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Teilenummer | MCP4242 |
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Beschreibung | 7/8-Bit Single/Dual SPI Digital POT | |
Hersteller | Microchip Technology | |
Logo | ||
Gesamt 30 Seiten 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
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 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 SCK↑ input
71 SCK input high time
TcsA2scH
TscH
72 SCK input low time
TscL
73 Setup time of SDI input to SCK↑ edge
74 Hold time of SDI input from SCK↑ edge
77 CS Inactive (VIH) to SDO output hi-impedance
80 SDO data output valid after SCK↓ edge
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 SCK↓ edge
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 | ||
Seiten | Gesamt 30 Seiten | |
PDF Download | [ MCP4242 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
MCP4241 | 7/8-Bit Single/Dual SPI Digital POT | Microchip Technology |
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