Details, datasheet, quote on part number: MAX145AMJA
CategoryData Conversion => ADC (Analog to Digital Converters)
Description+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin Max
CompanyMaxim Integrated Products
DatasheetDownload MAX145AMJA datasheet
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Features, Applications

The MAX144/MAX145 low-power, 12-bit analog-todigital converters (ADCs) are available in 8-pin 然AX and DIP packages. Both devices operate with a single to +5.25V supply and feature a 7.4盜 successive-approximation ADC, automatic power-down, fast wake-up (2.5盜), an on-chip clock, and a high-speed, 3-wire serial interface. Power consumption is only 3.2mW (VDD +3.6V) at the maximum sampling rate 108ksps. At slower throughput rates, the automatic shutdown (0.2渙) further reduces power consumption. The MAX144 provides 2-channel, single-ended operation and accepts input signals from 0 to VREF. The MAX145 accepts pseudo-differential inputs ranging from to V REF. An external clock accesses datathrough the 3-wire serial interface, which is SPITM, QSPITM, and MICROWIRETM-compatible. Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and dataacquisition applications, or for other circuits with demanding power-consumption and space requirements. For pin-compatible 10-bit ADCs, see the MAX157 and MAX159 data sheets.


o Single-Supply Operation +5.25V) o Two Single-Ended Channels (MAX144) One Pseudo-Differential Channel (MAX145) o Low Power (108ksps, +3V Supply) (10ksps, +3V Supply) (1ksps, +3V Supply) 0.2渙 (Power-Down Mode) o Internal Track/Hold o 108ksps Sampling Rate o SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface o Space-Saving 8-Pin 然AX Package o Pin-Compatible 10-Bit Versions Available

PART MAX144ACPA MAX144BCPA TEMP RANGE to +70蚓 PIN-PACKAGE 8 然AX 8 然AX 8 Plastic DIP 8 Plastic DIP Dice* 8 然AX 8 然AX INL (LSB)


Battery-Powered Systems Portable Data Logging Isolated Data Acquisition Process-Control Monitoring Instrumentation Test Equipment Medical Instruments System Supervision

+85蚓 8 Plastic DIP +85蚓 8 Plastic DIP +125蚓 8 CERDIP** +85蚓 8 CERDIP** 8 然AX 8 然AX 8 Plastic DIP 8 Plastic DIP Dice* 8 然AX 8 然AX 8 Plastic DIP 8 Plastic DIP

+125蚓 8 CERDIP** +125蚓 8 CERDIP** *Dice are specified +25蚓, DC parameters only. **Contact factory for availability.

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, or visit Maxim's website at

VDD CH0, CH1 (CH+, CH-) to GND................. -0.3V to (VDD + 0.3V) REF to GND.............................................. -0.3V to (VDD + 0.3V) Digital Inputs to GND............................................. to +6V DOUT to GND............................................ -0.3V to (VDD + 0.3V) DOUT Sink Current........................................................... 25mA Continuous Power Dissipation (TA = +70蚓) 然AX (derate 4.1mW/蚓 above +70蚓).................... 330mW Plastic DIP (derate 9.09mW/蚓 above +70蚓)............727mW CERDIP (derate 8.00mW/蚓 above +70蚓).............. 640mW Operating Temperature Ranges (TA) to +125蚓 Storage Temperature to +150蚓 Lead Temperature (soldering, 10s).................................+300蚓

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.

+5.25V, V REF 2.5V, 0.1湩 capacitor at REF, f SCLK 2.17MHz, 16 clocks/conversion cycle (108ksps), CH- = GND for TA = TMIN to TMAX, unless otherwise noted. Typical values are = +25蚓.) PARAMETER DC ACCURACY (Note 1) Resolution Relative Accuracy (Note 2) Differential Nonlinearity Offset Error Gain Error Gain Temperature Coefficient Channel-to-Channel Offset Matching Channel-to-Channel Gain Matching (Note RES INL DNL MAX14_B No missing codes over temperature Bits LSB ppm/蚓 LSB SYMBOL CONDITIONS MIN TYP MAX UNITS

DYNAMIC SPECIFICATIONS (fIN(sine-wave) = 10kHz, VIN 2.5Vp-p, 108ksps, fSCLK = 2.17MHz, CH- = GND for MAX145) Signal-to-Noise Plus Distortion Ratio Total Harmonic Distortion (including 5th-order harmonic) Spurious-Free Dynamic Range Channel-to-Channel Crosstalk Small-Signal Bandwidth Full-Power Bandwidth CONVERSION RATE Conversion Time (Note 5) T/H Acquisition Time Aperture Delay Aperture Jitter Serial Clock Frequency 2 fSCLK External clock mode Internal clock mode, for data transfer only 0.1 0 tCONV tACQ External clock, fSCLK 2.17MHz, 16 clocks/conversion cycle Internal clock ns ps MHz 盜 SINAD THD SFDR fIN = 65kHz, VIN = 2.5Vp-p (Note 4) -3dB rolloff dB MHz

+5.25V, V REF 2.5V, 0.1湩 capacitor at REF, f SCLK 2.17MHz, 16 clocks/conversion cycle (108ksps), CH- = GND for TA = TMIN to TMAX, unless otherwise noted. Typical values are = +25蚓.) PARAMETER ANALOG INPUTS Analog Input Voltage Range Multiplexer Leakage Current Input Capacitance EXTERNAL REFERENCE Input Voltage Range Input Current Input Resistance Shutdown REF Input Current DIGITAL INPUTS (CS/SHDN) AND OUTPUT (DOUT) VDD 3.6V Input High Voltage VIH VDD > 3.6V Input Low Voltage Input Hysteresis Input Leakage Current Input Capacitance Output Low Voltage Output High Voltage Three-State Output Leakage Current Three-State Output Capacitance POWER REQUIREMENTS Positive Supply Voltage Positive Supply Current Power-Supply Rejection VDD IDD PSR Operating mode Shutdown, CS/SHDN = GND VDD to 5.25V, VREF = 2.5V, full-scale input (Note 渙 mV COUT VIL VHYS IIN CIN VOL VOH VIN 0 or VDD (Note 8) ISINK = 5mA ISINK = 16mA ISOURCE = 0.5mA CS/SHDN = VDD CS/SHDN = VDD (Note 8) VDD VREF (Note 7) VREF = 2.5V VDD k 渙 CIN VIN (Note 6) On/off leakage current, VIN 0 to VDD 0.01 16 VREF 渙 pF SYMBOL CONDITIONS MIN TYP MAX UNITS


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