DAC8562

Part: DAC7562, DAC7563, DAC8162, DAC8163, DAC8562, DAC8563 — Texas Instruments

Type: Dual Voltage-Output Digital-to-Analog Converter (DAC)

Description: Low-power, dual-channel, 16-, 14-, and 12-bit digital-to-analog converters with a 2.5-V, 4-ppm/°C internal reference, 2.7 V to 5.5 V supply range, and 50-MHz SPI interface.

Operating Conditions:

• Supply voltage: 2.7 V to 5.5 V
• Operating temperature: -40°C to 125°C
• SPI clock rate: up to 50 MHz

Absolute Maximum Ratings:

Key Specs:

• Relative Accuracy (DAC756x): 0.3 LSB INL
• Relative Accuracy (DAC816x): 1 LSB INL
• Relative Accuracy (DAC856x): 4 LSB INL
• Glitch Impulse: 0.1 nV-s
• Internal Reference Initial Accuracy: ±5 mV (Max)
• Internal Reference Temperature Drift: 4 ppm/°C (Typ), 10 ppm/°C (Max)
• Internal Reference Sink/Source Capability: 20 mA
• Power Consumption: 4 mW (Typ, 5-V AVDD, including internal reference current)
• Power-down Current: 550 nA (Typ, 5 V)

Features:

• Bidirectional Reference: Input or 2.5-V Output
• Power-On Reset to Zero Scale or Mid-Scale
• 50-MHz SPI With Schmitt-Triggered Inputs
• LDAC and CLR Functions
• Output Buffer With Rail-to-Rail Operation

Applications:

• Portable Instrumentation
• PLC Analog Output Module
• Closed-Loop Servo Control
• Voltage Controlled Oscillator Tuning
• Data Acquisition Systems
• Programmable Gain and Offset Adjustment

Package:

• WSON-10 (3 mm × 3 mm)
• VSSOP-10

• 1 · Relative Accuracy:
• -DAC756x (12-Bit): 0.3 LSB INL
• -DAC816x (14-Bit): 1 LSB INL
• -DAC856x (16-Bit): 4 LSB INL
• Glitch Impulse: 0.1 nV-s
• Bidirectional Reference: Input or 2.5-V Output
• -Output Disabled by Default
• -±5-mV Initial Accuracy (Max)
• -4-ppm°C Temperature Drift (Typ)
• -10-ppm/°C Temperature Drift (Max)
• -20-mA Sink and Source Capability
• Power-On Reset to Zero Scale or Mid-Scale
• Low-Power: 4 mW (Typ, 5-V AVDD, Including Internal Reference Current)
• Wide Power-Supply Range: 2.7 V to 5.5 V
• 50-MHz SPI With Schmitt-Triggered Inputs
• LDAC and CLR Functions
• Output Buffer With Rail-to-Rail Operation
• Packages: WSON-10 (3 mm × 3 mm), VSSOP-10
• Temperature Range: -40°C to 125°C

• Portable Instrumentation
• PLC Analog Output Module
• Closed-Loop Servo Control
• Voltage Controlled Oscillator Tuning
• Data Acquisition Systems
• Programmable Gain and Offset Adjustment

• (1) TI recommends connecting the thermal pad to the ground plane for better thermal dissipation.

At AVDD = 2.7 V to 5.5 V and TA = -40°C to 125°C (unless otherwise noted).

Over operating ambient temperature range (unless otherwise noted).

over operating ambient temperature range (unless otherwise noted)

When configured for current mode, the XTR300 routes the internal output of its current copy circuitry to the SET pin. This provides feedback for the internal OPA driver based on 1 / 10th of the output current, resulting in a voltage-to-current transfer function. Generating bipolar current outputs from the single-ended DAC output voltage, VDAC, requires the application of an offset to the XTR300 SET pin. Connect the RSET resistor from the SET pin to VREF to apply the offset and obtain the transfer function shown in Equation 6.

The desired output ranges for VDAC and VREF voltages determine the RSET and RG resistor values, calculated using Equation 7 and Equation 8. The system design requires a VDAC voltage range of 0.04 V to 4.96 V in order to operate the DAC8563 in the specified linear output range from codes 512 to 65 024.

IMON and IAOUT accomplish load monitoring. The sizing of RIMON and RIA determine the monitoring output voltage across the resistors. Size the resistors according to Equation 9 and Equation 10 and the expected output load current IDRV.

For more detailed information about the design procedure of this circuit and how to isolate it, see Two-Channel Source/Sink Combined Voltage & Current Output, Isolated, EMC/EMI Tested Reference Design (TIDU434).