976A 16-Bit Analog to Digital Converter 4k 3k 12k 4k Memory Functional Block Diagram FEATURES: DESCRIPTION: • RAD-PAK® radiation-hardened against natural space radiation • Total dose hardness: > 100 krad (Si), depending upon space mission • SEE Performance: SEL and SEFI immune at LET = 85MeV cm2 and 125°C • Package: 28 pin RAD-PAK® flat package • 200 kHz max sampling rate • Data Coding - Binary Twos Compliment • ±10 V input range • Single +5 V supply operation • Utilizeses an internal or external reference • Power dissipation: 100 mW max Maxwell Technologies’ 976A high-speed 16-bit analog to digital converter, features a greater than 100 krad (Si) total dose tolerance depending upon space mission, using Maxwell’s radiation-hardened RAD-PAK® packaging technology. It is a 28 pin, 16-bit sampling analog to digital converter using state-ofthe-art BiCMOS structures. The 976A contains a 16-bit capacitor based SAR A/D with S/H, reference, clock and interface for microprocessor use. The 976A is specified at a 200 kHz sampling rate, and guaranteed over the full temperature range. Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. 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 Maxwell Technologies’ self-defined Class S. 04.17.14 Rev 3 (858) 503-3300- Fax: (858) 503-3301 - www.maxwell.com All data sheets are subject to change without notice 1 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter TABLE 1. 976A PIN DESCRIPTION PIN SYMBOL DESCRIPTION 1 VIN Analog Input. Connect a 200 ohm resistor between VIN and the analog signal source. Full scale input range is +10V. 2 AGND1 3 REF Reference Input/Output. The internal +2.5V reference is available at this pin. Alternatively, an external reference can be used to override the internal reference. In either case, connect a 2.2uF tantalum capacitor between REF and AGND1. 4 CAP Referenced buffer Output. Connect a 2.2uF tantalum capacitor between CAP and AGND2. 5 AGND2 6 D15(MSB) 7-13 D14-D8 Data bits 14 -8.High impedence state when CS high or when R/C is Low. 14 DGND Digital Ground. 15-21 D7-D1 Data Bits D7-D1. High impedence state when CS is high or when R/C is Low. 22 D0(LSB) 23 BYTE 24 R/C Read/Convert Input. With CS LOW, a falling edge on R/C puts the internal sample/hold into the hold state and starts a conversion; a rising edge enables the output data bits. 25 CS Chip Selet Input. Internally OR’d with R/C. With R/C LOW, a falling edge on CS will initiate a conversion. With R/C HIGH, a falling edge on CS will enable the output data bits. When CS is HIGH, the output data bits will be in the Hi-impedence state. 26 BUSY Busy output. Goes LOW when a conversion is started and remains LOW until the conversion is completed and the data is latched into the output register. With CS tied LOW and R/C HIGH, output data will be valid when BUSY rises. The rising edge of BUSY can be used to latch the output data. 27 VANA Analog Power Supply. Nominally +5V. 28 VDIG Digital Power Supply. Nominally +5V. Analog Ground. Used as ground reference point for REF pin.. Analog Ground. Data Bit 15. Most significant bit of conversion result. High impedence state when CS is high or when R/C is Low. Memory Data Bit 0. High impedence state when CS is high or when R/C is Low. Byte Select. With Byte LOW, data will be output as indicated above; Pin 6 (D15) is the MSB, Pin 22 (D0) is the LSB. Wtih BYTE HIGH, the top and bottom 8 bits of data will be switched; D15-D8 are output on Pins 15-22 and D7-D0 are output on Pins 6-13. - TABLE 2. 976A ABSOLUTE MAXIMUM RATINGS PARAMETER Analog Inputs - VIN - CAP - REF MAX UNIT V +25 +VANA + 0.3V TO AGND2 - 0.3V Indefinite Short to Ground 04.17.14 Rev 3 All data sheets are subject to change without notice 2 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter TABLE 2. 