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Maxim MAX533 Manual

2.7v, low-power, 8-bit quad dac with rail-to-rail output buffers
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19-1080; Rev 0; 6/96
_______________General Description
The MAX533 serial-input, voltage-output, 8-bit quad
digital-to-analog converter (DAC) operates from a sin-
gle +2.7V to +3.6V supply. Internal precision buffers
swing rail to rail, and the reference input range includes
both ground and the positive rail. The MAX533 features
a 1µA shutdown mode.
The serial interface is double buffered: a 12-bit input
shift register is followed by four 8-bit buffer registers
and four 8-bit DAC registers. The 12-bit serial word
consists of eight data bits and four control bits (for DAC
selection and special programming commands). Both
the input and DAC registers can be updated indepen-
dently or simultaneously with a single software com-
mand. Two additional asynchronous control pins, LDAC
and CLR, provide simultaneous updating or clearing of
the input and DAC registers.
The interface is compatible with SPI™, QSPI™ (CPOL =
CPHA = 0 or CPOL = CPHA = 1), and Microwire™. A
buffered data output allows daisy chaining of serial
devices.
In addition to 16-pin DIP and CERDIP packages, the
MAX533 is available in a 16-pin QSOP that occupies
the same area as an 8-pin SO.
________________________Applications
Digital Gain and Offset Adjustments
Programmable Attenuators
Programmable Current Sources
Portable Instruments
__________________Pin Configuration
TOP VIEW
OUTB
1
OUTA
2
REF
3
MAX533
UPO
4
PDE
5
LDAC
6
CLR
7
DOUT
8
DIP/QSOP
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
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
____________________________Features
+2.7V to +3.6V Single-Supply Operation
Ultra-Low Supply Current:
Ultra-Small 16-Pin QSOP Package
Ground to V
Output Buffer Amplifiers Swing Rail to Rail
10MHz Serial Interface, Compatible with SPI, QSPI
(CPOL = CPHA = 0 or CPOL = CPHA = 1), and
Microwire
Double-Buffered Registers for Synchronous
Updating
Serial Data Output for Daisy Chaining
Power-On Reset Clears Serial Interface and Sets
All Registers to Zero
Software Shutdown
Software-Programmable Logic Output
Asynchronous Hardware Clear Resets All Internal
Registers to Zero
______________Ordering Information
MAX533ACPE
MAX533BCPE
MAX533ACEE
MAX533BCEE
MAX533BC/D
16
OUTC
MAX533AEPE
15
OUTD
MAX533BEPE
14
MAX533AEEE
AGND
MAX533BEEE
13
V
DD
MAX533AMJE
12
DGND
MAX533BMJE
11
DIN
*Dice are tested at T
10
SCLK
**Contact factory for availability and processing to MIL-STD-883.
9
CS
Functional Diagram appears at end of data sheet.
0.7mA while Operating
1µA in Shutdown Mode
Reference Input Range
DD
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C 16 CERDIP**
-55°C to +125°C 16 CERDIP**
= +25°C.
A
INL
PIN-PACKAGE
(LSB)
16 Plastic DIP
±1
16 Plastic DIP
±2
16 QSOP
±1
16 QSOP
±2
Dice*
±2
16 Plastic DIP
±1
16 Plastic DIP
±2
16 QSOP
±1
16 QSOP
±2
±1
±2
1

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Summary of Contents for Maxim MAX533

  • Page 1 Functional Diagram appears at end of data sheet. DIP/QSOP 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...

  • Page 2: Absolute Maximum Ratings

    AGND to DGND ..............±0.3V Operating Temperature Ranges REF ..............-0.3V, (V + 0.3V) MAX533 _ C_ E ..........0°C to +70°C OUT_ ................-0.3V, V MAX533 _ E_ E ..........-40°C to +85°C Maximum Current into Any Pin..........50mA MAX533 _ MJE ..........-55°C to +125°C Storage Temperature Range ......-65°C to +150°C...

