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MAX503CWGMAXIMN/a28avai5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC
MAX503EAGMaxim N/a58avai5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC
MAX503EWGMAXIMN/a106avai5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC
MAX503CAGMaxim N/a28avai5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC
MAX503CNGMAIXMN/a1500avai5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC


MAX503CNG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACapplications. In addition, the shrink small-40µA Shutdown-Mode Currentoutline package (SSOP) measur ..
MAX503CNG+ ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACApplicationsMAX503CNG 0°C to +70°C 24 Narrow Plastic DIPBattery-Powered Data-Conversion ProductsMAX ..
MAX503CWG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACApplicationsMAX503CNG 0°C to +70°C 24 Narrow Plastic DIPBattery-Powered Data-Conversion ProductsMAX ..
MAX503CWG+ ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACELECTRICAL CHARACTERISTICS—Single +5V Supply(V = 5V, V = 0V, AGND = DGND = REFGND = 0V, REFIN = 2.0 ..
MAX503EAG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACELECTRICAL CHARACTERISTICS—Single +5V Supply(V = 5V, V = 0V, AGND = DGND = REFGND = 0V, REFIN = 2.0 ..
MAX503EAG+ ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACapplications. In addition, the shrink small-40μA Shutdown-Mode Currentoutline package (SSOP) measur ..
MAX922CUA ,Ultra Low-Power, Single/Dual-Supply ComparatorsELECTRICAL CHARACTERISTICS: 5V OPERATION(V+ = 5V, V- = GND = 0V, T = T to T , unless otherwise note ..
MAX922CUA+T ,Ultra Low-Power, Single/Dual-Supply ComparatorsGeneral Description ________
MAX922EPA ,Ultra Low-Power, Single/Dual-Supply Comparatorsapplications, theDual ±1.25V to ±5.5VMAX921–MAX924 operate from a single +2.5V to +11V' Input Volta ..
MAX922ESA ,Ultra Low-Power, Single/Dual-Supply ComparatorsFeaturesThe MAX921–MAX924 single, dual, and quad micro-' µMAX Package—Smallest 8-Pin SOpower, low-v ..
MAX922ESA ,Ultra Low-Power, Single/Dual-Supply ComparatorsELECTRICAL CHARACTERISTICS: 5V OPERATION (continued)(V+ = 5V, V- = GND = 0V, T = T to T , unless ot ..
MAX922ESA+T ,Ultra Low-Power, Single/Dual-Supply ComparatorsGeneral Description ________


MAX503CAG-MAX503CNG-MAX503CWG-MAX503EAG-MAX503EWG
5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DAC
_______________General Description
The MAX503 is a low-power, 10-bit, voltage-output digital-
to-analog converter (DAC) that uses single 5V or dual ±5V
supplies. This device has an internal voltage reference plus
an output buffer amplifier. Operating current is only 250µA
from a single 5V supply, making it ideal for portable and
battery-powered applications. In addition, the shrink small-
outline package (SSOP) measures only 0.1 square inches,
using less board area than an 8-pin DIP. 10-bit resolution is
achieved through laser trimming of the DAC, op amp, and
reference. No further adjustments are necessary.
Internal gain-setting resistors can be used to define a DAC
output voltage range of 0V to +2.048V, 0V to +4.096V, or
±2.048V. Four-quadrant multiplication is possible without
the use of external resistors or op amps. The parallel logic
inputs are double buffered and are compatible with 4-bit, 8-
bit, and 16-bit microprocessors. For a hardware and soft-
ware compatible 12-bit upgrade, refer to the MAX530 data
sheet. For DACs with similar features but with a serial data
interface, refer to the MAX504/MAX515 data sheet.
________________________Applications

Battery-Powered Data-Conversion Products
Minimum Component-Count Analog Systems
Digital Offset/Gain Adjustment
Industrial Process Control
Arbitrary Function Generators
Automatic Test Equipment
Microprocessor-Controlled Calibration
____________________________Features
Buffered Voltage OutputInternal 2.048V Voltage ReferenceOperates from Single 5V or Dual ±5V SuppliesLow Power Consumption:
250µA Operating Current
40µA Shutdown-Mode Current
SSOP Package Saves SpaceRelative Accuracy: ±1/2LSB Max Over
Temperature
Guaranteed Monotonic Over Temperature4-Quadrant Multiplication with No External
Components
Power-On ResetDouble-Buffered Parallel Logic Inputs
______________Ordering Information
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
________________Functional Diagram
Call toll free 1-800-998-8800 for free samples or literature.

