AD7294BSUZ Part Information
The AD7294 contains all the functions required for general- purpose monitoring and control of current, voltage, and temperature integrated into a single-chip solution. The device includes low voltage (±200 mV) analog input sense amplifiers for current monitoring across shunt resistors, temperature sense inputs, and four uncommitted analog input channels multiplexed into a SAR analog-to-digital converter (ADC) with a 3 μs conver- sion time. A high accuracy internal reference is provided to drive both the digital-to-analog converter (DAC) and ADC. Four 12-bit DACs provide the outputs for voltage control. The AD7294 also includes limit registers for alarm functions. The device is designed on Analog Devices, Inc., high voltage DMOS process for high voltage compliance, 59.4 V on the current sense inputs, and up to a 15 V DAC output voltage. The AD7294 is a highly integrated solution that offers all the functionality necessary for precise control of the power amplifier in cellular base station applications. In these types of applications, the DACs provide 12-bit resolution to control the bias currents of the power transistors. Thermal diode-based temperature sensors are incorporated to compensate for temperature effects. The ADC monitors the high-side current and temperature. All this function- ality is provided in a 64-lead TQFP or a 56-lead LFCSP operating over a temperature range of −40°C to +105°C.
- 12-bit SAR ADC with 3 u03bcs conversion time 4 uncommitted analog inputs Differential/single-ended VREF, 2 u00d7 VREF input ranges 2 high-side current sense inputs 5 V to 59.4 V operating range 0.5% max gain error u00b1200 mV input range 2 external diode temperature sensor inputs u221255u00b0C to +150u00b0C measurement range u00b12u00b0C accuracy Series resistance cancellation 1 internal temperature sensor u00b12u00b0C accuracy Built-in monitoring features Minimum/maximum recorder for each channel Programmable alert thresholds Programmable hysteresis Four 12-bit monotonic 15 V DACs 5 V span, 0 V to 10 V offset 8 u03bcs settling time 10 mA sink and source capability Power-on resets (POR) to 0 V Internal 2.5 V reference 2-wire fast mode I2C interface Temperature range: u221240u00b0C to +105u00b0C Package type: 64-lead TQFP or 56-lead LFCSP
|Input Channel Type||Differential Single Ended|
|Data Interface||2 Wire I2C Serial|
|Supply Voltage Type||-|
|Supply Voltage Min||4.5V|
|Supply Voltage Max||59.4V|
|ADC / DAC Case Style||TQFP|
|No. of Pins||64Pins|
|Operating Temperature Min||-40°C|
|Operating Temperature Max||105°C|
|Automotive Qualification Standard||-|
|RoHS Phthalates Compliant||Yes|
|MSL||MSL 3 - 168 hours|
|SVHC||No SVHC (07-Jul-2017)|
|A/D / D/A Features||A/D & D/A|
|IC Case Style||TQFP|
|Linearity Error ADC / DAC +||1LSB|
|Linearity Error ADC / DAC -||1LSB|
|No. of Bits||12bit|
|No. of Channels||9Channels|
|No. of Inputs||9|
|Operating Temperature Range||-40°C to +105°C|
|Supply Voltage Range - Analogue||4.5V to 5.5V 4.5V to 16.5V|
|Supply Voltage Range - Digital||2.7V to 5.5V 4.5V to 5.5V|
|Termination Type||Surface Mount Device|
Alternative Part Descriptions
- CONVERTER - ADC | Richardson RFPD
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Yes. This part has been flagged as RoHS Compliant by Farnell.
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