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PDF CAT5401 Data sheet ( Hoja de datos )
| Número de pieza | CAT5401 | |
| Descripción | Quad Digital Potentiometer | |
| Fabricantes | ON Semiconductor | |
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CAT5401
Quad Digital
Potentiometer (POT)
with 64 Taps
and SPI Interface
Description
The CAT5401 is four digital POTs integrated with control logic and
16 bytes of NVRAM memory. Each digital POT consists of a series of
63 resistive elements connected between two externally accessible end
points. The tap points between each resistive element are connected to
the wiper outputs with CMOS switches. A separate 6-bit control
register (WCR) independently controls the wiper tap switches for each
digital POT. Associated with each wiper control register are four 6-bit
non-volatile memory data registers (DR) used for storing up to four
wiper settings. Writing to the wiper control register or any of the
non-volatile data registers is via a SPI serial bus. On power-up, the
contents of the first data register (DR0) for each of the four
potentiometers is automatically loaded into its respective wiper
control register.
The CAT5401 can be used as a potentiometer or as a two terminal,
variable resistor. It is intended for circuit level or system level
adjustments in a wide variety of applications.
Features
Four Linear Taper Digital Potentiometers
64 Resistor Taps per Potentiometer
End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
Potentiometer Control and Memory Access via SPI Interface:
Mode (0, 0) and (1, 1)
Low Wiper Resistance, Typically 100 W
Nonvolatile Memory Storage for up to Four Wiper Settings for Each
Potentiometer
Automatic Recall of Saved Wiper Settings at Power Up
2.5 to 6.0 Volt Operation
Standby Current Less than 1 mA
1,000,000 Nonvolatile WRITE Cycles
100 Year Nonvolatile Memory Data Retention
24-lead SOIC and 24-lead TSSOP
Industrial Temperature Range
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP−24
Y SUFFIX
CASE 948AR
SOIC−24
W SUFFIX
CASE 751BK
PIN CONNECTIONS
VCC
RL0
RH0
RW0
CS
WP
SI
A1
RL1
RH1
RW1
GND
1
CAT5401
SOIC−24 (W)
(Top View)
NC
RL3
RH3
RW3
A0
SO
HOLD
SCK
RL2
RH2
RW2
NC
SI
A1
RL1
RH1
RW1
GND
NC
RW2
RH2
RL2
SCK
HOLD
1
CAT5401
TSSOP−24 (Y)
(Top View)
WP
CS
RW0
RH0
RL0
VCC
NC
RL3
RH3
RW3
A0
SO
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013 − Rev. 11
1
Publication Order Number:
CAT5401/D
1 page  
CAT5401
Table 4. POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
Parameter
Test Conditions
Min Typ Max
Units
RPOT
RPOT
RPOT
RPOT
IW
RW
RW
VTERM
VN
Potentiometer Resistance (−00)
Potentiometer Resistance (−50)
Potentiometer Resistance (−10)
Potentiometer Resistance (−2.5)
Potentiometer Resistance Tolerance
RPOT Matching
Power Rating
Wiper Current
Wiper Resistance
Wiper Resistance
Voltage on any RH or RL Pin
Noise
Resolution
25C, each pot
IW = 3 mA @ VCC = 3 V
IW = 3 mA @ VCC = 5 V
VSS = 0 V
(Note 3)
100
50
10
2.5
GND
200
100
0.4
kW
kW
kW
kW
20 %
1%
50 mW
+3 mA
300 W
150 W
VCC
V
nVHz
%
Absolute Linearity (Note 4)
RW(n)(actual) − R(n)(expected)
(Note 7)
+1 LSB
(Note 6)
Relative Linearity (Note 5)
RW(n+1) − [RW(n) + LSB]
(Note 7)
+0.2
LSB
(Note 6)
TCRPOT
Temperature Coefficient of RPOT
(Note 3)
+300
ppm/C
TCRATIO
Ratiometric Temp. Coefficient
(Note 3)
20 ppm/C
CH/CL/CW Potentiometer Capacitances
(Note 3)
10/10/25
pF
fc Frequency Response
RPOT = 50 kW (Note 3)
0.4 MHz
3. This parameter is tested initially and after a design or process change that affects the parameter.
4. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
5. Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer.
It is a measure of the error in step size.
6. LSB = RTOT / 63 or (RH − RL) / 63, single pot
7. n = 0, 1, 2, ..., 63
Table 5. D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
Parameter
Test Conditions
Min Max
ICC Power Supply Current
fSCL = 2 MHz, SO = Open
Inputs = GND
1
ISB
ILI
ILO
VIL
VIH
VOL1
Standby Current (VCC = 5 V)
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage (VCC = 3 V)
VIN = GND or VCC, SO = Open
VIN = GND to VCC
VOUT = GND to VCC
IOL = 3 mA
−1
VCC x 0.7
1
10
10
VCC x 0.3
VCC + 1.0
0.4
Units
mA
mA
mA
mA
V
V
V
Table 6. PIN CAPACITANCE (Note 8)
(Available over recommended operating range from TA = 25C, f = 1.0 MHz, VCC = 5 V (unless otherwise noted).)
Symbol
Test
Conditions
COUT
CIN
Output Capacitance (SO)
Input Capacitance (CS, SCK, SI, WP, HOLD)
VOUT = 0 V
VIN = 0 V
Max
8
6
Units
pF
pF
http://onsemi.com
5
5 Page 
CAT5401
INSTRUCTION FORMAT
Table 13. READ WIPER CONTROL REGISTER (WCR)
CS DEVICE ADDRESSES
INSTRUCTION
DATA
CS
0 1 0 1 0 0 A1 A0 1 0 0 1 0 0 P1 P0 7 6 5 4 3 2 1 0
00
Table 14. WRITE WIPER CONTROL REGISTER (WCR)
CS DEVICE ADDRESSES
INSTRUCTION
DATA
CS
0 1 0 1 0 0 A1 A0 1 0 1 0 0 0 P1 P0 7 6 5 4 3 2 1 0
00
Table 15. READ DATA REGISTER (DR)
CS DEVICE ADDRESSES
INSTRUCTION
DATA
CS
0 1 0 1 0 0 A1 A0 1 0 1 1 R1 R0 P1 P0 7 6 5 4 3 2 1 0
Table 16. WRITE DATA REGISTER (DR)
CS DEVICE ADDRESSES
INSTRUCTION
DATA
CS
0 1 0 1 0 0 A1 A0 1 1 0 0 R1 R0 P1 P0 7 6 5 4 3 2 1 0
High
Voltage
Write
Cycle
Table 17. READ STATUS (WIP)
CS DEVICE ADDRESSES
0 1 0 1 0 0 A1 A0
0
INSTRUCTION
101 0 0
0
DATA
CS
1 7654321W
0000000I
P
Table 18. GLOBAL TRANSFER DATA REGISTER (DR) TO WIPER CONTROL REGISTER (WCR)
CS DEVICE ADDRESSES
INSTRUCTION
CS
0 1 0 1 0 0 A1 A0 0 0 0 1 R1 R0 0 0
Table 19. GLOBAL TRANSFER WIPER CONTROL REGISTER (WCR) TO DATA REGISTER (DR)
CS DEVICE ADDRESSES
INSTRUCTION
0 1 0 1 0 0 A1 A0 1 0 0 0 R1 R0
0
CS
0
High
Voltage
Write
Cycle
http://onsemi.com
11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet CAT5401.PDF ] | |
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