MAX1456CWI+T

MAX1456CWI+T Datasheet

MAX144/MAX145

Part	Datasheet
MAX1456CWI+T	MAX1456CWI+T (pdf)

Related Parts	Information
MAX1456CWI+	MAX1456CWI+

PDF Datasheet Preview
MAX144/MAX145 +2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX The MAX144/MAX145 low-power, 12-bit analog-todigital converters ADCs are available in 8-pin µMAX and DIP packages. Both devices operate with a single +2.7V to +5.25V supply and feature a 7.4µs successive-approximation ADC, automatic power-down, fast wake-up 2.5µs , 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 of 108ksps. At slower throughput rates, the automatic shutdown 0.2µA 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 0 to VREF. An external clock accesses datathrough the 3-wire serial interface, which is SPI , QSPI , and MICROWIRE -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. Battery-Powered Systems Portable Data Logging Isolated Data Acquisition Process-Control Monitoring Instrumentation Test Equipment Medical Instruments System Supervision TOP VIEW Pin Configuration VDD 1 CH0 CH+ 2 CH1 CH- 3 GND 4 MAX144 MAX145 8 SCLK 7 DOUT 6 CS/SHDN 5 REF ARE FOR MAX145 ONLY µMAX/DIP o Single-Supply Operation +2.7V to +5.25V o Two Single-Ended Channels MAX144 One Pseudo-Differential Channel MAX145 o Low Power 0.9mA 108ksps, +3V Supply 100µA 10ksps, +3V Supply 10µA 1ksps, +3V Supply 0.2µA 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 µMAX Package o Pin-Compatible 10-Bit Versions Available Ordering Information PART TEMP RANGE PIN-PACKAGE MAX144ACUA 0°C to +70°C 8 µMAX MAX144BCUA 0°C to +70°C 8 µMAX MAX144ACPA 0°C to +70°C 8 Plastic DIP MAX144BCPA 0°C to +70°C 8 Plastic DIP MAX144BC/D 0°C to +70°C Dice* MAX144AEUA -40°C to +85°C 8 µMAX MAX144BEUA -40°C to +85°C 8 µMAX MAX144AEPA -40°C to +85°C 8 Plastic DIP MAX144BEPA -40°C to +85°C 8 Plastic DIP MAX144AMJA -55°C to +125°C 8 CERDIP MAX144BMJA -55°C to +125°C 8 CERDIP MAX145ACUA 0°C to +70°C 8 µMAX MAX145BCUA 0°C to +70°C 8 µMAX MAX145ACPA 0°C to +70°C 8 Plastic DIP MAX145BCPA 0°C to +70°C 8 Plastic DIP MAX145BC/D 0°C to +70°C Dice* MAX145AEUA -40°C to +85°C 8 µMAX MAX145BEUA -40°C to +85°C 8 µMAX MAX145AEPA -40°C to +85°C 8 Plastic DIP MAX145BEPA -40°C to +85°C 8 Plastic DIP MAX145AMJA -55°C to +125°C 8 CERDIP MAX145BMJA -55°C to +125°C 8 CERDIP INL LSB ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Dice are specified at TA = +25°C, DC parameters only. *Contact factory for availability. 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 +2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX MAX144/MAX145 ABSOLUTE MAXIMUM RATINGS VDD to GND to +6V 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. -0.3V to +6V DOUT to -0.3V to VDD + 0.3V DOUT Sink Current 25mA Continuous Power Dissipation TA = +70°C µMAX derate 4.1mW/°C above +70°C 330mW Plastic DIP derate 9.09mW/°C above +70°C ............727mW CERDIP derate 8.00mW/°C above +70°C 640mW Operating Temperature Ranges TA MAX144/MAX145_C_A to +70°C MAX144/MAX145_E_A. to +85°C MAX144/MAX145_M_A -55°C to +125°C Storage Temperature Range .............................-65°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 VDD = +2.7V to +5.25V, VREF = 2.5V, 0.1µF capacitor at REF, fSCLK = 2.17MHz, 16 clocks/conversion cycle 108ksps , CH- = GND for MAX145, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C. PARAMETER CONDITIONS MAX UNITS DC ACCURACY Note 1 Resolution Bits Relative Accuracy Note 2 MAX14_A INL MAX14_B Differential Nonlinearity DNL No missing codes over temperature Offset Error Gain Error Gain Temperature Coefficient Note 3 ppm/°C Channel-to-Channel Offset Matching Channel-to-Channel Gain Matching DYNAMIC SPECIFICATIONS fIN sine-wave = 10kHz, VIN = 2.5Vp-p, 108ksps, fSCLK = 2.17MHz, CH- = GND for MAX145 Signal-to-Noise Plus Distortion Ratio SINAD Total Harmonic Distortion including 5th-order harmonic Spurious-Free Dynamic Range SFDR Channel-to-Channel Crosstalk Small-Signal Bandwidth fIN = 65kHz, VIN = 2.5Vp-p Note 4 -3dB rolloff Full-Power Bandwidth CONVERSION RATE Conversion Time Note 5 tCONV External clock, fSCLK = 2.17MHz, 16 clocks/conversion cycle Internal clock T/H Acquisition Time Aperture Delay

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MAX144/MAX145
+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX

The MAX144/MAX145 low-power, 12-bit analog-todigital converters ADCs are available in 8-pin µMAX and DIP packages. Both devices operate with a single +2.7V to +5.25V supply and feature a 7.4µs successive-approximation ADC, automatic power-down, fast wake-up 2.5µs , 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 of 108ksps. At slower throughput rates, the automatic shutdown 0.2µA 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 0 to VREF. An external clock accesses datathrough the 3-wire serial interface, which is SPI , QSPI , and MICROWIRE -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.

