MP7523/XRD7523
...the analog plus company
TM
15 V CMOS
Multiplying 8-Bit
Digital-to-Analog Converter
January 1996-2
FEATURES
•
•
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•
•
•
•
Full Four-Quadrant Multiplying
Low Feedthrough: 1/2 LSB @ 200 kHz
Fast Settling: 100 ns (typ.)
Low Power Dissipation
Low Cost
5 V/15 V Operation
Buffered Version: MP7524/XRD7524
APPLICATIONS
•
•
•
•
•
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Battery Operated Equipment
Low Power, Ratiometric A/D Converters
Digitally Controlled Gain Circuits
Digitally Controlled Attenuators
CRT Character Generation
Low Noise Audio Gain Control
GENERAL DESCRIPTION
The MP7523/XRD7523 is a low cost multiplying Digital-to-
Analog Converter. The device uses an advanced thin-film-on-
CMOS technology to provide 8-bit resolution with accuracy to
10-bits and very low power dissipation.
The MP7523/XRD7523’s excellent multiplying characteris-
tics and low cost allow it to be used in a wide ranging field of ap-
plications such as: low noise audio gain control, CRT character
generation, motor speed control, digitally controlled attenuators,
etc.
SIMPLIFIED BLOCK DIAGRAM
V
DD
2R
V
REF
4R
4R
4R
4R
2R
2R
R
FB
4R
4R
4R
R
I
OUT1
I
OUT2
2 to 3 Decoder
Switch Drivers & Switches
R = 10k
BIT 1
MSB
BIT 8
LSB
3 Segment D/A Converter with Termination to DGND
Logical “1” at Digital Input Steers Current to I
OUT1
Rev. 3.00
E1996
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
z
(510) 668-7000
z
(510) 668-7010
MP7523/XRD7523
ORDERING INFORMATION
Package
Type
Plastic Dip
Plastic Dip
SOIC (Jedec, 0.300”)
SOIC (Jedec, 0.300”)
SOIC (Jedec, 0.150”)
SOIC (Jedec, 0.150”)
SOP (EIAJ)
SOP (EIAJ)
Temperature
Range
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
–40 to +85
°
C
Part No.
MP7523JN
MP7523KN
MP7523JS
MP7523KS
XRD7523AID-J
XRD7523AID-K
XRD7523AIK-J
XRD7523AIK-K
INL
(LSB)
1/2
1/4
1/2
1/4
1/2
1/4
1/2
1/4
DNL
(LSB)
1
1
1
1
1
1
1
1
Gain Error
(% FSR)
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
PIN CONFIGURATIONS
I
OUT1
I
OUT2
GND
(MSB) BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
R
FB
V
REF
V
DD
N/C
N/C
BIT 8 (LSB)
BIT 7
BIT 6
I
OUT1
I
OUT2
GND
(MSB) BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
R
FB
V
REF
V
DD
N/C
N/C
BIT 8 (LSB)
BIT 7
BIT 6
16 Pin PDIP (0.300”)
16 pin SOIC (Jedec, 0.300”)
16 pin SOIC (Jedec, 0.150”)
16 pin SOP (EIAJ, 5.5 mm)
PIN OUT DEFINITIONS
PIN NO.
1
2
3
4
5
6
7
8
NAME
I
OUT1
I
OUT2
GND
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
DESCRIPTION
Current Output 1
Current Output 2
Ground
Bit 1 (MSB)
Bit 2
Bit 3
Bit 4
Bit 5
PIN NO.
9
10
11
12
13
14
15
16
NAME
BIT 6
BIT 7
BIT 8
N/C
N/C
V
DD
V
REF
R
FB
Bit 6
Bit 7
Bit 8
No Connection
No Connection
Positive Power Supply
Reference Input Voltage
Internal Feedback Resistor
DESCRIPTION
Rev. 3.00
2
MP7523/XRD7523
ELECTRICAL CHARACTERISTICS
(V
DD
= + 15 V, V
REF
= +10 V unless otherwise noted)
25
°
C
Typ
Tmin to Tmax
Min
Max
Parameter
STATIC PERFORMANCE
1
Resolution (All Grades)
Integral Non-Linearity
(Relative Accuracy)
J
K
Monotonicity
Differential Non-Linearity
J
K
Gain Error
J
K
Power Supply Rejection Ratio
J
K
Output Leakage Current (Pin 1)
J
K
Output Leakage Current (Pin 2)
J
K
REFERENCE INPUT
Input Resistance
DIGITAL INPUTS
Logical “1” Voltage
Logical “0” Voltage
Input Leakage Current
ANALOG OUTPUTS
Output Capacitance
2
Symbol
Min
Max
Units
Test Conditions/Comments
N
INL
8
8
Bits
LSB
Best Fit Straight Line
(Max INL – Min INL) / 2
+1/2
+1/4
+1/2
+1/4
Guaranteed over temp
DNL
+1
+1
GE
+1.5
+1
+1
+1.8
LSB
All grades monotonic over full
temperature range.
