19-1080; Rev 0; 6/96
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
_______________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.
____________________________Features
o
+2.7V to +3.6V Single-Supply Operation
o
Ultra-Low Supply Current:
0.7mA while Operating
1µA in Shutdown Mode
o
Ultra-Small 16-Pin QSOP Package
o
Ground to V
DD
Reference Input Range
o
Output Buffer Amplifiers Swing Rail to Rail
o
10MHz Serial Interface, Compatible with SPI, QSPI
(CPOL = CPHA = 0 or CPOL = CPHA = 1), and
Microwire
o
Double-Buffered Registers for Synchronous
Updating
o
Serial Data Output for Daisy Chaining
o
Power-On Reset Clears Serial Interface and Sets
All Registers to Zero
o
Software Shutdown
o
Software-Programmable Logic Output
o
Asynchronous Hardware Clear Resets All Internal
Registers to Zero
MAX533
________________________Applications
Digital Gain and Offset Adjustments
Programmable Attenuators
Programmable Current Sources
Portable Instruments
______________Ordering Information
PART
MAX533ACPE
MAX533BCPE
MAX533ACEE
MAX533BCEE
MAX533BC/D
MAX533AEPE
MAX533BEPE
MAX533AEEE
MAX533BEEE
MAX533AMJE
MAX533BMJE
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
-55°C to +125°C
PIN-PACKAGE
16 Plastic DIP
16 Plastic DIP
16 QSOP
16 QSOP
Dice*
16 Plastic DIP
16 Plastic DIP
16 QSOP
16 QSOP
16 CERDIP**
16 CERDIP**
INL
(LSB)
±1
±2
±1
±2
±2
±1
±2
±1
±2
±1
±2
__________________Pin Configuration
TOP VIEW
OUTB 1
OUTA 2
REF 3
UPO 4
PDE 5
LDAC 6
CLR 7
DOUT 8
16 OUTC
15 OUTD
14 AGND
MAX533
13 V
DD
12 DGND
11 DIN
10 SCLK
9
CS
*Dice are tested at T
A
= +25°C.
**Contact factory for availability and processing to MIL-STD-883.
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
1
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
MAX533
ABSOLUTE MAXIMUM RATINGS
V
DD
to DGND ..............................................................-0.3V, +6V
V
DD
to AGND...............................................................-0.3V, +6V
Digital Input Voltage to DGND ....................................-0.3V, +6V
Digital Output Voltage to DGND....................-0.3V, (V
DD
+ 0.3V)
AGND to DGND ..................................................................±0.3V
REF ................................................................-0.3V, (V
DD
+ 0.3V)
OUT_ ...........................................................................-0.3V, V
DD
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) .........842mW
QSOP (derate 8.3mW/°C above +70°C) .....................667mW
CERDIP (derate 10.00mW/°C above +70°C) ..............800mW
Operating Temperature Ranges
MAX533 _ C_ E ..................................................0°C to +70°C
MAX533 _ E_ E ...............................................-40°C to +85°C
MAX533 _ MJE .............................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°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.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V, V
REF
= 2.5V, AGND = DGND = 0V, R
L
= 10kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at V
DD
= +3V and T
A
= +25°C.)
PARAMETER
STATIC ACCURACY
Resolution
Integral Nonlinearity
(Note 1)
Differential Nonlinearity (Note 1)
Zero-Code Error
Zero-Code-Error Supply
Rejection
Zero-Code Temperature
Coefficient
Full-Scale Error
Full-Scale Error Supply
Rejection
Full-Scale Temperature
Coefficient
REFERENCE INPUTS
Input Voltage Range
Input Resistance
Input Capacitance
Channel-to-Channel Isolation
AC Feedthrough
DAC OUTPUTS
Output Voltage Range
Load Regulation
R
L
= open
Code = FF hex, R
L
from 10kΩ to
∞
0
V
REF
0.25
V
LSB
(Note 2)
(Note 3)
0
322
460
10
-60
-70
V
DD
598
V
kΩ
pF
dB
dB
INL
DNL
ZCE
MAX533A
MAX533B
Guaranteed monotonic (all codes)
Code = 00 hex
Code = 00 hex, V
DD
= 2.7V to 3.6V
Code = 00 hex
Code = FF hex
Code = FF hex, V
DD
= 2.7V to 3.6V
Code = FF hex
±10
±10
±30
1
8
±1
±2
±1.0
±20
1
Bits
LSB
LSB
mV
LSB
µV/°C
mV
LSB
µV/°C
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V, V
REF
= 2.5V, AGND = DGND = 0V, R
L
= 10kΩ, C
L
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at V
DD
= +3V and T
A
= +25°C.)
