MAX1107EUB+

19-1432; Rev 0; 3/99 Single-Supply, Low-Power, Serial 8-Bit ADCs The MAX1106/MAX1107 low-power, 8-bit, single-channel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H), voltage reference, clock, and serial interface. The MAX1106 is specified from +2.7V to +3.6V and consumes only 96µA. The MAX1107 is specified from +4.5V to +5.5V and consumes only 107µA. The analog inputs are pin-configurable, allowing unipolar and singleended or differential operation. The full-scale analog input range is determined by the internal reference of +2.048V (MAX1106) or +4.096V (MAX1107), or by an externally applied reference ranging from 1V to VDD. The MAX1106/MAX1107 also feature a pin-selectable power-down mode that reduces power consumption to 0.5µA when the device is not in use. The 3-wire serial interface directly connects to SPI™, QSPI™, and MICROWIRE™ devices without external logic. Conversions up to 25ksps are performed using the internal clock. The MAX1106/MAX1107 are available in a 10-pin µMAX package with a footprint that is just 20% of an 8-pin plastic DIP. Applications Portable Data Logging Hand-Held Measurement Devices Features ♦ Single Supply: +2.7V to +3.6V (MAX1106) +4.5V to +5.5V (MAX1107) ♦ Low Power: 96µA at +3V and 25ksps 0.5µA in Power-Down Mode ♦ Pin-Programmable Configuration ♦ 0 to VDD Input Voltage Range ♦ Internal Track/Hold ♦ Internal Reference: +2.048V (MAX1106) +4.096V (MAX1107) ♦ 1V to VDD Reference Input Range ♦ SPI/QSPI/MICROWIRE-Compatible Serial Interface ♦ Small 10-Pin µMAX Package Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX1106CUB 0°C to +70°C 10 µMAX MAX1106EUB -40°C to +85°C 10 µMAX MAX1107CUB 0°C to +70°C 10 µMAX MAX1107EUB -40°C to +85°C 10 µMAX Medical Instruments System Diagnostics Functional Diagram Solar-Powered Remote Systems 4–20mA-Powered Remote Systems VDD CONVST SCLK Receive-Signal-Strength Indicators Pin Configuration SHDN MAX1106 MAX1107 OUTPUT SHIFT REGISTER DOUT TOP VIEW VDD 1 10 SCLK IN+ 2 9 DOUT IN- 3 8 SHDN GND 4 7 CONVST REFOUT 5 6 REFIN MAX1106 MAX1107 INTERNAL OSCILLATOR CONTROL LOGIC IN+ INREFOUT µMAX SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ANALOG INPUT MUX INTERNAL REFERENCE T/H SAR CHARGE REDISTRIBUTION DAC REFIN GND ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX1106/MAX1107 General Description MAX1106/MAX1107 Single-Supply, Low-Power, Serial 8-Bit ADCs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V IN+, IN-, REFIN, REFOUT, DOUT to GND..........................................-0.3V to (VDD + 0.3V) SHDN, SCLK, CONVST to GND ...............................-0.3V to +6V Continuous Power Dissipation (TA = +70°C) 10-pin µMAX (derate 5.6mW/°C above +70°C) ............444mW Operating Temperature Ranges MAX110_CUB ......................................................0°C to +70°C MAX110_EUB ...................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+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—MAX1106 (VDD = +2.7V to +3.6V; IN- to GND; fSCLK = 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at REFIN; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Relative Accuracy (Note 1) INL Differential Nonlinearity DNL Offset Error Bits VDD = 2.7V to 3.6V ±0.15 VDD = 5.5V (Note 2) ±0.2 No missing codes over temperature ±1 VDD = 2.7V to 3.6V ±0.2 VDD = 5.5V (Note 2) ±0.5 Gain Error (Note 3) ±1 ±1 Gain Temperature Coefficient Total Unadjusted Error ±0.5 ±0.8 TUE TA = +25°C LSB LSB LSB ppm/°C ±1 TA = TMIN to TMAX LSB ±0.5 LSB DYNAMIC PERFORMANCE (10kHz sine-wave input, 2.048Vp-p, 25ksps