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Details, datasheet, quote on part number:X93154
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| Part: | X93154 |
| Category: | Analog & Mixed-Signal Processing => Potentiometers => Digital Potentiometers |
| Description: | Low Noise, Low Power, 32 Taps |
| Company: | Xicor, Inc. |
| Datasheet: | Download X93154 datasheet File size : 118 kB |
| Request For quote: | Find where to buy X93154
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Datasheet text preview:
APPLICATION NOTE AVAILABLE
AN20 · AN4253 · AN71 · AN73 · AN88 · AN9192 · AN99 · AN115 · AN120 · AN124 · AN133 · AN134 · AN135
Low Noise, Low Power, 32 Taps
Digitally Controlled Potentiometer (XDCPTM)
FEATURES · Solid-state potentiometer · 3-wire serial interface · 32 wiper tap points -- Wiper position stored in nonvolatile memory and recalled on power-up · 31 resistive elements -- Temperature compensated -- End to end resistance range ± 30% --Terminal voltage, 0 to VCC · Low power CMOS -- VCC = 3V±10% --Active current, 250µA max. -- Standby current, 1µA max. · High reliability -- Endurance 20,000 data changes per bit -- Register data retention, 10 years · RTOTAL value = 50K · Packages -- 8-lead MSOP, FCP DESCRIPTION
X93154
The Xicor X93154 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface. The potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. The position of the wiper element is controlled by the CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation. The device is connected as a two-terminal variable resistor and can be used in a wide variety of applications including: bias and gain control LCD Contrast Adjustment
BLOCK DIAGRAM
VCC (Supply Voltage) U/D INC CS RH Control and Memory 5-Bit Nonvolatile Memory Store and Control Recall Circuitry VCC VSS (Ground) VSS General Detailed RL 5-Bit Up/Down Counter 31 30 29 28 One of Thirty Two Decoder 2 1 0 RH
30K
Up/Down (U/D ) Increment (INC ) Device Select (CS )
Transfer Gates
Resistor Array
RL
XDCPTM is a trademark of Xicor, Inc. REV 1.3.13 6/19/03
www.xicor.com
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X93154
PIN CONFIGURATION
MSOP INC U/D RH VSS 1 2 3 4 X93154 8 7 6 5 VCC CS RL NC*
*NC can be left unconnected, or connected to any voltage between VSS and VCC.
X93154 ORDERING CODES Ordering Number
X93154UX8I-3 X93154UM8I-3
RTOTAL
50Kohm 50Kohm
Package
8-bump Flipchip package 8-lead MSOP package
Temperature Range
-40°C to +85°C -40°C to +85°C
PIN DESCRIPTIONS MSOP
1
Symbol
INC
Brief Description
Increment (INC). The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input. Up/Down (U/D). The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented. RH. The RH and RL pins of the X93154 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. Ground. No Connection. (or can be connected to any voltage between VSS and VCC.) RL. The RH and RL pins of the X93154 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. 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 X93154 will be placed in the low power standby mode until the device is selected once again. Supply Voltage.
2 3
U/D RH
4 5 6
VSS NC RL
7
CS
8
VCC
REV 1.3.13 6/19/03
www.xicor.com
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X93154
ABSOLUTE MAXIMUM RATINGS Temperature under bias ...........65°C to +135°C Storage temperature ...... 65°C to +150°C Voltage on CS, INC, U/D, RH, RL and VCC with respect to VSS ......1V to +6.5V Lead temperature (soldering 10 seconds)......... 300°C Maximum resistor current.... 2mA 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 specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS Temperature
Industrial
Min.
40°C
Max.
+85°C
Supply Voltage (VCC)
X93154
Limits
3V ±10%(8)
POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.) Limits Symbol
RTOT VR
Parameter
End to end resistance RH, RL terminal voltages Power rating Noise
Min.
35 0
Typ.
50
Max.
65 VCC 1
Unit
K V mW(7) dBV(7) mA % MI(3) MI
(3)
Test Conditions/Notes
RTOTAL =50 K Ref: 1kHz
(5) (6) (5) (6)
-120 1000 0.6 3
(1)
RW IW
Wiper Resistance Wiper Current Resolution Absolute linearity Relative linearity
(2)
±1 ±0.5 ±100 10/10/25
VH(n)(actual)VH(n)(expected) VH(n+1)[VH(n)+MI]
(7)
RTOTAL temperature coefficient CH/CL/CW Potentiometer capacitances
ppm/°C pF(7)
See circuit #3
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (VH(n)(actual)VH(n)(expected)) = ±1 Ml Maximum. n = 1 .. 29 only (2) Relative linearity is a measure of the error in step size between taps = VH(n+1)--[VH(n) + Ml] = ±0.5 Ml, n = 1 .. 29 only. (3) 1 Ml = Minimum Increment = RTOT/31. (4) Typical values are for TA = 25°C and nominal supply voltage. (5) This parameter is periodically sampled and not 100% tested (6) Typical values are for TA = 25°C and nominal supply voltage. (7) This parameter is not 100% tested. (8) When performing multiple write operations, VCC must not decrease by more than 150mV from its initial value.
REV 1.3.13 6/19/03
www.xicor.com
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