19-0279; Rev 0; 8/94
Refer to the MAX530 for military temperature or die equivalents.
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS

VDDto DGND and VDDto AGND................................-0.3V, +6V
VSSto DGND and VSSto AGND.................................-6V, +0.3V
VDDto VSS...............................................................-0.3V, +12V
AGND to DGND........................................................-0.3V, +0.3V
REFGND to AGND.........................................-0.3V, (VDD+ 0.3V)
Digital Input Voltage to DGND ....................-0.3V, (VDD+ 0.3V)
REFIN..................................................(VSS- 0.3V), (VDD+ 0.3V)
REFOUT..............................................(VSS- 0.3V), (VDD+ 0.3V)
REFOUT to REFGND....................................-0.3V, (VDD+ 0.3V)
RFB ....................................................(VSS- 0.3V), (VDD+ 0.3V)
ROFS ..................................................(VSS- 0.3V), (VDD+ 0.3V)
VOUT to AGND (Note 1) ..............................................VSS,VDD
Continuous Current, Any Input ........................................±20mA
Continuous Power Dissipation (TA= +70°C)
Narrow Plastic DIP (derate 13.33mW/°C above +70°C)...1067mW
Wide SO (derate 11.76mW/°C above +70°C)...............941mW
SSOP (derate 8.00mW/°C above +70°C)......................640mW
Operating Temperature Ranges
MAX503C_G.........................................................0°C to +70°C
MAX503E_G......................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec) ...........................+300°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.
Note 1:
The output may be shorted to VDD, VSS, DGND, or AGND if the continuous package power dissipation and current ratings
are not exceeded. Typical short-circuit currents are 20mA.
ELECTRICAL CHARACTERISTICS—Single +5V Supply

(VDD= 5V, VSS= 0V, AGND = DGND = REFGND = 0V, REFIN = 2.048V (external), RFB = ROFS = VOUT, CREFOUT= 33µF,= 10kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise noted.)
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)

(VDD= 5V, VSS= 0V, AGND = DGND = REFGND = 0V, REFIN = 2.048V (external), RFB = ROFS = VOUT, CREFOUT= 33µF, = 10kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies
(VDD= 5V, VSS= -5V, AGND = DGND = REFGND = 0V, REFIN = 2.048V (external), RFB = ROFS = VOUT, CREFOUT= 33µF, = 10kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise noted.)
Note 2:
In single supply, INL and GE are calculated from code 3 to code 1023 (code excludes S0 and S1).
Note 3:
Guaranteed by design.
Note 4:
REFIN = 1kHz, 2.0Vp-p.
Note 5:
Tested at IOUT= 100µA. The reference can typically source up to 5mA (see Typical Operating Characteristics).
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC_______________________________________________________________________________________
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC
_______________________________________________________________________________________5
0.8
OUTPUT SINK CAPABILITY vs.
OUTPUT PULL-DOWN VOLTAGE

MAX503-1
OUTPUT PULL-DOWN VOLTAGE (V)
OUTPUT SINK CAPABILITY (mA)
OUTPUT SOURCE CAPABILITY vs.
OUTPUT PULL-UP VOLTAGE
MAX503-2
OUTPUT PULL-UP VOLTAGE (V)
OUTPUT SOURCE CAPABILITY (mA)
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (100
MAX503-5
-14100100k
GAIN vs. FREQUENCY

MAX503-6
FREQUENCY (Hz)
GAIN (dB)
-1010k
__________________________________________Typical Operating Characteristics

(Single +5V supply, unity gain, code = all 1s, TA = +25°C, unless otherwise noted.)
-110101k100k
ANALOG FEEDTHROUGH vs.
FREQUENCY

MAX503-3
FREQUENCY (Hz)
ANALOG FEEDTHROUGH (dB)
10010k1M
REFERENCE VOLTAGE vs.
TEMPERATURE
MAX503-4
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
-202080100400-401401k100k
AMPLIFIER SIGNAL-TO-NOISE RATIO

MAX503-7
FREQUENCY (Hz)
SIGNAL-TO-NOISE RATIO (dB)
10k100
GAIN AND PHASE vs.
FREQUENCY
FREQUENCY (kHz)
GAIN (dB)100
PHASE SHIFT (Degrees)
MAX503-8
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC_______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)

