7545A MAXWELL | Alldatasheet
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All data sheets are subject to change without notice (858) 503-3300- Fax: (858) 503-3301- www.maxwell.com 12-Bit Buffered Multiplying 7545A ©2001 Maxwell Technologies All rights reserved. Digital to Analog Converter
02.05.02 Rev 4
R WR CS FEATURES:
- R AD-PAK® patented shielding against natural space radia- tion Total dose hardness: - > 100 krad (Si), depending upon space mission Excellent single event effects - SELTH: > 120 MeV/mg/cm2 - 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 DESCRIPTION: 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. Maxwell Technologies' patented R AD-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, R AD-PAK provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S.
TABLE 1. 7545A PINOUT DESCRIPTION
1 OUT 1 Output Current
2 AGND Analog Ground
3 DGND Digital Ground
4 DB 11 Data Bit 11 (MSB)
5 DB 10 Data Bit 10
6 DB 9 Data Bit 9
7 DB 8 Data Bit 8
8 DB 7 Data Bit 7
9 DB 6 Data Bit 6
10 DB 5 Data Bit 5
11 DB 4 Data Bit 4
12 DB 3 Data Bit 3
13 DB 2 Data Bit 2
14 DB 1 Data Bit 1
15 DB 0 Data Bit 0 (LSB)
17 WR Write (Active Low)
18 V DD Digital Supply Voltage
19 V REF Reference Input
20 RFB Feedback Resistance
TABLE 2. 7545A ABSOLUTE MAXIMUM RATINGS
TABLE 3. DELTA LIMITS TABLE 4. 7545A SPECIFICATIONS
- Measured using feedback resistor.
TABLE 5. 7545A SPECIFICATIONS
- Measured using feedback resistor.
FIGURE 1. WRITE CYCLE TIMING DIAGRAM FIGURE 2. MODE SELECTION TABLE
6All data sheets are subject to change without notice ©2001 Maxwell Technologies All rights reserved. 12-Bit Buffered Multiplying Digital to Analog Converter 7545A Note: All dimensions in inches
20 PIN RAD-PAK® DUAL IN LINE PACKAGE
A -- 0.202 0.230 b 0.014 0.018 0.026 b2 0.045 0.050 0.065 c 0.008 0.010 0.018 D -- 1.000 1.060 E 0.220 0.290 0.310 eA 0.300 BSC eA/2 0.150 BSC e 0.100 BSC L 0.125 0.145 0.155 Q 0.015 0.045 0.070 S1 0.005 0.025 -- S2 0.005 -- -- N2 0
7All data sheets are subject to change without notice ©2001 Maxwell Technologies All rights reserved. 12-Bit Buffered Multiplying Digital to Analog Converter 7545A Note: All dimensions in inches
20 PIN RAD-PAK® FLAT PACKAGE
A 0.128 0.141 0.154 b 0.015 0.017 0.022 c 0.003 0.005 0.009 D 0.470 0.480 0.490 E 0.287 0.295 0.303 E1 -- -- 0.333 E2 0.155 0.160 -- E3 0.030 0.068 -- e 0.050 BSC L 0.350 0.380 0.390 Q 0.026 0.034 0.045 S1 0.005 0.007 -- N2 0
8All data sheets are subject to change without notice ©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.
9All data sheets are subject to change without notice ©2001 Maxwell Technologies All rights reserved. 12-Bit Buffered Multiplying Digital to Analog Converter 7545A Feature Option Details7545A RP F X Screening Flow Package Radiation Feature Base Product Nomenclature S = Maxwell Class S B = Maxwell Class B E = Engineering (testing @ +25°C) I = Industrial (testing @ -55°C, +25°C, +125°C) D = Dual In-line Package (DIP) F = Flat Pack RP = R AD-PAK® package 12-Bit Buffered Multiplying Digital to Analog Converter