PARAMETER
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
DIGITAL OUTPUTS
Output High Voltage
Output Low Voltage
DYNAMIC PERFORMANCE
Voltage-Output Slew Rate
Output Settling Time
Digital Feedthrough and
Crosstalk
Digital-to-Analog Glitch Impulse
Signal-to-Noise Plus
Distortion Ratio
Multiplying Bandwidth
Wideband Amplifier Noise
POWER SUPPLIES
Power-Supply Voltage
Supply Current
Shutdown Current
V
DD
I
DD
MAX533C/E
MAX533M
2.7
0.68
0.68
1
3.6
1.3
1.5
10
V
mA
µA
SINAD
CODE = FF hex
To 1/2LSB, from code 00 to code FF hex
(Note 5)
VREF = 0V, code 00 to code FF hex (Note 6)
Code 80 hex to code 7F hex
V
REF
= 2.5Vp-p at 1kHz, V
DD
= 3V,
code = FF hex
V
REF
= 2.5Vp-p at 10kHz
V
REF
= 0.5Vp-p, 3dB bandwidth
0.6
6
5
50
-70
-62
380
60
kHz
µV
RMS
V/µs
µs
nV-s
nV-s
dB
V
OH
V
OL
I
SOURCE
= TBDmA
I
SINK
= 1.6mA
V
DD
- 0.5
0.4
V
V
V
IH
V
IL
I
IN
C
IN
V
IN
= 0V or V
DD
(Note 4)
0.7V
DD
0.3V
DD
±1.0
10
V
V
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX533
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +3.6V, V
REF
= 2.5V, AGND = DGND = 0V, C
DOUT
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at V
DD
= +3V and T
A
= +25°C.)
PARAMETER
V
DD
Rise to
CS
Fall Setup Time
(Note 4)
LDAC
Pulse Width Low
CS
Rise to
LDAC
Fall Setup
Time (Note 7)
CLR
Pulse Width Low
CS
Pulse Width High
SYMBOL
t
VDCS
t
LDAC
t
CLL
t
CLW
t
CSW
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
40
50
40
50
40
50
90
100
20
25
20
25
CONDITIONS
MIN
TYP
MAX
50
60
UNITS
µs
ns
ns
ns
ns
_______________________________________________________________________________________
3
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
MAX533
TIMING CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V, V
REF
= 2.5V, AGND = DGND = 0V, C
DOUT
= 100pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at V
DD
= +3V and T
A
= +25°C.)
PARAMETER
SERIAL-INTERFACE TIMING
SCLK Clock Frequency (Note 8)
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup
Time
SCLK Rise to
CS
Rise Hold Time
DIN to SCLK Rise to Setup Time
DIN to SCLK Rise to Hold Time
SCLK Rise to DOUT Valid
Propagation Delay (Note 9)
SCLK Fall to DOUT Valid
Propagation Delay (Note 10)
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Setup
Time
f
CLK
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
40
50
40
50
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
MAX533C/E
MAX533M
40
50
40
50
40
50
0
40
50
0
200
230
210
250
ns
ns
ns
ns
ns
10
8.3
MHz
ns
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
INL and DNL are measured with R
L
referenced to ground. Nonlinearity is measured from the first code that is greater than
or equal to the maximum offset specification to code FF hex (full scale). See
DAC Linearity and Voltage Offset
section.
Note 2:
V
REF
= 2.5Vp-p, 10kHz. Channel-to-channel isolation is measured by setting one DAC’s code to FF hex and setting all
other DAC’s codes to 00 hex.
Note 3:
V
REF
= 2.5Vp-p, 10kHz. DAC code = 00 hex.
Note 4:
Guaranteed by design, not production tested.
Note 5:
Output settling time is measured from the 50% point of the rising edge of
CS
to 1/2LSB of V
OUT
’s final value.
Note 6:
Digital crosstalk is defined as the glitch energy at any DAC output in response to a full-scale step change on any other
DAC.
