7545ARPFB [MAXWELL]
12-Bit Buffered Multiplying Digital to Analog Converter; 12位缓冲乘法数模转换器
| 型号： | 7545ARPFB |
| 厂家： | 
MAXWELL TECHNOLOGIES |
| 描述： | 12-Bit Buffered Multiplying Digital to Analog Converter |
| 文件： | 总9页 (文件大小：98K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
7545A
12-Bit Buffered Multiplying
Digital to Analog Converter
R FB
R
OUT1
12-BIT MULTIPYING
DAC
VREF
AGND
12
V DD
WR
CS
INPUT DATA LATCHES
DGND
12
DB11-DBO
FEATURES:
DESCRIPTION:
• RAD-PAK® patented shielding against natural space radia-
tion
• Total dose hardness:
Maxwell Technologies’ 7545A is a 12-bit CMOS-buffered mul-
tiplying DAC with internal data latches, which features a
greater than 100 krad (Si) total dose tolerance, depending
upon space mission. The 7545A features a WR pulse width of
100 ns which allows interfacing to a much wider range of fast
8-bit and 16-bit microprocessors. It is loaded by a single 12-bit
wide word under the control of the CS and WR inputs; tying
these control inputs low makes the input latches transparent
allowing unbuffered operation of the DAC. The 7545A is par-
ticularly suitable for single supply operations and applications
with wide temperature variations.
- > 100 krad (Si), depending upon space mission
• Excellent single event effects
- SEL : > 120 MeV/mg/cm2
TH
- SEUTH: > 120 MeV/mg/cm2 using all 1’s
• Package:
- 20 pin RAD-PAK® Flat Pack
- 20 pin RAD-PAK® DIP
• Low gain temperature coefficient:
- 5 ppm/°C typ.
• Fast interface timing
• Single +5 V to +15 V supply
Maxwell Technologies' patented RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
02.05.02 Rev 4
1
All data sheets are subject to change without notice
(858) 503-3300- Fax: (858) 503-3301- www.maxwell.com
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
TABLE 1. 7545A PINOUT DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1
2
OUT 1
AGND
DGND
DB 11
DB 10
DB 9
DB 8
DB 7
DB 6
DB 5
DB 4
DB 3
DB 2
DB 1
DB 0
CS
Output Current
Analog Ground
Digital Ground
Data Bit 11 (MSB)
Data Bit 10
3
4
5
6
Data Bit 9
7
Data Bit 8
8
Data Bit 7
9
Data Bit 6
10
11
12
13
14
15
16
17
18
19
20
Data Bit 5
Data Bit 4
Data Bit 3
Data Bit 2
Data Bit 1
Data Bit 0 (LSB)
Chip Select (Active Low)
Write (Active Low)
Digital Supply Voltage
Reference Input
Feedback Resistance
WR
V
DD
V
REF
RFB
TABLE 2. 7545A ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
MIN
MAX
UNIT
V
to DGND
--
--
-0.3
-0.3
--
17
V
V
DD
Digital Input Voltage to DGND
RFB, VREF to DGND
PIN1 to DGND
V
DD + 0.3
V
--
25
V
V
--
-0.3
-0.3
--
V
DD + 0.3
V
AGND to DGND
--
V
DD + 0.3
V
Power Dissipation to 75 °C
Thermal Impedance — Flat Package
Thermal Impedance — DIP Package
Operating Temperature
PD
ΘJC
ΘJC
--
450
mW
°C/W
°C/W
°C
--
6.08
6.04
125
--
-55
-65
Storage Temperature Range
TS
150
°C
02.05.02 Rev 4
All data sheets are subject to change without notice
2
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
TABLE 3. DELTA LIMITS
PARAMETER
VARIATION
IDD
±10%
TABLE 4. 7545A SPECIFICATIONS
(VDD = +5 V ±10%, T = -55 TO 125 °C UNLESS OTHERWISE NOTED)
A
TEST
SYMBOL
TEST CONDITION
MIN
MAX
UNIT
Resolution
RES
RA
12
-1/2
-1
--
1/2
1
Bits
Relative Accuracy
Differential Nonlinearity
Gain Error 1
LSB
LSB
LSB
DNL
12-Bit Monotonic TMIN to TMAX
A
DAC Register Loaded with 1111
1111 1111
-4
4
E
Gain Temperature Coefficient2
Power Supply Rejection
TCAE
PSRR
tSL
-5
-0.004
--
5
0.004
2
ppm/°C
%/%
µs
V
DD = 5%
Output Current Settling Time2
To 1/2LSB; OUT1 Load = 100Ω,
DAC Output Measured from Fall-
ing Edge of WR. CS = 0V
Feed through Error
FT
5 (typical)
