
AD568
REV. A
–3–
ORDERING GUIDE
Linearity
Error Max
@ 25
8
C
Voltage
Gain T.C.
Max ppm/
8
C
Temperature
Range
8
C
Model
l
Package Option
2
AD568JQ
AD568KQ
AD568SQ
24-Lead Cerdip (Q-24)
24-Lead Cerdip (Q-24)
24-Lead Cerdip (Q-24)
0 to +70
0 to +70
–55 to +125
±
1/2
±
1/4
±
1/2
±
50
±
30
±
50
NOTES
1
For details on grade and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices
Military Products Databook or current AD568/883B data sheet.
2
Q = Cerdip.
Definitions
LINEARITY ERROR (also called INTEGRAL NONLINEAR-
ITY OR INL): Analog Devices defines linearity error as the
maximum deviation of the actual analog output from the ideal
output (a straight line drawn from 0 to FS) for any bit combina-
tion expressed in multiples of 1 LSB. The AD568 is laser
trimmed to 1/4 LSB (0.006% of FS) maximum linearity error at
+25
°
C for the K version and 1/2 LSB for the J and S versions.
DIFFERENTIAL LINEARITY ERROR (also called DIFFER-
ENTIAL NONLINEARITY or DNL): DNL is the measure of
the variation in analog value, normalized to full scale, associated
with a 1 LSB change in digital input code. Monotonic behavior
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD568 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
requires that the differential linearity error not exceed 1 LSB in
the negative direction.
MONOTONICITY: A DAC is said to be monotonic if the out-
put either increases or remains constant as the digital input
increases.
UNIPOLAR OFFSET ERROR: The deviation of the analog
output from the ideal (0 V or 0 mA) when the inputs are set to
all 0s is called unipolar offset error.
BIPOLAR OFFSET ERROR: The deviation of the analog out-
put from the ideal (negative half-scale) when the inputs are set
to all 0s is called bipolar offset error.
18
6
7
8
9
10
11
12
1
2
3
4
5
19
20
23
24
13
14
17
2X
4X
MSB
LSB
PNP
CURRENT
SOURCES
1.4V
GAP
REF
THCONTROL
THCOMMON
LADDER
SWITCPNP
DIFFUS(10 - 20
)
THIN-FILM R-2R LADDER
(100 - 200
)
BIPOLAR
GENERATOR
BURIED
ZENER
REFERENCE
21
22
200
ANALOG
V
CC
I
OUT
LOAD RESISTOR
(R
L
)
BIPOLAR
OFFSET (I
BPO
)
10V SPAN
RESISTOR
REFERENCE
COMMON
1k
15
16
10V SPAN
RESISTOR
I
OUT
I
OUT
AD568
V
EE
Figure 1. Functional Block Diagram
ABSOLUTE MAXIMUM RATINGS
1
V
CC
to REFCOM . . . . . . . . . . . . . . . . . . . . . . . . 0 V to +18 V
V
EE
to REFCOM . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to –18 V
REFCOM to LCOM . . . . . . . . . . . . . . . . . +100 mV to –10 V
ACOM to LCOM . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
100 mV
THCOM to LCOM . . . . . . . . . . . . . . . . . . . . . . . . . .
±
500 mV
SPANs to LCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
12 V
I
BPO
to LCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
5 V
I
OUT
to LCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V to V
TH
Digital Inputs to THCOM . . . . . . . . . . . . . –500 mV to +7.0 V
Voltage Across Span Resistor . . . . . . . . . . . . . . . . . . . . . . 12 V
V
TH
to THCOM . . . . . . . . . . . . . . . . . . . . . . –0.7 V to +1.4 V
Logic Threshold Control Input Current . . . . . . . . . . . . . 5 mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mW
Storage Temperature Range
Q (Cerdip) Package . . . . . . . . . . . . . . . . . –65
°
C to +150
°
C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175
°
C
Thermal Resistance
θ
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
°
C/W
θ
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
°
C/W
1
Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PIN CONFIGURATION