MAX5250BEAP+ ,Low-Power, Quad, 10-Bit Voltage-Output DAC with Serial InterfaceELECTRICAL CHARACTERISTICS(V = +5V ±10%, AGND = DGND = 0V, REFAB = REFCD = 2.5V, R = 5kΩ , C = 100p ..
MAX5251AEAP+ ,+3V, Quad, 10-Bit Voltage-Output DAC with Serial Interface
MAX5251BCAP ,+3V, Quad, 10-Bit Voltage-Output DAC with Serial Interface
MAX5251BCAP+ ,+3V, Quad, 10-Bit Voltage-Output DAC with Serial Interface
MAX5253ACPP ,+3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface
MAX5253ACPP+ ,+3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface
MAX9718AETB+T ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersELECTRICAL CHARACTERISTICS—5V Supply(V = 5V, GND = 0, SHDN/SHDN = V (MAX9718/MAX9719), SHDM = GND ( ..
MAX9718AEUB ,Low-Cost, Mono/Stereo,1.4W Differential Audio Power AmplifiersFeaturesThe MAX9718/MAX9719 differential input audio power 2.7V to 5.5V Single-Supply Operationamp ..
MAX9718DETB+T ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersFeaturesThe MAX9718/MAX9719 differential input audio power♦ 2.7V to 5.5V Single-Supply Operationamp ..
MAX9718EEBL+TG45 ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersMAX9718/MAX971919-3050; Rev 7; 4/10Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers
MAX9718HEBL+T ,Low-Cost, Mono/Stereo, 1.4W Differential Audio Power AmplifiersELECTRICAL CHARACTERISTICS—5V Supply (continued)(V = 5V, GND = 0, SHDN/SHDN = V (MAX9718/MAX9719), ..
MAX971CSA ,Ultra-Low-Power, Open-Drain, Single/Dual-Supply ComparatorsFeaturesThe MAX971–MAX974 and MAX981–MAX984 single/' µMAX Package—Smallest 8-Pin SOdual/quad low-vo ..
MAX5250ACAP+-MAX5250BEAP+
Low-Power, Quad, 10-Bit Voltage-Output DAC with Serial Interface
__________________General DescriptionThe +5V MAX5250 combines four low-power, voltage-
output, 10-bit digital-to-analog converters (DACs) and
four precision output amplifiers in a space-saving, 20-
pin package. In addition to the four voltage outputs,
each amplifier’s negative input is also available to the
user. This facilitates specific gain configurations, remote
sensing, and high output drive capacity, making the
MAX5250 ideal for industrial-process-control applica-
tions. Other features include software shutdown, hard-
ware shutdown lockout, an active-low reset that clears
all registers and DACs to zero, a user-programmable
logic output, and a serial-data output.
Each DAC has a double-buffered input organized as an
input register followed by a DAC register. A 16-bit serial
word loads data into each input/DAC register. The
3-wire serial interface is compatible with SPI™/QSPI™
and MICROWIRE™. It allows the input and DAC regis-
ters to be updated independently or simultaneously with
a single software command. All logic inputs are
TTL/CMOS-logic compatible.
________________________ApplicationsDigital Offset and Gain Adjustment
Microprocessor-Controlled Systems
Industrial Process Controls
Automatic Test Equipment
Remote Industrial Controls
Motion Control
______________________________FeaturesFour 10-Bit DACs with Configurable
Output Amplifiers+5V Single-Supply OperationLow Supply Current: 0.85mA Normal Operation
10µA Shutdown ModeAvailable in 20-Pin SSOP and DIP PackagesPower-On Reset Clears all Registers and
DACs to ZeroSPI/QSPI and MICROWIRECompatibleSimultaneous or Independent Control of DACs
through 3-Wire Serial InterfaceUser-Programmable Digital OutputSchmitt-Trigger Inputs for Direct Optocoupler
Interface12-Bit Upgrade Available: MAX525
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface19-1171; Rev 1; 10/02
SPI and QSPI are trademarks of Motorola, Inc. MICROWIREis a trademark of National Semiconductor Corp.
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +5V ±10%, AGND = DGND = 0V, REFAB = REFCD = 2.5V, RL= 5kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise
noted. Typical values are at TA= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)
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............................................................-0.3V to +6V
VDDto DGND...........................................................-0.3V to +6V
AGND to DGND..................................................................±0.3V
REFAB, REFCD to AGND...........................-0.3V to (VDD+ 0.3V)
OUT_, FB_ to AGND...................................-0.3V to (VDD+ 0.3V)
Digital Inputs to DGND.............................................-0.3V to +6V
DOUT, UPO to DGND................................-0.3V to (VDD+ 0.3V)
Continuous Current into Any Pin.......................................±20mA
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 8.00mW/°C above +70°C).................640mW
SSOP (derate 8.00mW/°C above +70°C)......................640mW
CERDIP (derate 11.11mW/°C above +70°C).................889mW
Operating Temperature Ranges
MAX5250_C_P......................................................0°C to +70°C
MAX5250_E_P...................................................-40°C to +85°C
MAX5250BMJP................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
ELECTRICAL CHARACTERISTICS (continued)(VDD= +5V ±10%, AGND = DGND = 0V, REFAB = REFCD = 2.5V, RL= 5kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise
noted. Typical values are at TA= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)
Note 1:Guaranteed from code 3 to code 1023 in unity-gain configuration.
