Features: ·200ksps (Bipolar) and 150ksps (Unipolar) Sampling ADC
·14-Bits, No Missing Codes
·1LSB INL Guaranteed
·81dB (min) SINAD
·+5V Single-Supply Operation
·Low Power Operation, 7.5mA (Unipolar Mode)
·2.5µA Shutdown Mode
·Software-Configurable Unipolar & Bipolar Input Ranges
0 to +12V and ±12V (MAX1142)
0 to +4.096V and ±4.096V (MAX1143)
Internal or External Reference
·Internal or External Clock
·SPI/QSPI/MICROWIRE-Compatible Wire Serial Interface
·Three User-Programmable Logic Outputs
·Small 20-Pin SSOP Package
ApplicationIndustrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered EquipmentPinout
SpecificationsAVDD to AGND, DVDD to DGND ......................................................-0.3V to +6V
AGND to DGND............................................................................-0.3V to +0.3V
AIN to AGND..........................................................................................±16.5V
REFADJ, CREF, REF to AGND.......................................... -0.3V to (AVDD + 0.3V)
Digital Inputs to DGND..................................................................-0.3V to +6V
Digital Outputs to DGND ...............................................-0.3V to (DVDD + 0.3V)
Continuous Power Dissipation (TA = +70)
20-SSOP (derate 8.00mW/ above +70) ..........................................640mW
Operating Temperature Ranges
MAX114_CAP .................................................................................0 to +70
MAX114_EAP...............................................................................-40 to +85
Storage Temperature Range ....................................................-60 to +150
Junction Temperature.............................................................................+150
Lead Temperature (soldering, 10s) .......................................................+300DescriptionThe MAX1142/MAX1143 are 200ksps, 14-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold, a clock, +4.096V reference, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (SINAD ³ 81dB), high-speed (200ksps), and low power (7.5mA) of these ADCs, make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1142 accepts input signals of 0 to +12V (unipolar) or ±12V (bipolar), while the MAX1143 accepts input signals of 0 to +4.096V (unipolar) or ±4.096V (bipolar). Operating from a single +4.75V to +5.25V analog supply and a +4.75V to +5.25V digital supply, power-down modes reduce current consumption to 1mA at 10ksps and further reduce supply current to less than 20µA at slower data rates. A serial strobe output (SSTRB) allows direct connection
to the TMS320-family of digital signal processors. The MAX1142/MAX1143 user can select either the internal clock, or an external serial-interface clock for the ADC to perform analog-to-digital conversions.
The MAX1142/MAX1143 feature internal calibration circuitry to correct linearity and offset errors. On-demand calibration allows the user to optimize performance. Three user-programmable logic outputs are provided for the control of an 8-channel MUX or a PGA.
MAX1142 Data Sheet
