MAX1083AEUE

19-1690 Rev 0; 5/00 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference General Description The MAX1082/MAX1083 10-bit analog-to-digital converters (ADCs) combine a 4-channel analog-input multiplexer, high-bandwidth track/hold (T/H), and serial interface with high conversion speed and low power consumption. The MAX1082 operates from a single +4.5V to +5.5V supply; the MAX1083 operates from a single +2.7V to +3.6V supply. Both devices’ analog inputs are software configurable for unipolar/bipolar and single-ended/pseudo-differential operation. The 4-wire serial interface connects directly to SPI™/QSPI™ and MICROWIRE™ devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1082/ MAX1083 use an external serial-interface clock to perform successiveapproximation analog-to-digital conversions. The devices feature an internal +2.5V reference and a reference-buffer amplifier with a ±1.5% voltage-adjustment range. An external reference with a 1V to VDD range may also be used. The MAX1082/MAX1083 provide a hard-wired SHDN pin and four software-selectable power modes (normal operation, reduced power (REDP), fast power-down (FASTPD), and full power-down (FULLPD)). These devices can be programmed to shut down automatically at the end of a conversion or to operate with reduced power. When using the power-down modes, accessing the serial interface automatically powers up the devices, and the quick turnon time allows them to be shut down between all conversions. The MAX1082/MAX1083 are available in 16-pin TSSOP packages. Features o 4-Channel Single-Ended or 2-Channel Pseudo-Differential Inputs o Internal Multiplexer and Track/Hold o Single-Supply Operation +4.5V to +5.5V (MAX1082) +2.7V to +3.6V (MAX1083) o Internal +2.5V Reference o 400kHz Sampling Rate (MAX1082) o Low Power: 2.5mA (400ksps) 1.3mA (REDP) 0.9mA (FASTPD) 2µA (FULLPD) o SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface o Software-Configurable Unipolar or Bipolar Inputs o 16-Pin TSSOP Package MAX1082/MAX1083 Ordering Information PART MAX1082ACUE MAX1082BCUE MAX1082AEUE TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C PINPACKAGE 16 TSSOP 16 TSSOP 16 TSSOP INL (LSB) ±1/2 ±1 ±1/2 Ordering Information continued at end of data sheet. Applications Portable Data Logging Data Acquisition Medical Instruments Battery-Powered Instruments Pen Digitizers Process Control VDD1 1 CH0 2 CH1 3 CH2 4 CH3 5 COM 6 SHDN 7 Pin Configuration TOP VIEW 16 VDD2 15 SCLK 14 CS MAX1082 MAX1083 13 DIN 12 SSTRB 11 DOUT 10 GND 9 REFADJ Typical Operating Circuit appears at end of data sheet. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. REF 8 TSSOP ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference MAX1082/MAX1083 ABSOLUTE MAXIMUM RATINGS VDD_ to GND............................................................ -0.3V to +6V VDD_ to VDD2 ....................................................... -0.3V to +0.3V CH0–CH3, COM to GND ............................ -0.3V to (VDD - 0.3V) REF, REFADJ to GND .................................. -0.3V to VDD - 0.3V) Digital Inputs to GND .............................................. -0.3V to +6V Digital Outputs to GND.............................. -0.3V to (VDD + 0.3V) Digital Output Sink Current .................................................25mA Continuous Power Dissipation (TA = +70°C) 16-Pin TSSOP (derate 6.7mW/°C above +70°C) ........ 