976A ABSOLUTE MAXIMUM RATINGS PARAMETER MAX Ground Voltage Differences: - DGND - AGND1 - AGND2 +0.3 +0.3 + 0.3 UNIT V VANA 7 V VDIG 7 V VDIG to VANA +7 V Digital Inputs -0.3V to VDIG + 0.3V V Junction Temperature +150 °C Operating Temperature -55 to +125 °C Weight 5.5 Grams Thermal Resistance (Tjc) 1.3 °C/W -65 to +150 °C Storage Temperature Memory TABLE 3. 976A DC ACCURACY SPECIFICATIONS1 (SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER SUBGROUPS MIN TYP MAX UNIT Integral Linearity Error 1,2, 3 -3 -- +3 LSB 2 Differential Linearity Error 1,2, 3 -1 -- 4 LSB No Missing Codes 3 1, 2, 3 15 -- -- Bits -- 1.0 -- LSB -- +0.5 % +0.6 % ±7 -- ppm/°C Transition Noise 4 Full Scale Error 5,6 1, 2, 3 -0.5 Full Scale Error 5,6 (using ext. 2.5000 Vref) 1, 2, 3 -0.6 Full Scale Error Drift -- Full Scale Error Drift (using ext. 2.5000 Vref) -- -- ±7 -- ppm/°C 1, 2, 3 -10 -- +10 mV -- ±2 -- ppm/°C -12 -- +8 LSB Bipolar Zero Error 5 Bipolar Zero Error Drift Power Supply Sensitivity 1,2, 3 1. Unless otherwise specified, VREF = 2.5V, VIH = 2.0V, VIL = 0.8 V 2. LSB stands for Least Significant Bit. One LSB is equal to 305 µV. 3. Not tested. 4. Typical rms noise at worst case transitions and temperatures. 5. Measured with various fixed resistors. 6. For bipolar input ranges, full scale error is the worst case of -Full Scale or +Full Scale untrimmed deviation from ideal first and last scale code transitions, divided by the transition voltage (not divided by the full-scale range) and includes the effect of offset error. For unipolar input ranges, full scale error is the deviation of the last code transition divided by the transition voltage. It also includes the effect of offset error. 04.17.14 Rev 3 All data sheets are subject to change without notice 3 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter TABLE 4. DELTA LIMITS1 PARAMETER VARIATION +10% per Table 10 ICC 1) Parameters are measured and recorded as Delts per MIL-STD-883 for Class S devices. TABLE 5. DIGITAL INPUTS PARAMETER SUB-GROUPS MIN MAX UNITS Input Voltage VIL1 1, 2, 3 -0.3 +0.8 V Input Voltage VIH1 1, 2, 3 +2.0 VDIG +0.3 V Input Current IIL 1, 2, 3 -10 10 uA 10 uA Input Current IIH 1, 2, 3 -10 1. Tested by application of signal, VIL at 0.8V, VIH at 2.0V. Memory DIGITAL OUTPUTS SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER SUB-GROUPS MIN MAX UNITS 0.4 V 5 uA Data Formatting - 16 Bits Data Coding - Binay Twos Compliment VOL @ 1.6mA 1, 2, 3 IOL 1, 2, 3 -5 VOH @ 500uA 1, 2, 3 4 IOH 1, 2, 3 -5 V 5 uA TABLE 6. 976A ANALOG INPUT AND THROUGHPUT SPEED SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER Voltage Ranges Impedance1 SUBGROUPS MIN -- -10 MAX UNIT 10 V 1, 2, 3 -- 13 -- kohms -- 22 -- pF 1, 2, 3 -- -- 15 pF 9, 10, 11 -- -- 5 µs 9, 10, 11 200 -- -- kHz Capacitance1 Output Capcitance1 Complete Cycle (Acquire and Convert) Throughput Rate 1. Not Tested. 2 TYP 2. Tested by application of signal at limit. 04.17.14 Rev 3 All data sheets are subject to change without notice 4 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter TABLE 7. 976A AC ACCURACY SPECIFICATIONS SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER SUBGROUPS MIN TYP MAX UNIT Spurious-Free Dynamic Range, fIN = 20 kHz 1 4, 5, 6 90 -- -- dB 2 Total Harmonic Distortion, fIN = 20 kHz 1 4, 5, 6 -- -- -90 dB Signal-to-Noise (Noise + Distortion) 1 fIN = 20 kHz -60 dB Input 4, 5, 6 83 -- -27 --- Signal-to-Noise 1, fIN = 20 kHz 4, 5, 6 83 -- -- dB -- 1 -- MHz dB Full-Power Bandwidth 1,3 1. Not Tested 2. All specifications in dB are referred to a full-scale ±10 V input. 3. Full-Power Bandwidth defined as Full-Scale input frequency at which Signal-to-Noise (Noise + Distortion) degrades to 60 dB. Memory TABLE 8. 976A SAMPLING DYNAMICS SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER SUBGROUPS MIN TYP Input Bandwidth MAX 2.7 Aperture Delay -- Aperture Jitter 9, 10, 11 Transient Response FS Step2 9, 10, 11 Overvoltage Recovery 1 UNIT MHz 40 -- ns Sufficient to meet AC specification -- -- 1 us -- 150 -- ns 1. Recovers to specified performance after 2 X FS input overvoltage. 