Battery-Powered Systems Portable Data Logging Isolated Data Acquisition Process-Control Monitoring

Instrumentation Test Equipment Medical Instruments System Supervision

TOP VIEW

Pin Configuration

VDD 1 CH0 CH+ 2 CH1 CH- 3

GND 4

MAX144 MAX145
8 SCLK 7 DOUT 6 CS/SHDN 5 REF

ARE FOR MAX145 ONLY µMAX/DIP
o Single-Supply Operation +2.7V to +5.25V
o Two Single-Ended Channels MAX144 One Pseudo-Differential Channel MAX145
o Low Power 0.9mA 108ksps, +3V Supply 100µA 10ksps, +3V Supply 10µA 1ksps, +3V Supply 0.2µA 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 µMAX Package
o Pin-Compatible 10-Bit Versions Available
Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX144ACUA 0°C to +70°C 8 µMAX MAX144BCUA 0°C to +70°C 8 µMAX MAX144ACPA 0°C to +70°C 8 Plastic DIP MAX144BCPA 0°C to +70°C 8 Plastic DIP MAX144BC/D 0°C to +70°C Dice* MAX144AEUA -40°C to +85°C 8 µMAX MAX144BEUA -40°C to +85°C 8 µMAX MAX144AEPA -40°C to +85°C 8 Plastic DIP MAX144BEPA -40°C to +85°C 8 Plastic DIP MAX144AMJA -55°C to +125°C 8 CERDIP** MAX144BMJA -55°C to +125°C 8 CERDIP** MAX145ACUA 0°C to +70°C 8 µMAX MAX145BCUA 0°C to +70°C 8 µMAX MAX145ACPA 0°C to +70°C 8 Plastic DIP MAX145BCPA 0°C to +70°C 8 Plastic DIP MAX145BC/D 0°C to +70°C Dice* MAX145AEUA -40°C to +85°C 8 µMAX MAX145BEUA -40°C to +85°C 8 µMAX MAX145AEPA -40°C to +85°C 8 Plastic DIP MAX145BEPA -40°C to +85°C 8 Plastic DIP MAX145AMJA -55°C to +125°C 8 CERDIP** MAX145BMJA -55°C to +125°C 8 CERDIP**

INL LSB
±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
*Dice are specified at TA = +25°C, DC parameters only. **Contact factory for availability.

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
+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX

MAX144/MAX145

ABSOLUTE MAXIMUM RATINGS

VDD to GND to +6V 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. -0.3V to +6V DOUT to -0.3V to VDD + 0.3V DOUT Sink Current 25mA Continuous Power Dissipation TA = +70°C
µMAX derate 4.1mW/°C above +70°C 330mW

Plastic DIP derate 9.09mW/°C above +70°C ............727mW CERDIP derate 8.00mW/°C above +70°C 640mW Operating Temperature Ranges TA MAX144/MAX145_C_A to +70°C MAX144/MAX145_E_A. to +85°C MAX144/MAX145_M_A -55°C to +125°C Storage Temperature Range .............................-65°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

VDD = +2.7V to +5.25V, VREF = 2.5V, 0.1µF capacitor at REF, fSCLK = 2.17MHz, 16 clocks/conversion cycle 108ksps , CH- = GND for MAX145, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.

PARAMETER

CONDITIONS

MAX UNITS

DC ACCURACY Note 1

Resolution

Bits

Relative Accuracy Note 2

MAX14_A INL

MAX14_B

Differential Nonlinearity

DNL No missing codes over temperature

Offset Error

Gain Error Gain Temperature Coefficient

Note 3
ppm/°C

Channel-to-Channel Offset Matching

Channel-to-Channel Gain Matching

DYNAMIC SPECIFICATIONS fIN sine-wave = 10kHz, VIN = 2.5Vp-p, 108ksps, fSCLK = 2.17MHz, CH- = GND for MAX145

Signal-to-Noise Plus Distortion Ratio

SINAD

Total Harmonic Distortion including 5th-order harmonic

Spurious-Free Dynamic Range SFDR

Channel-to-Channel Crosstalk Small-Signal Bandwidth
fIN = 65kHz, VIN = 2.5Vp-p Note 4 -3dB rolloff

Full-Power Bandwidth

CONVERSION RATE

Conversion Time Note 5
tCONV

External clock, fSCLK = 2.17MHz, 16 clocks/conversion cycle

Internal clock

T/H Acquisition Time Aperture Delay

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Datasheet ID: MAX1456CWI+T 647222