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MCP4131 Schematic ( PDF Datasheet ) - Microchip Technology

Teilenummer MCP4131
Beschreibung 7/8-Bit Single/Dual SPI Digital POT
Hersteller Microchip Technology
Logo Microchip Technology Logo 




Gesamt 70 Seiten
MCP4131 Datasheet, Funktion
MCP413X/415X/423X/425X
7/8-Bit Single/Dual SPI Digital POT with Volatile Memory
Features
• Single or Dual Resistor Network options
• Potentiometer or Rheostat configuration options
• Resistor Network Resolution
- 7-bit: 128 Resistors (129 Steps)
- 8-bit: 256 Resistors (257 Steps)
• RAB Resistances options of:
- 5 kΩ
- 10 kΩ
- 50 kΩ
- 100 kΩ
• Zero Scale to Full Scale Wiper operation
• Low Wiper Resistance: 75Ω (typ.)
• Low Tempco:
- Absolute (Rheostat): 50 ppm typical
(0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
• SPI Serial Interface (10 MHz, modes 0,0 & 1,1)
- High-Speed Read/Writes to wiper registers
- SDI/SDO multiplexing (MCP41X1 only)
• Resistor Network Terminal Disconnect Feature
via:
- Shutdown pin (SHDN)
- Terminal Control (TCON) Register
• Brown-out reset protection (1.5V typical)
• Serial Interface Inactive current (2.5 uA typ.)
• High-Voltage Tolerant Digital Inputs: Up to 12.5V
• Supports Split Rail Applications
• Internal weak pull-up on all digital inputs
• Wide Operating Voltage:
- 2.7V to 5.5V - Device Characteristics
Specified
- 1.8V to 5.5V - Device Operation
• Wide Bandwidth (-3 dB) Operation:
- 2 MHz (typ.) for 5.0 kΩ device
• Extended temperature range (-40°C to +125°C)
Description
The MCP41XX and MCP42XX devices offer a wide
range of product offerings using an SPI interface. This
family of devices support 7-bit and 8-bit resistor
networks, and Potentiometer and Rheostat pinouts.
Package Types
MCP41X1
Single Potentiometer
MCP41X2
Single Rheostat
CS
SCK
SDI/SDO
VSS
1
2
3
4
8
7
VDD
P0B
6 P0W
5 P0A
PDIP, SOIC, MSOP,
3x3 DFN
CS
SCK
SDI
VSS
1
2
3
4
8
7
VDD
SDO
6 P0B
5 P0W
PDIP, SOIC, MSOP,
3x3 DFN
MCP42X1 Dual Potentiometers
CS
SCK
SDI
VSS
P1B
P1W
P1A
1
2
3
4
5
6
7
14 VDD
13 SDO
12 SHDN
11 NC
10 P0B
9 P0W
8 P0A
PDIP, SOIC, TSSOP
SCK
SDI
VSS
VSS
116 15 14 1312
2 11
3 10
49
5678
NC
NC
P0B
P0W
4x4 QFN
MCP42X2 Dual Rheostat
CS
SCK
SDI
VSS
P1B
1
2
3
4
5
10
9
VDD
SDO
8 P0B
7 P0W
6 P1W
MSOP, DFN
© 2007 Microchip Technology Inc.
DS22060A-page 1






