AD2700

AD2700 AD2701 AD2702 +/- Volt Precision Reference Series data sheet (Rev B)

Document overview

• Manufacturer or author: Analog Devices, Inc.
• PDF pages: 4

Technical content

g ANALOG +10 Volt Precision FEATURES FUNCTIONAL BLOCK DIAGRAMS Very High Accuracy: 10.000 Volts +2.5mV (L and U) FINE Low Temperature Coefficient: 3ppm/*' c ‘©. *- Performance Guaranteed -55°C to +125°C a 10mA Output Current Capability PAD career lem tH Short Circuit Protected Available as /883B a ep AD2700 ©) @) ‘COMMON FINE ADJUST FINE +FINE +15.0v ADJUST ADJUST PRODUCT DESCRIPTION — eae a — The AD2700 family of precision 10 volt references offer the EY oureur user excellent accuracy and stability at 2 moderate price by [ +++—— | combining the recognized advantages of thin film technology and active laser trimming. The low temperature drift pn | Ln” \\ (3ppm/ C) achieved with these technologies can be matched => (2) Bgannev only by the use of ovens, chip heaters for temperature regu- point ©) Ls lation, or with hand selected components and manual trim- ming. In addition, temperature-regulated devices are guaran- teed only up to +85°C operation, whereas the U- and Segrade o>—o oO—H) devices in the AD2700 family are guaranteed to +125°C. an we we The AD2700 is a +10 volt reference which is designed to AONUsT sir interface with high accuracy bipolar D/A converters of 10 PRODUCT HIGHLIGHTS and 12 bit resolution. The 10mA output drive capability 1, Active laser trimming of both initial accuracy and temper- also makes the AD2700 ideal for use as a general positive ature performance results in very high accuracy over the system reference. temperature range without external components. The i ‘ i AD2700/01/02 LD grades have a maximum output The AD2701 is a negative 10 volt reference especially de- a4 : P signed to interface with CMOS D/A and A/D converters, as voltage ertor at 25°C of £2.5mV with no external shown in the applications. For systems requiring a dual tracking adjustments, reference, the AD2702 offers both positive and negative preci- 2. The performance of the AD2700 series is achieved by a sion 10 volt outputs in a single package. Both are often used well-characterized design and precise control over the with 52XX Series 12-bit A/D converters which require mianufacturing process. ~10V external references for high accuracy over wide 3. The AD2700 series is well suited for a broad range of temperature ranges. applications requiring an accurate, stable reference source All three devices are offered in ‘‘J” and ‘‘L” grades for opera- such as high resolution data converters (12 or 14 bits), tion from -25°C to +85°C and “‘S” and “‘U” grades for the test and measurement systems and calibration standards. -55°C to +125°C temperature range, Screening to MIL-STD- 883 is available for “‘S” and “‘U" grades of the AD2700 Model Output family, AD2700 +10.000V AD2701 -10.000V AD2702 +£10.000V Information furnished by Anelog Devices is believed to be accurate its use; nor for any nts of patents or other rights of thir is " portion which may result from its use. No license ls granted by implica. Tel: 617/329-4700 Twx: 710/394-6577 tion or otherwise under sny petent or patent rights of Analog Devices. Telex: 924491 Cables: ANALOG NORWOODMASS REV.B

CIF CATIONS (max or min @ Ey +15¥ @ +25°C, AD2700/AD2701/AD2702—SPECIFI Wy = 2K0) unless terse noted) MODEL jD ) sD uD ABSOLUTE MAX RATINGS . Input Voltage (for applicable supply) +20V : : Power Dissipation @ +25°C — AD2700,01 300mW ° . ° — AD2702 450mW . ‘ ° ° Operating Temperature Range -25°C to +85°C . =s5°Cto+125°C —** Storage Temperature Range -65°C to +150°C : . bd Lead Temperature (soldering, 10s) +300°C : ° . Short Circuit Protection (to GND) Continuous . bd od OUTPUT VOLTAGE ERROR @ +25°C AD2700 —10.000V £0,005V £0.0025V ° bi AD2701_—-10,000V £0.005V £0,0025V bs bed OUTPUT CURRENT! — @ +25°C £10mA . ° ° (Vin = #13 to £18V) over op. temp. range +5mA +5mA, -2mA bid bid OUTPUT VOLTAGE ERROR — AD2700,01 10ppm/°C 3ppm/°C se cad (Tynin t0 Tmax)? #11.0mV £4.3mV +8mV +5.5mV AD2702~—-10ppm/°C Sppm/°C bad 3ppm/°C £11.0mV £5.5mV +10.0mV £5.5mV LINE REGULATION . . . Vin = 13.5 to t16.5V 300nV/V 0 to 10mA 50nV/mA. id Mi ui OUTPUT RESISTANCE 0.052 - * . INPUT VOLTAGE, OPERATING +13V to +18V * ° % QUIESCENT CURRENT — AD2700, 01 t14mA : : . — AD2702 +17mA, -4mA bd : ° NOISE (0.1 to 10Hz) 50uV p-p typ . * - LONG TERM STABILITY (@ +55°C) 100ppm/1000 Hrs. (typ) * * . OFFSET ADJUST RANGE (Sec Diagrams) +20mV (min) ad id * OFFSET ADJUST TEMP DRIFT EFFECT —#4uV/°C per mV of Adjust (typ) me * 2 PACKAGE OPTION*™* DH-14C DH-14C DH-14C DH-14C NOTES Same as “JD” grade performance. Same as “LD” grade performance. °Same as “SD” grade performance. * Specified with resistive load to common, Device not intended for use in driving « dynamic load. 7 Output voltage error as a function of temperature is determined using the box method. Each unit is tested at Trin, Tmax and +25°C. At each temperature Vout must fall within the rectangular area bounded by the minimum and maximum temperature and whose maximum Voyr value is equal to VouT nominal plus or minus the maximum +25°C error plus the maximum drift error from +25°C. The box limits are noted , below the drift values used to calculate the box. ‘Analog Devices reserves the right to ship side-brazed ceramic pac (oudine DIEA4D) ta lieu of te sanded ceramic Packages for } ii L grade parts.” “See Section 14 for package outline information. Specifications subject to change without notice. “2 REV. B

