Date: 11/06/2009

High precision SMT resistor networks from Vishay in BGA package

Vishay has made available its new high precision bulk metal Z-foil SMT resistor networks in BGA package. This surface mount resistor network offers absolute TCR of ± 0.05 ppm/°C from 0 °C to + 60 °C and ± 0.2 ppm/°C from - 55 °C to + 125 °C, + 25 °C Ref., PCR tracking ("?R due to self heating") of ± 5 ppm at rated power, and a load life stability ratio of ± 0.01 % (100 ppm) for 2000 hours at + 70 °C.

The three new ultra-high-precision surface-mount resistor networks are 2-resistor VFB1012D voltage divider, the 3-resistor VFB1515N, and 4-resistor VFB2028N.

The BGA devices provide tight tolerance matching of ± 0.01 % and TCR tracking of 0.1 ppm/°C between multiple resistors simultaneously etched on single piece of resistor material foil

The VFB1012D, VFB1515N, and VFB2028N offer a power rating from 0.1 W per resistor at + 70 °C; a maximum working voltage of 32 V for each element; a low voltage coefficient of < 0.1 PPM/V; current noise of < - 40 dB (4); and short-time overload of = 0.01 % (100 ppm).
The devices feature a non-inductive (< 0.08 µH), non-capacitive design, and high ESD immunity, withstanding electrostatic discharges up to 25 kV, for increased reliability. They are available with lead (Pb)-free and tin/lead alloy terminations.

Available in the resistance range from 100 Ohms to 30 k Ohms with different resistance ratios and Vishay can supply any discrete resistance value with in the range as per your customized requirement.


The advantages listed by the company includes:
BGA packaging of the resistor networks virtually eliminates channel noise between the PCB to the resistive element.
These resistor devices offer almost instantaneous thermal stabilization time of < 1 second, and a nearly immeasurable 1.0-ns rise time, effectively without ringing.

Applications suggested for these resistor networks are resistor-bridge networks, voltage dividers in differential amplifiers, and ratio arms in bridge circuits for ultra-stable and high-reliability products, such as medical electronics, T&M, and military/aerospace equipment.

Samples and production quantities of the new resistor networks are available now, with lead times of six to eight weeks.