MAX1106CUB

19-1432; Rev 0; 3/99 Single-Supply, Low-Power, Serial 8-Bit ADCs General Description 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. Features o Single Supply: +2.7V to +3.6V (MAX1106) +4.5V to +5.5V (MAX1107) o Low Power: 96µA at +3V and 25ksps 0.5µA in Power-Down Mode o Pin-Programmable Configuration o 0 to VDD Input Voltage Range o Internal Track/Hold o Internal Reference: +2.048V (MAX1106) +4.096V (MAX1107) o 1V to VDD Reference Input Range o SPI/QSPI/MICROWIRE-Compatible Serial Interface o Small 10-Pin µMAX Package MAX1106/MAX1107 Ordering Information PART MAX1106CUB MAX1106EUB MAX1107CUB MAX1107EUB TEMP. RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE 10 µMAX 10 µMAX 10 µMAX 10 µMAX Applications Portable Data Logging Hand-Held Measurement Devices Medical Instruments System Diagnostics Solar-Powered Remote Systems 4–20mA-Powered Remote Systems Receive-Signal-Strength Indicators Functional Diagram VDD CONVST SCLK OUTPUT SHIFT REGISTER Pin Configuration TOP VIEW VDD 1 IN+ INGND REFOUT 2 3 4 5 10 SCLK 9 DOUT SHDN CONVST REFIN SHDN MAX1106 MAX1107 INTERNAL OSCILLATOR CONTROL LOGIC DOUT MAX1106 MAX1107 8 7 6 IN+ INREFOUT ANALOG INPUT MUX INTERNAL REFERENCE T/H CHARGE REDISTRIBUTION DAC SAR µMAX REFIN GND SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ 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. Single-Supply, Low-Power, Serial 8-Bit ADCs MAX1106/MAX1107 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 DC ACCURACY Resolution Relative Accuracy (Note 1) Differential Nonlinearity Offset Error Gain Error (Note 3) Gain Temperature Coefficient Total Unadjusted Error TUE TA = +25°C TA = TMIN to TMAX ±0.5 49 -70 68 -3dB rolloff 1.5 0.8 VIN_ VIN+ to VINOn/off-leakage current, VIN+ or VIN- = 0 or VDD CIN 0 ±0.01 18 VREFIN ±1 ±0.8 ±1 INL DNL VDD = 2.7V to 3.6V VDD = 5.5V (Note 2) No missing codes over temperature VDD = 2.7V to 3.6V VDD = 5.5V (Note 2) ±0.2 ±0.5 ±1 8 ±0.15 ±0.2 ±1 ±1 ±0.5 Bits LSB LSB LSB LSB ppm/°C LSB SYMBOL CONDITIONS MIN TYP MAX UNITS 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 Full-Power Bandwidth ANALOG INPUTS Input Voltage Range (Note 4) Input Leakage Current Input Capacitance V µA pF SINAD THD SFDR BW-3dB dB dB dB MHz MHz 2 _______________________________________________________________________________________ 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 TRACK/HOLD Conversion Time Track/Hold Acquisition Time Aperture Delay Aperture Jitter Internal Clock Frequency External Clock Frequency Range INTERNAL REFERENCE Output Voltage REF Short-Circuit Current REF Tempco Load Regulation Capacitive Bypass at REFOUT EXTERNAL REFERENCE Input Voltage Range Input Current POWER REQUIREMENTS Supply Voltage VDD VDD = 3.6V, CL = 10pF Supply Current (Notes 2, 7) IDD VDD = 5.5V, CL = 10pF Power down, VDD = 3.6V Power-Supply Rejection (Note 8) PSR Full-scale input, VDD = 2.7V to 3.6V VDD ≤ 3.6V VDD > 3.6V 0.8 0.2 ±1 ±1 15 DIGITAL INPUTS (SHDN, SCLK, and CONVST) Threshold Voltage High Threshold Voltage Low Input Hysteresis Input Current High Input Current Low Input Capacitance VIH VIL VHYST IIH IIL CIN 2 3 V V V V µA µA pF 2.7 3 96 115 0.5 ±0.4 2.5 ±4 mV 5.5 250 µA V VREFIN +2.048V at REFIN, full scale 1.0 1 VDD + 0.05 20 V µA 0 to 0.5mA (Note 6) 1 VREFOUT IREFSC (Note 5) 1.968 2.048 150 ±50 4 2.128 V µA ppm/°C mV µF For data transfer only tCONV tACQ Figure 7 1 10