Rainbow Electronics MAX547 User Manual
General description, Applications, Features
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MAX547
Octal, 13-Bit Voltage-Output DAC
with Parallel Interface
________________________________________________________________
Maxim Integrated Products
1
44
1
2
3
4
40
41
42
43
5
21
24
26
25
27 28
22 23
19 20
8
9
10
11
12
13
14
15
16
17
29
30
31
32
33
34
35
36
37
38
A1
D11
VOUTD
V
SS
REFCD
AGNDCD
AGNDEF
REFEF
V
SS
VOUTE
VOUTF
D12
D9
D10
D7
D8
D5
D6
D3
D4
VOUTH
V
DD
REFGH
AGNDGH
GND
LDGH
LDEF
D0
D1
D2
A2
WR
CS
LDCD
LDAB
AGNDAB
REFAB
V
DD
VOUTA
7
39
VOUTG
VOUTB
6
18
VOUTC
A0
CLR
MAX547
PLCC
TOP VIEW
VOUTH
VDD
REFGH
AGNDGH
GND
D0
D1
D2
VOUTG
LDEF
LDGH
VOUTA
VDD
REFAB
AGNDAB
LDAB
WR
A2
A1
VOUTB
CS
LDCD
VOUTD
V
SS
AGNDEF
REFCD
AGNDCD
CLR
VOUTC
REFEF
V
SS
VOUTF
VOUTE
D12
D11
D7
D10
D9
D8
A0
D6
D5
D3
D4
PLASTIC FP
22
21
20
19
18
17
16
15
14
13
12
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
11
10
9
8
7
6
5
4
3
2
1
MAX547
19-0257; Rev 3; 12/95
_________________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 (
–
L
—
D
—
_
–
) input transfers data from the
input latch to the DAC latch. The four
–
L
—
D
—
_
–
inputs each control
two DACs, and all DAC latches can be updated simultane-
ously by asserting all
–
L
—
D
—
_
–
pins. An asynchronous clear (
–
C
—
L
—
R
–
)
input resets the output of all eight DACs to AGND_. Asserting
–
C
—
L
—
R
–
resets both the DAC and the input latch to bipolar zero
(1000hex). On power-up, reset circuitry performs the same
function as
–
C
—
L
—
R
–
. All logic inputs are TTL/CMOS compatible.
The MAX547 is available in 44-pin plastic quad flat pack
and 44-pin PLCC packages.
________________________Applications
Automatic Test Equipment
Minimum Component-Count Analog Systems
Digital Offset/Gain Adjustment
Arbitrary Function Generators
Industrial Process Controls
Avionics Equipment
_____________________________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
♦
Power-On Reset Circuit Resets DACs to Analog Ground
♦
Microprocessor and TTL/CMOS Compatible
________________Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
MAX547ACQH
MAX547BCQH
MAX547ACMH
0°C to +70°C
0°C to +70°C
0°C to +70°C
44 PLCC
44 PLCC
44 Plastic FP
MAX547BCMH
0°C to +70°C
44 Plastic FP
MAX547BC/D
0°C to +70°C
Dice*
_______________________________________________________________Pin Configurations
±2
±4
±2
±4
±4
PART
TEMP. RANGE
PIN-PACKAGE
INL
(LSBs)