19-0257; Rev 3; 12/95
Octal, 13-Bit Voltage-Output DAC
with Parallel Interface
_________________General Description
The MAX547 contains eight 13-bit, voltage-output digital-to-
analog converters (DACs). On-chip precision output ampli-
fiers provide the voltage outputs. The MAX547 operates
from a ±5V supply. Bipolar output voltages with up to ±4.5V
voltage swing can be achieved with no external compo-
nents. The MAX547 has four separate reference inputs;
each is connected to two DACs, providing different full-
scale output voltages for every DAC pair.
The MAX547 features double-buffered interface logic with a
13-bit parallel data bus. Each DAC has an input latch and a
DAC latch. Data in the DAC latch sets the output voltage. The
eight input latches are addressed with three address lines.
Data is loaded to the input latch with a single write instruction.
–—
—–
An asynchronous load (LD_ ) input transfers data from the
–—
—–
input latch to the DAC latch. The four LD_ inputs each control
two DACs, and all DAC latches can be updated simultane-
–—
—–
–—
—–
ously by asserting all LD_ pins. An asynchronous clear (CLR)
input resets the output of all eight DACs to AGND_. Asserting
–—
—–
CLR resets both the DAC and the input latch to bipolar zero
(1000hex). On power-up, reset circuitry performs the same
–—
—–
function as CLR. All logic inputs are TTL/CMOS compatible.
The MAX547 is available in 44-pin plastic quad flat pack
and 44-pin PLCC packages.
_____________________________Features
Full 13-Bit Performance without Adjustments
8 DACs in One Package
Buffered Voltage Outputs
Calibrated Linearity
Guaranteed Monotonic to 13 Bits
±5V Supply Operation
Unipolar or Bipolar Outputs Swing to ±4.5V
Fast Output Settling (5µs to ±
1
⁄
2
LSB)
Double-Buffered Digital Inputs
Asynchronous Load Inputs Load Pairs of DAC Latches
–—
—–
Asynchronous C L R Input Resets DACs to Analog
Ground
o
Power-On Reset Circuit Resets DACs to Analog Ground
o
Microprocessor and TTL/CMOS Compatible
o
o
o
o
o
o
o
o
o
o
o
MAX547
________________Ordering Information
PART
MAX547ACQH
MAX547BCQH
MAX547ACMH
MAX547BCMH
MAX547BC/D
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
PIN-PACKAGE
44 PLCC
44 PLCC
44 Plastic FP
44 Plastic FP
Dice*
INL
(LSBs)
±2
±4
±2
±4
±4
________________________Applications
Automatic Test Equipment
Minimum Component-Count Analog Systems
Digital Offset/Gain Adjustment
Arbitrary Function Generators
Industrial Process Controls
Avionics Equipment
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
_______________________________________________________________Pin Configurations
AGNDCD
VOUTC
AGNDEF
VOUTD
REFCD
VOUTE
VOUTC
VOUTD
VSS
REFCD
AGNDCD
CLR
AGNDEF
REFEF
VSS
VOUTE
VOUTF
CLR
V
SS
V
SS
TOP VIEW
6
5
4
3
2
1
44 43 42 41 40
42
38
37
36
35
44
43
VOUTB
VOUTA
VDD
REFAB
AGNDAB
LDAB
LDCD
CS
WR
A2
A1
41
40
39
34
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
33
32
31
30
29
28
MAX547
27
26
25
24
23
VOUTG
VOUTH
VDD
REFGH
AGNDGH
GND
LDGH
LDEF
D0
D1
D2
VOUTB
VOUTA
V
DD
REFAB
AGNDAB
LDAB
LDCD
CS
WR
A2
A1
VOUTF
39
VOUTG
38
VOUTH
37
V
DD
36
REFGH
35
AGNDGH
34
GND
33
LDGH
32
LDEF
31
D0
30
D1
29
D2
7
8
9
10
11
12
13
14
15
16
17
18
19 20 21 22 23 24 25 26 27 28
MAX547
A0
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D12
D11
D10
D9
D8
D7
D6
REFEF
D5
D4
PLASTIC FP
PLCC
________________________________________________________________
Maxim Integrated Products
D3
A0
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Octal, 13-Bit Voltage-Output
DAC with Parallel Interface
MAX547
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ..............................................................-0.3V to +6V
V
SS
to GND...............................................................-6V to +0.3V
Digital Input Voltage to GND ......................-0.3V to (V
DD
+ 0.3V)
REF_ ..........................................(AGND_ - 0.3V) to (V
DD
+ 0.3V)
AGND_ .............................................(V
SS
- 0.3V) to (V
DD
+ 0.3V)
