AD2S44UMY1B

AD2S44 AD | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 8

Technical content

Gg ANALOG Low Cost, 14-Bit, Dual Channel DEVICES Synchro/Resolver-to-Digital Converter

FEATURES

Low Cost/Channel pagefecon heed 32-Pin DIL Hybrid Package one [— eH Ie boo

2.6 Arc Minute Accuracy Et ree] ae |[> fo

14-Bit Resolution awe B * Built-In Test CT Independent Reference Inputs rp" High Tracking Rate mma a wart} APPLICATIONS ike Gimbal/Gyro Control Systems Bote Robotics Engine Controllers SUES] mcsouvenr won Coordinate Conversion feast] a i on | bisaiial Military Servo Control Systems Gee ea a Fire Control Systems bet = cca Avionic Systems . Figure 1. Functionat Block Diagram of AD2S44 Antenna Monitoring CNC Machine Tooling channel and present the digital position to the common data outputs. GENERAL DESCRIPTION . . The AD2S44 also features independent reference inputs. Conse- The AD2S44 series are 14-bit dual channel, continuous tracking quently, different reference frequencies may be used for each synchro/resolver-to-digital converters. They have been designed channel. specifically for applications where space, weight and cost are at a premium. Each 32-pin hybrid device contains two independent Type II servo loop tracking converters. The ratiometric conver- MODELS AVAILABLE sion technique employed provides excellent noise immunity and The AD2S44 series is available in three accuracy grades: tolerance of long lead lengths. AD2S44UM 14-Bits 4.0 Arc Mins —55°C to +125°C The core of each conversion is performed by state-of-the-art (+2.6 Arc Mins —25°C to +85°C ) monolithic integrated circuits manufactured in Analog Devices’ apys44TM 14-Bits. 4,0 Aro Mins —$5°C to +125°C proprietary BiMOS II process which combines the advantages of Hea a lees i low power CMOS digital logic with bipolar linear circuits. The AD2S#4SM_—14-Bits 5.2 Arc Mins ~55°C to +125°C use of these ICs keeps the internal component count low and Each grade has options available which will interface to synchros ensures high reliability. and resolvers of standard voltage and frequency. The built-in test (BIT) facility can be used in failsafe systems All components are 100% tested at —55°C, +25°C, and +125°C. to provide an indication of whether the converter is tracking Devices processed to high reliability screening standards (Suffix accurately. B) receive further levels of testing and screening to ensure high Each channel incorporates a high accuracy differential condition- __levels of reliability. Full ordering information is given on the ing circuit for signal inputs providing more than 74 dB of com- _back page of this data sheet. mon mode rejection. Options are available for both synchro and resolver format inputs. The converter output is via a tristate transparent latch allowing data to be read without interruption of converter operation. The A/B and OE control lines select the reliable. However, no responsibility is assumed by Analog Devices forite Tel: 617/329-4700 ‘Twx: 710/394-6577 winich may result frome fe Use..NO license fs granted by implication er Telex: 924491 Cables: ANALOG NORWOODMASS otherwise under any patent or patent rights of Analog Devices.

SPEC | Fl CATI ONS (typical at +25°C unless specified otherwise) Parameter Comments PERFORMANCE Accuracy" AD2S44UM +4.0 (max) Arc Min —5S5°C to +125°C 2.6 (max) Arc Min —25°C to +85°C AD2S44TM 4.0 (max) Arc Min 55°C to +125°C AD2S44SM. 5.2 (max) Arc Min 55°C to +125°C Tracking Rate 20 | rev/s Resolution 14 Bits Output Coding Parallel (1 LSB = 1.3 arc mins) | Natural Binary Repeatability 1 LSB Signal/Reference Frequency 400-2600 Hz Bandwidth 100 Hz SIGNAL INPUTS Signal Voltage 2, 11.8, 26, 90 V rms See Ordering Information Input Impedance