FINE Mayr FINE, TEST ev: adjust AU ADWUsT 216 POT NIC MIC OOOO OOO | eo ope oz 13 [ eermr | rt } ‘AD2700: 410,000 VOLT REFERENCE t. - OMOODOO® + Ne NG Ne NIG NIG NIG COMMON = IME ogy FINE rest “18V. abst “SE ADIT 15 PONT NC WIC OOOO OOO | oem oper [ADQ7O1; 10,000 VOLT REFERENCE toe ar | YVOOOOO®D Ne NIG NG NIG NIG NIC COMMON seo jm FINE Vou FINE rest 4 OO OOYOO® voy | bY Vout * -10.000v ‘ADZM2: £10,000 VOLT REFERENCE > ta 4 | Your +10.000v PROVIDES $20mV OUTPUT OFF OROROROROROES, Tm reer te Fine SO Fine “16 Ni NIG COMMON OFFSET CORRECTION (EXTER. ADRIST Voyr ADJUST = NAL ADJUSTMENT OPTIONAL]. Pin Designations Fine Trim Connections USING AD2700 REFERENCE WITH THE AD7520 AND AN IC AMPLIFIER TO BUILD A DAC the -10 volt AD2701 will result in a 0 to +10 volt range. Two The AD2700 series is ideal for use with the AD7520 series of operational amplifiers are used to give a bipolar output range CMOS D/A converters. A CMOS converter in a unipolar appli- of -10 volt to +10 volt, as shown in the lower figure. Either cation as shown below performs an inversion of the voltage the AD2700 or AD2701 can be used, depending on the trans- reference input. Thus, use of the +10 volt AD2700 reference fer code characteristic desired. For more detailed applications will result in 2 0 to -10 volt output range. Alternatively, using information, refer to the AD7520 Data Sheet. ‘my (On -18 FOR ADz7ON) Vner- ADO ow | 10 MEGOHM 1 rsa reomce o—— A a ee Fe = =e] +e Leet V 4 flour 2 = pir ve ase) > ir 10 us) YY, ve vd V V Unipolar Binary Operation Bipolar Operation '(4-Quadrant Multiplication) DIGITAL INPUT ANALOG OUTPUT DIGITAL INPUT ANALOG OUTPUT 1 ~ ge li11d11111 Veep (1 am ESE RER EE aug (1-29) 1000000001 “Vagp (1/2 + 2°10) roooo0000n Weer 2

1000000000 Veer 1000000000 0

Ol1t111111 ~Vpep (1/2 - 21) Ouiititiyy Vag (2°) 0000000001 ~Vppp (2°10) 0000000001 Vrer (1 - 29) 0000000000 0 poncoouros VreF NOTE: 1 LSB = 2" Voge NOTE: 1 LSB = 2° Vppp Table |. Code Table — Unipolar Binary Operation Table I, Code Table — Bipolar (Offset Binary) Operation REV. B 3

USING THE AD2700 VOLTAGE REFERENCE WITH D/A CONVERTER An AD2700 Voltage Reference can be used with an inverting resistance, 2R, has virtually no influence — because the operational amplifier and an R-2R ladder network. If all bits amplifier summing point is at virtual ground — the output but the MSB are off (i.¢., grounded), the output voltage is voltage is therefore -Egpp/4. The same line of thinking can (-R/2R)Eggp. If all bits but Bit 2 are off, it can be shown be employed to show that the nth bit produces an increment that the output voltage is 4(-R/2R)Eggp = 4Egep: The of output equal to 2" Epep. lumped resistance of all the less-significant-bit circuitry (to sir 2 swrew cuoseo 8 the left of Bit 2) is 2R; the Thevenin equivalent looking ‘| TeH cu ? back from the MSB towards Bit 2 is the generator, Epgp/2, r&-7 1 4 and the series resistance 2R; since the grounded MSB series 1 i 1 3 | Aba | i o Fs | tne y Et = CWT on J lon DIGITAL INPUT CODE uss Bits BiT2 use. uv \\ L) coke Lier am aus Ei! - | anzreo | ‘ , bo + ° . Example: Contribution of Bit 2; All Other Bits “0” on ee ctak dank R ~ oumur 1 nov TERMINATION sy i ' m I a. Basic Circuit “d, H “our = -25¥ Kener ¢. Simplified Equivalent of Circuit (b.) PACKAGE DIMENSIONS Dimensions shown in inches and (mm). Tor view TT eye ee Oe TT ae ate) oeenaa| |i i) | 8aen83) saan ie e202 2 2 oN — sass ake Ak Pe DENTIFIER SaUARED OFF Hermetically sealed 14-Pin Dual-in-L ine (Gross leak tested per MIL-STD-883, Method 1014) Pin 7 is electrically connected to the case. Case has metal bottom surface. 14-Pin Dual-In-Line Metal Package aw ania < ay ve RR, z 1 8 g SaaS Ht FE nase +___, —t moe SHEE pase nen a i bits | \\ Y / SoS ower, tanta aa . 14-Pin Dual-In-Line Ceramic Package + REV. B