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PDF MCP2035 Data sheet ( Hoja de datos )
| Número de pieza | MCP2035 | |
| Descripción | Analog Front-End Device | |
| Fabricantes | Microchip | |
| Logotipo |  |
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MCP2035
Analog Front-End Device for BodyCom Applications
Device Features:
• Single Analog Input Pin for Signal Detection
• High Input Detection Sensitivity (3 mVPP, typical)
• High Modulation Depth Sensitivity (as low as 8%)
• Three Output Type Selections:
- Demodulated Data
- Carrier Clock
- Received Signal Strength Indicator (RSSI)
• Input Carrier Frequency: 125 kHz, typical
• Input Data Rate: 10 Kbps, maximum
• 8 Internal Configuration Registers
• Bidirectional Transponder Communication via the
same input pin (LF talk-back)
• Programmable Antenna Tuning Capacitance
(up to 63 pF, 1 pF/step)
• Programmable Output Enable Filter
• Low Standby Current: 2 µA, typical
• Low Operating Current: 10 µA, typical
• Serial Peripheral Interface (SPI) with external
devices
• Industrial and Extended Temperature Range:
-40°C to +85°C (Industrial)
Typical Applications:
• BodyCom Applications
• Security Industry Applications
• Automotive Industry Applications
Description:
The MCP2035 is a single-channel, stand-alone Analog
Front-End (AFE) device for low-frequency (LF) signal
detection and low-power short range transponder
applications, such as BodyCom communications.
The device can detect an input signal with amplitude as
low as ~1 mVPP, and can demodulate an amplitude-
modulated input signal with as low as 8% modulation
depth. The device can also transmit data (LF talk-back)
by clamping and unclamping the input LC antenna
voltage.
The device can output demodulated data, carrier clock
or RSSI current, depending on the output-type
selection configuration register bit settings. The
demodulated data and carrier clock outputs are
available on the LFDATA pin, while the RSSI output is
available on the RSSI pin. The RSSI current output is
linearly proportional to the input signal strength.
The device has programmable internal tuning
capacitors for the input channel. The user can program
the input tuning capacitors up to 63 pF, 1 pF per step.
The internal tuning capacitors can be used effectively
for fine-tuning of the external LC resonant circuit.
The device has eight volatile internal configuration
registers for dynamic configurations of the device
operation on-the-fly. All registers are readable and
programmable using the serial SPI commands, except
the read-only STATUS register.
The device is optimized for very low current
consumption and has various battery-saving low-
power modes (Sleep, Standby, Active).
This device is available in a 14-pin TSSOP package.
Package Type:
MCP2035
TSSOP
VSS
CS
SCLK/ALERT
RSSI
NC
LFDATA/
CCLK/SDIO
VDD
1
2
3
4
5
6
7
14 VSS
13 LCCOM
12 NC
11 LCX
10 NC
9 NC
8 VDD
2012 Microchip Technology Inc.
DS22304A-page 1
1 page  
AC CHARACTERISTICS
Electrical Specifications: Standard Operating Conditions (unless otherwise stated), Supply Voltage: 2.0V VDD 3.6V, Operating temperature: -40°C TA +85°C,
LCCOM connected to VSS, LCX Input Signal: Sinusoidal 300 mVPP, Carrier Frequency = 125 kHz, Bits <3:1> of Configuration Register 0: LCXEN = 0, LCZEN =
LCYEN = 1.
Parameters
Sym.
Min.
Typ(2)
Max.
Units
Conditions
Input Sensitivity
VSENSE 1 3.0
6 mVPP VDD = 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.
Coil de-Q’ing Voltage - RF Limiter (RFLM)
VDE_Q
3
—
5
V VDD = 3.0V, Force IIN = 5 A
must be active
(worst case)
RF Limiter Turn-on Resistance at LCX pin
Sensitivity Reduction
RFLM
SADJ
— 300 700
Ω VDD = 2.0V, VIN = 8 VDC
—0
— dB VDD = 3.0V
— -30 — dB No sensitivity reduction selected
Maximum reduction selected
Monotonic increment in attenuation value from setting
= 0000 to 1111 by design
Minimum Modulation Depth
60% setting
33% setting
14% setting
8%
VIN_MOD
—
60
84
% VDD = 3.0V
— 33 49 % See Section 5.20 “Minimum Modulation Depth
— 14
26
%
Requirement for Input Signal”.
See Modulation Depth Definition in Figure 5-5.
8%
Carrier frequency
Input modulation frequency
FCARRIER
—
125
— kHz
FMOD
——
10 kHz Input data rate with NRZ data format.
VDD = 3.0V
Minimum modulation depth setting = 33%
Input conditions:
Amplitude = 300 mVPP
Modulation depth = 100%
Note 1:
2:
3:
4:
Parameter is characterized but not tested.
Data in “Typ.” column is at 3.0V, +25°C unless otherwise stated. These parameters are for design guidance only and are not tested.
Required output enable filter high time must account for input path analog delays (= TOEH - TDR + TDF).
Required output enable filter low time must account for input path analog delays (= TOEL + TDR - TDF).
5 Page 
MCP2035
2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, VDD = 3V, Carrier Frequency = 125 kHz, LCCOM = connected to VSS, TA = +25°C.
Standby Current (LCX Channel Enabled)
2.5
+85oC
2
+25oC
1.5 -40oC
1
0.5
0
2V
FIGURE 2-1:
3V
VDD (V)
3.6 V
Typical Standby Current.
50.0%
45.0%
40.0%
35.0%
30.0%
25.0%
20.0%
15.0%
10.0%
5.0%
0.0%
VDD = 2.0V
-40C
25C
85C
Oscillator Frequency (kHz)
FIGURE 2-4:
Oscillator Frequency
Histograms vs. Temperature, VDD = 2V.
Active Current (LCX Channel Enabled)
9
+85oC
8 +25oC
7 -40oC
6
5
4
3
2
1
0
2 V 3 V 3.6 V
VDD (V)
FIGURE 2-2:
Typical Active Current.
50.0%
45.0%
40.0%
35.0%
30.0%
25.0%
20.0%
15.0%
10.0%
5.0%
0.0%
VDD = 3.6V
-40C
25C
85C
Oscillator Frequency (kHz)
FIGURE 2-5:
Oscillator Frequency
Histograms vs. Temperature at VDD = 3V.
35
34
33
Osc. Freq. @ VDD = 3.6V
32
31
30 Osc. Freq. @ VDD = 2.0V
29
-50 -25
0 25 50 75
Temperature (°C)
100 125
FIGURE 2-3:
Oscillator Frequency vs.
Temperature, VDD = 3.6V and 2.0V.
12
10
8
6
4
2
0
0 200 400 600
Unloaded Coil Voltage (VPP)
FIGURE 2-6:
De-Q’ed Voltage vs.
Unloaded Coil Voltage.
800
2012 Microchip Technology Inc.
DS22304A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP2035.PDF ] | |
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