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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
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X90100
PIN CONFIGURATION
MSOP
X90100
INC
U/D
Vss
Cp
18
27
X90100
36
45
VCC
CS
N/C
Cm
FCP
31 2
4
5
67 8
X90100
XXX
VCC Limits
Blank =2.7V to 5.5V
Temperature Range
I = Industrial = –40°C to +85°C
Package
M = 8-Lead MSOP
X = 8-Bump FCP (Flipchip)
Base Part Number
X90100 ORDERING CODES
Ordering
Number
X90100M8I
X90100X8I
Ctotal
7.5pF to 14.5pF, Single Ended
7.5pF to 14.5pF, Single Ended
Package
8-lead MSOP
8-lead FCP
Temperature
Range
-40C to +85C
-40C to +85C
PIN DESCRIPTIONS
Pin Number
MSOP FCP
16
27
38
45
54
62
71
83
Symbol
INC
U/D
VSS
Cp
Cm
N/C
CS
VCC
Brief Description
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 indicat-
ed by the logic level on the U/D input.
Up/Down (U/D). The U/D input controls the direction of the trimmed capacitor value and
whether the counter is incremented or decremented.
Ground.
Cp. The high (Cp) and low (Cm) terminals of the X90100 are equivalent to the fixed ter-
minals 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.
Cm. The high (Cp) and low (Cm) terminals of the X90100 are equivalent to the fixed ter-
minals 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.
Not Connected. Must be floating.
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.
Positive Supply Voltage.
REV 1.4.7 9/8/03
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X90100
ABSOLUTE MAXIMUM RATINGS
Temperature under bias ....................–65°C to +135°C
Storage temperature .........................–65°C to +150°C
Voltage on CS, INC, U/D, CP, and
CM with respect to VSS ........................... –1V to +7V
V = |VCP–VCM| ..................................................... 5V
Lead temperature (soldering 10 seconds)..........300°C
COMMENT
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; the functional operation of
the device (at these or any other conditions above
those listed in the operational sections of this specifi-
cation) is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect
device reliability.
CAPACITOR CHARACTERISTICS (Vcc=+5V, TA=25°C, single ended mode, CM = 0V, unless otherwise stated.)
Symbol
Parameter
Limits
Min. Typ(4). Max. Unit
Test Conditions/Notes
Absolute accuracy
±15 %
VCp
VCm
C
C
Cp terminal voltage
Cm terminal voltage
Capacitance increments
Capacitance range
0
VCC
V
0
VCC
V
0.23 pF
7 pF
CTOTAL
CTOTAL
Q
Capacitance at Code=0
Capacitance at Code=31
Quality factor(5)
7.5 pF
14.5 pF
7 f=315 MHz
INL
DNL
TC1
VCC
Resolution
Absolute linearity error(1)
Relative linearity error(2)
CTOTAL Temperature Coefficient(5)
Supply Voltage
5 bits
±0.15
lsb
±0.15
lsb
±50 ppm/°C Differential Mode
2.7 5.5 V
Notes: (1) Absolute linearity is used to determine actual capacitance versus expected capacitance = C(n)(actual) — C(n) (expected) = ±0.15 Ml.
(2) Relative linearity is a measure of the error in step size between settings = C(n+1)—[C(n) + Ml] = ±0.15 Ml.
(3) lsb = least significant bit = CTOT/31.
(4) Typical values are for TA = 25°C and nominal supply voltage.
(5) This parameter is not 100% tested
REV 1.4.7 9/8/03
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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
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X90100
A.C. OPERATING CHARACTERISTICS (VCC = 5V, TA = 25°C unless otherwise specified)
Symbol
tCl
tlD
tDI
tlL(7)
tlH(7)
tlC
tCPHNS(5)
tCPHS(5)
tIW
tCYC
tR, tF(5)
tPU(5)
tR VCC(5)
tWR(5)
Parameter
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC Inactive to CS inactive
CS Deselect time (NO STORE)
CS Deselect time (STORE)
INC to CTOTAL change
INC cycle time
INC input rise and fall time
Power up to capacitance stable
VCC power-up rate
Store cycle
Min.
100
100
100
1
1
1
1
10
4
0.2
Limits
Typ.(4)
1
5
Max.
5
500
5
50
10
A.C. TIMING
Unit
ns
ns
ns
µs
µs
µs
µs
ms
µs
µs
µs
µs
V/ms
ms
CS
tCI
INC
tCYC
tIL
tIH
tIC
tID tDI
(Store)
tCPHS
90% 90%
10%
tF tR
tCPHNS
U/D
CTOTAL
tIW
MI (6)
Notes: (6) MI in the A.C. timing diagram refers to the minimum incremental change in the CTOTAL output due to a change in the counter value.
(7) tIH + tIL 4µs
REV 1.4.7 9/8/03
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