Note 2:Accuracy is better than 1LSB for VOUT= 6mV to VDD- 60mV, guaranteed by a power-supply rejection test at the
end points.
Note 3:RL= ∞, digital inputs at DGND or VDD.
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
__________________________________________Typical Operating Characteristics(VDD = +5V, TA = +25°C, unless otherwise noted.)
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
ELECTRICAL CHARACTERISTICS (continued)(VDD= +5V ±10%, AGND = DGND = 0V, REFAB = REFCD = 2.5V, RL= 5kΩ, CL= 100pF, TA= TMINto TMAX, unless otherwise
noted. Typical values are at TA= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial InterfaceTOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAX5250-05
FREQUENCY (kHz)
THD + NOISE (%)
OUTPUT FFT PLOT
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
____________________________Typical Operating Characteristics (continued)
(VDD = +5V, TA = +25°C, unless otherwise noted.)
FULL-SCALE ERROR
vs. LOAD
MAX5250-09
LOAD (kΩ)
FULL-SCALE ERROR (LSB)
REFERENCE FEEDTHROUGH
AT 1kHz
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
-80
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
____________________________Typical Operating Characteristics (continued)(VDD = +5V, VREF= 2.5V, RL= 5kΩ, CL= 100pF, TA = +25°C, unless otherwise noted.)
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
______________________________________________________________Pin Description
MAX5250
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
_______________Detailed DescriptionThe MAX5250 contains four 10-bit, voltage-output digi-
tal-to-analog converters (DACs) that are easily
addressed using a simple 3-wire serial interface. It
includes a 16-bit data-in/data-out shift register, and
each DAC has a doubled-buffered input composed of
an input register and a DAC register (see Functional
Diagram). In addition to the four voltage outputs, each
amplifier’s negative input is available to the user.
The DACs are inverted R-2R ladder networks that con-
vert a digital input (10 data bits plus 2 sub-bits) into
equivalent analog output voltages in proportion to the
applied reference voltage inputs. DACs A and B share
the REFAB reference input, while DACs C and D share
the REFCD reference input. The two reference inputs
allow different full-scale output voltage ranges for each
pair of DACs. Figure 1 shows a simplified circuit dia-
gram of one of the four DACs.
Reference InputsThe two reference inputs accept positive DC and AC
signals. The voltage at each reference input sets the
full-scale output voltage for its two corresponding
DACs. The reference input voltage range is 0V to
(VDD- 1.4V). The output voltages (VOUT_)are repre-
sented by a digitally programmable voltage source as:
VOUT_= (VREFx NB / 1024) x Gain
where NB is the numeric value of the DAC’s binary
input code (0 to 1023), VREFis the reference voltage,
and Gain is the externally set voltage gain.
The impedance at each reference input is code depen-
dent, ranging from a low value of 10kΩwhen both
DACs connected to the reference have an input code
of 554 hex, to a high value exceeding several giga
ohms (leakage currents) with an input code of 000 hex.
Because the input impedance at the reference pins is
code dependent, load regulation of the reference
source is important.
The REFAB and REFCD reference inputs have a 10kΩ
guaranteed minimum input impedance. When the two
reference inputs are driven from the same source, the
effective minimum impedance is 5kΩ. A voltage refer-
ence with a load regulation of 6ppm/mA, such as the
MAX873, would typically deviate by 0.006LSB (0.015LSB
worst case) when driving both MAX5250 reference
inputs simultaneously at 2.5V. Driving the REFAB and
REFCD pins separately improves reference accuracy.
In shutdown mode, the MAX5250’s REFAB and REFCD
inputs enter a high-impedance state with a typical input
leakage current of 0.01µA.
The reference input capacitance is also code depen-
dent and typically ranges from 20pF with an input code
of all 0s to 100pF at full scale.
Output AmplifiersAll MAX5250 DAC outputs are internally buffered by pre-
cision amplifiers with a typical slew rate of 0.6V/µs.
Access to each output amplifier’s inverting input provides
the user greater flexibility in output gain setting/
signal conditioning (see the Applications Information
section).
With a full-scale transition at the MAX5250 output, the
typical settling time to ±1/2LSB is 10µs when loaded
with 5kΩin parallel with 100pF (loads less than 2kΩ
degrade performance).
The MAX5250 output amplifier’s output dynamic
responses and settling performances are shown in the
Typical Operating Characteristics.
Power-Down ModeThe MAX5250 features a software-programmable shut-
down that reduces supply current to a typical value of
10µA. The power-down lockout pin (PDL) must be high to
enable shutdown mode. Writing 1100XXXXXXXXXXXXas
the input-control word puts the MAX5250 in power-down
mode (Table 1).
