元器件交易网www.cecb2b.com®®ADS-118, ADS-118A12-Bit, 5MHz, Low-Power
Sampling A/D Converters
INNOVATION and EXCELLENCE
FEATURES••••••••••12-bit resolution5MHz minimum sampling rateFunctionally completeSmall 24-pin DDIPRequires only ±5V suppliesLow-power, 1.3 WattsOutstanding dynamic performanceNo missing codes over full military temperature rangeEdge-triggered, no pipeline delayIdeal for both time and frequency-domain applicationsPIN1234567101112
FUNCTIONBIT 12 (LSB)BIT 11BIT 10BIT 9BIT 8BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2
BIT 1 (MSB)
PIN2423222120191817*16151413
GENERAL DESCRIPTIONDATEL's ADS-118 and ADS-118A are 12-bit, 5MHz, samplingA/D converters packaged in space-saving 24-pin DDIP’s. TheADS-118 offers an input range of ±1V and has three-stateoutputs. The ADS-118A has an input range of ±1.25V andfeatures direct adjustment of offset error.These functionally complete low-power devices (1.3 Watts)contain an internal fast-settling sample/hold amplifier, a 12-bitsubranging A/D converter, a precise voltage reference, timing/control logic, and error-correction circuitry. All timing andcontrol logic operates from the rising edge of a single startconvert pulse. Digital input and output levels are TTL. Modelsare available for use in either commercial (0 to +70°C) ormilitary (–55 to +125°C) operating temperature ranges.Applications include radar, transient signal analysis, processcontrol, medical/graphic imaging, and FFT spectrum analysis.INPUT/OUTPUT CONNECTIONSFUNCTION
NO CONNECTIONANALOG GROUNDNO CONNECTION+5V ANALOG SUPPLY–5V SUPPLYANALOG INPUTANALOG GROUNDENABLE/OFFSET ADJ.START CONVERTEOCDIGITAL GROUND+5V DIGITAL SUPPLY
*ADS-118, Pin 17 is ENABLE
ADS-118A, Pin 17 is OFFSET ADJUST
OFFSET ADJUST 17(ADS-118A only)
BUFFERS/H+FLASHADC1REGISTER–17 ENABLE
(ADS-118A only)
ANALOG INPUT 19
12 BIT 1 (MSB) 11 BIT 2
DIGITAL CORRECTION LOGIC3-STATE OUTPUT REGISTER10 BIT 39 BIT 48 BIT 57 BIT 66 BIT 75 BIT 94 BIT 93 BIT 102 BIT 111 BIT 12 (LSB)
REFDACΣFLASHADC2REGISTER20–5V SUPPLY
AMPSTART CONVERT 16
EOC 15TIMING ANDCONTROL LOGIC21+5V ANALOGSUPPLY
13+5V DIGITALSUPPLY
14DIGITALGROUND
18, 23ANALOGGROUND
22, 24NO CONNECT
Figure 1. ADS-118/118A Functional Block Diagram
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance: (800) 233-2765
元器件交易网www.cecb2b.com
ADS-118/118A
元器件交易网www.cecb2b.com
ADS-118/118A
元器件交易网www.cecb2b.com
ADS-118/118A
元器件交易网www.cecb2b.com
ADS-118/118A
元器件交易网www.cecb2b.com
0–10)B–20d( ela–30cS l–40luF o–50t ev–60itale–70R ed–80utilp–90mA–100–110–120–130
0 250 500 750 1 1.25 1.5 1.75 2 2.25 2.5
kHz kHz kHz MHz MHz MHz MHz MHz MHz MHz
Frequency
(fs = 5MHz, fin = 2.45MHz, Vin = –0.5dB, 4,096-point FFT)
+0.67
)sB'SL( 0
NLDsecen–0.47
rcu0
cDigital Output Code
4096
O of rembuN0
Digital Output Code
4096
ADS-118/118A
元器件交易网www.cecb2b.com
+15VP3NOTES:1R62START1. UNLESS OTHERWISE SPECIFIED+5VFR221.2MSG4CONVERT ALL CAPACITORS ARE 50VC1720K1 C1-C6 ARE 20V2.2MF3C20 ALL RESISTORS ARE IN OHMS4.7MFC222. AS AN OPTION, COXIAL CABLE+-15VOPTIONAL+ BETWEEN THESE TWO POINTS.74HCT573220R4+5VF1D1Q1934332K0.1MFC213142D2Q183231X1FOR ADS-118/118A 5MHZ4JPR318FOR ADS-119 10MHZ3D3Q173029+15V+5VA32574D4Q16B128(MSB)27SG5SG6ADS-118/11965DU35Q15B22625+5V13C18+5VDB11276D6Q14B32423R714R5DGNDB21187D7Q13B422211.98K4JPR51185011OPTION.1MF16TRIGB31098D8Q12B5201915U4101191219ANAINB49+5VF11LEOE1R12SG96SEE NOTE 23118A2410500GAINC19+5VA119AB583JPR622SEE NOTE 2U1B67P1OPTION0.1MF1+5V21+5VAB76+5VF2.2MFC16SG7SG8118AJPR1118A119A119R317ENABLE B85OFFSET20K274HCT573+-15V-5VA311811920-5VB94220P4+5V-5V181D19B61817AGNDB1031Q3ANALOG-5VA2D18B7INPUTJPR21231615AGNDB1122Q4P23D17B82L7,20MHY315141321+5VA4EOC B1213Q54D4Q16B912113C145DU25Q15B10109L62.2MFC7.01MF+5VF7656D6Q14B118720MHY+15V0.1MFC15887C137D7Q13B126(LSB)5L52.2MFC60.01MF109-15V11498D8Q124320MHYU531211C5C12L30.01MF+5V2+5VF11LEOE1JPR423212.2MF774HCT861011413L420MHYC316150.01MFC1020MHY-5VAC11L12.2MF181774HCT862.2MFC40.01MF20MHY+5VF92019C8U582.2MFC10.01MF102221L2242320MHY-5V42625SG1U562.2MFC20.01MFC95SG21274HCT86SG313U511SPARE GATESFigure 7. ADS-118/118A Evaluation Board Schematic (ADS-B118)®®ADS-118/118A7元器件交易网www.cecb2b.com
ADS-118/118A