mV p-p
Reference Input Resistance (Pin
19 to Ground)2
R
10
25
KΩ
IN
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Leakage Current
Digital Input Capacitance2
Output Capacitance2
V
2.4
--
--
0.8
10
20
70
200
--
V
V
IH
V
IL
I
V = 0 V or V
DD
-10
--
µA
pF
pF
IN
IN
C
DB0 - DB11; WR, CS
IN
COUT1
DB0 - DB11 = 0 V, WR, CS = 0V
--
DB0 - DB11 = V , WR, CS = 0V
--
DD
Chip Select to Write Setup Time3
Chip Select to Write Hold Time3
Write Pulse Width3
tCS
tCH
tWR
tDS
tCS > tWR, tCH > 0
380
0
nS
--
400
210
10
--
--
Data Setup Time3
--
Data Hold Time3
tDH
IDD
--
Supply Current from V
All Digital Inputs V or V
2
mA
µA
DD
IL
IH
All Digital Inputs 0 or V
--
500
DD
1. Measured using feedback resistor.
2. Guaranteed by design.
3. Not Tested.
02.05.02 Rev 4
All data sheets are subject to change without notice
3
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
TABLE 5. 7545A SPECIFICATIONS
(VDD = +15 V ±10%, T = -55 TO 125 °C UNLESS OTHERWISE NOTED)
A
TEST
SYMBOL
TEST CONDITION
MIN
MAX
UNIT
Relative Accuracy
Differential Nonlinearity
Gain Error 1
RA
-1/2
-1
1/2
1
LSB
LSB
LSB
DNL
12-Bit Monotonic TMIN to TMAX
A
DAC Register Loaded with 1111
1111 1111
-4
4
E
Gain Temperature Coefficient2
Power Supply Rejection
TCAE
PSRR
tSL
-5
-0.004
--
5
0.004
2
ppm/°C
%/%
µs
V
DD = 5%
Output Current Settling Time2
To 1/2LSB; OUT1 Load = 100Ω,
DAC Output Measured from Fall-
ing Edge of WR. CS = 0V
Feed through Error
FT
5 (typical)
mV p-p
Reference Input Resistance (Pin
19 to Ground)2
R
10
25
KΩ
IN
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Leakage Current
Digital Input Capacitance2
Output Capacitance2
V
13.5
--
--
1.5
10
15
70
150
--
V
V
IH
V
IL
I
V = 0 V or V
DD
-10
--
µA
pF
pF
IN
IN
C
DB0 - DB11; WR, CS
IN
COUT1
DB0 - DB11 = 0 V, WR, CS = 0V
--
DB0 - DB11 = V , WR, CS = 0V
--
DD
Chip Select to Write Setup Time
Chip Select to Write Hold Time
Write Pulse Width3
tCS
tCH
tWR
tDS
tCS > tWR, tCH > 0
95
0
nS
--
95
80
5
--
Data Setup Time3
--
Data Hold Time3
tDH
IDD
--
Supply Current from V
All Digital Inputs V or V
--
2
mA
µA
DD
IL
IH
All Digital Inputs 0 or V
--
100
DD
1. Measured using feedback resistor.
2. Guaranteed by design.
02.05.02 Rev 4
All data sheets are subject to change without notice
4
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
FIGURE 1. WRITE CYCLE TIMING DIAGRAM
FIGURE 2. MODE SELECTION TABLE
MODE SELECTION
WRITE MODE:
HOLD MODE:
CS and WR low, DAC responds to data Either CS or WR high, data bus (DB0 -
bus (DB0 - DB11) inputs
DB11) is locked out; DAC holds last data
present when WR or CS assumed high
state.
02.05.02 Rev 4
All data sheets are subject to change without notice
5
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
20 PIN RAD-PAK® DUAL IN LINE PACKAGE
DIMENSION
SYMBOL
MIN
NOM
MAX
A
b
--
0.202
0.018
0.230
0.026
0.065
0.018
1.060
0.310
0.014
0.045
0.008
--
b2
c
0.050
0.010
D
1.000
E
0.220
0.290
eA
eA/2
e
0.300 BSC
0.150 BSC
0.100 BSC
0.145
L
0.125
0.015
0.005
0.005
0.155
0.070
--
Q
0.045
S1
S2
N
0.025
--
--
20
D20-01
Note: All dimensions in inches
02.05.02 Rev 4
All data sheets are subject to change without notice
6
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
20 PIN RAD-PAK® FLAT PACKAGE
DIMENSION
SYMBOL
MIN
NOM
MAX
A
b
0.128
0.015
0.003
0.470
0.287
--
0.141
0.017
0.005
0.480
0.295
--
0.154
0.022
0.009
0.490
0.303
0.333
--
c
D
E
E1
E2
E3
e
0.155
0.030
0.160
0.068
0.050 BSC
0.380
0.034
0.007
20
--
L
0.350
0.026
0.005
0.390
0.045
--
Q
S1
N
F20-01
Note: All dimensions in inches
02.05.02 Rev 4
All data sheets are subject to change without notice
7
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
Important Notice:
These data sheets are created using the chip manufacturers published specifications. Maxwell Technologies verifies
functionality by testing key parameters either by 100% testing, sample testing or characterization.
The specifications presented within these data sheets represent the latest and most accurate information available to
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no
responsibility for the use of this information.
Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems
without express written approval from Maxwell Technologies.
Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech-
nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
02.05.02 Rev 4
All data sheets are subject to change without notice
8
©2001 Maxwell Technologies
All rights reserved.
12-Bit Buffered Multiplying
Digital to Analog Converter
7545A
Product Ordering Options
Model Number
7545A
RP
F
X
Option Details
Feature
S = Maxwell Class S
B = Maxwell Class B
Screening Flow
E = Engineering (testing @ +25°C)
I = Industrial (testing @ -55°C,
+25°C, +125°C)
D = Dual In-line Package (DIP)
F = Flat Pack
Package
RP = RAD-PAK® package
Radiation Feature
12-Bit Buffered Multiplying Digital
to Analog Converter
Base Product
Nomenclature
02.05.02 Rev 4
All data sheets are subject to change without notice
9
©2001 Maxwell Technologies
All rights reserved.
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