%
Using Internal R
FB
Digital Inputs = V
INH
|∆Gain/∆V
DD
| ∆V
DD
= + 5%
Digital Inputs = V
INH
PSRR
+200
+300
ppm/%
I
OUT1
+50nA
+200nA
nA
Digital Inputs = V
INL
I
OUT2
+50nA
+200nA
nA
Digital Inputs = V
INH
R
IN
5
20
5
20
kΩ
V
OUT1
= V
OUT2
= 0 V
V
IH
V
IL
I
LKG
14.5
0.5
+1
14.5
0.5
+1
V
V
µA
C
OUT1
C
OUT1
C
OUT2
C
OUT2
100
30
30
100
100
30
30
100
pF
pF
pF
pF
DAC Inputs all 1’s
DAC Inputs all 0’s
DAC Inputs all 1’s
DAC Inputs all 0’s
Rev. 3.00
3
MP7523/XRD7523
ELECTRICAL CHARACTERISTICS (CON’T)
Parameter
POWER SUPPLY
Functional Voltage Range
2
Supply Current
NOTES:
1
2
3
4
Symbol
Min
25
°
C
Typ
Max
Tmin to Tmax
Min
Max
Units
Test Conditions/Comments
V
DD
I
DD
5
16
1.6
5
16
1.6
V
mA
All digital inputs = 0 V or all = 15 V
Full Scale Range (FSR) is 10V.
Guaranteed but not production tested.
Digital input levels should not go below ground or exceed the positive supply voltage, otherwise damage may occur.
Specified values guarantee functionality. Refer to other parameters for accuracy.
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS (T
A
= +25
°
C unless otherwise noted)
1, 2
V
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17 V
Digital Input Voltage to GND GND –0.5 to V
DD
+0.5 V
I
OUT1
, I
OUT2
to GND . . . . . . . . . . . . . . . . . –0.5 to 6.5 V
V
REF
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +25 V
V
RFB
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +25 V
Package Power Dissipation Rating to 75°C
CDIP, PDIP, SOIC . . . . . . . . . . . . . . . . . . . . 800mW
Derates above 75°C . . . . . . . . . . . . . . . . . 11mW/°C
Storage Temperature . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 seconds) . +300°C
NOTES:
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 at or above this specification is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
2
Any input pin which can see a value outside the absolute maximum ratings should be protected by Schottky diode clamps
(HP5082-2835) from input pin to the supplies.
APPLICATION NOTES
Refer to Section 8 in the 1995 Data Acquisition Products databook for Applications Information
Rev. 3.00
4
MP7523/XRD7523
16 LEAD PLASTIC DUAL-IN-LINE
(300 MIL PDIP)
16
1
D
9
8
E
1
E
A
2
Seating
Plane
A
L
A
1
B
e
B
1
α
e
B
C
INCHES
SYMBOL
A
A
1
A
2
B
B
1
C
D
E
E
1
e
e
B
L
α
MIN
0.145
0.015
0.115
0.014
0.030
0.008
0.745
0.300
0.240
MAX
0.210
0.070
0.195
0.024
0.070
0.014
0.840
0.325
0.280
MILLIMETERS
MIN
3.68
0.38
2.92
0.36
0.76
0.20
18.92
7.62
6.10
MAX
5.33
1.78
4.95
0.56
1.78
0.38
21.34
8.26
7.11
0.100 BSC
0.310
0.115
0°
0.430
0.160
15°
2.54 BSC
7.87
2.92
0°
10.92
4.06
15°
Rev. 3.00
5
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