90 V Signal 200 ka Resistive, Tolerance +2%

26 V Signal 58 ka

11.8 V Signal 26 ka

2 V Signal 4.4 ka Common Mode Rejection 74 (min) dB Common Mode Range

90 V Signal +250 Vde

26 V Signal +120 Vde

11.8 V Signal +60 Vde

Reference Voltage 2, 11.8, 26, 115 Vrms See Ordering Information Input Impedance

115 V Reference 270 ka Resistive, Tolerance +5%

26 V Reference 270 ka

11.8 V Reference 25 ka

2 V Reference 25 ka

115 V Reference +210 Vde

26 V Reference +210 Vde

11.8 V Reference +35 Vde

2 V Reference +35 Vde

-2-

Parameter | apes | units | Comments STEP RESPONSE Large Step! 63 (typ), 75 (max) 179° to 1 LSB of Error Small Step" 25 (typ), 30 (max) 2° to 1 LSB of Error POWER LINES +V5 = + SV! 75 (typ), 80 (max) mA Quiescent Condition -V, = -15V! 40 (typ), 45 (max) mA Quiescent Condition Power Dissipation 1,7 (typ), 1.9 (max) Ww Quiescent Condition DIGITAL INPUTS OF Vu 0.7 (max) Vde In = 5 pA Vin 2.0 (min) Vdc Ty = SpA AB Vy 0.7 (max) Vde I = 1.2mA Vir 2.0 (min) V de Ty = —60 pA DIGITAL OUTPUTS (DB1-DB14) Vou! 0.4 (max) Vde Ty = 1.2mA Vou! 2.4 (min) Vde Ton = 60 pA Tristate Leakage Current +40 pA Drive Capability 3 (max) LSTTL Loads DATA TRANSFER See Figure 3 Time to Data Stable (After Negative Edge of OE or Change of Level of A/B) 640 (max) ns ts Time to Data in High Impedance State (After Positive Edge of OE) 200 (max) ns ty Time for Repetitive Strobing of Selected Channel 200 (min) ns tp BUILT-IN TEST OUTPUT (BIT) Sense Active Low Low = Error Condition Vor 0.4 (max) V de Iop = 3.2 mA Vou 2.4 (min) Vde Ion = —160 pA Drive Capability 8 (max) LSTTL Loads Error Condition Set 55 (max) LSB Error Condition Cleared 45 (min) LSB DIMENSIONS 1.74 x 1.14 x 0.28 inch See Package Information 44.2 x 28.9 x 7.1 mm WEIGHT 0.80 (max) oz 23 (max) grams NOTES ‘Specified over temperature range, -55°C to +125°C, and for: (a) +10% signal and reference amplitude variation; (b) +10% signal and reference harmonic distortion; (c) =5% power supply variation; (d) + 10% variation in reference frequency. Bold face type indicates parameters which are 100% tested at nominal values of power supplies, input signal voltages and operating frequency. All other para- maters are guaranteed by design, not tested. Specifications subject to change without notice. aps XM Y Z B ORDERING INFORMATION L When ordering, the converter part numbers should be suffixed High-Ret Processing by a two letter code defining the accuracy grade, and a two digit sabe pion Avene numeric code defining the signal/reference voltage and frequency. Z ~ 1 Signal, 11.8 V Reference 26 V Synchro All the standard options and their option codes are shown 2 H Sem, = M Lipa’ 1S ee below. For nonstandard configurations, please contact Analog 7 = 4 Signal, 26 Reference, 26 V Resolver Base Part Devices. Base Part Z = 8 Signal, 11.8 V Reference, 26 V Resolver Number For example, the correct part number for a component to oper- Y = 1.400 Hz to 2.6 kHz Reference Frequency ate with 90 V signal, 115 V reference synchro format inputs and get io 055 Gouin ents ee yield a +5,2 arc minute accuracy over the ~55°C to +125° tem- Dee Se 10 ae Opereing Temperate Me perature range would be AD2S44SM12. The same part, pro- £26 Are Min Accorscy (-25°C +85°C) cessed to high reliability standards would carry the designator Sw peo ts Sa Opting Tengetnire Rade AD2S44SM12B. + 4.0 Arc Min Accuracy X = “S™ -5S°C to +125°C Operating Temperature Range ‘+ $.2 Are Min Accuracy: -3-

ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION FVg00 GND 262 vs speteiels oie vresvrenats ifs Were F1T.25 V de HVgtOGND ricies os verscares's on ies seas 1-17.25 Vide $1, $2, $3, $4 (Line to Line)! 90 V Option: § ss «4 vison os Ranaw es we vO0O VE cans! © @|oes LUBY Optbotis. sxeiareris ws scorenceiers oe ofearer 2180 Wide oars] © @ | ove Se i 281s] @ —apogag @ [081 ms8 26 V Option occ ee eee eee es £160 V de ais] @ @)-~. 18 'V Option: aces os opens oe oe £80 Vide ar] © @ |eno 2V Option sis easier csenaree oe son EV de Rio (A)| @) @ |ro8) Ruz 0 Ryo Fa ar Rut, Rio to GND ssa] @ @|se NOTE 1On synchro input options, line-to-line voltage refers to the $2-S1, $1-S3 and $3-S2 differential voltages. On resolver input options line-to-line levels refer to the $1-S3 and S2-S¢ voltages. CAUTION damage to the device may occur. Pin [Mnemonic | Description 2. Correct polarity voltages must be maintained on the + Vs and 17 DB8-DB14 | Parallel Output Data Bits —Vs pins. 26-32 | DBI-DB7 | Parallel Output Data Bits 3. The +15 V power supply must never go below GND. 8 OE | Output Enable Input 9 | AB | Channel A or B Select Input Bit Number L Weight (Degrees) 10 BIT Built-In Test Error Output a — aa ul Ryo (A) _| Input Pin for Channel A Reference Low 1 (MSB) 180.0000 2 90.0000 12 Ryn (A) Input Pin for Channel A Reference High 3 | 45.0000 13-16 | $4S1(A) | Channel A Input Signal : |. esos 17-20 | S1-S4(B) | Channel B Input Signal 6 5.6250 21 Ry (B) —_| Input Pin for Channel B Reference High i fae 2 |Ro@®) Input Pin for Channel B Reference Low 9 0.7031 23 | GND Power Supply Ground (Note: This Pin Is 10 0.3516 | | Electrically Connected to the Case.) ll 0.1758 24 | -Vs Negative Power Supply it rie 25 | +Vs | Positive Power Supply | 0 am te eget uninehieferibeSeeeeneteetee 14 (LSB for 2844) | 0.0220 Table |. Bit Weight Table ESD SENSITIVITY The AD2S44 features input protection circuitry consisting of large “distributed” diodes WARNING! and polysilicon series resistors to dissipate both high energy discharges (Human Body : < Model) and fast, low energy pulses (Charged Device Model). 14s Proper ESD precautions are strongly recommended to avoid functional damage or perfor- ae eeweiteE evice mance degradation. For further information on ESD precautions, refer to Analog Devices’ ° ESD Prevention Manual. -4-