conversion rate) Signal-to-Noise Plus Distortion Total Harmonic Distortion (up to the 5th harmonic) Spurious-Free Dynamic Range Small-Signal Bandwidth SINAD 49 dB THD -70 dB SFDR BW-3dB -3dB rolloff Full-Power Bandwidth 68 dB 1.5 MHz 0.8 MHz ANALOG INPUTS Input Voltage Range (Note 4) VIN_ On/off-leakage current, VIN+ or VIN- = 0 or VDD Input Leakage Current Input Capacitance 2 VIN+ to VIN- CIN 0 ±0.01 18 _______________________________________________________________________________________ VREFIN V ±1 µA pF Single-Supply, Low-Power, Serial 8-Bit ADCs (VDD = +2.7V to +3.6V; IN- to GND; fSCLK = 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at REFIN; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 35 µs TRACK/HOLD Conversion Time tCONV Track/Hold Acquisition Time tACQ Figure 7 1 µs Aperture Delay 10 Aperture Jitter 3.6V 3 V V Full-scale input, VDD = 2.7V to 3.6V DIGITAL INPUTS (SHDN, SCLK, and CONVST) Threshold Voltage High Threshold Voltage Low Input Hysteresis Input Current High VIH VIL VHYST 0.8 V 0.2 IIH Input Current Low IIL Input Capacitance CIN 15 V ±1 µA ±1 µA pF _______________________________________________________________________________________ 3 MAX1106/MAX1107 ELECTRICAL CHARACTERISTICS—MAX1106 (continued) MAX1106/MAX1107 Single-Supply, Low-Power, Serial 8-Bit ADCs ELECTRICAL CHARACTERISTICS—MAX1106 (continued) (VDD = +2.7V to +3.6V; IN- to GND; fSCLK = 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at REFIN; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL OUTPUT (DOUT) Output High Voltage VOH Output Low Voltage VOL Three-State Leakage Current Three-State Output Capacitance ISOURCE = 0.5mA VDD - 0.5 V ISINK = 5mA ISINK = 16mA 0.4 V V ±10 µA 0.8 IL Figure 6, DOUT High-Z ±0.01 COUT Figure 6, DOUT High-Z 15 pF TIMING CHARACTERISTICS (Figures 6 and 7) Acquisition Time tACQ 1 µs CONVST Pulse Width High tCSPW 1 µs CONVST Fall to Output Data Valid tCONV CONVST Rise to Output Enable SCLK Fall to Output Data Valid SCLK Pulse Width High SCLK Pulse Width Low SCLK Low to Output Disable SCLK Low to CONVST Rise SHDN Fall to Output Disable Wake-Up Time 4 tDV tDO tCH tCL tTR tSCC Figure 1, CLOAD = 100pF Figure 1, CLOAD = 100pF tSHDN Figure 2, CLOAD = 100pF External reference Internal reference (Note 9) tWAKE 20 200 200 Figure 2, CLOAD = 100pF 35 µs 240 200 ns ns ns ns ns ns ns µs ms 240 100 240 20 12 _______________________________________________________________________________________ Single-Supply, Low-Power, Serial 8-Bit ADCs (VDD = +4.5V to +5.5V; IN- = GND; fSCLK = 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +4.096V reference at REFIN; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Relative Accuracy (Note 1) INL Differential Nonlinearity DNL Bits ±0.15 No missing codes over temperature Offset Error ±0.2 Gain Error (Note 3) ±0.5 LSB ±1 LSB ±1 LSB ±1 Gain Temperature Coefficient Total Unadjusted Error ±0.8 TUE TA = +25°C ±1 TA = TMIN to TMAX LSB ppm/°C ±0.5 LSB DYNAMIC PERFORMANCE (10kHz sine-wave input, 4.096Vp-p, 25ksps conversion rate) Signal-to-Noise Plus Distortion SINAD 49 dB Total Harmonic Distortion (up to the 5th harmonic) THD -70 dB Spurious-Free Dynamic Range SFDR 68 dB 1.5 MHz 0.8 MHz Small-Signal Bandwidth BW-3dB -3dB rolloff Full-Power Bandwidth ANALOG INPUTS Input Voltage Range (Note 4) VIN_ 0 On/off-leakage current, VIN+ or VIN- = 0 or VDD Input Leakage Current Input Capacitance VIN+ to VIN- ±0.01 CIN VREFIN V ±1 µA 18 pF TRACK/HOLD Conversion Time tCONV Track/Hold Acquisition Time tACQ Figure 7 35 1 µs µs Aperture Delay 10 ns Aperture Jitter