MCP33131/21/11-XX
1 Msps/500 kSPS 16/14/12-Bit Single-Ended Input SAR ADC
Features
• Sample Rate (Throughput):
- MCP33131/21/11-10: 1 Msps
- MCP33131/21/11-05: 500 kSPS
• 16/14/12-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
):
1.7V - 5.5V
- External Reference (V
REF
): 2.5V - 5.1V
• Pseudo-Differential Input Operation with
Single-Ended Configuration:
- Input Full-Scale Range: 0V to +V
REF
• Ultra Low Current Consumption (typical):
- During Input Acquisition (Standby): ~ 0.8 µA
- During Conversion:
MCP331x1-10: ~1.6 mA
MCP331x1-05: ~1.4 mA
• SPI-Compatible Serial Communication:
- SCLK Clock Rate: up to 100 MHz
• ADC Self-Calibration for Offset, Gain, and
Linearity Errors:
- During Power-Up (automatic)
- On-Demand via user’s command during
normal operation
• 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
System Design Supports
The MCP331x1-XX Evaluation Kit demonstrates the
performance of the MCP331x1-XX SAR ADC family
devices. The evaluation kit includes: (a) MCP331x1-XX
Evaluation Board, (b) PIC32MZ EF Curiosity Board for
data collection, and (c) SAR ADC Utility PC GUI.
Contact Microchip Technology Inc. for the evaluation
tools and the PIC32 MCU firmware example codes.
Package Types
V
REF
1
MSOP-10
AV
DD
2
A
IN
+ 3
A
IN
- 4
GND 5
V
REF
1
TDFN-10
AV
DD
2
A
IN
+ 3
A
IN
- 4
GND 5
Top View
Top View
10 DV
IO
9 SDI
8 SCLK
7 SDO
6 CNVST
10 DV
IO
9 SDI
8 SCLK
7 SDO
6 CNVST
MCP331x1-XX Device Offering (
Note 1):
Part Number
MCP33131-10
MCP33121-10
MCP33111-10
MCP33131-05
MCP33121-05
MCP33111-05
Note
1:
Resolution
16-bit
14-bit
12-bit
16-bit
14-bit
12-bit
Sample
Rate
1 Msps
1 Msps
1 Msps
500 kSPS
500 kSPS
500 kSPS
Input Type
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Input Range
Performance (Typical)
SNR
(dBFS)
86.7
83.5
73.8
86.7
83.5
73.8
SFDR
(dB)
98.9
98.8
95.9
98.9
98.8
95.9
THD
(dB)
-97.4
-97.2
-93.7
-97.4
-97.2
-93.7
INL
(LSB)
±2.2
±0.55
±0.12
±2.2
±0.55
±0.12
DNL
(LSB)
±0.9
±0.25
±0.06
±0.9
±0.25
±0.06
0V to 5.1V
0V to 5.1V
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.
2018 Microchip Technology Inc.
DS20006122A-page 1
MCP33131/21/11-XX
Application Diagram
2.5V to 5.1V 1.8V 1.7V to 5.5V
22Ω
V
REF
AV
DD
DV
IO
1.7 nF
A
IN
+
MCP331x1-XX
A
IN
-
GND
SDI
CNVST
SCLK
SDO
Analog Input
(0V to V
REF
)
Host Device
(PIC32MZ)
Ground Reference of
Analog Input
Description
and
MCP33131/MCP33121/MCP33111-05
are
single-ended 16, 14, 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 a 2.5V to 5.1V external
reference (V
REF
), 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.
When the device is first powered-up, it performs a
self-calibration to minimize offset, gain and linearity
errors. 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 was not fully
settled 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.
The
MCP33131/MCP33121/MCP33111-10
During Standby, most of the internal analog circuitry is
shutdown in order to reduce current consumption.
Typically, the device consumes less than 1 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 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.
DS20006122A-page 2
2018 Microchip Technology Inc.
MCP33131/MCP33121/MCP33111-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
Maximum Junction Temperature (T
J
) ....... .........................+150°C
†Notice:
Stresses above those listed under “Absolute
Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification is not
implied. Exposure to maximum rating conditions for extended
periods may affect device reliability
.
ESD protection on all pins
....
≤2kV
HBM,
≤2kV
CDM,
≤200V
MM
1.2
Electrical Specifications
KEY ELECTRICAL CHARACTERISTICS
TABLE 1-1:
Electrical Specifications:
Unless otherwise specified, all parameters apply for T
A
= -40°C to +125°C, AV
DD
= 1.8V, DV
IO
= 3.3V, V
REF
= 5V,
GND = 0V, Analog Input (V
IN
) = -1 dBFS sine wave, f
IN
= 10 kHz, C
LOAD_SDO
= 20 pF.
