D AC349 D ata Converter Line Low Power, 12-Bit CMO S D ACs FEATURES • • • • 12-bits binary or 3-decades BDC Low power: 300mW Commercial, industrial and M IL-STD-883 models 5 pin selectable output ranges DESCRIP TION The DA C349 Series are versatile, low power 12-bit D/A converters that are intended for fixed reference applications. These units combine a novel CM OS switching technique with a precision, ultra-stable thin-film ladder to achieve accurate conversion with low power drain; improved reliability and nearinstantaneous warmup are major advantages of reduced power consumption. A ll models include an internal precision reference and a gain-selectable output amplifier. The DA C349 Series offers a choice of either 12-bit binary coding (-12 models) or 3 decade BCD coding (-3D models). By external pin jumpering, the binary models can be connected for unipolar output ranges of 0 to –5V or 0 to –10V and for offset binary coded bipolar outputs of ±2.5V , ±5V and ±10V . For ratiometric applications, the units operate from an external fixed DC reference of –10V ± 10% . Both binary and BCD models are available in commercial/industrial and M IL-STD-883 Rev. C, Level B versions. The DA C349B is specified over a temperature range of –55ºC to +125ºC. Both versions operate –55ºCto +125ºC. FUNCTIONAL DIAGRAM GND GND +15V – 15V 12 11 10 10 BIPOLA R OFFSET 20V RA NGE 10 10V RA NGE 4 3 REF OUT R2 50k 6 - 10V DC REF 8 100k – + JUM PER REF IN * FOR BCD (-3D M ODELs), R1 + R2 = 80k 3 R1 50k GA IN A DJ SUM M ING JUNCTION PRECISION RESISTOR LA DDER A ND SW ITCHES 7 13 BINA RY BCD 14 BIT 12 11 (LSB) 1 2 15 16 17 10 9 8 4 8 10 18 7 19 6 20 40 20 21 5 4 22 3 23 2 24 1 (M SB) 80 100 200 400 800 (- 12 M ODELS) (- 3D M ODELS) 165Cedar Hill Street,Marlborough,MA01752 Tel:508.485.6350 Fax: 508.485.5168 www.SpectrumMicrowave.com 1 OUTPUT DAC349 SPECIFICATIO N S (Typical @+25ºC and nominal power supplies unless otherwise noted) SERIES DA C349 TY PE Fixed Reference, V oltage Output TY PICA L DIM ENSIONS 0.165 (4.191) MAX DIGITA L INPUT Resolution Unipolar Coding Bipolar Coding Logic Levels Binary BCD Input Current 12 Bits Binary (-12) or 3 Decades BCD (-3D) Binary or BCD Offset Binary Current Compliance Impedance Scale Factor 1 Unipolar Offset 1 Bipolar Offset 1 0.600 (15.24) 1 TOP V IEW 12 0 to –5V , 0 to –10 ±2.5V . ±5V , ±10V ±5mA (min) 0.1 ±0.1% of F.S.R. (max) ±0.2% of F.S.R. (max) ±0.1% of F.S.R. (max) -10V DC -10V DC ±10% @1mA ±1/2 LSB (max) ±1 LSB (max) DY NA M IC PERFORM A NCE Settling Time Slew Rate 15µS (max) 1V /µs STA BILITY A ccuracy vs Temp. 3 Linearity vs Temp. Differential Linearity vs Temp. 30ppm/ºC (max) 5ppm/ºC (max) 2ppm/ºC (max) POW ER SUPPLY V oltage @ Current Rejection Ratio Power Consumption +15V @ 5mA (nom): 10mA (max) +13V to +18V ; –15V @ 15mA (nom): 20mA (max) –13V to –18V ; 0.005% /% 375mW (max) TEM PERA TURE RA NGE Specified DA C349C DA C349B Operating, A ll models Storage, A ll models 0.100 (0.25) 13 0.025 (0.635) 0.205 (5.207) PIN FUNCTION NO. NO. PIN FUNCTION BINA RY BCD 1 OUTPUT 24 BIT 1 (M SB) 800 2 SUM M ING JCT 23 BIT 2 400 3 10V RA NGE 22 BIT 3 200 4 20 V OLT RA NGE 21 BIT 4 100 5 BIPOLA R OFFSET 20 BIT 5 80 6 GA IN A DJ 19 BIT 6 40 7 REF IN 18 BIT 7 20 8 REF OUT 17 BIT 8 10 9 – 15 16 BIT 9 8 10 +15V 15 BIT 10 4 11 GND 14 BIT 11 2 12 GND 13 BIT 1 (LSB) 1 NOTES: 1. Offset and gain are externally adjustable. See A PPLICA TIONS INFORM A TION. 2. For specified overall performance, external loading of the reference output (Pin 8) must not exceed 1.0 mA . 3. Total effect of linearity, offset and gain tempco's on the transfer characteristics of the unit. 4. In case of discrepancy between package shown in photograph and package outline dimension, the mechanical outline is correct. Specifications subject to change without notice. ORDERING INFORM A TION –25ºC –55ºC –55ºC –65ºC to to to to +85ºC +125ºC +125ºC +150ºC M ECHA NICA L Case Style 1.310 (33.274) MAX Pin 1 is marked by the dot on the top of the package STA TIC PERFORM A NCE Linearity Differential Linearity PIN (1) INDEX 0.800 (20.320) MAX REFERENCE Internal 2 External (D.C. only) 0.018 (0.451) 24 V IH =2.4V min, V IL=0.8V max, V IH =3.5V min, V IL=1.5V max, ±1µA max A NA LOG OUTPUT V oltage Range 0.010 (0.254) inch (mm) Ceramic Consult factory for application information. M ODEL DESCRIPTION DA C349C-12 DA C349C-3D DA C349B-12 DA C349B-3D Comm. 12-Bit, –25º C to +85º C Comm, 3-Decade, –25ºC to +85ºC M lL,12-Bit, –55ºC to +125ºC M IL,3-Decade, –55ºC to +125ºC CA UTION: ESD (Electro-Static Discharge) sensitive device. Permanent damage may occur when unconnected devices are subjected to high energy electrostatic fields. Unless otherwise noted, the voltage at any digital input should never exceed the supply voltage by more than 0.5 volts or go below –0.5 volts.