MAX1229

Features:

Internal Temperature Sensor (±1°C Accuracy)
16-Entry First-In/First-Out (FIFO)
Analog Multiplexer with True Differential Track/Hold
                 16-, 12-, 8-Channel Single Ended
                 8-, 6-, 4-Channel True Differential
                 (Unipolar or Bipolar)
Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing
Codes Over Temperature
Scan Mode, Internal Averaging, and Internal Clock
Low-Power Single +3V Operation 0.62mA at 300ksps
Internal 2.5V Reference or External Differential Reference
10MHz 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface
Space-Saving 28-Pin 5mm x 5mm QFN Package

Application

System Supervision
Data-Acquisition Systems
Industrial Control Systems
Patient Monitoring
Data Logging
Instrumentation


Pinout




Specifications

VDD to GND..............................................................-0.3V to +6V
CS, SCLK, DIN, EOC, DOUT to GND.........    -0.3V to (VDD + 0.3V)
AIN0AIN13, REF-/AIN_, CNVST/AIN_,
REF+ to GND.........................................      -0.3V to (VDD + 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........    667mW
20-Pin QSOP (derate 9.1mW/°C above +70°C)...........    727mW
24-Pin QSOP (derate 9.5mW/°C above +70°C)...........    762mW
28-Pin QFN 5mm x 5mm       
(derate 20.8mW/°C above +70°C) ........................       1667mW
Operating Temperature Ranges
MAX12__C__.......................................................    0°C to +70°C
MAX12__E__....................................................    -40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Junction Temperature...................................................... +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX1227/MAX1229/MAX1231 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and an internal temperature sensor. These devices feature on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown™. The maximum sampling rate is 300ksps using an external clock. The MAX1231 has 16 input channels, the MAX1229 has 12 input channels, and the MAX1227 has 8 input channels. All input channels are configurable for single-ended or differential inputs in unipolar or bipolar mode. All three devices operate from a +3V supply and contain a 10MHz SPI™/QSPI™/MICROWIRE™-compatible serial port.

The MAX1231 is available in 28-pin 5mm x 5mm QFN with exposed pad and 24-pin QSOP packages. The MAX1227/MAX1229 are only available in QSOP pack- ages. All three devices are specified over the extended -40°C to +85°C temperature range.