• MCP331x1-10: Sample Rate (f
S
) = 1 Msps, SPI Clock Input (SCLK) = 60 MHz.
• MCP331x1-05: Sample Rate (f
S
) = 500 kSPS, SPI Clock Input (SCLK) = 30 MHz.
Parameters
Power Supply Requirements
Analog Supply Voltage Range
Digital Input/Output Interface Voltage
Range
Analog Supply Current at AV
DD
pin:
During Conversion
During Standby
Digital Supply Current At DV
DD
pin:
During Output Data Reading
During Standby
Sym.
AV
DD
DV
IO
Min.
1.7
1.7
Typ.
1.8
—
Max.
1.9
5.5
Units
V
V
(Note 3)
(Note 3)
Conditions
I
DDAN
I
DDAN_STBY
I
IO_DATA
I
IO_STBY
V
REF
—
—
—
—
—
—
2.5
2.7
—
—
1.6
1.4
0.8
290
200
30
2.4
2.0
—
—
—
—
5.1
5.1
mA
mA
µA
A
A
nA
V
f
s
= 1 Msps
(MCP331x1-10)
f
s
= 500 kSPS
(MCP331x1-05)
During input acquisition (t
ACQ
)
f
s
= 1 Msps
(MCP331x1-10)
f
s
= 500 kSPS
(MCP331x1-05)
During input acquisition (t
ACQ
)
-40°C
≤
T
A
≤
85°C
85°C < T
A
≤
125°C
f
s
= 1 Msps
(MCP331x1-10)
f
s
= 500 kSPS
(MCP331x1-05)
During input acquisition (t
ACQ
)
External Reference Voltage Input
Reference Voltage
(Note 2), (Note 3)
Reference Load Current at V
REF
pin:
During Conversion
During Standby
MCP331x1-10
at 1 Msps
at 500 ksps
at 100 ksps
During Standby
MCP331x1-05
at 500 ksps
at 100 ksps
During Standby
Note
P
DISS_TOTAL
P
DISS_STBY
—
—
—
4.2
0.8
2.6
—
—
—
mW
mW
W
Averaged power for t
ACQ
+ t
CNV
During input acquisition (t
ACQ
)
P
DISS_TOTAL
P
DISS_STBY
—
—
—
—
6.2
3.1
0.6
2.6
—
—
—
—
mW
mW
mW
W
Averaged power for t
ACQ
+ t
CNV
During input acquisition (t
ACQ
)
I
REF
I
REF_STBY
450
220
240
600
360
—
µA
µA
nA
Total Power Consumption (Including AV
DD
, DV
IO
, V
REF
pins)
1:
This parameter is ensured by design and not 100% tested.
2:
This parameter is ensured by characterization and not 100% tested.
3:
Decoupling capacitor is recommended on the following pins:
(a) AV
DD
pin: 1
F
ceramic capacitor, (b) DV
IO
pin: 0.1
F
ceramic capacitor, (c) V
REF
pin: 10
F
tantalum capacitor.
4:
PSRR (dB) = -20 log (D
VOUT
/AV
DD
), where D
VOUT
= change in conversion result.
5:
ENOB = (SINAD - 1.76)/6.02
2018 Microchip Technology Inc.
DS20006122A-page 3
MCP33131/MCP33121/MCP33111-XX
TABLE 1-1:
KEY ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise specified, all parameters apply for T
A
= -40°C to +125°C, AV
DD
= 1.8V, DV
IO
= 3.3V, V
REF
= 5V,
GND = 0V, Analog Input (V
IN
) = -1 dBFS sine wave, f
IN
= 10 kHz, C
LOAD_SDO
= 20 pF.
• MCP331x1-10: Sample Rate (f
S
) = 1 Msps, SPI Clock Input (SCLK) = 60 MHz.
• MCP331x1-05: Sample Rate (f
S
) = 500 kSPS, SPI Clock Input (SCLK) = 30 MHz.
Parameters
Analog Inputs
Input Voltage Range
Input Full-Scale Voltage Range
Input Sampling Capacitance
-3dB Input Bandwidth
Aperture Delay
(Note 1)
Leakage Current at Analog Input Pin
Sym.
V
IN+
FSR
C
S
BW
-3dB
Min.
-0.1
0
—
—
—
Typ.
—
—
31
25
2.5
±2
—
—
—
—
—
±2.2
±0.55
±0.12
±0.9
±0.25
±0.06
±0.1
±0.125
±0.8
±0.8
±4
±1
±0.2
±0.35
84
60
Max.
