MCP45HVX1 Datasheet, PDF (1/100 Pages) Microchip Technology – Single-Resistor Network

MCP45HVX1
7/8-Bit Single, +36V (±18V) Digital POT
with I²C™ Serial Interface and Volatile Memory
Features:
• High-Voltage Analog Support:
- +36V Terminal Voltage Range (DGND = V-)
- ±18V Terminal Voltage Range
(DGND = V- + 18V)
• Wide Operating Voltage:
- Analog: 10V to 36V (specified performance)
- Digital: 2.7V to 5.5V
1.8V to 5.5V (V_L  V- + 2.7V)
• Single-Resistor Network
• Resistor Network Resolution
- 7-bit: 127 Resistors (128 Taps)
- 8-bit: 255 Resistors (256 Taps)
• R_AB Resistance Options:
- 5 k
10 k
- 50 k
100 k
• High Terminal/Wiper Current (I_W) Support:
- 25 mA (for 5 k)
- 12.5 mA (for 10 k)
- 6.5 mA (for 50 k and 100 k)
• Zero-Scale to Full-Scale Wiper Operation
• Low Wiper Resistance: 75  (typical)
• Low Tempco:
- Absolute (Rheostat): 50 ppm typical
(0°C to +70°C)
- Ratiometric (Potentiometer): 15 ppm typical
• I²C Serial Interface:
- 100 kHz, 400 kHz, 1.7 MHz,
and 3.4 MHz support
• Resistor Network Terminal Disconnect Via:
- Shutdown Pin (SHDN)
- Terminal Control (TCON) Register
• Write Latch (WLAT) Pin to Control Update of
Volatile Wiper Register (such as Zero Crossing)
• Power-On Reset/Brown-Out Reset for Both:
- Digital supply (V_L/DGND); 1.5V typical
- Analog supply (V+/V-); 3.5V typical
• Serial Interface Inactive Current (3 µA typical)
• 500 kHz Typical Bandwidth (-4 dB) Operation
(5.0 k Device)
• Extended Temperature Range (-40°C to +125°C)
• Package Types: TSSOP-14 and QFN-20 (5x5)
Package Types (Top View)
MCP45HVX1 Single Potentiometer
TSSOP (ST)
V_L 1
SCL 2
A1 3
SDA ⁴
A0 5
WLAT 6
NC 7
14 V+
13 PA0
12 PW0
11 PB0
10 V—
9 DGND
8 SHDN
QFN 5x5 (MQ)
V_L 1 ^{20 19 18 17 16 15 P0A}
SCL 2
14 P0W
A1 3
21 EP⁽¹⁾
13 P0B
SDA ₄
12 V-
A0 5
11 DGND
6 7 8 9 10
Note 1: Exposed Pad (EP)
2: NC = Not Internally Connected
Description:
The MCP45HVX1 family of devices have dual power
rails (analog and digital). The analog power rail allows
high voltage on the resistor network terminal pins. The
analog voltage range is determined by the V+ and V–
voltages. The maximum analog voltage is +36V, while
the operating analog output minimum specifications
are specified from either 10V or 20V. As the analog
supply voltage becomes smaller, the analog switch
resistances increase, which affect certain performance
specifications. The system can be implemented as dual
rail (±18V) relative to the digital logic ground (DGND).
The device also has a Write Latch (WLAT) function,
which will inhibit the volatile Wiper register from being
updated (latched) with the received data, until the
WLAT pin is Low. This allows the application to specify
a condition where the volatile Wiper register is updated
(such as zero crossing).
 2014 Microchip Technology Inc.
DS20005304A-page 1