Features: Single-Supply Operation +5V (MAX5120) +3V (MAX5121)
Full-Scale Output Range +4.095V (MAX5120) +2.0475V (MAX5121)
Built-In 10ppm/°C (max) Precision Bandgap Reference +2.5V (MAX5120) +1.25V (MAX5121)
Adjustable Output Offset
SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial Interface
Pin-Programmable Shutdown Mode and Power-Up Reset (0V or Midscale Output Voltage)
Buffered Output Capable of Driving 5kΩ100pF or 420mA Loads
Space-Saving 16-Pin QSOP Package
Pin-Compatible 13-Bit Upgrades Available (MAX5130/MAX5131)
Pin-Compatible 14-Bit Upgrades Available (MAX5170/MAX5172)ApplicationIndustrial Process Controls
Automatic Test Equipment (ATE)
Digital Offset and Gain Adjustment
Motion Control
µP-Controlled SystemsPinout
SpecificationsVDDto AGND, DGND...............................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
Digital Inputs to DGND.............................................-0.3V to +6V
Digital Outputs (DOUT, UPO) to DGND.....-0.3V to (VDD+ 0.3V)
OUT to AGND.............................................-0.3V to (VDD+ 0.3V)
OS to AGND...................................(AGND - 4V) to (VDD+ 0.3V)
REF, REFADJ to AGND..............................-0.3V to (VDD+ 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA= +70°C)
QSOP (derate 8.00mW/°C above +70°C).....................667mW
Operating Temperature Range ..........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°CDescriptionThe MAX5120/MAX5121 are low-power, 12-bit, voltage-output digital-to-analog converters (DACs) with an inter-nal precision bandgap reference and an output amplifier.The MAX5120 operates on a +5V supply with an internal amplifier reference of +2.5V and is capable of a +4.095V full-scale output range. The MAX5121, operating on +3V,delivers its +2.0475V full-scale output with an internal precision reference of +1.25V. If necessary, the user can override the internal, <10ppm/°C voltage reference with an external reference. Both devices draw only 500µA of supply current, which reduces to 3µA in power-down mode. In addition, their power-up reset feature allows for a user-selectable initial output state of either 0V or mid-scale and minimizes output voltage glitches during power-up.
The serial interface is compatible with SPI™, QSPI™and MICROWIRE™, which makes the MAX5120/MAX5121 suitable for cascading multiple devices. Each DAC has a double-buffered input organized as an input register followed by a DAC register. A 16-bit shift regis-ter loads data into the input register. The DAC register may be updated independently or simultaneously with the input register.
Both devices of MAX5121 are available in a 16-pin QSOP package and are specified for the extended industrial (-40°C to+85°C) temperature range. For pin-compatible 14-bit upgrades, see the MAX5170/MAX5172 data sheet; for pin-compatible 13-bit versions, see the MAX5130/MAX5131 data sheet.
MAX5121 Data Sheet