(Single +5V supply, unity gain, code = all 1s, TA = +25°C, unless otherwise noted.)
A: DIGITAL INPUTS RISING EDGE,
B: VOUT, NO LOAD, 1V/div
DUAL SUPPLY (±5V)
LDAC = LOW
BIPOLAR CONFIGURATION
VREFIN = 2V
SETTLING TIME (RISING)

5μs/div
REFERENCE OUTPUT VOLTAGE
vs. REFERENCE LOAD CURRENT
MAX503-10
REFERENCE LOAD CURRENT (mA)
REFERENCE OUTPUT (V)
A: DIGITAL INPUTS FALLING EDGE, 5V/div
B: VOUT, NO LOAD, 1V/div
DUAL SUPPLY (±5V)
LDAC = LOW
BIPOLAR CONFIGURATION
VREFIN = 2V
SETTLING TIME (FALLING)

5µs/div500
SUPPLY CURRENT vs. REFIN

REFIN (mV)
SUPPLY CURRENT (
MAX503-9
MAX503, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC
_______________________________________________________________________________________7
______________________________________________________________Pin Description

* This applies to 4 + 4 + 4 input loading mode. See Table 2 for 8 + 4 input loading mode.
MAX503
________________Detailed Description

The MAX503 consists of a parallel-input logic interface, a
10-bit R-2R ladder, a reference, and an op amp. The
Functional Diagramshows the control lines and signal
flow through the input data latch to the DAC latch, as well
as the 2.048V reference and output op amp. Total supply
current is typically 250µA with a single +5V supply. This
circuit is ideal for battery-powered, microprocessor-con-
trolled applications where high accuracy, no adjustments,
and minimum component count are key requirements.
R-2R Ladder

The MAX503 uses an “inverted” R-2R ladder network with
a BiCMOS op amp to convert 10-bit digital data to analog
voltage levels. Figure 1 shows a simplified diagram of the
R-2R DAC and op amp. Unlike a standard DAC, the
MAX503 uses an “inverted” ladder network. Normally, the
REFIN pin is the current output of a standard DAC and
would be connected to the summing junction, or virtual
ground, of an op amp. In this standard DAC configura-
tion, however, the output voltage would be the inverse of, Low-Power, Parallel-Input,
Voltage-Output, 10-Bit DAC_______________________________________________________________________________________

Figure 1. Simplified MAX503 DAC Circuit
the reference voltage. The MAX503’s topology makes the
ladder output voltage the same polarity as the reference
input, making the device suitable for single-supply oper-
ation. The BiCMOS op amp is then used to buffer, invert,
or amplify the ladder signal.
Ladder resistors are nominally 80kΩto conserve power
and are laser trimmed for gain and linearity. The input
impedance at REFIN is code dependent. When the DAC
register is all 0s, all rungs of the ladder are grounded
and REFIN is open or no load. Maximum loading (mini-
mum REFIN impedance) occurs at code 010101....
Minimum reference input impedance at this code is guar-
anteed to be not less than 40kΩ.
The REFIN and REFOUT pins allow the user to choose
between driving the R-2R ladder with the on-chip refer-
ence or an external reference. REFIN may be below ana-
log ground when using dual supplies. See the External
Reference andFour-Quadrant Multiplicationsections for
more information.
Internal Reference

The on-chip reference is laser trimmed to generate
2.048V at REFOUT. The output stage can source and
sink current so REFOUT can settle to the correct volt-
age quickly in response to code-dependent loading
changes. Typically, source current is 5mA and sink
current is 100µA.
REFOUT connects the internal reference to the R-2R
DAC ladder at REFIN. The R-2R ladder draws 50µA
maximum load current. If any other connection is made
to REFOUT, ensure that the total load current is less
than 100µA to avoid gain errors.
A separate REFGND pin is provided to isolate refer-
ence currents from other analog and digital ground
currents. To achieve specified noise performance, con-
nect a 33µF capacitor from REFOUT to REFGND (see
Figure 2). Using smaller capacitance values increases
noise, and values less than 3.3µF may compromise the
reference’s stability. For applications requiring the low-
est noise, insert a buffered RC filter between REFOUT
and REFIN. When using the internal reference,
REFGND must be connected to AGND. In applications
not requiring the internal reference, connect REFGND
to VDD, which shuts down the reference. This saves
typically 100µA of VDDsupply current and eliminates
the need for CREFOUT.
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