Features: Single-Supply Operation (+2.7V to +5.25V)
Two Single-Ended Channels (MAX157) Single Pseudo-Differential Channel (MAX159)
Low Power
-0.9mA (at 108ksps, +3V)
-100µA(at 10ksps, +3V)
-10µA (at 1ksps, +3V)
-<0.2µA (power-down mode)
Internal Track/Hold
108ksps Sampling Rate
SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface
Space-Saving 8-Pin µMAX Package
Pin-Compatible 12-Bit Upgrades AvailableApplication-Battery-Powered Systems
-Instrumentation
-Portable Data Logging
-Test Equipment
-Isolated Data Acquisition
-Medical Instruments
-Process-Control Monitoring
-System SupervisionPinout
SpecificationsVDD to GND............................................................-0.3V 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 GND.............................................-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
MAX157/MAX159_C_A.........................................0°C to +70°C
MAX157/MAX159_E_A......................................-40°C to +85°C
MAX157/MAX159_MJA....................................-55°C to +125°C
Storage Temperature Range.........................-60°C to +150°C
Lead Temperature (soldering, 10sec)............................+300°CDescriptionThe MAX157/MAX159 low-power, 10-bit analog-to-digi-tal 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 succes-sive-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 through-put rates, the 0.2µA automatic shutdown further reduces power consumption.
The MAX157 provides 2-channel, single-ended opera-tion and accepts input signals from 0 to VREF. The MAX159 accepts pseudo-differential inputs ranging from 0 to VREF. An external clock accesses data through the 3-wire serial interface, which is SPI™,QSPI™, and MICROWIRE™ compatible.
Excellent dynamic performance and low power, com-bined with ease of use and a small package size, make these converters ideal for battery-powered and data acquisition applications, or for other circuits with demanding power-consumption and space require-ments. For pin-compatible 12-bit upgrades, see the MAX144/MAX145 data sheet.
MAX157 Data Sheet