Figure 1. Functional Block Diagram of AD2S44 A functional diagram of the AD2S44 is shown in Figure 1. converter, the synchro-resolver shaft angle, 6. available after switching the channel select and output enable should be +15 V and must not be reversed. output will be connected to $1, $2 and $3 on the unit, and a supply pins to GND. , neers should be taken to the zero volt potential in the system. V2=K Ep sin wr cos @ 26 is the MSB, Pin 7 the LSB. Where 6 is the angle of the synchro shaft, Eo sin wr is the refer- The reference connections are made to REF HI and REF LO.

5 Es3-s2 = Epo-rui sin wt sin (0-120°)

after A/B is toggled. Timing information is shown in Figure 2. erence signal prior to BIT responding to the condition. in Figure 2 and detailed in the “Data Transfer” section of lized to within 5% of their final values. resulting from an instantaneous step. f rate of the AD2S44 is exceeded (20 RPS typical). DATA ae) "7 W x\\ the selected channel are lost. Thay Uenkien Comma DATA VALIOt input synchro/resolver angles will drive BIT to a logic low.

7 This may include, but is not necessarily limited to, accelera-

noise on the signal connections. Figure 2. AD2S44 Timing Diagrams signal inputs. selected channel, the BIT ontput goes low indicating that an The transfer function of the converter is given below. The BIT signal has a built-in hysterisis, i.e., the error required o (4) Ks a+aTy .

Sour _ Ka 1+sTi radians, minutes of arc, LSBs, etc. or about 800 revolutions/sec*. ‘The gain and phase diagrams are shown in Figures 4 and 5. 7 environmental conditions are available on request. Figure 4. AD2S44 Gain Plot ie Figure 6. 2544 MTBF vs. Temperature

180 As part of the standard manufacturing procedure, all converters

Figure 5. AD2S44 Phase Plot 1, Preseal Burn In 64 Hours at +125°C

PROCESSING FOR HIGH RELIABILITY (B SUFFIX) OTHER PRODUCTS Prvcesa Goindiciaiee Many other products concerned with the conversion of synchro/ resolver data are manufactured by Analog Devices, some of 1. Preseal Burn In 64 Hours at +125°C which are listed below. 2. Precap Visual Inspection — MIL-STD-883C, The SDC/RDC1740/41/42 are hybrid synchro/resolver to digital Method.2017 converters with internal isolating micro transformers. 3. Temperature Cycling 10 Cycles, The SDC/RDC1767/68 are identical to the SDC/RDC1740 series —65°C to + 150°C but with the additional features of analog velocity output and de 4. Constant Acceleration 5000G, Y1 Plane error output. 5. Interim Electrical Tests The OSC1758 is a hybrid sine/cosine power oscillator which can g : oy provide a maximum power output of 1.5 watts. The device q 6 ‘Operating Burs Ta 96 Hous G+ 50 operates over a frequency range of 1 kHz to 10 kHz. § TesSealeTEH, Fine to eros: ek” ‘The DRC1745 and DRC1746 are 14- and 16-bit natural binary 8 . | . latched output high power hybrid digital-to-resolver converters. ° 8. Final Electrical Testing Performed at Tinins ‘The accuracies available are +2 and +4 arc minutes, and the (Group A) Tamb and Trax outputs can supply 2 VA at 7 V rms. Transformers are available 9. External Visual Inspection MIL-STD-883C, to convert the output to synchro or resolver format at high volt- Method 2009 age levels. NOTE: Test and screening data can be supplied. Further infor- The AD2S65/66 are similar to the DRC1745/46 but do not i include the power output stage. These devices are available in mation on request. 2 accuracy grades to 1 arc minute. ‘The 2880 series are monolithic ICs performing resolver to digital conversion with accuracies up to +2 arc minutes and 16-bit resolution. OUTLINE DIMENSIONS Dimensions shown in inches and (mm). >| ANALOG DEVICES MEMORY DEVICES DIVN MADE IN ENGLAND ‘AD2S44 orion £273 gae28, Sew cme per - L Jt o.gas al fp cote ese rv" TFT fo 223»} 0855) [st bases fe 174 e423 ——__+ treed rT cueseans ; ‘> Gierenent odspin cot0 3 oa | eset S88, a san sortom view | rs412901 z [a] ° E cleccccccccccccs Unless OMERWise STATED Fa 1400 (3556) -8-