SP7545
Corporation
SIGNAL PROCESSING EXCELLENCE
12–Bit, Buffered Multiplying DAC
s
±1.0
LSB Relative Accuracy Over
Temperature
s
Monotonic to 12–Bits Over
Temperature
s
High Stability, Segmented Architecture
s
Proprietary, Low TCR Thin–Film
Resistor Technology
s
Operates With +5V to +15V Power
Supplies
s
On-Board, Level–Triggered Latches
s
2kVESD Protection on all Digital
Inputs
DESCRIPTION…
The
SP7545
is a low–cost, high stability 12–bit CMOS multiplying DAC with on–board data
latches. The
SP7545
is constructed using a proprietary low–TCR thin–film process that
requires no laser–trimming to achieve 12–bit performance. With no laser–trimming, inherent
high stability, and a segmented (decoded) DAC architecture, the
SP7545
retains its
performance over time and temperature. The
SP7545
is available for use in commercial and
industrial temperature ranges. It is available in 20–pin plastic DIP and PLCC packages.
V
DD
[18]
D
11
(MSB) [4]
D
10
[5]
D
9
[6]
D
8
[7]
D
7
[8]
D
6
[9]
D
5
[10]
D
4
[11]
D
3
[12]
AGND [2]
D
2
[13]
D
1
[14]
D
0
(LSB) [15]
12–BIT
DAC
REGISTER
12–BIT
DAC
I
O1
[1]
R
FB
[20]
V
REF
[19]
GND [3]
Corporation
175
SIGNAL PROCESSING EXCELLENCE
ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C unless otherwise noted.)
These are stress ratings only and functional operation of the device
at these or any other above those indicated in the operation
sections of the specifications below is not implied. Exposure to
absolute maximum rating conditions for extended periods of time
may affect reliability.
V
DD
to GND .................................................................. –0.3V, +17V
Digital Input Voltage to GND ................................. –0.3V, V
DD
+0.3V
V
REF
or V
RFB
to GND ................................................................
±25V
Output Voltage (Pin 1, Pin 2) ................................ –0.3V, V
DD
+0.3V
Power Dissipation (Any Package to +75°C) ........................ 450mW
Derates above 75°C by ...................................................... 6mW/°C
Dice Junction Temperature ................................................. +150°C
Storage Temperature ............................................ –65°C to +150°C
Lead Temperature (Soldering, 60 seconds) ........................ +300°C
SPECIFICATIONS
(T
A
=25°C; V
DD
=+5V or +15V as noted; V
REF
= +10V; I
O1
= AGND = GND = 0V; unipolar unless otherwise noted.)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Non-Linearity
–J
–K
Differential Non-Linearity
–J
–K
Gain Error
–J
–K
MIN.
12
TYP.
MAX.
UNIT
Bits
CONDITIONS
±2.0
±1.0
±4.0
±1.0
±20
±25
±10
±15
±10
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
nA
Output Leakage Current
AC PERFORMANCE CHARACTERISTICS
Propagation Delay
Current Settling Time
Output Capacitance
50
25
Glitch Energy
Multiplying Feedthrough Error
STABILITY
Gain Error TC
Integral Non-Linearity TC
Differential Non-Linearity TC
Power Supply Rejection
250
2.0
0.2
±1.0
±0.1
±0.1
±0.002
300
250
2.0
200
200
70
70
ns
ns
µs
pF
pF
pF
pF
nV-s
mV
P-P
mV
P-P
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
%/%
%/%
KΩ
ppm/°C
Volts
Note 6
Note 5; 11-bit relative accuracy
Note 5; 12-bit relative accuracy
Note 7
Note 5; monotonic to 12-bits
Note 5; monotonic to 12-bits
Note 16
V
DD
= +5V; Note 5
V
DD
= +15V
V
DD
= +5V
V
DD
= +15V
At I
O1
(Pin 1); Note 5 and 17
Output Amplifier HOS-050;
Note 10
V
DD
= +5V; Note 11
V
DD
= +15V; Note 11
Full scale transition; Note 12
WR, CS = 0V; data inputs V
DD
Note 5; data inputs V
DD
Data inputs 0V
Note 5; data inputs 0V
Note 13
Measured at output I
O1
; Note 14
Measured at output I
O1
; Note 15
±2.0
±2.0
±1.0
±1.0
±1.0
±1.0
±0.01
±0.02
Note 5
Note 5
Note 5
%/0.005% change in power
supply voltage
Note 5
Pin 19 to GND
Note 5 and 8
REFERENCE INPUT
Input Resistance
Input Resistance TC
Voltage Range
7
10
±150
15
±25
176
Corporation
SIGNAL PROCESSING EXCELLENCE
SPECIFICATIONS
(continued)
(T
A
=25°C; V
DD
=+5V, V
REF
= +10V; I
O1
= AGND = GND = 0V; unipolar unless otherwise noted.)