Note 7:
If
LDAC
is activated prior to
CS’s
rising edge, it must stay low for t
LDAC
or longer after
CS
goes high.
Note 8:
When DOUT is not used. If DOUT is used, f
CLK
max is 4MHz, due to the SCLK to DOUT propagation delay.
Note 9:
Serial data clocked out at SCLK’s rising edge (measured from 50% of the clock edge to 20% or 80% of V
DD
).
Note 10:
Serial data clocked out at SCLK’s falling edge (measured from 50% of the clock edge to 20% or 80% of V
DD
).
4
_______________________________________________________________________________________
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
__________________________________________Typical Operating Characteristics
(V
DD
= +3V, T
A
= +25°C, unless otherwise noted.)
DAC ZERO-CODE OUTPUT VOLTAGE vs.
OUTPUT SINK CURRENT
MAX533-TOC1
MAX533
MAX533
DAC FULL-SCALE OUTPUT VOLTAGE vs.
OUTPUT SOURCE CURRENT
MAX533-TOC2
SUPPLY CURRENT vs.
TEMPERATURE
DAC CODE = FF HEX
800
SUPPLY CURRENT (µA)
V
DD
= +5.0V
V
REF
= +4.5V
V
DD
= +3.0V
V
REF
= +2.5V
MAX533-TOC3
MAX533-TOC6
1.50
DAC ZERO-CODE OUTPUT VOLTAGE (V)
1.25
1.00
0.75
0.50
0.25
0
0
1
2
3
4
5
6
7
V
DD
= V
REF
= 3.0V
V
DD
= V
REF
= 5.0V
DAC CODE = 00 HEX
LOAD TO V
DD
5.0
DAC FULL-SCALE OUTPUT VOLTAGE (V)
4.5
4.0
3.5
3.0
2.5
2.0
DAC CODE = FF HEX
LOAD TO GND
V
DD
= V
REF
= 5.0V
1000
600
400
DAC CODE = 00 HEX
200
V
DD
= V
REF
= 3.0V
0
0
2
4
6
8
10
12
-55 -35 -15
5
25
45
65 85 105 125
DAC OUTPUT SOURCE CODE (mA)
TEMPERATURE (°C)
8
DAC OUTPUT SINK CURRENT (mA)
SHUTDOWN SUPPLY CURRENT vs.
TEMPERATURE
MAX533-TOC4
SUPPLY CURRENT vs.
REFERENCE VOLTAGE (V
DD
= +3.0V)
MAX533-TOC5
SUPPLY CURRENT vs.
REFERENCE VOLTAGE (V
DD
= +5.0V)
1000
ALL DAC CODES = FF HEX
5
SHUTDOWN SUPPLY CURRENT (µA)
1000
3
SUPPLY CURRENT (µA)
800
3
V
DD
= +5.0V
2
V
DD
= +3.0V
600
SUPPLY CURRENT (µA)
ALL DAC CODES = FF HEX
800
600
ALL DAC CODES = 00 HEX
400
ALL DAC CODES = 00 HEX
400
1
0
200
0
200
0
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
-55 -35 -15
5
25
45
65 85 105 125
TEMPERATURE (°C)
THD + NOISE AT DAC OUTPUT vs.
REFERENCE AMPLITUDE
MAX533-TOC7
THD + NOISE AT DAC OUTPUT vs.
REFERENCE FREQUENCY
V
DD
= +3.0V
V
REF
= SINE WAVE
CENTERED AT 1.2V
DAC CODE = FF HEX
500kHz LOWPASS FILTER
V
REF
= 2V
p-p
-50
V
REF
= 1V
P-P
-60
V
REF
= 0.5V
p-p
1
0.1
1
FREQUENCY (kHz)
10
100
MAX533-TOC8
-30
V
DD
= +3.0V
V
REF
= SINE WAVE
CENTERED AT 1.2V
DAC C0DE = FF HEX
80kHz LOWPASS FILTER
V
REF
= 20kHz
-20
-40
THD + NOISE (dB)
-30
THD + NOISE (dB)
2.0
-40
-50
-60
V
REF
= 1kHz
-70
0
0.5
1.0
1.5
REFERENCE AMPLITUDE (V
p-p
)
-70
_______________________________________________________________________________________
5
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