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X90100X8I 데이터시트 PDF




Xicor에서 제조한 전자 부품 X90100X8I은 전자 산업 및 응용 분야에서
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부품번호 X90100X8I 기능
기능 NV Electronically Programmable Capacitor
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X90100X8I 데이터시트, 핀배열, 회로
Small Packages
MSOP
Flipchip
NV Electronically Programmable Capacitor
X90100
FEATURES
• Non-volatile EEPROM storage of programmed
trim codes
• Power On Recall of capacitance setting
• High-Performance Electronically Trimmable
Capacitance
• Excellent Linearity: <0.5 LSB error
• Very Simple Digital Interface
• Fast Adjustments: 5µs max incremental change
• Eliminates the need for mechanical tuning
• Capacitance trimmable from 7.5 pF to 14.5 pF
(single-ended mode)
• Packages:
—MSOP (1.1mm x 3.0mm x 3.0mm)
—FCP (1.35mm x 1.32mm x 0.50mm)
APPLICATIONS
• Post-trim of low-cost regenerative receivers
• Tunable RF stages
• Low-cost, Low temperature drift oscillators
• Garage door openers
• Keyless entry
• Industrial wireless control
• Capacitive sensor trimming
• RFID tags
DESCRIPTION
The Xicor X90100 is a non-volatile electronically pro-
grammable capacitor. The device is programmed
through a simple digital interface. After programming,
the chosen setting for the device is retained by inter-
nal EEPROM storage whether or not DC power is
maintained. There are 32 programmable capacitance
values selectable, ranging from 7.5 pF to 14.5 pF in
0.23 pF increments, in single-ended mode. The dielec-
tric is highly stable, and the capacitance exhibits a very
low voltage coefficient. It has virtually no dielectric
absorbtion and has a very low temperature drift coeffi-
cient in differential mode (<50ppm/°C).
The X90100 is programmed through three digital inter-
face pins, which have Schmitt triggers and pullup
resistors to secure code retention. The three pins,
INC, U/D, and CS, are identical in operation to other
Xicor chips with up/down interface, such as the x9315
5-bit Digitally Controlled Potentiometer (DCP).
BLOCK DIAGRAM
Cm
CPAD
U/D
INC
1*CU
2*CU
4*CU
8*CU
16*CU
Logic and E2
Cp
CPAD
VSS
CS
REV 1.4.7 9/8/03
VCC Power On Reset
www.xicor.com
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X90100X8I pdf, 반도체, 판매, 대치품
X90100
D.C. OPERATING CHARACTERISTICS (VCC = 5V, TA = 25°C unless otherwise specified)
Limits
Symbol
Parameter
Min. Typ.(4) Max. Unit
Test Conditions
ICC1
ICC2
ISB
ILI
VCC active current (Increment)
VCC active current (Store) (EE-
PROM Store)
Standby supply current
CS, INC, U/D input leakage
current
50 100 µA CS = VIL, U/D = VIL or VIH and
INC = 0.4V @ max. tCYC
250 500 µA CS = VIH, U/D = VIL or VIH and
INC = VIH @ max. tWR
0.5 2 µA CS = VCC – 0.3V, U/D and
INC = VSS or VCC – 0.3V
-15 µA VIN = VSS
VIH
VIL
CIN(5)
CS, INC, U/D input HIGH voltage
CS, INC, U/D input LOW voltage
CS, INC, U/D input capacitance
VCC x 0.7
–0.5
VCC + 0.5 V
VCC x 0.1 V
10 pF VCC = 5V, VIN = VSS,
TA = 25°C, f = 1MHz
ENDURANCE AND DATA RETENTION (VCC = 5V, TA = 25°C unless otherwise specified)
Parameter
Min.
Unit
Minimum endurance
100,000
Data changes per bit
Data retention
100
Years
A.C. CONDITIONS OF TEST
Input pulse levels
Input rise and fall times
Input reference levels
0V to 3V
10ns
1.5V
REV 1.4.7 9/8/03
www.xicor.com
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X90100X8I 전자부품, 판매, 대치품
X90100
PIN CONFIGURATION
INC
U/D
Vss
Cp
MSOP
18
27
X90100
36
45
VCC
CS
N/C (leave floating)
Cm
DETAILED PIN DESCRIPTIONS
Cp and Cm
The high (Cp) and low (Cm) terminals of the X90100
are equivalent to the fixed terminals of a mechanical
trimmable capacitor. The minimum dc voltage is VSS
and the maximum is VCC. The value of capacitance
across the terminals is determined by digital inputs
INC, U/D, and CS.
Up/Down (U/D)
The U/D input controls the direction of the trimmed
capacitor value and whether the counter is incre-
mented or decremented. This pin has an active current
source pullup.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC
will move the capacitance value and either increment
or decrement the counter in the direction indicated by
the logic level on the U/D input. This pin has an active
current source pullup.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the
X90100 will be placed in the low power standby mode
until the device is selected once again. This pin has
active circuit source pullup.
N/C - This pin should be left floating.
PIN NAMES
Symbol
Cp
Cm
VSS
VCC
U/D
INC
CS
Default
output
output
supply
supply
pull up
pull up
pull up
Description
Positive capacitor terminal
Negative capacitor terminal
Ground
Positive supply voltage
Up/Down control input
Increment control input
Chip Select control input
PRINCIPLES OF OPERATION
There are three sections of the X90100: the input con-
trol, counter and decode section; the nonvolatile mem-
ory; and the capacitor array. The input control section
operates just like an up/down counter. The output of
this counter is decoded to turn on electronic switches
connecting internal units to the sum capacitor. Under
the proper conditions the contents of the counter can
be stored in nonvolatile memory and retained for future
use. The capacitor array is comprised of 31 individual
capacitors connected in parallel. At one end of each
element is an electronic switch that connects it to the
sum.
The capacitor, when at either end of the range, acts
like its mechanical equivalent and does not move
beyond the last position. That is, the counter does not
wrap around when clocked to either extreme.
The electronic switches on the device operate in a
“make before break” mode when the counter changes
positions. If the counter is moved several positions,
multiple units are connected to the total for tIW (INC to
CTOTAL change). The CTOTAL value for the device can
temporarily be increased by a significant amount if the
counter is moved several positions.
REV 1.4.7 9/8/03
www.xicor.com
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부품번호상세설명 및 기능제조사
X90100X8I

NV Electronically Programmable Capacitor

Xicor
Xicor

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