533mW Operating Temperature Ranges MAX1082_C_E/MAX1083_CUE ......................... 0°C to +70°C MAX1082_E_E/MAX1083_EUE ....................... -40°C to +85°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—MAX1082 (VDD1 = VDD2 = +4.5V to +5.5V, COM = GND, fOSC = 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external +2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER DC ACCURACY (Note 1) Resolution Relative Accuracy (Note 2) Differential Nonlinearity Offset Error Gain Error (Note 3) Gain-Error Temperature Coefficient Channel-to-Channel Offset-Error Matching ±1.6 ±0.2 INL DNL MAX1082A MAX1083B No missing codes over temperature 10 ±0.5 ±1.0 ±1.0 ±3.0 ±3.0 bits LSB LSB LSB LSB ppm/°C LSB SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC SPECIFICATIONS (100kHz sine-wave input, 2.5Vp-p, 400ksps, 6.4MHz clock, bipolar input mode) Signal-to-Noise plus Distortion Ratio Total Harmonic Distortion Spurious-Free Dynamic Range Intermodulation Distortion Channel-to-Channel Crosstalk (Note 4) Full-Power Bandwidth Full-Linear Bandwidth CONVERSION RATE Conversion Time (Note 5) Track/Hold Acquisition Time Aperture Delay Aperture Jitter Serial Clock Frequency Duty Cycle fSCLK 0.5 40 tCONV tACQ 10 58dB Up to the 5th harmonic 60 -70 70 76 -78 6 350 dB dB dB dB dB MHz kHz 2 _______________________________________________________________________________________ 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference MAX1082/MAX1083 ELECTRICAL CHARACTERISTICS—MAX1082 (continued) (VDD1 = VDD2 = +4.5V to +5.5V, COM = GND, fOSC = 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external +2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS Unipolar, VCOM = 0 VCH_ Bipolar, VCOM or VCH_ = VREF/2, referenced to COM or CH_ On/off leakage current, VCOM VCH_ = 0 or VDD1 ±0.001 18 VREF TA = +25°C 2.480 2.500 15 TC VREF 0 to 1mA output load 4.7 0.01 1.22 For small adjustments, from 1.22V To power down the internal reference 1.4 +2.05 1.0 200 VDD1 + 50mV 350 320 5 3.0 0.8 0.2 VIN = 0 or VDD2 15 ISINK = 5mA ISOURCE = 1mA CS = VDD2 CS = VDD2 15 4 ±10 0.4 ±1 µA mA ±100 VDD1 - 1.0 ±15 0.05 2.0 10 10 2.520 MIN TYP MAX VREF ±VREF/2 ±1 V µA pF V mA ppm/°C mV/mA µF µF V mV V V/V UNITS ANALOG INPUTS (CH3–CH0, COM) Input Voltage Range, Single Ended and Differential (Note 6) Multiplexer Leakage Current Input Capacitance INTERNAL REFERENCE REF Output Voltage REF Short-Circuit Current REF Output Temperature Coefficient Load Regulation (Note 7) Capacitive Bypass at REF Capacitive Bypass at REFADJ REFADJ Output Voltage REFADJ Input Range REFADJ Buffer Disable Threshold Buffer Voltage Gain EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF) REF Input Voltage Range (Note 8) VREF = 2.500V, fSCLK = fMAX REF Input Current DIGITAL INPUTS (DIN, SCLK, CS, SHDN) Input High Voltage Input Low Voltage Input Hysteresis Input Leakage Input Capacitance DIGITAL OUTPUTS (DOUT, SSTRB) Output Voltage Low Output Voltage High Three-State Leakage Current Three-State Output Capacitance VOL VOH IL COUT V V µA pF VINH VINL VHYST IIN CIN V V V µA pF VREF = 2.500V, fSCLK = 0 In full power-down mode, fSCLK = 0 V _______________________________________________________________________________________ 3 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference MAX1082/MAX1083 ELECTRICAL CHARACTERISTICS—MAX1082 (continued) (VDD1 = VDD2 = +4.5V to +5.5V, COM = GND, fOSC = 