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WMS7140 Schematic ( PDF Datasheet ) - Winbond

Teilenummer WMS7140
Beschreibung (WMS7140 / WMS7141) NONVOLATILE DIGITAL POTENTIOMETERS
Hersteller Winbond
Logo Winbond Logo 




Gesamt 23 Seiten
WMS7140 Datasheet, Funktion
PRELIMINARY
www.DataSheet4U.com
WMS7140/1
NONVOLATILE DIGITAL POTENTIOMETERS
WITH UP/DOWN (3-WIRE) INTERFACE,
10KOHM, 50KOHM, 100KOHM RESISTANCE
16 TAPS
WITH OPTIONAL OUTPUT BUFFER
Publication Release Date: April 21, 2005
- 1 - Revision 1.1






WMS7140 Datasheet, Funktion
WMS7140/1
6. PIN DESCRIPTION
TABLE 1 – PIN DESCRIPTION
Pin Name
INC
U/ D
VA
VSS
VDD
CS
VB
VW
I/O Description
Increment Control. A High-Low transition of INC when
I CS is low will move the wiper up or down for one
increment based on the U/ D input
I
Up/Down control Input. High state will cause the wiper to
move to the VB terminal, Low state to the VA terminal
- High terminal of WinPot
- Ground pin, logic ground reference
- Power Supply
Chip Select. When CS is HIGH, the part is deselected
I and the device will be in the standby mode. CS LOW
enables the part, placing it in the active power mode
- Low terminal of WinPot
Wiper terminal of WinPot (can be buffered), its position on
O the resistor array is controlled by the inputs on INC , U/ D ,
and CS
-6-

6 Page









WMS7140 pdf, datenblatt
WMS7140/1
10. ELECTRICAL CHARACTERISTICS
TABLE 12 – ELECTRICAL CHARACTERISTICS (Packaged parts)
PARAMETERS
SYMBOL
MIN.
TYP. MAX. UNITS
CONDITIONDS
Rheostat Mode
Nominal Resistance
Different Non Linearity [2]
Integral Non Linearity [2]
Tempo1
Wiper Resistance [2]
Wiper Current
Divider Mode
R
DNL
-20
-1
+20 % T=25ºC, VW open
+1 LSB
INL -1
+1 LSB
RAB/T
300 ppm/°C
RW 50 VDD=5V, I=VDD/RTotal
80 VDD=2.7V, I=VDD/RTotal
IW -1
1 mA
Resolution
Different Non Linearity [2]
Integral Non Linearity [2]
Temperature Coefficient [1]
Full Scale Error
Zero Scale Error
Resistor Terminal
N
DNL
INL
Vw/T
VFSE
VZSE
8 Bits
-1 ±0.2 +1 LSB
-1 ±0.2 +1 LSB
+20 ppm/°C Code = 80h
-1 0 LSB Code = Full Scale
0 1 LSB Code = Zero Scale
Voltage Range
Terminal Capacitance [1]
Wiper Capacitance [1]
Dynamic Characteristics [1]
VA,VB,VW
CA, CB
VSS
VDD V
30 pF
30 pF
BW10K
Bandwidth –3dB
BW50K
BW100K
Settling Time to 1 LSB
TS
Analog Output (Buffer enables)
Amp Output Current
IOUT
Amp Output Resistance
Rout
Total Harmonic Distortion [1] THD
Digital Inputs/Outputs
1.5 MHz VDD=5V, VB=VSS
300 KHz Code = 80h
200 KHz
80 100 uS
3 mA VO=1/2 scale
1 10 IL = 100uA
0.08
%
VA=2.5V, VDD=5V, f=1kHz,
VIN=1VRMS
Input High Voltage
Input Low Voltage
VIH 0.7VDD
VIL
0.3VDD
V
V
- 12 -

12 Page





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