DS1616

Configuration :
Temperature Threshold :
Supply Voltage - Max :
Supply Voltage - Min :
Shutdown :
Device Function :
Output Type : Digital
Minimum Operating Temperature : - 40 C
Accuracy : +/- 2 C
Mounting Style : Through Hole
Digital Output - Bus Interface : 3-Wire
Maximum Operating Temperature : + 85 C
Package / Case : PDIP-24


Features:

 Measures four channels of data:
    − Integrated 8-bit temperature sensor,
    − Integrated 8-bit Analog-to-Digital Converter (ADC) with a three input mux for measuring up to three external     sensors
Digital thermometer measures temperature -40°C to +85°C in 0.5°C increments (-40°F to +183.2°F in 0.9°F     increments)
Digital thermometer provides ±2°C accuracy
Real Time Clock/Calendar in BCD format counts seconds, minutes, hours, date, month, day of the week, and year     with leap year compensation. The Real Time Clock is fully Y2K-compliant
Automatically wakes up and measures temperature and/or ADC data at userprogrammable intervals from 1 to 255     minutes
2048-byte datalog memory
Records long-term temperature histogram in 63 bins with 2.0°C resolution
Records long-term ADC data histogram in 64 bins with 4-bit resolution/bin (32 mV/bin) for ADC Channel One
Programmable temperature-high and -low alarm trip points
Programmable ADC data-high and -low alarm trip points
Records time stamp and duration when temperature or ADC Channel 1 Data leaves the interval specified by the     trip points
Two serial interface options: synchronous and asynchronous
    - 3-wire synchronous serial interface
    - Asynchronous serial interface compatible with standard UARTs
Memory partitioned into 32 byte pages for packetizing data
On-chip 16-bit CRC generator to safeguard data read operations in asynchronous communications mode
Unique, factory lasered 64-bit serial number

Pinout




Specifications

Voltage on VDD, Relative to Ground                              -0.3V to +7V
Voltage on any other pin, Relative to Ground                -0.3V to +7V
Operating Temperature                                                 -55°C to +125°C
Storage Temperature                                                    -55°C to +125°C
Soldering Temperature                                                  See J-STD-020A specification


Description

The DS1616 is an integrated temperature/data recorder. DS1616 combines a Real Time Clock (RTC), temperature sensor, and a three input mux'ed 8-bit Analog-to-Digital Converter (ADC). Datalogging is supported for all four data channels and the and histogram functionality is supported for the temperature sensor and ADC Channel 1 only. A programmable sample rate feature makes the device ideal for applications requiring datalogging over short or long time frames.

The RTC DS1616 provides seconds, minutes, hours, day, date, month, and year information with leap year compensation, Year 2000 compliance, and also provides an alarm interrupt. Temperature measurement is provided via integrated thermal technology which can measure temperatures from -40°C to +85°C in 0.5°C increments. An integrated three input mux'ed 8-bit ADC allows the device to record data from other types of sensors.

The datalog function of DS1616 simply samples data at a user-defined sample rate and writes the data to the Datalog memory. A total of 2048 bytes of data may be recorded. If only one data channel is selected, a total of 2048 samples can be recorded for that channel. If two channels are enabled, each channel can record 1024 samples. If three or four channels are enabled, each channel can record 512 samples. In the case of only three channels enabled, the location corresponding to the disabled channel will be 0 to allow the rollover function to work smoothly.

Histogram functionality DS1616 is provided for the Thermal Sensor and ADC Channel 1, and is implemented by sampling the data and then incrementing the count value in a data bin associated with that value. The DS1616 provides 63 2-byte data bins in 2°C increments for the temperature channel and 64 2-byte data bins in 4-bit resolution steps (32mV/bin) for the ADC Data Channel 1. The sampling rate can be programmed at intervals ranging from once per minute to once every 255 minutes.

The DS1616 provides programmable high- and low-temperature alarm trip points that allow the device to monitor whether the temperature stays within desired limits. Likewise, high- and low- trip points can be programmed for the ADC data. The device can drive an interrupt or status pin if the ADC data falls outside of the programmable limits. The Temperature Sensor and Channel 1 of the ADC can also have any event that falls outside of the programmed limits recorded with a time and date stamp and the duration of the out-of-limits condition for additional analysis in the Alarm Memory. The DS1616 can be programmed to begin sampling data via a pushbutton input or via a command sent over the serial interface by a host machine.

A 64-bit serial number is available for unique product identification and tracking.