V
REF
+0.1
+V
REF
—
—
—
±200
1
500
—
—
—
+6
+1.5
+1.8
+0.8
+0.3
±2.3
±3
±3.66
—
—
—
—
—
—
—
Units
V
V
PP
pF
MHz
ns
nA
Msps
kSPS
Bits
Bits
Bits
LSB
LSB
LSB
LSB
LSB
LSB
mV
mV
mV
V/
o
C
LSB
LSB
LSB
V/
o
C
dB
dB
(Note 4)
(Note 2)
(Note 2)
(Note 1)
(Note 1)
Conditions
Time delay between CNVST rising
edge and when input is sampled
During input acquisition (t
ACQ
)
MCP331x1-10
MCP331x1-05
MCP33131-10 and MCP33131-05
MCP33121-10 and MCP33121-05
MCP33111-10 and MCP33111-05
MCP33131-10 and MCP33131-05
MCP33121-10 and MCP33121-05
MCP33111-10 and MCP33111-05
MCP33131-10 and MCP33131-05
MCP33121-10 and MCP33121-05
MCP33111-10 and MCP33111-05
MCP33131-10 and MCP33131-05
MCP33121-10 and MCP33121-05
MCP33111-10 and MCP33111-05
MCP33131-10 and MCP33131-05
MCP33121-10 and MCP33121-05
MCP33111-10 and MCP33111-05
I
LEAK_AN_INPUT
f
s
—
—
—
16
14
12
System Performance
Sample Rate
(Throughput rate)
Resolution
(No Missing Codes)
Integral Nonlinearity
INL
-6
-1.5
Differential Nonlinearity
DNL
-0.98
-0.8
-0.3
Offset Error
—
—
Offset Error Drift with Temperature
Gain Error
G
ER
—
—
—
—
Gain Error Drift with temperature
Input Common-Mode
Rejection Ratio
Power Supply Rejection Ratio
Note
CMRR
PSRR
—
—
—
1:
This parameter is ensured by design and not 100% tested.
2:
This parameter is ensured by characterization and not 100% tested.
3:
Decoupling capacitor is recommended on the following pins:
(a) AV
DD
pin: 1
F
ceramic capacitor, (b) DV
IO
pin: 0.1
F
ceramic capacitor, (c) V
REF
pin: 10
F
tantalum capacitor.
4:
PSRR (dB) = -20 log (D
VOUT
/AV
DD
), where D
VOUT
= change in conversion result.
5:
ENOB = (SINAD - 1.76)/6.02
DS20006122A-page 4
2018 Microchip Technology Inc.
MCP33131/MCP33121/MCP33111-XX
TABLE 1-1:
KEY ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise specified, all parameters apply for T
A
= -40°C to +125°C, AV
DD
= 1.8V, DV
IO
= 3.3V, V
REF
= 5V,
GND = 0V, Analog Input (V
IN
) = -1 dBFS sine wave, f
IN
= 10 kHz, C
LOAD_SDO
= 20 pF.
• MCP331x1-10: Sample Rate (f
S
) = 1 Msps, SPI Clock Input (SCLK) = 60 MHz.
• MCP331x1-05: Sample Rate (f
S
) = 500 kSPS, SPI Clock Input (SCLK) = 30 MHz.
Parameters
Dynamic Performance
Signal-to-Noise Ratio
Sym.
SNR
Min.
Typ.
Max.
Units
Conditions
MCP33131-10 and MCP33131-05: 16-bit ADC
—
—
83.5
—
—
—
81.5
—
—
—
71.1
—
86.8
80.9
86.7
80.9
83.6
79.8
83.5
79.8
73.8
73.2
73.8
73.2
86.9
80.9
86.6
80
83.6
79.8
83.4
79.1
73.8
73.2
73.8
73
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
V
REF
= 5V, f
IN
= 1 kHz
V
REF
= 2.5V, f
IN
= 1 kHz
V
REF
= 5V, f
IN
= 10 kHz
V
REF
= 2.5V, f
IN
= 10 kHz
MCP33121-10 and MCP33121-05: 14-bit ADC
MCP33111-10 and MCP33111-05: 12-bit ADC
Signal-to-Noise and Distortion Ratio
(Note 5)
SINAD
—
—
—
—
—
—
—
—
—
—
—
—
MCP33131-10 and MCP33131-05: 16-bit ADC
MCP33121-10 and MCP33121-05: 14-bit ADC
MCP33111-10 and MCP33111-05: 12-bit ADC
Note
1:
This parameter is ensured by design and not 100% tested.
2:
This parameter is ensured by characterization and not 100% tested.
3:
Decoupling capacitor is recommended on the following pins:
(a) AV
DD
pin: 1
F
ceramic capacitor, (b) DV
IO
pin: 0.1
F
ceramic capacitor, (c) V
REF
pin: 10
F
tantalum capacitor.
4:
PSRR (dB) = -20 log (D
VOUT
/AV
DD
), where D
VOUT
= change in conversion result.
5:
ENOB = (SINAD - 1.76)/6.02
2018 Microchip Technology Inc.
DS20006122A-page 5
DSP and ARM Processors
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