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MAX5253 Datasheet

Download or read online Maxim Integrated MAX5253 +3V / Quad / 12-Bit Voltage-Output DAC with Serial Interface pdf datasheet.



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19-1123; Rev 0; 9/96
+3V, Quad, 12-Bit Voltage-Output DAC
__________________General Description
The MAX5253 combines four low-power, voltage-output,
12-bit digital-to-analog converters (DACs) and four pre-
cision output amplifiers in a space-saving, 20-pin pack-
age. 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
MAX5253 ideal for industrial-process-control applica-
tions. Other features include software shutdown, hard-
ware shutdown lockout, an active-low reset which 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 serial
interface is compatible with SPI™/QSPI™ and
Microwire™. It allows the input and DAC registers to be
updated independently or simultaneously with a single
software command. The DAC registers can be simulta-
neously updated via the 3-wire serial interface. All logic
inputs are TTL/CMOS-logic compatible.
________________________Applications
Industrial Process Controls
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
Remote Industrial Controls
Microprocessor-Controlled Systems
_________________________________________________________________________Functional Diagram
DOUT
CL
PDL
DECODE
CONTROL
16-BIT
SHIFT
REGISTER
SR
LOGIC
CONTROL
OUTPUT
CS DIN SCLK
UPO
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
with Serial Interface
______________________________Features
Four 12-Bit DACs with Configurable
Output Amplifiers
+3.0V to +3.6V Single-Supply Operation
Low Supply Current: 0.82mA Normal Operation
Reference Inputs are High Impedance in Shutdown
Available in 20-Pin SSOP
Power-On Reset Clears all Registers and
DACs to Zero
SPI/QSPI and Microwire Compatible
Simultaneous or Independent Control of DACs
via 3-Wire Serial Interface
User-Programmable Digital Output
_________________Ordering Information
PART
MAX5253ACPP
MAX5253BCPP
MAX5253ACAP
MAX5253BCAP
Ordering Information continued on last page.
Pin Configuration appears at end of data sheet.
V
REFAB
DGND
AGND
DD
MAX5253
INPUT
DAC A
DAC A
REGISTER A
REGISTER A
INPUT
DAC B
DAC B
REGISTER B
REGISTER B
INPUT
DAC C
DAC C
REGISTER C
REGISTER C
INPUT
DAC D
DAC D
REGISTER D
REGISTER D
REFCD
3µA Shutdown Mode
INL
TEMP. RANGE
PIN-PACKAGE
(LSB)
0°C to +70°C
20 Plastic DIP
±1/2
0°C to +70°C
20 Plastic DIP
±1
0°C to +70°C
20 SSOP
±1/2
0°C to +70°C
20 SSOP
±1
FBA
OUTA
FBB
OUTB
FBC
OUTC
FBD
OUTD
1

Summary of Contents

Page 1

... Rev 0; 9/96 3V, Quad, 12-Bit Voltage-Output DAC ___General Description The MAX5253 combines four low-power, voltage-output, 12-bit digital-to-analog converters (DACs) and four pre- cision output amplifiers in a space-saving, 20-pin pack- age. In addition to the four voltage outputs, each amplifiers negative input is also available to the user. ...

Page 2

... INL REFERENCE INPUT Reference Input Range V REF Reference Input Resistance R REF 2 ___ Operating Temperature Ranges MAX5253_C_P ...0°C to 70°C MAX5253_E_P ...-40°C to 85°C 0.3V) MAX5253BMJP ...-55°C to 125° 0.3V) Storage Temperature Range ...-65°C to 150°C DD Lead Temperature (soldering, 10sec) ...300°C 0.3V 5kΩ, C ...

Page 3

Quad, 12-Bit Voltage-Output DAC ELECTRICAL CHARACTERISTICS (continued 3.0V to 3.6V, AGND DGND 0V, REFAB REFCD 1.25V noted. Typical values are 25°C. Output buffer connected in unity-gain configuration (Figure ...

Page 4

Quad, 12-Bit Voltage-Output DAC with Serial Interface TIMING CHARACTERISTICS (V 3.0V to 3.6V, AGND DGND 0V, REFAB REFCD 1.25V noted. Typical values are 25°C. Output buffer connected in unity-gain configuration ...

Page 5

Quad, 12-Bit Voltage-Output DAC ___Typical Operating Characteristics (continued 3.3V 25°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 1000 950 900 850 800 750 700 650 600 550 CODE FFF hex 500 ...

