MAX1333

19-3712; Rev 0; 5/05 3Msps/2Msps, 5V/3V, 2-Channel, TrueDifferential 12-Bit ADCs General Description The MAX1332/MAX1333 2-channel, serial-output, 12-bit, analog-to-digital converters (ADCs) feature two true-differential analog inputs and offer outstanding noise immunity and dynamic performance. Both devices easily interface with SPI™/QSPI™/MICROWIRE™ and standard digital signal processors (DSPs). The MAX1332 operates from a single supply of +4.75V to +5.25V with sampling rates up to 3Msps. The MAX1333 operates from a single supply of +2.7V to +3.6V with sampling rates up to 2Msps. These devices feature a partial power-down mode and a full powerdown mode that reduce the supply current to 3.3mA and 0.2µA, respectively. Also featured is a separate power supply input (DVDD) that allows direct interfacing to +2.7V to +3.6V digital logic. The fast conversion speed, low power dissipation, excellent AC performance, and DC accuracy (±0.6 LSB INL) make the MAX1332/MAX1333 ideal for industrial process control, motor control, and base-station applications. The MAX1332/MAX1333 are available in a space-saving (3mm x 3mm), 16-pin, TQFN package and operate over the extended (-40°C to +85°C) temperature range. Features ♦ 3Msps Sampling Rate (+5V, MAX1332) ♦ 2Msps Sampling Rate (+3V, MAX1333) ♦ Separate Logic Supply: +2.7V to +3.6V ♦ Two True-Differential Analog Input Channels ♦ Bipolar/Unipolar Selection Input ♦ Only 38mW (typ) Power Consumption ♦ Only 2µA (max) Shutdown Current ♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface ♦ 2MHz Full-Linear Bandwidth ♦ 71.4dB SINAD and -93dB THD at 525kHz Input Frequency ♦ No Pipeline Delays ♦ Space-Saving (3mm x 3mm), 16-Pin, TQFN Package MAX1332/MAX1333 Ordering Information PART MAX1333ETE TEMP RANGE PIN-PACKAGE -40°C to +85°C 16 TQFN-EP** (3mm x 3mm) MAX1332ETE* -40°C to +85°C 16 TQFN-EP** (3mm x 3mm) Applications Data Acquisition Bill Validation Motor Control Base Stations High-Speed Modems Optical Sensors Industrial Process Control *Future product—contact factory for availability. **EP = Exposed paddle. Selector Guide and Pin Configuration appear at end of data sheet. Typical Operating Circuit +2.7V TO +3.6V +4.75V TO +5.25V 1µF 0.1µF AVDD + DIFFERENTIAL INPUTS + REF INPUT VOLTAGE 1µF 0.1µF AGND AIN1P AIN1N AIN0P AIN0N REF MAX1332 CHSEL CNVST SCLK DOUT AGND DGND µC/DSP DVDD SHDN BIP/UNI 0.1µF 1µF SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 3Msps/2Msps, 5V/3V, 2-Channel, TrueDifferential 12-Bit ADCs MAX1332/MAX1333 ABSOLUTE MAXIMUM RATINGS AVDD to AGND (MAX1332) ......................................-0.3V to +6V AVDD to AGND (MAX1333) ......................................-0.3V to +4V DVDD to DGND.........................................................-0.3V to +4V AGND to DGND.....................................................-0.3V to +0.3V SCLK, CNVST, SHDN, CHSEL, BIP/UNI, DOUT to DGND ...................................-0.3V to (DVDD + 0.3V) AIN0P, AIN0N, AIN1P, AIN1N, REF to AGND...................................................-0.3V to (AVDD + 0.3V) Maximum Current into Any Pin .........................................±50mA Continuous Power Dissipation (TA = +70°C) 16-Pin TQFN (derate 17.5mW/°C above +70°C) ....1398.6mW Operating Temperature Range MAX133_ETE ...................................................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-60°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 (MAX1332) (AVDD = +4.75V to +5.25V, DVDD = +2.7V to +3.6V, fSCLK = 48MHz, VREF = 4.096V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Resolution Integral Nonlinearity Differential Nonlinearity Offset Error Gain Error Offset-Error Temperature Coefficient Gain-Error Temperature Coefficient Signal-to-Noise Ratio Signal-to-Noise Plus Distortion Total Harmonic Distortion Spurious-Free Dynamic Range Channel-to-Channel Isolation Full-Linear Bandwidth Full-Power Bandwidth Small-Signal Bandwidth CONVERSION RATE Minimum Conversion Time Maximum Throughput Rate Minimum Track-and-Hold Acquisition Time tACQ Figure 5 tCONV Figure 5 3 52 271 ns Msps ns SINAD > 68dB SNR SINAD THD SFDR 84 70 70 SYMBOL N INL DNL CONDITIONS MIN 12 ±0.6 ±0.6 ±0.9 ±0.6 ±0.2 ±1.1 ±1.0 ±1.0 ±3.0 ±6.0 TYP MAX UNITS Bits LSB LSB LSB LSB ppm/°C ppm/°C DC ACCURACY (BIP/UNI = DGND) (Note 1) DYNAMIC SPECIFICATIONS (AIN = -0.2dBFS, fIN = 525kHz, BIP/UNI = DVDD, unless otherwise noted) (Note 1) 71.5 71.4 -93 93 76 2 6 6 -84 dB dB dBc dBc dB MHz MHz MHz 2 _______________________________________________________________________________________ 3Msps/2Msps, 5V/3V, 2-Channel, TrueDifferential 12-Bit ADCs ELECTRICAL CHARACTERISTICS (MAX1332) (continued) (AVDD = +4.75V to +5.25V, DVDD = +2.7V to +3.6V, fSCLK = 48MHz, VREF = 4.096V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Aperture Delay Aperture Jitter Differential Input Voltage Range (VAIN_P - VAIN_N) Absolute Input Voltage Range DC Leakage Current Input Capacitance REFERENCE INPUT (REF) REF Input Voltage Range REF Input Capacitance REF DC Leakage Current ILKG CIN 14 AVDD + 50mV 14 ±10 0.3 x DVDD 0.7 x DVDD 100 IILKG CIN VOL VOH ILKGT COUT AVDD DVDD Normal mode; average current (fSAMPLE = 3MHz, fSCLK = 48MHz) Partial power-down mode Full power-down mode ISINK = 5mA ISOURCE = 1mA Between conversions, CNVST = DVDD Between conversions, CNVST = DVDD 4.75 2.7 11 3.5 0.1 15 5.25 3.6 12 6 2 µA DVDD 0.5 ±1 ±0.2 15 0.4 ±5 SYMBOL tAD tAJ Figure 21 Figure 21 BIP/UNI = DGND BIP/UNI = DVDD 0 -VREF / 2 AGND - 50mV CONDITIONS MIN TYP