AD5390BSTZ-5 Analog Devices Inc, AD5390BSTZ-5 Datasheet - Page 33

• Manufacturer Part Number: AD5390BSTZ-5
• Description: IC DAC 14BIT I2C 16CH 52-LQFP
• Manufacturer: Analog Devices Inc

Specifications of AD5390BSTZ-5

• Data Interface: I²C, Serial
• Design Resources: 8 to 16 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5390/1/2 (CN0029) AD5390/91/92 Channel Monitor Function (CN0030)
• Settling Time: 8µs
• Number Of Bits: 14
• Number Of Converters: 16
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 35mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 52-LQFP
• Resolution (bits): 14bit
• Sampling Rate: 125kSPS
• Input Channel Type: Serial
• Supply Voltage Range - Analogue: 4.5V To 5.5V
• Supply Voltage Range - Digital: 2.7V To 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD5390EBZ - BOARD EVALUATION FOR AD5390
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

CONTROL REGISTER WRITE
Table 25 shows the control register contents for the AD5390 and the AD5392. Table 26 provides bit descriptions. Note that
REG1 = REG0 = 0, A3–A0 = 1100, and DB13–DB0 contain the control register data.
Table 25. AD5390/AD5392 Control Register Contents
MSB
CR13
Table 26. AD5390 and AD5392 Bit Descriptions
Bit
CR13
CR12
CR11
CR10
CR9
CR8
CR7 to CR4
CR3 to CR2
CR1 and CR0
CR12
Description
Power-Down Status. This bit is used to configure the output amplifier state in power–down mode.
CR13 = 1: Amplifier output is high impedance (default on power-up).
CR13 = 0: Amplifier output is 100 kΩ to ground.
REF Select. This bit selects the operating internal reference for the AD539x. CR12 is programmed as follows:
CR12 = 1: Internal reference is 2.5 V (AD5390/AD5392-5 default). Recommended operating reference for AD539x-5.
CR12 = 0: Internal reference is 1.25 V (AD5390/AD5392-3 default). Recommended operating reference for AD5390-3 and
AD5392-3.
Current Boost Control. This bit is used to boost the current in the output amplifier, thus altering its slew rate and is
configured as follows:
CR11 = 1: Boost mode on. This maximizes the bias current in the output amplifier, optimizing its slew rate but increasing
the power dissipation.
CR11 = 0: Boost mode off (default on power-up). This reduces the bias current in the output amplifier and reduces the
overall power consumption.
Internal/External Reference. This bit determines if the DAC uses its internal reference or an external reference.
CR10 = 1: Internal reference enabled. Reference output depends on data loaded to CR12.
CR10 = 0: External reference selected (default on power-up).
Channel Monitor Enable (see Table 23).
CR9 = 1: Monitor enabled. This enables the channel monitor function. Following a write to the monitor channel in the SFR
register, the selected channel output is routed to the MON_OUT pin.
CR9 = 0: Monitor disabled (default on power-up). When monitor is disabled, the MON_OUT pin is three-stated.
Thermal Monitor Function. This function is used to monitor the internal die temperature of the AD5390/AD5392, when
enabled. The thermal monitor powers down the output amplifiers when the temperature exceeds 130°C. This function
can be used to protect the device in cases where the power dissipation of the device may be exceeded, if a number of
output channels are simultaneously short circuited. A soft power-up re-enables the output amplifiers, if the die
temperature has dropped below 130°C.
CR8 = 1: Thermal monitor enabled.
CR8 = 0: Thermal monitor disabled (default on power-up).
Don’t Care.
Toggle Function Enable. This function lets the user toggle the output between two codes loaded to the A and B register
for each DAC. Control Register Bits CR3 and CR2 are used to enable individual groups of eight channels for operation in
toggle mode on the AD5390 and AD5392, as follows:
CR3 Group 1 Channels 8 to 15
CR2 Group 0 Channels 0 to 7
CR2 is the only active bit on the AD5392. Logic 1 written to any bit enables a group of channels, and Logic 0 disables a
group. LDAC is used to toggle between the two registers.
Don’t care.
CR11
CR10
CR9
CR8
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CR7
CR6
CR5
CR4
AD5390/AD5391/AD5392
CR3
CR2
CR1
LSB
CR0