VOUT_ ........................................................................V
DD
to V
SS
Maximum Current into REF_ Pin .......................................±10mA
Maximum Current into Any Other Signal Pin ....................±50mA
Continuous Power Dissipation (T
A
= +70°C)
PLCC (derate 13.33mW/°C above +70°C)...................1067mW
Plastic FP (derate 11.11mW/°C above +70°C )..............889mW
Operating Temperature Ranges
MAX547–C–H.........................................................0°C to +70°C
MAX547–E–H ......................................................-40°C to +85°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 rat-
ings 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
= +5V, V
SS
= -5V, REF_ = 4.096V, AGND_ = GND = 0V, R
L
= 10kΩ, C
L
= 50pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STATIC PERFORMANCE—ANALOG SECTION
Resolution
Relative Accuracy
Differential Nonlinearity
Bipolar Zero-Code Error
Gain Error
Power-Supply Rejection Ratio
Load Regulation
REFERENCE INPUT
(Note 2)
Reference Input Range
Reference Input Resistance
ANALOG OUTPUT
Maximum Output Voltage
Minimum Output Voltage
DYNAMIC PERFORMANCE—ANALOG SECTION
Voltage-Output Slew Rate
Output Settling Time
Digital Feedthrough
Digital Crosstalk
DIGITAL INPUTS
(V
DD
= 5V ±5%)
Input Voltage High
Input Voltage Low
Input Current
Input Capacitance
2
VIH
VIL
IIN
CIN
V
IN
= 0V or V
DD
(Note 5)
2.4
0.8
1.0
10
V
V
µA
pF
To ±
1
⁄
2
LSB of full scale (Note 4)
3
5
5
5
V/µs
µs
nV-s
nV-s
V
DD
- 0.5
V
SS
+ 0.5
V
V
REF
RREF
(Notes 2, 3)
Each REF– pin (Note 3)
AGND
–
5
V
DD
V
kΩ
PSRR
∆Gain/∆V
DD
(Note 1)
∆Gain/∆V
SS
(Note 1)
R
L
=
∞
to 10kΩ
0.3
N
INL
DNL
MAX547A
MAX547B
Guaranteed monotonic
±5
13
±0.5
±0.5
±2
±4
±1
±20
Bits
LSB
LSB
LSB
LSB
%/%
LSB
±1
±8
±0.0025
±0.0025
_______________________________________________________________________________________
Octal, 13-Bit Voltage-Output
DAC with Parallel Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V, V
SS
= -5V, REF_ = 4.096V, AGND_ = GND = 0V, R
L
= 10kΩ, C
L
= 50pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER
POWER SUPPLIES
Positive Supply Range
Negative Supply Range
Positive Supply Current
Negative Supply Current
V
DD
V
SS
I
DD
I
SS
(Note 6)
(Note 6)
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
4.75
-5.25
14
11
5.25
-4.75
44
40
V
V
mA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX547
Note 1:
PSRR is tested by changing the respective supply voltage by ±5%.
Note 2:
For best performance, REF_ should be greater than AGND_ + 2V and less than V
DD
- 0.6V. The device operates with
reference inputs outside this range, but performance may degrade. For further information on the reference, see the
Reference and Analog-Ground Inputs
section in the
Detailed Description.
Note 3:
Reference input resistance is code dependent. See
Reference and Analog-Ground Inputs
section in the
Detailed
Description.
Note 4:
Typical settling time with 1000pF capacitive load is 10µs.
Note 5:
Guaranteed by design. Not production tested.
Note 6:
Guaranteed by supply-rejection test.
TIMING CHARACTERISTICS
(V
DD
= +5V, V
SS
= -5V, REF_ = 4.096V, AGND_ = GND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
––
—
CS Pulse Width Low
–—
–
WR Pulse Width Low
–—
—–
LD– Pulse Width Low
–—
—–
CLR Pulse Width Low
––
—
–—
–
CS Low to WR Low
––
—
–—
–
CS High to WR High
–—
–
Data Valid to WR Setup
–—
–
Data Valid to WR Hold
–—
–
Address Valid to WR Setup
–—
–
Address Valid to WR Hold
SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
t
10
CONDITIONS
MIN
50
50
50
100
0
0
50
0
10
0
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
_______________________________________________________________________________________
3
Octal, 13-Bit Voltage-Output
DAC with Parallel Interface
MAX547
__________________________________________Typical Operating Characteristics
(V
DD
= 5V, V
SS
= -5V, REF_ = 4.096V, AGND_ = GND = 0V, T
A
= +25°C, unless otherwise noted.)
RELATIVE ACCURACY
vs. DIGITAL INPUT CODE
MAX547-Fg TOC-5
RELATIVE ACCURACY vs.
