VIEW desired. HBEN 1 24 V LOGIC The MAX1091 is available in a 28-pin QSOP package, D7 2 23 V DD while the MAX1093 is available in a 24-pin QSOP. For pin-compatible +5V, 10-bit versions, refer to the D6 3 22 REF MAX1090/MAX1092 data sheet. D5 4 21 REFADJ D4 5 20 GND Applications MAX1093 Industrial Control Systems Data Logging D3 6 19 COM Energy Management Patient Monitoring D2 7 18 CH0 Data-Acquisition Systems Touch Screens D1/D9 8 17 CH1 D0/D8 9 16 CH2 Ordering Information INT 10 15 CH3 INL PART PIN-PACKAGE TEMP RANGE (LSB) RD 11 14 CS 0C to +70C MAX1091ACEI 28 QSOP 0.5 WR 12 13 CLK 0C to +70C MAX1091BCEI 28 QSOP 1 QSOP -40C to +85C MAX1091AEEI 28 QSOP 0.5 Pin Configurations continued at end of data sheet. -40C to +85C MAX1091BEEI 28 QSOP 1 Ordering Information continued at end of data sheet. Typical Operating Circuits appear 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 AVAILABLE250ksps, +3V, 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 MAX1091 C /MAX1093 C ...........................0C to +70C Digital Outputs (D0D9, INT) to GND.....-0.3V to (V + 0.3V) MAX1091 E /MAX1093 E ........................-40C to +85C LOGIC Storage Temperature Range .............................-65C to +150C 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 = +2.7V to +3.6V, COM = GND, REFADJ = V , V = +2.5V, 4.7F capacitor at REF pin, f = 4.8MHz (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 , 250ksps, external f = 4.8MHz, 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 = 125kHz, V = 2.5V (Note 4) -78 dB P-P IN IN Full-Linear Bandwidth SINAD > 56dB 250 kHz Full-Power Bandwidth -3dB rolloff 3 MHz CONVERSION RATE External clock mode 3.3 Conversion Time (Note 5) t External acquisition/internal clock mode 2.5 3.0 3.5 s CONV Internal acquisition/internal clock mode 3.2 3.6 4.1 Track/Hold Acquisition Time t 625 ns ACQ Aperture Delay External acquisition or external clock mode 50 ns External acquisition or external clock mode <50 Aperture Jitter ps Internal acquisition/internal clock mode <200 External Clock Frequency f 0.1 4.8 MHz CLK Duty Cycle 30 70 % 2 MAX1091/MAX1093