PARAMETER
DIGITAL INPUTS
Logic Levels
V
IH
MIN.
TYP.
MAX.
UNIT
CONDITIONS
2.4
13.5
V
IL
-0.3
-0.3
Input Current
Input Capacitance
Bits 1—12
WR, CS
Coding
Unipolar
Bipolar
POWER REQUIREMENTS
Supply Current
V
DD
2.4
V
DD
13.5
0.8
0.8
1.5
1.5
±1.0
±10
5
20
Binary
Offset Binary
2.0
2.0
0.5
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
µA
µA
pF
pF
V
DD
= +5V
V
DD
= +5V; Note 5
V
DD
= +15V
V
DD
= +15V; Note 5
V
DD
= +5V
V
DD
= +5V; Note 5
V
DD
= +15V
V
DD
= +15V; Note 5
V
IN
= 0V or V
DD
Note 5 and 9
V
IN
= 0; Note 5 and 8
mA
mA
mA
mA
All digital inputs V
IL
or V
IH
Note 5; all digital inputs
V
IL
or V
IH
Note 18
Note 5 and 18
ENVIRONMENTAL AND MECHANICAL
Operating Temperature
Commercial
0
+70
Industrial
-40
+85
Storage Temperature
-65
+150
Package
20–pin Plastic DIP
20–pin Plastic LCC
°C
°C
°C
Notes and Cautions:
1.
Do not apply voltages higher than V
DD
or less than GND potential on any terminal other than V
REF
or V
RFB
.
2.
The digital inputs are diode-clamp protected against ESD damage. However, permanent damage may
occur on unprotected units from high-energy electrostatic fields. Keep units in conductive foam at all
times until ready to use.
3.
Use proper anti-static handling procedures.
4.
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 these specifications is not
implied. Exposure to the above maximum rated conditions for extended periods may affect device
reliability.
5.
From T
MIN
to T
MAX
.
6.
End-point linearity
7.
Differential Non-linearity is the deviation of an output step from the theoretical value of 1 LSB for any two
adjacent digital input codes.
8.
Guaranteed by design, but not production tested.
9.
Logic inputs are MOS gates. I
IN
typically is less than 1nA @ 25°C.
10.
AC performance characteristics are included for design guidance only and are subject to sample testing
only.
11.
R
L
= 100Ω, C
EXT
= 13pF; all data inputs 0V to V
DD
or V
DD
to 0V; from 50% digital input change to 90% of
final analog output.
12.
Settling to
±0.01%
FSR (strobed); all data inputs 0V to V
DD
or V
DD
to 0V.
13.
V
REF
= 0V, DAC register alternatively loaded with all 0’s and all 1’s.
14.
V
REF
= 20V
P-P
; F = 10kHz sinewave.
15.
V
REF
= 20V
P-P
; F = 1kHz sinewave.
16.
Measured using internal feedback resistor with DAC loaded with all 1’s.
17.
All digital inputs = 0V.
18.
All digital inputs 0V or V
DD.
Corporation
177
SIGNAL PROCESSING EXCELLENCE
ORDERING INFORMATION
Model
Integral Linearity
Package
0°C to +70°C Operating Temperature
SP7545JCN
............................................................................
±2LSB
.................................................................................. 20–pin, 0.3" Plastic DIP
SP7545JCL
.............................................................................
±2LSB
................................................................................................... 20–pin PLCC
SP7545KCN
............................................................................
±1LSB
.................................................................................. 20–pin, 0.3" Plastic DIP
SP7545KCL
............................................................................
±1LSB
................................................................................................... 20–pin PLCC
–40°C to +85°C Operating Temperature
SP7545JIN
..............................................................................
SP7545JIL
..............................................................................
SP7545KIN
.............................................................................
SP7545KIL
..............................................................................
±2LSB
±2LSB
±1LSB
±1LSB
.................................................................................. 20–pin, 0.3" Plastic DIP
................................................................................................... 20–pin PLCC
.................................................................................. 20–pin, 0.3" Plastic DIP
................................................................................................... 20–pin PLCC
180
Corporation
SIGNAL PROCESSING EXCELLENCE
单片机
