2011 Microchip Technology Inc.
DS22235B-page 1
MCP2030A
Device Features
• Three input pins for analog input signals
• High input detection sensitivity (1 mV
PP
, typical)
• High modulation depth sensitivity (as low as 8%)
• Three output selections:
- Demodulated data
- Carrier clock
- RSSI
• Input carrier frequency: 125 kHz, typical
• Input data rate: 10 Kbps, maximum
• Eight internal configuration registers
• Bidirectional transponder communication
(LF talk back)
• Programmable antenna tuning capacitance
(up to 63 pF, 1 pF/step)
• Programmable output-enable filter
• Low standby current: 6.5 µA (with three channels
enabled), typical
• Low operating current: 19 µA (with three channels
enabled), typical
• Serial Peripheral Interface (SPI) with external
devices
• Supports Battery Backup mode and batteryless
operation with external circuits
• Industrial and Extended Temperature Range:
-40°C to +85°C (industrial)
Typical Applications
• Automotive industry applications:
- Passive Keyless Entry (PKE) transponder
- Remote door locks and gate openers
- Engine immobilizer
- LF initiator sensor for tire pressure monitoring
systems
• Security Industry applications:
- Long range access control transponder
- Parking lot entry transponder
- Hands-free apartment door access
- Asset control and management
Description
The MCP2030A is a stand-alone Analog Front-End
(AFE) device for Low-Frequency (LF) sensing and bidi-
rectional communication applications. The device has
eight internal configuration registers. These registers,
with the exception of the read-only Status register, are
readable and programmable by an external device.
The device has three low-frequency input channels.
Each input channel can be individually enabled or dis-
abled. The device can detect an input signal with ampli-
tude as low as ~1 mV
PP
and can demodulate an
amplitude-modulated input signal with as low as 8%
modulation depth. The device can also transmit data by
clamping and unclamping the input LC antenna
voltage.
The device can output demodulated data, carrier clock,
or RSSI current, depending on the register setting. The
demodulated data and carrier clock outputs are avail-
able on the LFDATA pin, while the RSSI output is avail-
able on the RSSI pin. The RSSI current output is
linearly proportional to the input signal strength.
The device has programmable internal tuning capaci-
tors for each input channel. The user can program
these capacitors up to 63 pF, 1 pF per step. These
internal tuning capacitors can be used effectively for
fine-tuning of the external LC resonant circuit.
The device is optimized for very low current consump-
tion and has various battery-saving low-power modes
(Sleep, Standby, Active). The device can also be oper-
ated in Battery Backup and Batteryless modes using a
few external components.
This device is available in 14-pin PDIP, SOIC, and
TSSOP packages.
Package Types
1
2
3
4
5
6
7
14
13
12
9
11
10
8
NC
LCCOM
LCX
V
SS
LFDATA/
V
DD
LCZ
LCY
V
SS
CS
SCLK/ALERT
RSSI
NC
V
DD
CCLK/SDIO
MCP2030A
PDIP, SOIC, TSSOP
Three-Channel Analog Front-End Device
with 1 mV
PP
Input Detection Sensitivity
MCP2030A
DS22235B-page 2
2011 Microchip Technology Inc.
NOTES:
2011 Microchip Technology Inc.
DS22235B-page 3
MCP2030A
1.0
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings
(†)
Ambient temperature under bias...................-40°C to +125°C
Storage temperature .................................... -65°C to +150°C
Voltage on V
DD
with respect to V
SS
............... -0.3V to +6.5V
Voltage on all other pins with
respect to V
SS
...................................... -0.3V to (V
DD
+ 0.3V)
Maximum current out of V
SS
pin .................................300 mA
Maximum current into V
DD
pin ....................................250 mA
Maximum LC Input Voltage
(LCX, LCY, LCZ) loaded, with device........................10.0 V
PP
Maximum LC Input Voltage
(LCX, LCY, LCZ) unloaded, without device.............700.0 V
PP
Maximum Input Current (rms) into device
per LC Channel.............................................................10 mA
Human Body ESD rating....................................2000 (min.) V
Machine Model ESD rating ..................................200 (min.) V
†
Notice: Stresses above those listed under “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 operation listings of this specification is
not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Supply Voltage
V
DD
2.0
3.0
3.6
V
V
DD
Start Voltage to ensure internal
Power-on Reset (POR) signal
V
POR
—
—
1.8
V
Modulation Transistor-on Resistance
R
M
—
50
100
W
V
DD
= 3.0V
Active Current (detecting signal)
1 LC Input Channel Receiving Signal
3 LC Input Channel Receiving Signals
I
ACT
—
—
10
19
—
25
µA
µA
CS = V
DD
Input = Continuous Wave (CW);
Amplitude = 300 mV
PP
.