2. Not Tested TABLE 9. 976A REFERENCE SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER CONDITIONS MIN TYP MAX UNIT Internal Reference Voltage No Load 2.48 2.5 2.52 V Internal Reference Source Current (Must be ext. buffer) -- 1 -- µA External Reference Voltage Range for Specified Linearity 1 -- 2.5 -- V -- -- 100 µA External Reference Current Drain 2.30V & 2.70V 1. Tested by application of signal at 2.5V +/- 0.02V. 04.17.14 Rev 3 All data sheets are subject to change without notice 5 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter TABLE 10. 976A POWER SUPPLIES SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) PARAMETER SUBGROUPS CONDITIONS MIN TYP MAX UNIT Must be < VANA 4.75 5 5.25 V VDIG 1, 2, 3 VANA 1, 2, 3 4.75 5 5.25 V IDIG -- -- -- 5 mA IANA -- -- -- 15 mA Icc 1, 2, 3 IDIG + IANA @ 200kHz 20 mA Power Dissipation 1, 2, 3 VANA = VDIG = 5V fs = 200 kHz mW -- -- 100 TABLE 11. 976A CONVERSION AND DATA TIMING SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%) DESCRIPTION SUBGROUPS MIN TYP MAX UNIT t11 Convert Pulse Width 9, 10, 11 50 -- -- ns t2 Data Valid Delay after R/C Low 9, 10, 11 -- -- 4.0 µs t3 BUSY Delay 9, 10, 11 -- -- 100 ns t4 BUSY LOW 9, 10, 11 -- -- 4.0 us t5 BUSY Delay after End of Conversion -- -- 180 -- ns t6 Aperture Delay -- -- 40 -- ns t72 Conversion Time 9, 10, 11 -- 3.8 4.0 µs t82 Acquisition Time 9, 10, 11 1.0 -- -- µs t9 Bus Relinquish Time 9, 10, 11 10 35 83 ns t10 BUSY Delay after Data Valid 9, 10, 11 50 180 -- ns t11 Previous Data Valid after R/C Low -- -- 3.7 -- us Throughput Time 9, 10, 11 -- -- 5 µs t121 R/C to CS Setup Time 9, 10, 11 10 -- -- ns t131 Time Between Conversions 9, 10, 11 5 -- -- µs t14 Bus Access and Byte Delay 9, 10, 11 5 -- 83 ns t7 + t8 Memory SYMBOL 1. Tested by application of signal at limit. 2. Internal timing specification, not directly measured. 04.17.14 Rev 3 All data sheets are subject to change without notice 6 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter FIGURE 1. CONVERSION TIMING WITH CS\ LOW Memory FIGURE 2. CS\ TO CONTROL CONVERSION & READ TIMING 04.17.14 Rev 3 All data sheets are subject to change without notice 7 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter FIGURE 3. USING CS AND BYTE TO CONTROL DATA BUS READ TIMING Memory 04.17.14 Rev 3 All data sheets are subject to change without notice 8 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter Memory 28-PIN RAD-PAK® FLAT PACKAGE DIMENSION SYMBOL MIN NOM MAX A 0.119 0.132 0.145 b 0.015 0.017 0.019 c 0.004 0.005 0.006 D 0,792 0.800 0.808 E 0.405 0.410 0.415 E1 0.245 0.250 0.255 E2 0.030 0.080 -- e 0.050 BSC L 0.390 0.400 0.410 Q 0.024 0.030 0.036 S1 0.020 0.067 -- N 28 Note: All dimensions in inches Top and Bottom of package internally connected to ground. 04.17.14 Rev 3 All data sheets are subject to change without notice 9 ©2014 Maxwell Technologies All rights reserved. 16-Bit Analog to Digital Converter 976A 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 Technologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts. Memory 04.17.14 Rev 3 All data sheets are subject to change without notice 10 ©2014 Maxwell Technologies All rights reserved. 976A 16-Bit Analog to Digital Converter Product Ordering Options Model Number 976A RP F X Option Details Feature Monolythic1 S= Maxwell Self-Defined Class S B = Maxwell Self-Defined Class B I = Industrial (testing @ -55°C, +25°C, +85°C) E = Engineering (testing @ +25°C) Package F = Flat Pack Radiation Feature RP = RAD-PAK® package Base Product Nomenclature 16-Bit Analog to Digital Converter Memory Screening Flow 1) Products are manufactured and screened to Maxwell Technologies self-defined Class B and Class S flows. 04.17.14 Rev 3 All data sheets are subject to change without notice 11 ©2014 Maxwell Technologies All rights reserved.