DC1208A Analog Devices

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1208A LTC4151CDD HIGH VOLTAGE MONITOR WITH ADC AND I2C LTC4151CDD DESCRIPTION Demonstration circuit 1208A features the down jumper enables the LTC4151 or disables it LTC4151 high side power monitor that accepts into a low current shutdown state. I2C communi- input voltages from 7V to 80V. In default opera- cation can be performed through the QuickEval tion mode, the onboard 12-bit ADC continuously system for evaluation of the part. measures high side current, input voltage and an DC1208A can also be used in an assembly option external voltage. Data is reported through the I2C with the LTC4151-1 which features split I2C data interface when polled by a host. The monitors can pins with data in and an inverted output to drive also perform on-demand measurement in a snap- opto-isolators. shot mode. The LTC4151 features a dedicated Design files for this circuit board are available. shutdown pin to reduce power consumption. Call the LTC factory. DC1208A has jumpers on ADR1 and ADR0 to se- PowerPath is a trademark of Linear Technology Corporation lect one of nine distinct I2C addresses. A shut- Table 1. Typical DC1208A Performance Summary (T = 25C) A PARAMETER CONDITION VALUE Minimum Input Voltage Voltage at VIN 7V LTC4151 Maximum Operating Input Voltage 80V Maximum Input Voltage DC1208 Maximum Operating VIN Voltage (Note 1) 75V Shutdown JP3 on FLOAT 1mA LTC4151 Supply Current Shutdown JP3 on LO 100A ADC Resolution 12 Bits (SENSE+ SENSE-) 81.92mV Full Scale Voltage VIN 102.4V ADIN 2.048V Full Scale Current R1 (Sense) = 0.02, I = (SENSE+ SENSE-) / R1 4.096A (SENSE+ SENSE-) 20V LSB Step Size VIN 25mV ADIN 0.5mV Note 1: DC1208 has a Transient Voltage Suppressor to assist with protection from voltages that can exceed absolute maxi- mum voltages. 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1208A LTC4151CDD HIGH VOLTAGE MONITOR WITH ADC AND I2C QUICK START PROCEDURE Demonstration circuit 1208A is easy to set up to 3. Connect I2C master to SDA and SCL or con- evaluate the performance of the LTC4151. Refer nect QuickEval demonstration board to J1 to Figure 1 for proper measurement equipment through 14-pin ribbon cable and open software. setup and follow the procedure below: 4. Connect the input power supply across VIN and 1. Select I2C Address by setting JP1 and JP2. GND. 2. Place jumper JP3 on FLOAT to enable the 5. Apply a load from VOUT to GND. LTC4151. 6. Apply a voltage at ADIN. 7. Read and write to the LTC4151 through I2C. Figure 1. DC1208 Proper Measurement Equipment Setup 2