MCP4131 Datasheet, Funktion
MCP413X/415X/423X/425X
AC/DC CHARACTERISTICS (CONTINUED)
DC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C TA +125°C (extended)
All parameters apply across the specified operating ranges unless noted.
VDD = +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for VDD = 5.5V, TA = +25°C.
Parameters
Sym
Min Typ Max Units
Conditions
Full-Scale Error
(MCP4XX1 only)
(8-bit code =
100h,
7-bit code = 80h)
VWFSE
Zero-Scale Error
(MCP4XX1 only)
(8-bit code = 00h,
7-bit code = 00h)
VWZSE
-6.0 -0.1 — LSb 5 kΩ 8-bit 3.0V VDD 5.5V
-4.0 -0.1 — LSb
7-bit 3.0V VDD 5.5V
-3.5 -0.1 — LSb 10 kΩ 8-bit 3.0V VDD 5.5V
-2.0 -0.1 — LSb
7-bit 3.0V VDD 5.5V
-0.8 -0.1 — LSb 50 kΩ 8-bit 3.0V VDD 5.5V
-0.5 -0.1 — LSb
7-bit 3.0V VDD 5.5V
-0.5 -0.1 — LSb 100 kΩ 8-bit 3.0V VDD 5.5V
-0.5 -0.1 — LSb
7-bit 3.0V VDD 5.5V
+0.1
+6.0
LSb 5 kΩ 8-bit 3.0V VDD 5.5V
— +0.1 +3.0 LSb
7-bit
+0.1
+3.5
LSb 10 kΩ 8-bit 3.0V VDD 5.5V
— +0.1 +2.0 LSb
7-bit
+0.1
+0.8
LSb 50 kΩ 8-bit 3.0V VDD 5.5V
— +0.1 +0.5 LSb
7-bit
+0.1
+0.5
LSb 100 kΩ 8-bit 3.0V VDD 5.5V
— +0.1 +0.5 LSb
7-bit
Potentiometer
Integral
Non-linearity
INL -1 ±0.5 +1 LSb 8-bit 3.0V VDD 5.5V
-0.5 ±0.25 +0.5 LSb 7-bit MCP4XX1 devices only
(Note 2)
Potentiometer
Differential
Non-linearity
DNL
-0.5
-0.25
±0.25 +0.5
±0.125 +0.25
LSb 8-bit
LSb 7-bit
3.0V VDD 5.5V
MCP4XX1 devices only
(Note 2)
Bandwidth -3 dB
(See Figure 2-64,
load = 30 pF)
BW
— 2 — MHz 5 kΩ 8-bit Code = 80h
— 2 — MHz
7-bit Code = 40h
— 1 — MHz 10 kΩ 8-bit Code = 80h
— 1 — MHz
7-bit Code = 40h
— 200 — kHz 50 kΩ 8-bit Code = 80h
— 200 — kHz
7-bit Code = 40h
— 100 — kHz 100 kΩ 8-bit Code = 80h
— 100 — kHz
7-bit Code = 40h
Note 1: Resistance is defined as the resistance between terminal A to terminal B.
2: INL and DNL are measured at VW with VA = VDD and VB = VSS.
3: MCP4XX1 only.
4: MCP4XX2 only, includes VWZSE and VWFSE.
5: Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
6: This specification by design.
7: Non-linearity is affected by wiper resistance (RW), which changes significantly over voltage and
temperature.
8: The MCP4XX1 is externally connected to match the configurations of the MCP41X2 and MCP42X2, and
then tested.
9: POR/BOR is not rate dependent.
10: Supply current is independent of current through the resistor network.
DS22060A-page 6
© 2007 Microchip Technology Inc.

6 Page









MCP4131 pdf, datenblatt
MCP413X/415X/423X/425X
CS
SCK
VIH
82
70
SDO
71
MSb
VIHH
VIL
72 80
BIT6 - - - - - -1
LSb
VIH
84
83
75, 76
73
SDI
MSb IN
BIT6 - - - -1
LSb IN
FIGURE 1-2:
74
SPI Timing Waveform (Mode = 00).
TABLE 1-2: SPI REQUIREMENTS (MODE = 00)
# Characteristic
SCK Input Frequency
Symbol
FSCK
70 CS Active (VIL or VIHH) to SCKinput
71 SCK input high time
TcsA2scH
TscH
72 SCK input low time
TscL
73 Setup time of SDI input to SCKedge
74 Hold time of SDI input from SCKedge
77 CS Inactive (VIH) to SDO output hi-impedance
80 SDO data output valid after SCKedge
TDIV2scH
TscH2DIL
TcsH2DOZ
TscL2DOV
Min
60
45
500
45
500
10
20
82 SDO data output valid after
CS Active (VIL or VIHH)
83 CS Inactive (VIH) after SCKedge
84 Hold time of CS Inactive (VIH) to
CS Active (VIL or VIHH)
Note 1: This specification by design.
TssL2doV
TscH2csI
TcsA2csI
100
1
50
77
Max Units
Conditions
10 MHz VDD = 2.7V to 5.5V
1 MHz VDD = 1.8V to 2.7V
— ns
— ns VDD = 2.7V to 5.5V
— ns VDD = 1.8V to 2.7V
— ns VDD = 2.7V to 5.5V
— ns VDD = 1.8V to 2.7V
— ns
— ns
50 ns Note 1
70 ns VDD = 2.7V to 5.5V
170 ns VDD = 1.8V to 2.7V
70 ns
— ns VDD = 2.7V to 5.5V
ms VDD = 1.8V to 2.7V
— ns
DS22060A-page 12
© 2007 Microchip Technology Inc.

12 Page





SeitenGesamt 70 Seiten
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