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MAXIM New Products - MAX31820PAR & MAX11165
2013-08-05
MAX31820PAR
1-Wire Parasite-Power, Ambient Temperature Sensor
Parasite-Powered Digital Temperature Sensor in TO-92 Package Minimizes Wiring and is Ideal for Measuring Ambient Temperature
Description
The MAX31820PAR ambient temperature sensor provides 9-bit to 12-bit Celsius temperature measurements with ±0.5°C accuracy over a +10°C to +45°C temperature range. Over its entire -55°C to +125°C operating range, the device has ±2.0°C accuracy.
The device communicates over a 1-Wire® bus that, by definition, requires only one data line (and ground) for communication with a central microprocessor. In addition, the device derives power directly from the data line (“parasite power”), eliminating the need for an external power supply. Requiring so few pins enables the device to be placed in a 3-pin TO-92 package. The form factor of this package allows the device to be placed above the board and thus measure the ambient temperature of a system, as opposed to the board temperature that a surface-mount package would measure.
Each MAX31820PAR has a unique 64-bit serial code, which allows multiple MAX31820PAR devices to function on the same 1-Wire bus. Therefore, it is simple to use one microprocessor to control many devices distributed over a large area.
The device communicates over a 1-Wire® bus that, by definition, requires only one data line (and ground) for communication with a central microprocessor. In addition, the device derives power directly from the data line (“parasite power”), eliminating the need for an external power supply. Requiring so few pins enables the device to be placed in a 3-pin TO-92 package. The form factor of this package allows the device to be placed above the board and thus measure the ambient temperature of a system, as opposed to the board temperature that a surface-mount package would measure.
Each MAX31820PAR has a unique 64-bit serial code, which allows multiple MAX31820PAR devices to function on the same 1-Wire bus. Therefore, it is simple to use one microprocessor to control many devices distributed over a large area.
Key Features
- Unique 1-Wire Interface Requires Only One Port Pin for Communication
- Derives Power from Data Line (Parasite Power); No Local Power Supply Needed
- Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
- Requires No External Components
- Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
- ±0.5°C Accuracy from +10°C to +45°C
- Thermometer Resolution is User-Selectable from 9 Bits to 12 Bits
- Converts Temperature to 12-Bit Digital Word in 750ms (Max)
- User-Definable Nonvolatile (NV) Alarm Settings
- Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits (Temperature Alarm Condition)
- Available in 3-Pin TO-92 Package
- Software Compatible with the DS1822-PAR and DS18B20-PAR
MAX11165
16-Bit, 250ksps, 0 to 5V SAR ADC with Internal Reference in TDFN
ADC with Internal Reference and Integrated Reference Buffer Saves Space and Cost
Description
The MAX11165 16-bit, 250ksps, SAR ADC offers excellent AC and DC performance with unipolar input range, small size, and internal reference. The MAX11165 integrates an optional 6ppm/°C reference with internal buffer, saving the cost and space of an external reference.
This ADC achieves 92.2dB SNR and -105dB THD. The MAX11165 guarantees 16-bit no-missing codes.
The MAX11165 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.
The MAX11165 is offered in a 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range.
This ADC achieves 92.2dB SNR and -105dB THD. The MAX11165 guarantees 16-bit no-missing codes.
The MAX11165 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.
The MAX11165 is offered in a 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range.
Key Features
- High DC and AC Accuracy
- 16-Bit Resolution with No Missing Codes
- SNR: 92.2dB
- THD: -105dB at 10kHz
- ±0.5 LSB INL (typ)
- ±0.2 LSB DNL (typ)
- 6ppm/°C (typ) Internal Reference
- Internal Reference Buffer
- Tiny 12-Pin 3mm x 3mm TDFN Package
- 5V Analog Supply
- 2.3V to 5V Digital Supply
- 19mW at 250ksps
- Shutdown Mode Feature Available
- 250ksps Throughput Rate
- No Pipeline Delay/Latency
- Flexible Industry-Standard Serial Interface
- SPI/QSPI™/MICROWIRE®/DSP-Compatible
