475
HA17408P
8-Bit Multiplying Digital-to-Analog Converter
Description
The HA17408P is an 8-bit monolithic D/A converter that incorporates a reference current amplifier, an R-2R
resistor ladder, and eight high-speed current switches.
Circuit designers can set the maximum output current to match the needs of their applications by setting the
reference voltage and selecting a resistor value.
The reference current is distributed to the current value for each bit by the R-2R resistor ladder, and thus the
maximum output current is 255/256 times the reference current. For example, the largest output current that
can be acquired for a reference input current of 2.0 mA is 1.992 mA.
The HA17408P can be used in a wide range of applications including CRT displays, stepping motor control,
programmable power supplies, audio equipment, and attenuators.
Features
A linearity of 0.19% ( 1/2 LSB) is guaranteed.
Short centering time (250 ns typical) for rapid conversions
Low power dissipation: 157 mW typical
Compatible with TTL and CMOS logic
Standard supply voltages of V
CC
= +5.0 V, V
EE
= 5.0 V and = 15.0 V
Wide output voltage range: +0.5 to 5.0 V
HA17408P
477
Absolute Maximum Ratings (Ta = 25C)
Item
Symbol
Rated Value
Unit
Power-supply voltage
V
CC
5.5
V
V
EE
16.5
V
Digital input voltage
V
5
to V
12
0 to +5.5
V
Output voltage
V
O
0.5 to 5.2
V
Reference current
I
14
5.0
mA
Reference amplifier input voltage range
V
REF
V
CC
, V
EE
V
Allowable power dissipation
P
T
625
mW
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
55 to +125
C
Electrical Characteristics (V
CC
= 5.0 V, V
EE
= 15 V, Iref = 2 mA, Ta = 25C)
Item
Symbol Min
Typ
Max
Unit
Test Condition
Relative error
E
R
--
--
0.19
%FS
Settling time
( 1/2 LSB)
t
s
--
250
--
ns
All bits OFF
ON
Transmission
delay time
t
PLH
, t
PHL
--
30
100
ns
Maximum output
current drift
T
CIO
--
20
--
ppm/C
Digital input level
V
IH
2.0
--
--
V
V
IL
--
--
0.8
V
Digital input
I
IH
--
0
0.04
mA
V
IH
= 5.0 V
current
I
IL
0.8
0.002 --
mA
V
IL
= 0.8 V
Reference input
bias current
I
15
3.0
1.0
--
A
Output current
I
OR
0
2.0
2.1
mA
V
EE
= 5.0 V
range
0
2.0
4.2
mA
V
EE
= 7.0 to 15 V
Output current
I
O
1.9
1.99
2.1
mA
Vref = 2.000 V, R
14
= 1.000
I
O
(min)
--
0
4.0
A
All bits low
Output voltage
V
O
0.6
--
+0.5
V
V
EE
= 5 V
range
5.0
--
+0.5
V
V
EE
< 10 V
Reference
STIref
--
4.0
--
mA/s
current slew rate
HA17408P
478
Electrical Characteristics (V
CC
= 5.0 V, V
EE
= 15 V, Iref = 2 mA, Ta = 25C) (cont)
Item
Symbol Min
Typ
Max
Unit
Test Condition
Current drain
I
CC
--
1.9
14
mA
I
EE
13
5.8
--
mA
Power-supply
V
CC
4.5
5.0
5.5
V
voltage
V
EE
16.5
15
4.5
V
Power dissipation
P
T
--
34
136
mW
All bits
V
EE
= 5.0 V
--
97
265
mW
low
V
EE
= 15 V
--
34
--
mW
All bits
V
EE
= 5.0 V
--
97
--
mW
high
V
EE
= 15 V
Settling Time Test Circuit
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