19-0257; Rev 3; 12/95
Octal, 13-Bit Voltage-Output DAC
with Parallel Interface
_____________________________Features
The MAX547 contains eight 13-bit, voltage-output digital-toanalog converters (DACs). On-chip precision output amplifiers 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 components. The MAX547 has four separate reference inputs;
each is connected to two DACs, providing different fullscale 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.
o
o
o
o
o
o
o
o
o
o
o
________________________Applications
Automatic Test Equipment
Minimum Component-Count Analog Systems
Digital Offset/Gain Adjustment
Arbitrary Function Generators
Industrial Process Controls
Avionics Equipment
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 ±1⁄2LSB)
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
________________Ordering Information
PIN-PACKAGE
INL
(LSBs)
PART
TEMP. RANGE
MAX547ACQH
0°C to +70°C
44 PLCC
±2
MAX547BCQH
MAX547ACMH
MAX547BCMH
MAX547BC/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
44 PLCC
44 Plastic FP
44 Plastic FP
Dice*
±4
±2
±4
±4
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
VOUTF
44 43 42 41 40
VOUTE
1
VSS
2
REFEF
AGNDEF
3
AGNDCD
4
CLR
VSS
REFCD
VOUTD
5
34
35
36
37
38
39
40
42
41
43
44
VOUTB
VOUTA
VDD
REFAB
AGNDAB
6
VOUTC
VOUTD
VSS
REFCD
AGNDCD
CLR
AGNDEF
REFEF
VSS
VOUTE
VOUTF
TOP VIEW
VOUTC
_______________________________________________________________Pin Configurations
1
33
2
32
VOUTG
VOUTH
VDD
REFGH
AGNDGH
GND
LDGH
LDEF
D0
D1
D2
31
4
30
5
29
6
28
MAX547
7
8
27
26
9
25
24
10
11
22
20
21
17
18
19
14
15
16
13
39 VOUTG
8
38 VOUTH
VDD
9
37 VDD
REFAB
10
36 REFGH
AGNDAB
11
LDAB
12
LDCD
13
33 LDGH
CS
14
32 LDEF
WR
15
31 D0
16
30 D1
A1
17
29 D2
35 AGNDGH
MAX547
34 GND
D3
D4
D5
D6
D7
D8
D9
D10
A0
PLASTIC FP
19 20 21 22 23 24 25 26 27 28
D11
18
D12
A0
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
12
23
7
VOUTA
A2
LDAB
LDCD
CS
WR
A2
A1
3
VOUTB
PLCC
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX547
_________________General Description