MCP4901-E/P Microchip Technology, MCP4901-E/P Datasheet - Page 34
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MCP4901-E/P
Manufacturer Part Number
MCP4901-E/P
Description
DAC 8BIT SGL W/SPI 8PDIP
Manufacturer
Microchip Technology
Datasheet
1.MCP4921T-EMS.pdf
(50 pages)
Specifications of MCP4901-E/P
Number Of Converters
1
Settling Time
4.5µs
Package / Case
8-DIP (0.300", 7.62mm)
Number Of Bits
8
Data Interface
Serial, SPI™
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Number Of Dac Outputs
1
Resolution
8 bit
Interface Type
SPI
Supply Voltage (max)
6.5 V
Supply Voltage (min)
2.7 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 55 C
Supply Current
175 uA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP4901-E/P
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
MCP4901-E/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
MCP4901/4911/4921
6.9
The MCP4901/4911/4921 and MCP4902/MCP4912/
MCP4922 family devices use external reference, and
these devices are ideally suited for use as a multiplier/
divider in a signal chain. Common applications are: (a)
precision programmable gain/attenuator amplifiers and
(b) motor control feedback loops. The wide input range
(0V – V
range in Buffered mode. Its bandwidth (> 400 kHz),
selectable 1x/2x gain and low power consumption give
maximum flexibility to meet the application’s needs.
To configure the device for multiplier applications,
connect the input signal to V
the DAC’s input buffer, gain and output value. The
DAC’s output can utilize any of the examples from 6-1
to 6-6, depending on the application requirements.
Example 6-7
operate in a motor control feedback loop.
EXAMPLE 6-7:
DS22248A-page 34
DD
Using Multiplier Mode
(b) Dual Output DAC:
(a) Single Output DAC:
) is in Unbuffered mode, and near rail-to-rail
is an illustration of how the DAC can
MULTIPLIER MODE USING V
REF
MCP4922
MCP4902
MCP4912
MCP4901
MCP4911
MCP4921
and serially configure
V
REF
V OUT
SPI
3
REF
=
V
DAC
V
DD
REF
INPUT.
If the gain selection bit is configured for 1x mode
(<GA> = 1), the resulting input signal will be attenuated
by D/2
if the gain is configured for 2x mode (<GA> = 0), codes
less than 2048 attenuate the signal, while codes
greater than 2048 gain the signal.
A DAC provides significantly more gain/attenuation
resolution when compared to typical programmable
gain amplifiers. Adding an op amp to buffer the output,
as illustrated in Examples 6-2 through 6-6, extends the
output range and power to meet the precise needs of
the application.
G
Z
n
V
D
------
2
FB
. With the 12-bit DAC (MCP4921 or MCP4922),
OUT
N
n
V
V
RPM_SET
RPM
V
V
CC
2010 Microchip Technology Inc.
CC
+
–
+
–
R
sense