AD C541/542 Data Converter Line 8-Bit, W ide Temperature 2.5µS AD Cs FEATURES • • • • • 2.5µS conversion time Low Power: 650mW W ide temperature range models: -55ºC to +125ºC operation M IL-STD-883 or commercial/industrial processing Plug-in replacements for A DC82 DESCRIPTIO N The A DC541/542 Series are fast, low power, hybrid IC analog-to-digital converters (A CDs). The series features 8-bit resolution and accuracy with 2.5µS typical conversion time. The lower power drain of 650 mW is from standard ±15 V DC and +5V DC power supplies. A ll models are hermetically seated in 24-pin DIP style packages and are complete with precision thin-film DA C, clock, comparator reference and successive approximation register. A ll models can be externally pin-connected for 3 unipolar and 3 bipolar input ranges. Output coding in the bipolar mode is user selectable as either offset binary or 2’s complement. A DC541/ 542 feature an overall temperature coefficient of ± 45 ppm/ºC and long-term stability if 0.1% /year. A DC541/542 models provide systems designers with greater flexibiity savings in space and weight and the ultimate in reliability. Their compact size, 8-bit resolution, accuracy an extensive self-contained features are particularly well suited to microprocessor applicat ions. The A DC541C-8 and A DC542C-8 are processed to commercial/industrial standards and operate –25ºC to +85ºC. A DC541B-8 and A DC542B-8 are processed to M IL-STD-883 Rev.C, Level B requirements, and operate –55ºC to +125ºC. In addition, the A DC542 versions are plug-in replacements for the A DC82. FU N C TIO N AL D IAG RAM +15V 22 (19) 2 (17) A NA GND (13) DA C 4 19 (4) SUM M ING JUNCT 10V INPUT 20V INPUT BIPOLA R OFFSET 18 (5) 3 (18) 17 (6) 24 (14) 23 (15) 5k 16 (7) 5k 8 (8) 1 (16) 6.2k 7 (9) 20 (20) -15V 6 (10) REF 5 (11) 21 9 (12) 10 (3) (1) CLOCK OUT CLOCK 14 (24) +5V K EY LINES GA IN A DJ COM P SUCCESSIV E A PPROXIM A TION REGISTER 10 (23) (22) (21) 15 BIT 8 (LSB) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 (M SB) M SB STA TUS STA RT CLOCK IN SERIA L OUT 12 (2) A LL UNITS A D541 ONLY A D542 ONLY PIN OUTS n - A DC541 (n)-A DC542 165Cedar Hill Street,Marlborough,MA01752 Tel:508.485.6350 Fax: 508.485.5168 www.SpectrumMicrowave.com 11 DIG GND ADC541/542 SPECIFICATIO N S Pin A ssignment (Typical @ +25ºC and nominal power supplies unless otherwise noted) SERIES RESOLUTION TY PE A NA LOG INPUT Unipolar Bipolar Impedance DIGITA L INPUTS Start Command Pulse Input Logic Loading Clock in (A DC542 only) DIGITA L OUTPUTS Data Coding, A DC541 Unipolar Bipolar Data Coding, A DC542 Unipolar Bipolar Data Output Drive Capability Status Output Drive Capability A DC541 A DC541/542 8-Bits Successive A pproximation PIN 1 2 3 4 5 6 7 8 9 10 11 12 0 to +5V , 0 to +10V . 0 to +20V ±2.5V , ±5V . ±10V 500 /V olt 100nS wide, min Logic " 1" > +2.0V ; Logic " 0" < +0.8 2 TTL Loads 2 TTL Loads Parallel Outputs Only Binary 2‘s Complimentary Offset Binary Parallel and Serial Output Complimentary Binary Complimentary Offset Binary Complimentary 2's Complement 3TTL Loads Logic " 1" > +2.4V Logic " 0" > 0.4V 2 TTL Loads, Logic “ 1” during conversion Clock Out (A DC542 only) Frequency 2.85 M Hz REFERENCE Internal CONV ERSION TIM E/ THROUGHPUT RA TE 2.5µS, typ; 2.8µS max/400 kHz A CCURA CY Quantization ±1/2 LSB max Linearity ±0.2% of F.S.R. max Offset, Unipolar and Bipolar 1 ±0.2% of F.S.R. max Gain 1 ±0.2% of F.S.R. max STA BILITY Over Specified Temperature Range Linearity ±10ppm/ºC Gain ±40ppm/ºC Offset ±10ppm/ºC Transfer A ccuracy2 ±45ppm/ºC Long Term ±0.1% /year @ +25ºC POW ER SUPPLY Requirements +15V ±3% 20mA max -15V ±3% 12mA max +5V ±5% 105mA max Rejection Ratio 0.05% /% (+15V ); 0.01% /% (-15V ) Power Consumption 1W max TEM PERA TURE RA NGE Specified A DC541C/542C 0º to 70ºC A DC541B/542B -55ºC to +125ºC Storage, A ll M odels -65ºC to +150ºC M ECHA NICA L Case Style Case A (ceramic): A DC542 Case Envelope Dimensions Case B (metal): A DC541 FUNCTION BIPOLA R OFFSET A NA LOG GND SUM M ING JCT. A NA LOG GND BIT 1 (M SB) BIT 2 BIT 3 BIT 4 BIT 1 (M SB) STA TUS DIGITA L GND DIGITA L GND PIN 24 23 22 21 20 19 18 17 16 15 14 13 FUNCTION +10V INPUT +20V INPUT +15V –15V –15V BIT 8 (LSB) BIT7 BIT6 BIT 5 +5V +5V STA RT FUNCTION CLOCK OUT DIGITA L GND STA TUS Bit 8 (LSB) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 (M SB) Bit 1 (M SB) PIN 24 23 22 21 20 19 18 17 16 15 14 13 FUNCTION +5V SRA RT CLOCK IN SERIA L OUT –15V 15V SUM M ING JCT A NA LOG GND BIPOLA R OFFSET 20V INPUT 10V INPUT GA IN A DJUST A DC542 PIN 1 2 3 4 5 6 7 8 9 10 11 12 NOTES 1. Initial offset and gain errors are externally adjustable. See A PPLICA TIONS INFORM A TION. 2. Includes effects of Linearity, offset, and gain errors. O RD ERIN G IN FO RMATIO N M ODEL DESCRIPTION A DC541C-8 A DC541B-8 A DC542C-8 Commercial/Industrial Process M IL-STD-883 Rev. C, Level B Process; Commercial/Industrial Process A DC82 Pin Out Compat. M IL-STD-883 Rev. C, Level B Process; A DC82 Pin Out Compat. A DC542B-8 Specifications subject to change without notice. CA SE A (CERA M IC): A DC542 CA SE B (M ETA L): A DC541 TY PICA L DIM ENSIONS 0.010 (0.254) 0.600 (15.24) 1 DIM ENSION inches (mm) MAX 0.018 ± 0.002 (0.045 ± 0.054) 0.010 0.018 (0.451) 0.600 (0.254) PIN (1) INDEX 24 (15.24) RED DOT INDICA TES PIN 1 1 0.100 1.295 (2.54) (32.893) TOP V IEW 0.775 (16.685) inch mm 0.165 (4.191) 0.220 M IN (5.588) 0.175 M A X (4.45) 24 1.275 M A X (32.305) 0.100 TY P (2.450) Consult factory for application information. 12 13 0.790 (20.066) 12 0.205 (5.207) 0.025 (0.635) 13 TOP V IEW 0.10 (2.54) 0.03 (0.762) STA NDOFFS SUPPLIED