REFERENCE VOLTAGE
MAX547-Fg TOC-11
SUPPLY CURRENT
vs. TEMPERATURE
15
SUPPLY CURRENT (mA)
10
5
0
-5
-10
-15
I
SS
I
DD
MAX547-Fg TOC-2
0.5
0.4
RELATIVE ACCURACY (LSB)
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
3072
6144
2048
4096
5120
7168
1024
3
2
20
RELATIVE ACCURACY (LSB)
1
0
-1
-2
8191
0
0
1
2
3
4
5
REFERENCE VOLTAGE (V)
-20
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
DIGITAL INPUT CODE (DECIMAL)
TOTAL HARMONIC DISTORTION
+ NOISE AT DAC OUTPUT
vs. REFERENCE FREQUENCY
MAX547-Fg TOC-4
TOTAL HARMONIC DISTORTION
+ NOISE AT DAC OUTPUT
vs. REFERENCE FREQUENCY
MAX547-Fg TOC-3
SETTLING TIME
vs. LOAD CAPACITANCE
MAX547-Fg TOC-9
0.100
0.090
0.080
THD + NOISE (%)
0.070
0.060
0.050
0.040
0.030
0.020
0.010
0
1
10
100
REF
–
= 2V
p-p
INPUT CODE = ALL 1s
0.100
0.090
0.080
THD + NOISE (%)
0.070
0.060
0.050
0.040
0.030
0.020
0.010
0
REF
–
= 4V
p-p
INPUT CODE = ALL 1s
1000
SETTLING TIME (µs)
1000
100
10
1
1
10
100
FREQUENCY (kHz)
0.01
0.1
1
10
100
LOAD CAPACITANCE (nF)
1000
FREQUENCY (kHz)
REFERENCE INPUT SMALL-SIGNAL
FREQUENCY RESPONSE
MAX547-Fg TOC-1
REFERENCE INPUT LARGE-SIGNAL
FREQUENCY RESPONSE
MAX547-Fg TOC-6
REFERENCE FEEDTHROUGH
-10
RELATIVE OUTPUT (dB)
-20
-30
-40
-50
-60
-70
SINE WAVE AT REF_
2V ±2V
MAX547-Fg TOC-7
6
0
RELATIVE OUTPUT (dB)
-6
-12
-18
-24
-30
-36
0.1
1
10
100
1000
SINE WAVE AT REF–
2V ±100mV
CODE ALL 1s
2
0
-2
RELATIVE OUTPUT (dB)
-6
-10
-14
-18
-22
SINE WAVE AT REF_
2V ±2V
CODE ALL 1s
0
-80
-90
0.1
1
10
100
1000
FREQUENCY (kHz)
10,000
0.1
1
10
100
1000
FREQUENCY (kHz)
10,000
FREQUENCY (kHz)
4
_______________________________________________________________________________________
Octal, 13-Bit Voltage-Output
DAC with Parallel Interface
____________________________Typical Operating Characteristics (continued)
(V
DD
= 5V, V
SS
= -5V, REF_ = 4.096V, AGND_ = GND = 0V, T
A
= +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX547-Fg TOC-10
MAX547
FULL-SCALE ERROR
vs. LOAD RESISTANCE
1.5
1.0
ERROR (LSB)
MAX547-Fg TOC-8
0
-10
-20
PSRR (dB)
-30
V
SS
-40
-50
-60
-70
-80
0.01
0.1
1
10
100
V
DD
V
DD
= V
SS
= 5V ±200mV
NO LOAD
2.0
NEGATIVE
FULL-SCALE
0.5
0
-0.5
-1.0
-1.5
-2.0
POSITIVE
FULL-SCALE
REF_ = 4.096V
1000
1
10
100
1000
FREQUENCY (kHz)
LOAD RESISTANCE (kΩ)
POSITIVE SETTLING TIME TO FULL-SCALE STEP
(ALL BITS OFF TO ALL BITS ON)
NEGATIVE SETTLING TIME TO FULL-SCALE STEP
(ALL BITS ON TO ALL BITS OFF)
DIGITAL
INPUTS
(5V/div)
DIGITAL
INPUTS
(5V/div)
OUTPUT
(1mV/div)
OUTPUT
(1mV/div)
2µs/div
REF– = 4.096V, C
L
= 100pF, R
L
= 5kΩ
2µs/div
REF– = 4.096V, C
L
= 100pF, R
L
= 5kΩ
DYNAMIC RESPONSE
(ALL BITS OFF, ON, OFF)
DIGITAL FEEDTHROUGH
(GLITCH IMPULSE)
DIGITAL
INPUTS
(5V/div)
+5V
0V
10mV
0V
-10mV
OUTPUT
(2V/div)
2µs/div
REF– = 4.096V, C
L
= 100pF, R
L
= 5kΩ
200ns/div
TOP: DIGITAL TRANSITION ON ALL DATA BITS
BOTTOM: DAC OUTPUT WITH WR HIGH 10mV/div
_______________________________________________________________________________________
5
京公网安备 11010802033920号
EEWORLD