All channels enabled.
Standby Current (wait to detect signal)
1 LC Input Channel Enabled
2 LC Input Channels Enabled
3 LC Input Channels Enabled
I
STDBY
—
—
—
2
5
6.5
5
8
10.5
µA
µA
µA
CS = V
DD
; ALERT = V
DD
Sleep Current
I
SLEEP
—
0.2
1
µA
CS = V
DD
; ALERT = V
DD
Analog Input Leakage Current
LCX, LCY, LCZ
LCCOM
I
AIL
—
—
—
—
±1
±1
µA
µA
V
DD
= 3.6V, V
SS
V
IN
1V with respect
to ground. Internal tuning capacitors are
switched off, tested in Sleep mode.
Digital Input Low Voltage
V
IL
V
SS
—
0.3 V
DD
V
SCLK, SDI, CS
Digital Input High Voltage
V
IH
0.8 V
DD
—
V
DD
V
SCLK, SDI, CS
Digital Input Leakage Current
(3)
SDI
SCLK, CS
I
IL
—
—
—
—
1
1
µA
µA
V
DD
= 3.6V
V
SS
V
PIN
V
DD
V
PIN
V
DD
Note
1:
These parameters are characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Negative current is defined as current sourced by the pin.
MCP2030A
DS22235B-page 4
2011 Microchip Technology Inc.
Digital Output Low Voltage
ALERT, LFDATA/SDIO
V
OL
—
—
V
SS
+0.4
V
Analog Front-End section
I
OL
= 1.0 mA, V
DD
= 2.0V
Digital Output High Voltage
ALERT, LFDATA/SDIO
V
OH
V
DD
- 0.5
—
—
V
I
OH
= -400 µA, V
DD
= 2.0V
Digital Input Pull-Up Resistor
CS, SCLK
R
PU
50
200
350
k
V
DD
= 3.6V
DC ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Note
1:
These parameters are characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Negative current is defined as current sourced by the pin.
2011 Microchip Technology Inc.
DS22235B-page 5
MCP2030A
AC ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Input Sensitivity
V
SENSE
—
1
—
mV
PP
V
DD
= 3.0V
Output-enable filter disabled,
AGCSIG = 0; MODMIN = 00
(33% modulation depth setting)
Input = Continuous Wave (CW)
Output = Logic level transition
from low-to-high at sensitivity
level for CW input.
Trimmed to 1 mV
PP
input
sensitivity for all channels.
Coil de-Q-ing Voltage -
RF Limiter (R
FLM
) must be active
V
DE_Q
3
—
5
V
V
DD
= 3.0V, Force I
IN
= 5 µA
(worst-case)
RF Limiter Turn-on Resistance
(LCX, LCY, LCZ)
R
FLM
—
300
700
W
V
DD
= 2.0V, V
IN
= 8 VDC
Sensitivity Reduction
S
ADJ
—
—
0
-30
—
—
dB
dB
V
DD
= 3.0V
No sensitivity reduction selected
Max reduction selected
Monotonic increment in attenua-
tion value from setting = 0000 to
1111
by design
Minimum Modulation Depth
60% setting
33% setting
14% setting
8% setting
V
IN_MOD
—
—
—
—
60
33
14
8
84
49
26
—
%
%
%
%
V
DD
= 3.0V
See
Section 5.21 “Minimum
Modulation Depth Require-
ment for Input Signal”
.
See Modulation Depth Definition
in
Figure 5-5
.
Carrier frequency
F
CARRIER
—
125
—
kHz
Input modulation frequency
F
MOD
—
—
10
kHz
Input data rate with NRZ data for-
mat.
V
DD
= 3.0V
Minimum modulation depth set-
ting= 33%
Input conditions:
Amplitude = 300 mV
PP
Modulation depth = 100%
Note
1:
Parameter is characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Required output-enable filter high time must account for input path analog delays (= T
OEH
- T
DR
+ T
DF
).
4:
Required output-enable filter low time must account for input path analog delays (= T
OEL
+ T
DR
- T
DF
).
