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Known Good Die
SPI-/I2C-Compatible Temperature Sensor with 4-Channel ADC and Quad Voltage Output
ADT7517-KGD
FEATURES
GENERAL DESCRIPTION
Four 10-bit DACs Buffered voltage output Guaranteed monotonic by design over all codes 10-bit temperature-to-digital converter 10-bit, 4-channel ADC DC input bandwidth Input range: 0 V to 2.28 V Temperature range: −40°C to +120°C Temperature sensor accuracy: ±3°C typical Supply range: 2.7 V to 5.5 V DAC output range: 0 V to VDD
The ADT7517-KGD combines a 10-bit temperature-to-digital converter, a 10-bit, 4-channel ADC, and a quad 10-bit DAC in die form. The ADT7517-KGD also includes a band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C.
The ADT7517-KGD operates from a single 2.7 V to 5.5 V supply. The input voltage range on the ADC channels is 0 V to 2.28 V, and the input bandwidth is dc. The reference for the ADC channels is derived internally. The output voltage of the DAC ranges from 0 V to VDD, with an output voltage settling time of 7 μs typical.
Power-down current: <10 μA
The ADT7517-KGD provides two serial interface options: a 4-wire
Internal 2.28 VREF option Double-buffered input logic
serial interface that is compatible with SPI, QSPI™, MICROWIRE®, and DSP interface standards, and a 2-wire SMBus/I2C interface.
Buffered reference input
The ADT7517-KGD features a standby mode that is controlled
Power-on reset to 0 V DAC output
through the serial interface.
Simultaneous update of outputs (LDAC function) On-chip, rail-to-rail output buffer amplifier Compatible with SPI, I2C, QSPI, MICROWIRE, and DSP Support for SMBus packet error checking (PEC) Known good die (KGD): a die that is tested and guaranteed
over the full specifications of the data sheet
APPLICATIONS
Process control Smart battery chargers
The reference for the four DACs is derived either internally or from a reference pad. The outputs of all DACs can be updated simultaneously using the software LDAC function or the external LDAC pad. The ADT7517-KGD incorporates a power-on reset circuit, ensuring that the DAC output powers up to 0 V and remains at 0 V until a valid write takes place.
Additional application and technical information can be found in the ADT7517 data sheet.
Portable equipment
FUNCTIONAL BLOCK DIAGRAM
D+/AIN1 D–/AIN2 LDAC/AIN3
AIN4
ON-CHIP TEMPERATURE
SENSOR
INTERNAL TEMPERATURE VALUE REGISTER
EXTERNAL TEMPERATURE VALUE REGISTER
ANALOG MUX
VDD SENSOR
ADC
VDD VALUE REGISTER
AIN1 VALUE REGISTER
AIN2 VALUE REGISTER
AIN3 VALUE REGISTER
AIN4 VALUE REGISTER
LIMIT COMPARATOR
STATUS REGISTERS
ADDRESS POINTER REGISTER
THIGH LIMIT REGISTERS TLOW LIMIT REGISTERS
VDD LIMIT REGISTERS
AINHIGH LIMIT REGISTERS AINLOW LIMIT REGISTERS
CONTROL CONFIG. 1 REGISTER
CONTROL CONFIG. 2 REGISTER
CONTROL CONFIG. 3 REGISTER
DAC CONFIGURATION REGISTERS
LDAC CONFIGURATION REGISTERS
INTERRUPT MASK REGISTERS
SPI/SMBus INTERFACE
ADT7517-KGD
DAC A
STRING
REGISTERS DAC A
DAC B
STRING
REGISTERS DAC B
DAC C
STRING
REGISTERS DAC C
DAC D
STRING
REGISTERS DAC D
GAIN SELECT LOGIC
POWERDOWN LOGIC
VOUT-A VOUT-B VOUT-C VOUT-D
INT/INT
INTERNAL REFERENCE
DIGITAL MUX DIGITAL MUX
10686-001
VDD
GND
CS SCL/SCLK SDA/DIN DOUT/ADD
Figure 1.
LDAC/AIN3 VREF-IN
Rev. A
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ADT7517-KGD
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3
DAC AC Characteristics.............................................................. 6
REVISION HISTORY
10/14—Rev. 0 to Rev. A Change to Bond Pad Composition Value, Table 6 ..................... 11
8/13—Revision 0: Initial Version
Known Good Die
Timing Diagrams ..........................................................................7 Absolute Maximum Ratings .......................................