  • Page 3: Timing Characteristics

    2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers ELECTRICAL CHARACTERISTICS (continued) = +2.7V to +3.6V, V = 2.5V, AGND = DGND = 0V, R = 10kΩ, C = 100pF, T to T , unless otherwise noted. Typical values are at V = +3V and T = +25°C.) PARAMETER...
  • Page 4 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers TIMING CHARACTERISTICS (continued) = +2.7V to +3.6V, V = 2.5V, AGND = DGND = 0V, C = 100pF, T to T , unless otherwise noted. DOUT Typical values are at V = +3V and T = +25°C.) PARAMETER...
  • Page 5 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers __________________________________________Typical Operating Characteristics = +3V, T = +25°C, unless otherwise noted.) DAC ZERO-CODE OUTPUT VOLTAGE vs. DAC FULL-SCALE OUTPUT VOLTAGE vs. SUPPLY CURRENT vs. OUTPUT SINK CURRENT OUTPUT SOURCE CURRENT TEMPERATURE 1.50 1000 DAC CODE = FF HEX...
  • Page 6 CENTERED AT 2.5V DAC CODE = FF HEX = +3.0V 0.01 0.01 FREQUENCY (MHz) FREQUENCY (MHz) WORST-CASE 1LSB DIGITAL WORST-CASE 1LSB DIGITAL STEP CHANGE (NEGATIVE) STEP CHANGE (POSITIVE) MAX533-TOC11 MAX533-TOC10 2V/div 2V/div OUTA 50mV/div OUTA 50mV/div 2µs/div 2µs/div = 3.0V DAC CODE = 80 TO 7F hex = 3.0V...
  • Page 7 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers ____________________________Typical Operating Characteristics (continued) = +3V, T = +25°C, unless otherwise noted.) POSITIVE SETTLING TIME NEGATIVE SETTLING TIME MAX533-TOC15 MAX533-TOC16 2V/div 2V/div OUTA OUTA 1V/div 1V/div 5µs/div 5µs/div = 3.0V DAC CODE = FF TO 00 hex = 3.0V...
  • Page 8 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers INSTRUCTION EXECUTED • • • • • • SCLK • • • A1 A0 C1 C0 D7 D6 D5 D4 D3 D2 D1 D0 A1 A0 C1 C0 D7 D6 D5 D4 D3 D2 D1 D0 DACA DACD •...

  • Page 9: Serial Interface

    For example, to load all four DAC registers simultaneously with individual settings (DAC A = 0.5V, DAC B = 1V, MAX533’s internal shift register on the rising edge of DAC C = 1.5V, and DAC D = 2V), four commands are the external serial clock.
  • Page 10 10µA max. The NOP command (no operation) allows data to be shifted through the MAX533 shift register without affect- ing the input or DAC registers. This is useful in daisy chaining (also see the Daisy Chaining Devices section).
  • Page 11 SCLK’s rising edge. Once this command is issued, SCLK DOUT’s phase is latched and will not change except on power-up or if the specific command to set the phase MAX533 to falling edge is issued. MICROWIRE This command also loads all DAC registers with the con-...

  • Page 12: Analog Section

    DAC Operation ble. For SPI and QSPI, clear the CPOL and CPHA con- The MAX533 uses a matrix decoding architecture for figuration bits (CPOL = CPHA = 0). The SPI/QSPI CPOL the DACs, which saves power in the overall system.
  • Page 13 Figure 7. Multiple MAX533s sharing one DIN line. Simultaneously update by strobing LDAC, or specifically update by enabling an individual CS. Output Buffer Amplifiers __________Applications Information All MAX533 voltage outputs are internally buffered by DAC Linearity and Voltage Offset precision unity-gain followers that slew at about The output buffer can have a negative input offset volt- 0.6V/µs.

  • Page 14: Power Sequencing

    0 0 0 0 In unipolar operation, the output voltages and the refer- ence input are the same polarity. Figure 11 shows the MAX533 unipolar configuration, and Table 2 shows the Note: 1LSB = (V ) (2 ) = +V ––––...
  • Page 15 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers REFERENCE INPUT REFAB MAX533 DAC A OUTA SYSTEM GND OUTC OUTB OUTB DAC B OUTD OUTA SERIAL AGND INTERFACE NOT SHOWN DAC C OUTC DAC D OUTD DGND AGND Figure 10. Suggested PC Board Layout for Minimizing Figure 11.
  • Page 16 PACKAGE Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product.

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