1 Msps/500 ksps, 14/12-Bit Single-Ended Input SAR ADC
Features
• Sample Rate (Throughput):
- MCP33151/41-10: 1 Msps
- MCP33151/41-05: 500 ksps
• 14/12-Bit Resolution with No Missing Codes
• No Latency Output
• Wide Operating Voltage Range:
- Analog supply voltage (AV
DD
): 1.8V
- Digital input/output interface voltage (DV
IO
):
1.7 - 5.5V
- External reference (V
REF
): AV
DD
-5.1V
• Pseudodifferential Input Operation with Single-
Ended Configuration:
- Input full-scale range: 0V to +V
REF
• Ultra-Low Current Consumption (typical):
- During input acquisition (standby): ~1.5 µA
- During conversion:
MCP33151/41-10: ~0.66 mA
MCP33151/41-05: ~0.33 mA
• SPI-Compatible Serial Communication:
- SCLK clock rate: up to 100 MHz
• 3-Wire with Optional BUSY Indicator
• ADC Self-Calibration for Offset, Gain, and
Linearity Errors:
- During power-up (automatic)
- On-Demand via user’s command during
normal operation
• Built-In Data Accumulator
- Integrate up to 1024 consecutive converted
samples
- Increase ENOB up to 18 bits by automatically
averaging conversion results
• AEC-Q100 Qualified:
- Temperature grade 1: -40°C to +125°C
• Package Options: MSOP-10 and TDFN-10
Typical Applications
•
•
•
•
•
•
•
High-Precision Data Acquisition
Medical Instruments
Test Equipment
Electric Vehicle Battery Management Systems
Motor Control Applications
Switch-Mode Power Supply Applications
Battery-Powered Equipment
Package Types
MSOP-10
TDFN-10*
* Includes Exposed Thermal Pad (EP); see
Table 4-1.
MCP331X1-XX Device Offering (Note
1)
Part Number
Resolution
Sample
Rate
1 Msps
1 Msps
500 kSPS
500 kSPS
Performance (Typical)
Input Type
Input Range
SNR
(dBFS)
80.4
73.3
80.4
73.3
SFDR
(dB)
103.9
102.0
102.7
99.9
THD
(dB)
-102.5
-100.4
-100.9
-99.2
INL
(LSB)
±0.39
±0.09
±0.39
±0.09
DNL
(LSB)
±0.11
±0.05
±0.11
±0.05
MCP33151-10
MCP33141-10
MCP33151-05
MCP33141-05
Note
1:
14-bit
12-bit
14-bit
12-bit
Single-Ended
Single-Ended
Single-Ended
Single-Ended
0V to 5.1V
0V to 5.1V
0V to 5.1V
0V to 5.1V
SNR, SFDR, and THD are measured with f
IN
= 10 kHz, V
IN
= -1 dBFS, V
REF
= 5.1V.
2019 Microchip Technology Inc.
DS20006220A-page 1
MCP33151/41-XX
Typical Application Diagram
AV
DD
to 5.1V
1.8V
1.8V to 5.5V
V
REF
15Ω
A
IN
+
0V to V
REF
2.2nF
MCP331x1-XX
A
IN
-
GND Reference of
Analog Input
AV
DD
DV
IO
SDI
CNVST
SCLK
SDO
(PIC32MZ)
Host Device
GND
Description
The MCP33151/41-10 and MCP33151/41-05 are
single-ended, 14-bit and 12-bit, single-channel 1 Msps
and 500 kSPS ADC family devices, respectively,
featuring
low-power
consumption
and
high
performance, using a successive approximation
register (SAR) architecture.
The device operates with an external voltage reference
(V
REF
) from AV
DD
to 5.1V, which supports a wide range
of input full-scale range from 0V to V
REF
. The reference
voltage setting is independent of the analog supply
voltage (AV
DD
) and is higher than AV
DD.
The
conversion output is available through an easy-to-use
simple SPI-compatible 3-wire interface.
The device requires a 1.8V analog supply voltage
(AV
DD
) and a 1.7V to 5.5V digital I/O interface supply
voltage (DV
IO
). The wide digital I/O interface supply
(DV
IO
) range (1.7V-5.5V) allows the device to interface
with most host devices (Master) available in the current
industry, such as the PIC32 microcontrollers, without
using external voltage level shifters.
Once all supply voltages are connected, the device will
power-up and perform an automatic calibration to
minimize offset, gain and linearity errors. The
automatic calibration takes place approximately 40 ms
following power-up, and it is necessary to ensure that
all power supplies are fully settled and stable after this
time. See
Section 4.1.1, Power-Up Sequence and
Auto-Calibration
for more details. The device
performance stays stable across the specified
temperature range. However, when extreme changes
in the operating environment, such as in the reference
voltage, are made with respect to the initial conditions
(e.g. the reference voltage did not fully settle during the
initial power-up sequence), the user may send a
recalibrate command anytime to initiate another self-
calibration to restore optimum performance.
When the initial power-up sequence is completed, the
device enters a low-current input acquisition mode,
where sampling capacitors are connected to the input
pins. This mode is called Standby.
During Standby mode, most of the internal analog
circuitry is shut down in order to reduce current
consumption. Typically, the device consumes
approximately 1.5 µA during Standby. A new
conversion is started on the rising edge of CNVST.
When the conversion is complete and the host lowers
CNVST, the output data is presented on SDO, and the
device enters Standby mode to begin acquiring the
next input sample. The user can clock out the ADC
output data using the SPI-compatible serial clock
during Standby.
The ADC system clock is generated by an internal on-
chip clock, therefore the conversion is performed
independent of the SPI serial clock (SCLK).
This device can be used for various high-speed and
high-accuracy analog-to-digital data conversion
applications, where design simplicity, low power, and
no output latency are needed.
The device is AEC-Q100 qualified for automotive
applications and operates over the extended
temperature range of -40°C to +125°C. The available
package options are Pb-free TDFN-10 and MSOP-10.
DS20006220A-page 2
2019 Microchip Technology Inc.
MCP33151/41-XX
1.0
1.1
KEY ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings†
External Analog Supply Voltage (AV
DD
) ...................................................................................................... -0.3V to 2.0V
External Digital Supply Voltage (DV
IO
)......................................................................................................... -0.3V to 5.8V
External Reference Voltage (V
REF
).............................................................................................................. -0.3V to 5.8V
Analog Inputs w.r.t GND ................................................................................................................. -0.3V to V
REF
+ 0.3V
Current at Input Pins ..............................................................................................................................................±2 mA
Current at Output and Supply Pins .................................................................................................................... ±250 mA
Storage Temperature ..............................................................................................................................-65°C to +150°C
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