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MAX5823 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5823 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 35 page MAX5823/MAX5824/MAX5825 Ultra-Small, Octal Channel, 8-/10-/12-Bit Buffered Output DACs with Internal Reference and I2C Interface General Description The MAX5823/MAX5824/MAX5825 8-channel, low-power, 8-/10-/12-bit, voltage-output digital-to-analog converters (DACs) include output buffers and an internal 3ppm/°C reference that is selectable to be 2.048V, 2.500V, or 4.096V. The MAX5823/MAX5824/MAX5825 accept a wide supply voltage range of 2.7V to 5.5V with extremely low power (6mW) consumption to accommodate most low-voltage applications. A precision external reference input allows rail-to-rail operation and presents a 100kI (typ) load to an external reference. The MAX5823/MAX5824/MAX5825 have an I2C-compatible, 2-wire interface that operates at clock rates up to 400kHz. The DAC output is buffered and has a low sup- ply current of less than 250FA per channel and a low offset error of Q0.5mV (typ). On power-up, the MAX5823/ MAX5824/MAX5825 reset the DAC outputs to zero or mid- scale based on the status of M/Z logic input, providing flexibility for a variety of control applications. The internal reference is initially powered down to allow use of an external reference. The MAX5823/MAX5824/MAX5825 allow simultaneous output updates using software LOAD commands or the hardware load DAC logic input (LDAC). The MAX5823/MAX5824/MAX5825 feature a watchdog function which can be enabled to monitor the I/O inter- face for activity and integrity. A clear logic input (CLR) allows the contents of the CODE and the DAC registers to be cleared asynchronously and simultaneously sets the DAC outputs to the program- mable default value. The MAX5823/MAX5824/MAX5825 are available in a 20-pin TSSOP and an ultra-small, 20-bump WLP package and are specified over the -40NC to +125NC temperature range. Applications Programmable Voltage and Current Sources Gain and Offset Adjustment Automatic Tuning and Optical Control Power Amplifier Control and Biasing Process Control and Servo Loops Portable Instrumentation Benefits and Features S Eight High-Accuracy DAC Channels 12-Bit Accuracy Without Adjustment ±1 LSB INL Buffered Voltage Output Guaranteed Monotonic Over All Operating Conditions Independent Mode Settings for Each DAC S Three Precision Selectable Internal References 2.048V, 2.500V, or 4.096V S Internal Output Buffer Rail-to-Rail Operation with External Reference 4.5µs Settling Time Outputs Directly Drive 2kI Loads S Small 6.5mm x 4.4mm 20-Pin TSSOP or Ultra- Small 2.5mm x 2.3mm 20-Bump WLP Package S Wide 2.7V to 5.5V Supply Range S Separate 1.8V to 5.5V VDDIO Power-Supply Input S Fast 400kHz I2C-Compatible, 2-Wire Serial Interface S Pin-Selectable Power-On-Reset to Zero-Scale or Midscale DAC Output S LDAC and CLR For Asynchronous DAC Control S Three Software-Selectable Power-Down Output Impedances 1kI, 100kI, or High Impedance 19-6185; Rev 2; 2/13 Ordering Information appears at end of data sheet. Functional Diagram EVALUATION KIT AVAILABLE ADDR0 SDA SCL OUT0 BUFFER POR WATCHDOG TIMER VDD GND DAC CONTROL LOGIC POWER-DOWN REF OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 VDDIO ADDR1 CLR LDAC IRQ M/Z I2C SERIAL INTERFACE 1kI 100kI CODE LOAD CLEAR/ RESET (GATE/ CLEAR/ RESET) CODE REGISTER DAC LATCH 8-/10-/12-BIT DAC 1 OF 8 DAC CHANNELS INTERNAL REFERENCE/ EXTERNAL BUFFER MAX5823 MAX5824 MAX5825 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX5823.related |
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