MCP2030A
DS22235B-page 6
2011 Microchip Technology Inc.
LCX Tuning Capacitor
C
TUNX
—
44
0
59
—
82
pF
pF
V
DD
= 3.0V,
Config. Reg. 1, bits <6:1> Setting
= 000000
63 pF ±30%
Config. Reg. 1,
bits <6:1> Setting = 111111
63 steps, approx. 1 pF/step
Monotonic increment in capaci-
tor value from setting = 000000
to 111111 by design
LCY Tuning Capacitor
C
TUNY
—
44
0
59
—
82
pF
pF
V
DD
= 3.0V,
Config. Reg. 2, bits <6:1> Setting
= 000000
63 pF ±30%
Config. Reg. 2,
bits <6:1> Setting = 111111
63 steps, approx. 1 pF/step
Monotonic increment in capaci-
tor value from setting = 000000
to 111111 by design
LCZ Tuning Capacitor
C
TUNZ
—
44
0
59
—
82
pF
pF
V
DD
= 3.0V,
Config. Reg. 3, bits<6:1> Setting
= 000000
63 pF ±30%
Config. Reg. 3, bits<6:1> Setting
= 111111
63 steps, approx. 1 pF/step
Monotonic increment in capaci-
tor value from setting = 000000
to 111111 by design
Q of Internal Tuning Capacitors
Q_C
50
(1)
—
—
Demodulator Charge Time
(delay time of demodulated output
to rise)
T
DR
—
50
—
µs
V
DD
= 3.0V
Minimum modulation depth
setting = 33%
Input conditions:
Amplitude = 300 mV
PP
Modulation depth = 100%
Demodulator Discharge Time
(delay time of demodulated output
to fall)
T
DF
—
50
—
µs
V
DD
= 3.0V
MOD depth setting = 33%
Input conditions:
Amplitude = 300 mV
PP
Modulation depth = 100%
Rise time of LFDATA
TR
LFDATA
—
0.5
—
µs
V
DD
3.0V. Time is measured
from 10% to 90% of amplitude
AC ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Note
1:
Parameter is characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Required output-enable filter high time must account for input path analog delays (= T
OEH
- T
DR
+ T
DF
).
4:
Required output-enable filter low time must account for input path analog delays (= T
OEL
+ T
DR
- T
DF
).
2011 Microchip Technology Inc.
DS22235B-page 7
MCP2030A
Fall time of LFDATA
TF
LFDATA
—
0.5
—
µs
V
DD
3.0V
Time is measured from 10% to
90% of amplitude
AGC stabilization time
(T
AGC +
T
PAGC
)
T
STAB
4
—
—
ms
AGC initialization time
T
AGC
—
3.5
—
ms
High time after AGC initialization
time
T
PAGC
—
62.5
—
µs
Gap time after AGC stabilization
time
T
GAP
200
—
—
µs
Time element of pulse
T
E
100
—
—
µs
Minimum pulse width
Time from exiting Sleep or POR to
being ready to receive signal
T
RDY
—
—
50
(1)
ms
Minimum time AGC level must be
held after receiving AGC Preserve
command
T
PRES
5
(1)
—
—
ms
AGC level must not change more
than 10% during T
PRES
Internal RC oscillator frequency
F
OSC
27
32
35.5
kHz
Internal clock trimmed at 32 kHz
during test
Inactivity timer time-out
T
INACT
13.5
16
17.75
ms
512 cycles of RC oscillator @
F
OSC
Alarm timer time-out
T
ALARM
27
32
35.5
ms
1024 cycles of RC oscillator @
F
OSC
LC Pin Input Resistance for LCX,
LCY, LCZ pins
R
IN
—
800
(1)
—
k
LCCOM grounded, V
DD
= 3V,
F
CARRIER
= 125 kHz
LC Pin Input Parasitic Capacitance
for LCX, LCY, LCZ pins
C
IN
—
24
(1)
—
pF
LCCOM grounded, V
DD
= 3V,
F
CARRIER
= 125 kHz
Minimum output-enable filter high
time
OEH (Bits Config0<8:7>
)
01
= 1 ms
10
= 2 ms
11
= 4 ms
00
= Filter Disabled
T
OEH
32 (~1 ms)
64 (~2 ms)
128 (~4 ms)
—
—
—
—
—
—
—
—
—
clock
count
RC oscillator = F
OSC
(see F
OSC
specification for variations).