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external +2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER POWER SUPPLY Positive Supply Voltage (Note 9) VDD1, VDD2 Normal operating mode (Note 10) Supply Current IVDD1 + IVDD2 Power-Supply Rejection PSR VDD1 = VDD2 = 5.5V Reduced-power mode (Note 11) Fast power-down mode (Note 11) Full power-down mode (Note 11) VDD1 = VDD2 = 5V ±10%, midscale input 4.5 2.5 1.3 0.9 2.0 ±0.5 5.5 4.0 2.0 1.5 10 ±2.0 µA mV mA V SYMBOL CONDITIONS MIN TYP MAX UNITS ELECTRICAL CHARACTERISTICS—MAX1083 (VDD1 = VDD2 = +2.7V to +3.6V, COM = GND, fOSC = 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external +2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER DC ACCURACY (Note 1) Resolution Relative Accuracy (Note 2) Differential Nonlinearity Offset Error Gain Error (Note 3) Gain-Error Temperature Coefficient Channel-to-Channel Offset-Error Matching ±1.6 ±0.2 INL DNL MAX1083A MAX1083B No missing codes over temperature 10 ±0.5 ±1.0 ±1.0 ±3.0 ±3.0 bits LSB LSB LSB LSB ppm/°C LSB SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC SPECIFICATIONS (75kHz sine wave input, 2.5Vp-p, 300 ksps, 4.8 MHz clock, bipolar input mode) Signal-to-Noise plus Distortion Ratio Total Harmonic Distortion Spurious-Free Dynamic Range Intermodulation Distortion Channel-to-Channel Crosstalk (Note 4) Full-Power Bandwidth Full-Linear Bandwidth SINAD THD SFDR IMD fIN1 = 73kHz, fIN2 =77kHz f = 150kHz, VIN = 2.5Vp-p -3dB point SINAD > 58dB Up to the 5th harmonic 60 -70 70 76 -78 3 250 dB dB dB dB dB MHz kHz 4 _______________________________________________________________________________________ 300ksps/400ksps, Single-Supply, 4-Channel, Serial 10-Bit ADCs with Internal Reference ELECTRICAL CHARACTERISTICS—MAX1083 (continued) (VDD1 = VDD2 = +2.7V to +3.6V, COM = GND, fOSC = 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external +2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER CONVERSION RATE Conversion Time (Note 5) Track/Hold Acquisition Time Aperture Delay Aperture Jitter Serial Clock Frequency Duty Cycle ANALOG INPUTS (CH3–CH0, COM) Input Voltage Range, Single Ended and Differential (Note 6) Multiplexer Leakage Current Input Capacitance INTERNAL REFERENCE REF Output Voltage REF Short-Circuit Current REF Output Temperature Coefficient Load Regulation (Note 7) Capacitive Bypass at REF Capacitive Bypass at REFADJ REFADJ Output Voltage REFADJ Input Range REFADJ Buffer Disable Threshold Buffer Voltage Gain EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF) Buffer Voltage Gain REF Input Voltage Range (Note 8) VREF = 2.500V, fSCLK = fMAX REF Input Current DIGITAL INPUTS (DIN, SCLK, CS, SHDN) Input High Voltage Input Low Voltage Input Hysteresis Input Leakage Input Capacitance VINH VINL VHYST IIN CIN VIN = 0 or VDD2 15 0.2 ±1 2.0 0.8 V V V µA pF VREF = 2.500V, fSCLK = 0 In full power-down mode, fSCLK = 0 1.0 200 For small adjustments, from 1.22V To power down the internal reference 1.4 +2.05 2.05 VDD1 + 50mV 350 320 5 µA TC VREF 0 to 0.75mA output load 4.7 0.01 1.22 ±100 VDD1 - 1 VREF TA = +25°C 2.480 2.500 15 ±15 0.1 2.0 10 10 2.520 V mA ppm/°C mV/mA µF µF V mV V V/V V/V V Unipolar, VCOM = 0 VCH_ Bipolar, VCOM or VCH_ = VREF/2, referenced to COM or CH_ On/off leakage current, VCH_ = 0 or VDD1 ±0.001 18 VREF ±VREF/2 ±1 V µA pF fSCLK Normal operating mode 0.5 40 tCONV tACQ Normal operating mode Normal operating mode 10