MCP4662T-502E/MF Microchip Technology, MCP4662T-502E/MF Datasheet - Page 44
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MCP4662T-502E/MF
Manufacturer Part Number
MCP4662T-502E/MF
Description
IC DGTL POT 5K 256TAPS 10-DFN
Manufacturer
Microchip Technology
Datasheet
1.MCP4541T-502EMF.pdf
(92 pages)
Specifications of MCP4662T-502E/MF
Package / Case
10-DFN
Taps
257
Resistance (ohms)
5K
Number Of Circuits
2
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Non-Volatile
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Resistance In Ohms
5K
Number Of Pots
Dual
Taps Per Pot
256
Resistance
5 KOhms
Wiper Memory
Non Volatile
Digital Interface
Serial (2-Wire, I2C)
Operating Supply Voltage
2.5 V, 3.3 V, 5 V
Supply Current
2.5 uA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
MCP4662T-502E/MFTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP4662T-502E/MF
Manufacturer:
Microchip
Quantity:
3 090
MCP454X/456X/464X/466X
5.2
Each tap point (between the R
connection point for an analog switch. The opposite
side of the analog switch is connected to a common
signal which is connected to the Terminal W (Wiper)
pin.
A value in the volatile wiper register selects which
analog switch to close, connecting the W terminal to
the selected node of the resistor ladder.
The wiper can connect directly to Terminal B or to
Terminal A. A zero-scale connections, connects the
Terminal W (wiper) to Terminal B (wiper setting of
000h). A full-scale connections, connects the Terminal
W (wiper) to Terminal A (wiper setting of 100h or 80h).
In these configurations the only resistance between the
Terminal W and the other Terminal (A or B) is that of
the analog switches.
A wiper setting value greater than full-scale (wiper
setting of 100h for 8-bit device or 80h for 7-bit devices)
will also be a Full-Scale setting (Terminal W (wiper)
connected to Terminal A).
wiper setting map.
Equation 5-2
mine the resistance between the wiper and terminal B.
EQUATION 5-2:
TABLE 5-1:
DS22107A-page 44
7-bit Pot 8-bit Pot
3FFh
081h
080h
07Fh
041h
040h
03Fh
001h
000h
Wiper Setting
N = 0 to 256 (decimal)
N = 0 to 128 (decimal)
R
R
Wiper
WB
WB
=
=
illustrates the calculation used to deter-
3FFh
0FFh
101h
100h
080h
07Fh
000h
081
001
R
------------- -
(
R
------------- -
(
256
128
AB
AB
VOLATILE WIPER VALUE VS.
WIPER POSITION MAP
N
N
)
)
+
+
R
Reserved (Full-Scale (W = A)),
Increment and Decrement
commands ignored
Full-Scale (W = A),
Increment commands ignored
W = N
W = N (Mid-Scale)
W = N
Zero Scale (W = B)
Decrement command ignored
WB
R
R
W
W
Table 5-1
CALCULATION
Properties
8-bit Device
7-bit Device
S
illustrates the full
resistors) is a
5.3
The MCP4XXX device’s WiperLock technology allows
application-specific calibration settings to be secured in
the EEPROM without requiring the use of an additional
write-protect pin. There are two WiperLock Technology
configuration bits (WL0 and WL1). These bits prevent
the Non-Volatile and Volatile addresses and bits for the
specified resistor network from being written.
The WiperLock technology prevents the serial
commands from doing the following:
• Changing a volatile wiper value
• Writing to a non-volatile wiper memory location
• Changing the volatile TCON register value
For either Resistor Network 0 or Resistor Network 1
(Potx), the WLx bit controls the following:
• Non-Volatile Wiper Register
• Volatile Wiper Register
• Volatile TCON register bits RxHW, RxA, RxW,
High Voltage commands are required to enable and
disable WiperLock. Please refer to the
Protect or WiperLock Technology (High Voltage)
command for operation.
5.3.1
The WiperLock Technology state is not affected by a
POR/BOR event. A POR/BOR event will load the
Volatile Wiper register value with the Non-Volatile
Wiper register value, refer to Section 4.1.
and RxB
WiperLock™ Technology
POR/BOR OPERATION WHEN
WIPERLOCK TECHNOLOGY
ENABLED
© 2008 Microchip Technology Inc.
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