19-3586; Rev 0; 2/05
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial
Interface
General Description
Features
♦ Nonvolatile Registers Initialize DACs to Stored
The MAX5115/MAX5116 quad, 8-bit, digital-to-analog
converters (DACs) feature nonvolatile registers. These
nonvolatile registers store the DAC operating modes
and output states, allowing the DACs to initialize to
specified configurations at power-up.
States
♦ +2.7V to +5.25V Single-Supply Operation
♦ Quad 8-Bit DACs with Independent High and Low
Reference Inputs
Precision on-chip output buffers swing rail-to-rail, and
provide 8µs settling time. The I2C-compatible, 2-wire
serial interface allows for a maximum clock frequency
of 400kHz.
♦ Rail-to-Rail Output Buffers
♦ Low 200µA per DAC Supply Current
♦ Power-Down Mode Reduces Supply Current to
25µA (max)
The MAX5115 has independent high and low reference
inputs allowing maximum output voltage range flexibili-
ty. The MAX5116 has single high and low reference
inputs for all DACs to minimize trace count and save
board space. The reference rails accept voltage inputs
that range from ground to the positive supply rail.
♦ 400kHz, I2C-Compatible, 2-Wire Serial Interface
♦ Asynchronous MUTE Input (MAX5116)
♦ Small 16-/20-Pin QSOP Packages
Ordering Information
The devices operate from a single +2.7V to +5.25V sup-
ply and consume 200µA per DAC. A software-controlled
power-down mode decreases supply current to less
than 25µA. A software-controlled mute mode sets each
DAC, or both DACs simultaneously, to their respective
REFL_ voltages. The MAX5116 also includes an asyn-
chronous MUTE input, that drives all DAC outputs simul-
taneously to their respective REFL_ voltages.
PIN-
PACKAGE
REFERENCE
INPUTS
PART
TEMP RANGE
20 QSOP
16 QSOP
MAX5115EEP -40°C to +85°C
MAX5116EEE -40°C to +85°C
4
1
Simplified Diagram
V
REFH
DD
The MAX5115 is available in a 20-pin QSOP, and the
MAX5116 is available in a 16-pin QSOP package. Both
devices are specified for operation over the extended
(-40°C to +85°C) temperature range.
DAC0
MAX5116
NONVOLATILE/
VOLATILE
DAC0
OUT0
REGISTERS
Applications
DAC1
Digital Gain and Offset Adjustments
Programmable Attenuators
Portable Instruments
NONVOLATILE/
VOLATILE
REGISTERS
DAC1
DAC2
OUT1
OUT2
SCL
SDA
2-WIRE
SERIAL
INTERFACE/
CONTROL
A3
A2
DAC2
NONVOLATILE/
VOLATILE
Power-Amp Bias Control
ATE Calibration
A1
A0
REGISTERS
MUTE
Laser Biasing
DAC3
NONVOLATILE/
VOLATILE
REGISTERS
DAC3
REFL
OUT3
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
GND
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.