ISL23348 Datasheet, PDF (17/19 Pages) Intersil Corporation – Quad, 128 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™)

ISL23348
Applications Information
V_LOGIC Requirements
V_LOGIC should be powered continuously during normal operation.
In a case where turning V_LOGIC OFF is necessary, it is
recommended to ground the V_LOGIC pin of the ISL23348.
Grounding the V_LOGIC pin or both V_LOGIC and V_CC does not affect
other devices on the same bus. It is good practice to put a 1µF
cap in parallel to 0.1µF as close to the V_LOGIC pin as possible.
V_CC Requirements and Placement
It is recommended to put a 1µF capacitor in parallel with 0.1µF
decoupling capacitor close to the V_CC pin.
Wiper Transition
When stepping up through each tap in voltage divider mode,
some tap transition points can result in noticeable voltage
transients, or overshoot/undershoot, resulting from the sudden
transition from a very low impedance “make” to a much higher
impedance “break” within a short period of time (<1µs). There
are several code transitions such as 0Fh to 10h, 1Fh to 20h,
which have higher transient glitch. Note, that all switching
transients will settle well within the settling time as stated in the
datasheet. A small capacitor can be added externally to reduce
the amplitude of these voltage transients. However, that will also
reduce the useful bandwidth of the circuit, thus may not be a
good solution for some applications. It may be a good idea, in
that case, to use fast amplifiers in a signal chain for fast
recovery.
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make
sure you have the latest Rev.
DATE
August 24, 2011
August 19, 2011
REVISION
FN7903.1
FN7903.0
CHANGE
Page 1 - Replace Figure 1 with Figure 1 from ISL23448
Corrected limits in Analog Spec table for INL, DNL, FSerror, ZSerror, RINL, RDNL, Roffset.
Initial release.
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address
some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product
families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil
product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on
intersil.com: ISL23348
To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff
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in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
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17
FN7903.1
August 24, 2011