SPDAC87-CBI-V/B [SPECTRUM]
D/A Converter, 1 Func, Parallel, Word Input Loading, 3us Settling Time, CDIP24, HERMETICALLY SEALED CERAMIC, DIP-24;
| 型号： | SPDAC87-CBI-V/B |
| 厂家： | 
SPECTRUM MICROWAVE, INC. |
| 描述： | D/A Converter, 1 Func, Parallel, Word Input Loading, 3us Settling Time, CDIP24, HERMETICALLY SEALED CERAMIC, DIP-24 CD 转换器 |
| 文件： | 总4页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SP DAC87
Sipex Data Converter Line
Complete Monolithic 12-Bit
D/A Converter
FEATURES
• Single Chip Construction
• On-Board Output Amplifier
• Low Power Dissipation: 300 mW
• M onotonicity Guaranteed Over Temperature
• Guaranteed for Operation W ith 12V Supplies
• Buried Zener • Reference
•
1/2 LSB M ax Nonlinearity
PRODUCT DESCRIPTION
The SP DAC87 is a 12-bit digital-to-analog converter
with both a high stability voltage reference and
output amplifier combined on a single monolithic
chip.
High stability, SiCr thin film resistors are trimmed
with a fine resolution laser, resulting in lower
differential nonlinearity errors. A low noise, high
stability, subsurface Zenerdiode is used to produce a
reference voltage with excellent long term stability,
high external current capability and temperature
drift characteristics which challenge the best discrete
Zener references.
Innovative circuit design reduces the total power
consumption to 300 mW which not only improves
reliability but also improves long term stability.
The SP DAC87 incorporates a fully differential, non-
saturating precision current switching cell structure
which provides greatly increased immunity to supply
voltage variation. This same structure also reduces
nonlinearities due to thermal transients as the various
bits are switched; nearly all critical components
operate at constant power dissipation.
The SP DAC87 is available in a hermetically sealed
ceramic package and is specified for –55ºC to +125ºC
temperature operation. M IL-STD-883 processing is
available.
FUNCTIONAL DIAGRAM
(M SB) BIT
BIT
1
2
3
4
5
6
7
8
9
V
OUT
REF
1
24
23
REF
CONTROL
CIRCUIT
GAIN ADJUST
2
3
4
5
BIT
+V
S
22
21
20
19
BIT
COM M ON
SUM M ING JUNCTION
BIT
12-BIT
RESISTER
LADDER
NETW ORK
AND
5k
5k
20V RANGE
10V RANGE
BIPOLAR OFFSET
REF INPUT
BIT
6
7
8
BIT
18
17
CURRENT
SW ITCHES
6.3k
BIT
BIT
9
16
15
–
BIT 10
BIT 11
V
10
OUT
+
– V
S
11
12
14
13
(LSB) BIT 12
NC
165 Cedar Hill Street, Marlborough, MA 01752 Tel: 508.485.6350 Fax: 508.485.5168
www.satconelectronics.com
SPECIFICATIO NS
ABSOLUTE M AXIM UM RATINGS
+V to Power Ground
0V to +18V
0V to –18V
–1.0V to +7V
12V
12V
12V
24V
s
–V to Power Ground
s
Digital Input (Pins 1 to 12) to Power Ground
Ref In to Reference Ground
Bipolar Offset to Reference Ground
10V Span R to Reference Ground
20V Span R to Reference Ground
Ref Out
Indefinite Short to Power
Ground or +Vs
(TA = +25ºC, rated power supplies unless otherwise noted.)
M ODEL
SP DAC87
M IN
TYP
M AX
12
UNITS
DIGITAL INPUT
Binary - CBI
Bits
Logic Levels (TTL Compatible)
V
V
(Logic " 1" )
(Logic " 0" )
(V = 5.5V)
+2.0
0
+5.5
+0.8
250
100
V
V
µA
µA
IH
IL
I
I
IH IH
(V = 0.8V)
IH IL
TRANSFER CHARACTERISTICS ACCURACY
Linearity Error @ +25º
1/2
3/4
3/4
1
0.2
0.1
LSB1
LSB
LSB
LSB
% FSR3
% FSR3
T @T
to T
max
1/2
A
min
Differential Linearity Error @ +25ºC
T @T to T
A
min
Gain Error2
Offset Error2
max
0.1
0.05
Temperature Range for Guaranteed
M onotonicity
–55
+125
30
ºC
DRIFT (T
to T
)
min
max
Total Bipolar Drift, max (includes gain,
offset, and linearity drifts)
ppm of FSR/ºC
4
Total Error (T
Unipolar
Bipolar
to T
)
max
min
0.18
0.14
0.3
0.24
% of FSR
% of FSR
Gain
Including Internal Reference
Excluding Internal Reference
Unipolar Offset
20
10
3
ppm of FSR/ºC
ppm of FSR/ºC
ppm of FSR/ºC
ppm of FSR/ºC
Bipolar Offset
10
CONVERSION SPEED
Settling Time to 0.01% of FSR for
FSR change (2 k Ohm/500 pF load)
with 10 k Feedback
3
2
1
4
3
µs
µs
µs
with 5 k Feedback
For LSB Change
Slew Rate
10
V/µs
(TA = +25ºC, rated power supplies unless otherwise noted.)
M ODEL
SP DAC87
M IN
TYP
M AX
UNITS
ANALOG OUTPUT
Ranges - CBI
2.5. 5, 10
+5,+10
V
Output Current
5
mA
Output Impedance (dc)
Short Circuit Current
Internal Reference Voltage (Vr)
Output Impedance
0.05
40
+6.37
mA
V
+6.23
+6.3
1.5
M ax External Current6
Tempco of Drift
+2.5
10
mA
ppm of V /ºC
R
POW ER SUPPLY SENSITIVITY
15V 10% , 5V supply when applicable
12V 5%
0.002
0.002
% of FSR/% V
% of FSR/% V
s
s
POW ER SUPPLY REQUIREM ENTS
Rated Voltages
Range
Analog Supplies
Logic Supplies
Supply Drain
15V
11.47
+4.5
16.5
+5.5
V
V
+12, +15V
–12, –15V
5
14
10
20
mA
mA
TEM PERATURE RANGE
Specification
Operating
–55
–55
–55
+125
+125
+150
ºC
ºC
ºC
Storage
NOTES
1. Least Significant Bit.
2. Adjustable to zero with external trim potentiometer.
3. FSR means " Full Scale Range" and is 20V for the 10V range and 10V for the 5V range.
4. Gain and offset errors adjusted to zero at +25ºC.
5. C = 0, see Figure 1.
F
6. M aximum with no degradation of specifications, must be a constant load.
7. A minimum of 12.3V is required for a 10V full scale output and 11.4V is required for all other voltage ranges.
Specifications subject to change without notice.
ORDERING INFORM ATION
M ODEL LINEARITY
ERROR
TEM PERATURE
RANGE
SCREENING
SP DAC87- 1/2 LSB– 55º C to +125º C M IL-STD-883C
CBI-V/B
Q
D
A
J
L
S
B
G
H
E
F
C
SYM BOL
INCHES
.180
.018
.012
1.27
.535
.615
.070
.110
.225
.150
.045
.090
15º
A
B
C
D
E
F
G
H
J
L
Q
S
a
Consult factory for application
information.
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