R/2R Resistor Ladder Network Accurate voltage ratio 1:2 Precision thin film resistor network Cost, space and performance advantage Digital to analog (D/A) conversion1Analog to digital (A/D) conversion R/2R ladder network is one of the most commonly used repetitive arrangements of precision resistor networks in a ladder-like configuration. This style resistor network is ideal for digital to analog (D/A)and analog to digital (A/D) conversion. SEMICONWELL’s thin film R/2R ladder network offers precision, stability, performance and cost-effectiveness compared to discrete components or thick film networks. The typical configuration of the R/2R is an 8 bit ladder network with ±1/2LSB accuracy. Integrated passive networks are manufactured using advanced thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. Thin film resistor technology is the preferred solution for all applications that require low noise, long term stability and excellent performance at very high frequencies. Semiconwell employs proprietary thin film technologies for deposition of a wide range of sheet resistance films from 1W/sq to 10,000 W/sq. All Semiconwell's products are available in die form and are ideal for high reliability hybrid and multi chip module applications.
     
     
 
SEMICONWELL

Advanced Integrated Passive Networks

R/2R Resistor
Ladder Network

SWR2R-14

 
     
 
FEATURES   APPLICATIONS   schematic
Accurate voltage ratio 1:2
Precision thin film resistor network
Cost, space and performance advantage
Digital to analog (D/A) conversion1
Analog to digital (A/D) conversion
 
   
 
PRODUCT DESCRIPTION
R/2R ladder network is one of the most commonly used repetitive arrangements of precision resistor networks in a ladder-like configuration. This style resistor network is ideal for digital to analog (D/A)and analog to digital (A/D) conversion. SEMICONWELL’s thin film R/2R ladder network offers precision, stability, performance and cost-effectiveness compared to discrete components or thick film networks. The typical configuration of the R/2R is an 8 bit ladder network with ±1/2LSB accuracy.
 
     
 
SEMICONDUCTOR-THIN FILM MANUFACTURING PROCESS DESCRIPTION
Integrated passive networks are manufactured using advanced thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. Thin film resistor technology is the preferred solution for all applications that require low noise, long term stability and excellent performance at very high frequencies. Semiconwell employs proprietary thin film technologies for deposition of a wide range of sheet resistance films from 1W/sq to 10,000 W/sq. All Semiconwell's products are available in die form and are ideal for high reliability hybrid and multi chip module applications.
 
     
 
SUBSTRATE INFORMATION RESISTOR SPECIFICATIONS
Material Thickness (mil) Min. die size (mils) Power rating Tolerance q % Capacitance
SiO2 / Silicon 10±2 90 x 60 ±3 50 mW@70°C 1, 5, 10 <5pF
 
     
 
RESISTORS   CONDUCTORS   BACKSIDE METALS
Resistive material is ultra stable TaN with low TCR <75ppm/°C typical. For Rsq<10W/sq and Rsq>500W/sq, the resistive material is proprietary. Power rating/resistor max 100mW for R<1KW and 25mW for R>1KW. Standard tolerance is ±5%.   The bonding pads of the resistors are 3µm thick, 99.99% electroplated gold with a TiW barrier that withstands 30 min at 400°C in air without loss of adhesion.   Backside of the die is metallized with standard Si/Au compatible with eutectic and epoxy die attach. Custom metallizations are available upon special request for die products only.
 
     
 
SCHEMATIC   DIE LAYOUT
schematic   layout / design pending
 
     
 
STANDARD PRODUCTS
 
     
 
R1(W) R2(W) R  CODE SOIC-14 TSSOP-14 BARE DIE-14
1K 2K 102 SWR2R102SO14 SWR2R102TS14 SWR2R102BD14
10K 20K 103 SWR2R202SO14 SWR2R103TS14 SWR2R103BD14
25K 50K 253 SWR2R253SO14 SWR2R253TS14 SWR2R253BD14
50K 100K 503 SWR2R503SO14 SWR2R503TS14 SWR2R503BD14
 
     
 
PRICES, DELIVERY & ORDERING INFORMATION
 
     
 
 
     
 
All Semiconwell products are available in die form. Typical delivery for die products is 2-4 weeks ARO. For Chip Scale Packaged (CSP) devices consult factory for an update on availability of certain products. For all packaged devices delivery is 6-8 weeks ARO. Certain items may be available from stock. Inventory is periodically updated. For 2500pc or larger orders, all surface mount packaged devices are shipped in tape on reel (T/R). For smaller quantities, it may vary.
 
     
 
SEMICONWELL has made every effort to have this information as accurate as possible. However, no responsibility is assumed by SEMICONWELL for its use, nor for any infringements of rights of third parties which may result from its use. SEMICONWELL reserves the right to revise the content or modify its product line without prior notice. SEMICONWELL products are not authorized for and should not be used within support systems which are intended for surgical implants into the body, to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent.
 
     
 
Home Product Family Order Package Information
 
     
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Last updated: June 24, 2002