Page 6

... CS PDL CL 3.3V, DIN 0V DAC A CODE SET TO 800 hex OUTA, 500mV/div OUTB, AC COUPLED 10mV/div MAX5253- 1.25V, R REF SWITCHING FROM CODE 000 hex TO FB4 hex OUTPUT AMPLIFIER GAIN 2.6 SCLK, 2V/div OUTA, AC COUPLED 10mV/div MAX5253-08 2 s/div 100pF L DYNAMIC RESPONSE OUTA, 500mV/div MAX5253-13 10 s/div 100pF L L ...

Page 7

Quad, 12-Bit Voltage-Output DAC ___Pin Description PIN NAME 1 AGND Analog Ground 2 FBA DAC A Output Amplifier Feedback 3 OUTA DAC A Output Voltage 4 OUTB DAC B Output Voltage 5 FBB DAC B Output Amplifier Feedback 6 ...

Page 8

... The MAX5253 features a software-programmable shut- down that reduces supply current to a typical value of 3µA. The power-down lockout (PDL) pin must be high to enable the shutdown mode. Writing 1100XXXXXXXXXXXX as the input-control word puts the MAX5253 in shutdown mode (Table 1). DD Output Amplifiers Shutdown Mode ...

Page 9

... How the part is configured when exiting shutdown mode. ___ with Serial Interface SCLK SK DIN SO MAX5253 DOUT SI CS I/O THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX5253, BUT MAY BE USED FOR READBACK PURPOSES. Figure 2. Connections for Microwire DOUT MISO DIN MOSI MAX5253 SCLK SCK CS I/O CPOL 0, CPHA 0 THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX5253, BUT MAY BE USED FOR READBACK PURPOSES ...

Page 10

... Register allows all input and DAC registers to be simul- taneously loaded with the same digital code from the input shift register. The no operation (NOP) command leaves the register contents unaffected and is useful when the MAX5253 is configured in a daisy chain (see the Daisy Chaining Devices section). The command to 10 ___ ...

Page 11

... Refer to the serial-data-out V cations in the Electrical Characteristics. Figure 8 shows an alternate method of connecting sev- eral MAX5253s. In this configuration, the data bus is common to all devices; data is not shifted through a daisy chain. More I/O lines are required in this configu- ration because a dedicated chip-select input (CS) is required for each IC ...

Page 12

... Serial Interface MAX5253 SCLK SCLK DIN DOUT DIN CS CS Figure 7. Daisy-Chaining MAX5253s DIN SCLK CS1 CS2 CS3 CS MAX5253 SCLK DIN Figure 8. Multiple MAX5253s Sharing a Common DIN Line 12 ___ MAX5253 MAX5253 SCLK SCLK DOUT DOUT DIN DIN MAX5253 MAX5253 SCLK SCLK ...

Page 13

... Unipolar Output For a unipolar output, the output voltages and the refer- ence inputs have the same polarity. Figure 9 shows the MAX5253 unipolar output circuit, which is also the typi- cal operating circuit. Table 2 lists the unipolar output codes. For rail-to-rail outputs, see Figure 10. This circuit shows the MAX5253 with the output amplifiers configured with a closed-loop gain of 2 ...

Page 14

... REFAB/REFCD. The reference voltage must never be more negative than DGND. OUTA 10k FBB The MAX5253s total harmonic distortion plus noise (THD N) is typically less than -72dB, given a 1Vp-p 16k signal swing and input frequencies up to 25kHz. The OUTB ...

Page 15

... Power-Supply Considerations On power-up, all input and DAC registers are cleared (set to zero code) and DOUT is in Mode 0 (serial data is shifted out of DOUT on the clocks falling edge). For rated MAX5253 performance, limit REFAB/REFCD to less than 1.4V below V . Bypass V DD capacitor in parallel with a 0.1µF capacitor to AGND. ...

Page 16

... MAX5253AEPP -40°C to 85°C 20 Plastic DIP MAX5253BEPP -40°C to 85°C 20 Plastic DIP MAX5253AEAP -40°C to 85°C 20 SSOP MAX5253BEAP -40°C to 85°C 20 SSOP MAX5253BMJP -55°C to 125°C 20 CERDIP Dice are specified 25°C, DC parameters only Contact factory for availability and processing to MIL-STD-883. ___Package Information ...

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