Viewed from the pin input
(3)
Minimum output-enable filter low
time
OEL (Bits Config0<6:5>
)
00
= 1 ms
01
= 1 ms
10
= 2 ms
11
= 4 ms
T
OEL
32 (~1 ms)
32 (~1 ms)
64 (~2 ms)
128 (~4 ms)
—
—
—
—
—
—
—
—
clock
count
RC oscillator = F
OSC
Viewed from the pin input
(4)
AC ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Note
1:
Parameter is characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Required output-enable filter high time must account for input path analog delays (= T
OEH
- T
DR
+ T
DF
).
4:
Required output-enable filter low time must account for input path analog delays (= T
OEL
+ T
DR
- T
DF
).
MCP2030A
DS22235B-page 8
2011 Microchip Technology Inc.
Maximum output-enable filter
period
OEH OEL
T
OEH
T
OEL
01
00
= 1 ms 1 ms (Filter 1)
01
01
= 1 ms 1 ms (Filter 1)
01
10
= 1 ms 1 ms (Filter 2)
01
11
= 1 ms 1 ms (Filter 3)
10
00
= 2 ms 1 ms (Filter 4)
10
01
= 2 ms 1 ms (Filter 4)
10
10
= 2 ms 2 ms (Filter 5)
10
11
= 2 ms 4 ms (Filter 6)
11
00
= 4 ms 1 ms (Filter 7)
11
01
= 4 ms 1 ms (Filter 7)
11
10
= 4 ms 2 ms (Filter 8)
11
11
= 4 ms 4 ms (Filter 9)
00
XX
= Filter Disabled
T
OET
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
96 (~3 ms)
96 (~3 ms)
128 (~4 ms)
192 (~6 ms)
128 (~4 ms)
128 (~4 ms)
160 (~5 ms)
250 (~8 ms)
192 (~6 ms)
192 (~6 ms)
256 (~8 ms)
320 (~10 ms)
—
clock
count
RC oscillator = F
OSC
LFDATA output appears as long
as input signal level is greater
than V
SENSE
.
RSSI current output
I
RSSI
—
—
—
3
30
250
—
—
—
µA
µA
µA
V
IN
= 30 mV
PP
V
IN
= 300 mV
PP
V
IN
= 3 V
PP,
V
DD
= 3.0V
,
Linearly increases with input
signal amplitude.
RSSI current linearity
ILR
RSSI
-15
—
15
%
Tested at room temperature only
(see
Equation 5-1
and
Figure 5-7
for test method).
AC ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(2)
Max
Units
Conditions
Note
1:
Parameter is characterized but not tested.
2:
Data in “Typ” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
3:
Required output-enable filter high time must account for input path analog delays (= T
OEH
- T
DR
+ T
DF
).
4:
Required output-enable filter low time must account for input path analog delays (= T
OEL
+ T
DR
- T
DF
).
2011 Microchip Technology Inc.
DS22235B-page 9
MCP2030A
SPI TIMING
Electrical Specifications:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40C T
A
+85C
LC Signal Input
Sinusoidal 300 mV
PP
Carrier Frequency
125 kHz
LCCOM connected to V
SS
Parameters
Sym
Min
Typ
(
1
)
Max
Units
Conditions
SCLK Frequency
F
SCLK
—
—
3
MHz
CS fall to first SCLK edge setup time
T
CSSC
100
—
—
ns
SDI setup time
T
SU
30
—
—
ns
SDI hold time
T
HD
50
—
—
ns
SCLK high time
T
HI
150
—
—
ns
SCLK low time
T
LO
150
—
—
ns
SDO setup time
T
DO
—
—
150
ns
SCLK last edge to CS rise setup time T
SCCS
100
—
—
ns
CS high time
T
CSH
500
—
—
ns
CS rise to SCLK edge setup time
T
CS1
50
—
—
ns
SCLK edge to CS fall setup time
T
CS0
50
—
—
ns
SCLK edge when CS is high
Rise time of SPI data
(SPI Read command)
TR
SPI
—
10
—
ns
V
DD
3.0V. Time is measured from 10%
to 90% of amplitude
Fall time of SPI data
(SPI Read command)
TF
SPI
—
10
—
ns
V
DD
3.0V. Time is measured from 90%
to 10% of amplitude
Note
1:
Data in “Typ” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
MCP2030A
DS22235B-page 10
2011 Microchip Technology Inc.
NOTES: