MAX1338 19-3151 Rev 1 7/04 14-Bit, 4-Channel, Software-Programmable, Multiranging, Simultaneous-Sampling ADC General Description Features The MAX1338 14-bit, analog-to-digital converter (ADC) 150ksps Sample Rate per Channel offers four simultaneously sampled, fully differential input All Four Input Channels Simultaneously Sampled channels, with independent track-and-hold (T/H) circuitry 16ns Aperture Delay for each channel. The input channels are individually software programmable for input ranges of 10V, 5V, 100ps Aperture-Delay Matching 2.5V, and 1.25V. The input channels feature fault tol- Channel-Independent Software-Selectable Input erance to 17V. The internal T/H circuits have a 16ns Range: 10V, 5V, 2.5V, 1.25V aperture delay and 100ps aperture-delay matching. 17V Fault-Tolerant Inputs A 14-bit parallel bus provides the conversion result with a maximum per-channel output rate of 150ksps Dynamic Performance at 10kHz Input (600ksps for all four channels). The MAX1338 has an SNR: 77dB on-board oscillator and 2.5V internal reference. An SINAD: 76dB external clock and/or reference can also be used. SFDR: 98dBc The MAX1338 operates from a +5V supply for analog THD: -83dBc inputs and digital core. The device operates from a +2.7V DC Performance to +5.25V supply for the digital I/O lines. The MAX1338 INL: 2 LSB features two power-saving modes: standby mode and DNL: 1 LSB shutdown mode. Standby mode allows rapid wake-up and reduces quiescent current to 4mA (typ), and shut- Offset Error: 4 LSB down mode reduces sleep current to less than 10A (typ). Gain Error: 0.1% FSR The MAX1338 is available in an 8mm x 8mm x 0.8mm, 14-Bit Parallel Interface 56-pin, thin QFN package. The device operates over Internal Clock and Reference Voltage the extended -40C to +85C temperature range. +5V Analog and Digital Supplies Applications +2.7V to +5.25V Digital I/O Supply Multiple-Channel Data Recorders 56-Pin Thin QFN Package (8mm x 8mm x 0.8mm) Vibration Analysis Motor Control: 3-Phase Voltage, Current, and Ordering Information Power Measurement PART TEMP RANGE PIN-PACKAGE Optical Communication Equipment MAX1338ETN -40C to +85C 56 Thin QFN-EP* *EP = Exposed pad. Pin Configuration appears 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.14-Bit, 4-Channel, Software-Programmable, Multiranging, Simultaneous-Sampling ADC ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V CS, RD, WR, CONVST, to DRGND........-0.3V to (DRV + 0.3V) DD DD DV to DGND.........................................................-0.3V to +6V DD SHDN, STANDBY, CLK, EOC, DRV to DRGND....................................................-0.3V to +6V EOLC to DRGND................................-0.3V to (DRV + 0.3V) DD DD AV to DV .......................................................-0.3V to +0.3V DD DD Maximum Current into Any Pin .........................................50mA DGND to DRGND..................................................-0.3V to +0.3V Continuous Power Dissipation (T = +70C) A AGND to DGND.....................................................-0.3V to +0.3V 56-Pin Thin QFN (derate 31.3mW /C above +70C)....2500mW AGND to DRGND ..................................................-0.3V to +0.3V Operating Temperature Range ...........................-40C to +85C AIN0+, AIN0-, AIN1+, AIN1-, AIN2+, AIN2-, AIN3+, Storage Temperature Range .............................-65C to +150C AIN3- to AGND.....................................................-17V to +17V Maximum Junction Temperature .....................................+150C D0D13 to DRGND................................-0.3V to (DRV + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD REFADC, REFP1, REFP2, REFN1, REFN2, COM1, COM2 to Junction to Ambient Thermal Resistance ..................32C/W JA AGND....................................................-0.3V to (AV + 0.3V) DD Junction to Case Thermal Resistance .........................2C/W JC INTCLK/EXTCLK to AGND.......................-0.3V to (AV + 0.3V) DD 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 (AV = DV = +5.0V, DRV = +3.0V, AGND = DGND = DRGND = 0, INTCLK/EXTCLK = AGND, f = 5MHz, input range = DD DD DD CLK 10V, REFP2 = REFP1, REFN2 = REFN1, COM1 = COM2, 1.0nF from REFADC to AGND, 1.0F and 0.1F from COM1 to AGND, 0.1F from REFP1 to AGND, 0.1F from REFN1 to AGND, 1.0F from REFP1 to REFN1. Typical values are at T = +25C. T = T A A MIN to T , unless otherwise noted.) MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution N 14 Bits Integral Nonlinearity INL (Note 1) 1 3 LSB Differential Nonlinearity DNL No missing codes (Note 1) 0.25 1 LSB Offset Error (Note 1) 4 16 LSB Offset-Error Temperature 5 ppm/C Coefficient Offset-Error Matching 10 LSB Gain Error Offset nulled (Notes 1, 2) 0.1 0.35 %FSR Channel Gain-Error Matching Offset nulled 20 LSB Gain-Error Temperature Offset nulled 10 ppm/C Coefficient DYNAMIC PERFORMANCE (at f = 10kHz, A = -0.2dBFS) IN IN Sampling Rate Per Channel Simultaneous on all channels 150 ksps Signal-to-Noise Ratio SNR (Note 1) 75 77 dB Signal-to-Noise Plus Distortion SINAD (Note 1) 74 76 dB Total Harmonic Distortion THD (Note 1) -83 -80 dBc Spurious-Free Dynamic Range SFDR Range 0 (Note 1) 85 dBc Channel-to-Channel Isolation (Note 1) 80 dB ANALOG INPUTS (AIN ) Range set bits = (0,0) -10 +10 Range set bits = (0,1) -5 +5 Input Differential Voltage Range V Range set bits = (1,0) -2.5 +2.5 Range set bits = (1,1) -1.25 +1.25 2 MAX1338