MAX5122BEEE ,+5V/+3V, 12-Bit, Serial, Force/Sense DACs with 10ppm/∑C Internal ReferenceELECTRICAL CHARACTERISTICS—MAX5122 (+5V)(V = +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, inter ..
MAX5122BEEE ,+5V/+3V, 12-Bit, Serial, Force/Sense DACs with 10ppm/∑C Internal Referenceapplications. Bothdevices draw only 500µA of supply current, which' Buffered Output Capable of Driv ..
MAX5123AEEE ,+5V/+3V / 12-Bit / Serial / Force/Sense DACs with 10ppm/C Internal ReferenceFeaturesThe MAX5122/MAX5123 low-power, 12-bit, voltage-out-' Single-Supply Operationput, digital-to ..
MAX5123BEEE ,+5V/+3V / 12-Bit / Serial / Force/Sense DACs with 10ppm/C Internal ReferenceELECTRICAL CHARACTERISTICS—MAX5122 (+5V)(V = +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, inter ..
MAX512CPD ,Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial InterfaceGeneral Description ________
MAX512CSD ,Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial InterfaceFeaturesThe MAX512/MAX513 contain three 8-bit, voltage-output' Operate from a Single +5V (MAX512) o ..
MAX9526ATJ , Low-Power, High-Performance NTSC/PAL Video Decoder
MAX952EPA ,Ultra-Low-Power, Single-Supply Op Amp Comparator ReferenceMAX951–MAX95419-0431; Rev 1; 7/97Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference____ ..
MAX952ESA ,Ultra-Low-Power, Single-Supply Op Amp Comparator ReferenceMAX951–MAX95419-0431; Rev 1; 7/97Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference____ ..
MAX952EUA ,Ultra-Low-Power, Single-Supply Op Amp Comparator ReferenceFeaturesThe MAX951–MAX954 feature combinations of a' Op Amp + Comparator + Reference in an 8-Pinmic ..
MAX952EUA ,Ultra-Low-Power, Single-Supply Op Amp Comparator ReferenceFeaturesThe MAX951–MAX954 feature combinations of a' Op Amp + Comparator + Reference in an 8-Pinmic ..
MAX952EUA+ ,Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceELECTRICAL CHARACTERISTICS(V = 2.8V to 7V for MAX951/MAX952, V = 2.4V to 7V for MAX953/MAX954, V = ..
MAX5122AEEE-MAX5122BEEE
+5V/+3V, 12-Bit, Serial, Force/Sense DACs with 10ppm/∑C Internal Reference
General DescriptionThe MAX5122/MAX5123 low-power, 12-bit, voltage-out-
put, digital-to-analog converters (DACs) feature an inter-
nal precision bandgap reference and output amplifier.
The MAX5122 operates on a single +5V supply with an
internal +2.5V reference, and offers a configurable output
amplifier. If necessary, the user can override the on-chip,
<10ppm/°C voltage reference with an external reference.
The MAX5123 has the same features as the MAX5122 but
operates from a single +3V supply and has an internal
+1.25V precision reference. The user-accessible inverting
input and output of the amplifier allows specific gain con-
figurations, remote sensing, and high output drive capa-
bility for a wide range of force/sense applications. 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 midscale and reduces output
glitches during power-up.
The serial interface is compatible with SPI™, QSPI™, and
MICROWIRE™, which makes the MAX5122/MAX5123
suitable for cascading multiple devices. Each DAC has
a double-buffered input organized as an input register
followed by a DACregister. A 16-bit shift register loads
data into the input register. The DAC register may be
updated independently or simultaneously with the input
register.
Both devices are available in a 16-pin QSOP package
and are specified for the extended-industrial (-40°C to
+85°C) operating temperature range. For pin-compatible
14-bit upgrades, see the MAX5171/MAX5173 data sheet;
for the pin-compatible 13-bit version, see the MAX5132/
MAX5133 data sheet.
ApplicationsIndustrial Process Control
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
Microprocessor-Controlled Systems
FeaturesSingle-Supply Operation
+5V (MAX5122)
+3V (MAX5123)Built-In 10ppm/°C max Precision Bandgap Reference
+2.5V (MAX5122)
+1.25V (MAX5123)SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial
InterfacePin-Programmable Shutdown Mode and Power-
Up Reset (0 or Midscale Output Voltage)Buffered Output Capable of Driving 5kΩ100pF
or 4–20mA LoadsSpace-Saving 16-Pin QSOP PackagePin-Compatible 13-Bit Upgrades Available
(MAX5132/MAX5133)Pin-Compatible 14-Bit Upgrades Available
(MAX5171/MAX5173)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference19-1446; Rev 0; 3/99
Pin Configuration
Ordering InformationSPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX5122 (+5V)(VDD= +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier configured
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDto 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)
FB, OUT to AGND......................................-0.3V 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°C
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
ELECTRICAL CHARACTERISTICS—MAX5122 (+5V) (continued)(VDD= +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier configured
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
ELECTRICAL CHARACTERISTICS—MAX5123 (+3V)(VDD= +3V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier connected
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
ELECTRICAL CHARACTERISTICS—MAX5123 (+3V) (continued)(VDD= +3V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier connected
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS—MAX5122 (+5V)(VDD= +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier connected
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
Note 1:Accuracy is guaranteed by the following table:
Note 2:Offset is measured at the code closest to 10mV.
Note 2:The temperature coefficient is determined by the “box” method, in which the maximum DVOUTover the temperature range
is divided by DT and the typical reference voltage.
Note 4:Accuracy is better than 1.0LSB for VOUT= 10mV to (VDD- 180mV). Guaranteed by PSR test on end points.
Note 5:RLOAD= ¥and digital inputs are at either VDDor DGND.
TIMING CHARACTERISTICS—MAX5123 (+3V)(VDD= +3V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL= 5kΩ, CL= 100pF, output amplifier connected
in unity-gain, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
Typical Operating Characteristics(VDD= +5V, RL= 5kΩ, CL= 100pF, output amplifier in unity-gain configuration, TA= +25°C, unless otherwise noted.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Referenceypical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, CL= 100pF, output amplifier in unity-gain configuration, TA= +25°C, unless otherwise noted.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Referenceypical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, CL= 100pF, output amplifier in unity-gain configuration, TA= +25°C, unless otherwise noted.)
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
Pin Description
MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
_______________Detailed DescriptionThe MAX5122/MAX5123 12-bit, force/sense DACs are
easily configured with a 3-wire serial interface. They
include a 16-bit data-in/data-out shift register and have
a double-buffered digital input consisting of an input
register and a DAC register. In addition, these devices
employ precision bandgap references, as well as an
output amplifier with accessible feedback and output
pins that can be used to set the gain externally (Figure
1) or for forcing and sensing applications. These DACs
are designed with an inverted R-2R ladder network
(Figure 2) that produces a weighted voltage proportion-
al to the digital input code.
Internal ReferenceBoth devices use an on-board precision bandgap ref-
erence with a low temperature coefficient of only
10ppm/°C (max) to generate an output voltage of +2.5V
(MAX5122) or +1.25V (MAX5123). The REF pin can
source up to 100µA and may become unstable with
capacitive loads exceeding 100pF. REFADJ can be
used for minor adjustments to the reference voltage.
Figure 1. Simplified Functional Diagram
