Three-Channel Analog Front-End Device

www.DataSheet4U.com MCP2030 Three-Channel Analog Front-End Device Device Features: • • • • Three input pins for analog input signals High input detection sensitivity (3 mVPP, 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 8 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: 4 μA (with 3 channels enabled), typical Low operating current: 13 μA (with 3 channels enabled), typical Serial Peripheral Interface (SPI™) with external devices Supports Battery Back-Up mode and batteryless operation with external circuits Industrial and Extended Temperature Range: -40°C to +85°C (industrial) Description: The MCP2030 is a stand-alone Analog Front-End (AFE) device for Low-Frequency (LF) sensing and bidirectional communication applications. The device has eight internal Configuration registers which are readable and programmable, except the read-only STATUS register, by an external device. The device has three low-frequency input channels. Each input channel can be individually enabled or disabled. 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 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 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 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 consumption and has various battery-saving low-power modes (Sleep, Standby, Active). The device can also be operated in Battery Back-up and Batteryless modes using a few external components. This device is available in 14-pin PDIP, SOIC, and TSSOP packages. This device is also used as the AFE in the PIC16F639. • • • • • • • • • • • 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 Package Types: MCP2030 PDIP, SOIC, TSSOP VSS CS SCLK/ALERT RSSI LFDATA/ CCLK/SDIO VDD 1 2 3 4 NC 5 6 7 14 13 VSS LCCOM 12 NC LCX 11 10 9 8 LCY LCZ VDD © 2005 Microchip Technology Inc. DS21981A-page 1 MCP2030 NOTES: DS21981A-page 2 © 2005 Microchip Technology Inc. MCP2030 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 VDD with respect to VSS ............... -0.3V to +6.5V Voltage on all other pins with respect to VSS ...................................... -0.3V to (VDD + 0.3V) Maximum current out of VSS pin .................................300 mA Maximum current into VDD pin ....................................250 mA Maximum LC Input Voltage (LCX, LCY, LCZ) loaded, with device........................ 10.0 VPP Maximum LC Input Voltage (LCX, LCY, LCZ) unloaded, without device............. 700.0 VPP 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 Characteristics Electrical Specifications: Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C LC Signal Input Sinusoidal 300 mVPP Carrier Frequency 125 kHz LCCOM connected to VSS Parameters Supply Voltage VDD Start Voltage to ensure internal Power-on Reset signal Modulation Transistor-on Resistance Active Current (detecting signal) 1 LC Input Channel Receiving Signal 3 LC Input Channel Receiving Signals Standby Current (wait to detect signal) 1 LC Input Channel Enabled 2 LC Input Channels Enabled 3 LC Input Channels Enabled Sleep Current Analog Input Leakage Current LCX, LCY, LCZ LCCOM Digital Input Low Voltage Digital Input High Voltage Digital Input Leakage Current (Note 1) SDI SCLK, CS Digital Output Low Voltage ALERT, LFDATA/SDIO Digital Output High Voltage ALERT, LFDATA/SDIO Digital Input Pull-Up Resistor CS, SCLK * † 1: Sym. VDD VPOR RM IACT — — ISTDBY — — — ISLEEP IAIL — — VIL VIH IIL — — VOL — VOH VDD - 0.5 RPU 50 — 200 — 350 V kΩ — VSS + 0.4 V — — VSS 0.8 VDD — — — — — 2 3 4 0.2 5 6 7 1 ±1 ±1 0.3 VDD VDD ±1 ±1 10 13 — 18 Min. 2.0 — — Typ† 3.0 — 50 Max. 3.6 1.8 100 Units V V Ω VDD = 3.0V CS = VDD Input = Continuous Wave (CW); Amplitude = 300 mVPP. All channels enabled. CS = VDD; ALERT = VDD Conditions μA μA μA μA μA μA μA μA V V CS = VDD; ALERT = VDD VDD = 3.6V, VSS ≤ VIN ≤ 1V with respect to ground. Internal tuning capacitors are switched off, tested in Sleep mode. SCLK, SDI, CS SCLK, SDI, CS VDD = 3.6V VSS ≤ VPIN ≤ VDD VPIN ≤ VDD Analog Front-End section IOL = 1.0 mA, VDD = 2.0V IOH = -400 μA, VDD = 2.0V VDD = 3.6V μA μA Note These parameters are 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. Negative current is defined as current sourced by the pin. © 2005 Microchip Technology Inc. DS21981A-page 3 MCP2030 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 LC Signal Input Sinusoidal 300 mVPP Carrier Frequency 125 kHz LCCOM connected to VSS Parameters Input Sensitivity Sym. VSENSE 1 3.0 6 mVPP Min. Typ† Max. Units Conditions 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. VDD = 3.0V, Force IIN = 5 μA (worst case) VDD = 2.0V, VIN = 8 VDC VDD = 3.0V No sensitivity reduction selected Max. reduction selected Monotonic increment in attenuation value from setting = 0000 to 1111 by design VDD = 3.0V See Section 5.21 “Minimum Modulation Depth Requirement for Input Signal”. See Modulation Depth Definition in Figure 5-5. Coil de-Q’ing Voltage RF Limiter (RFLM) must be active RF Limiter Turn-on Resistance (LCX, LCY, LCZ) Sensitivity Reduction VDE_Q RFLM SADJ 3 — — 300 5 700 V Ω — — 0 -30 — — dB dB Minimum Modulation Depth 60% setting 33% setting 14% setting 8% Carrier frequency Input modulation frequency VIN_MOD — — — FCARRIER FMOD — — 60 33 14 8 125 — 84 49 26 — 10 % % % % kHz kHz Input data rate with NRZ data format. VDD = 3.0V Minimum modulation depth setting = 33% Input conditions: Amplitude = 300 mVPP Modulation depth = 100% VDD = 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 capacitor value from setting = 000000 to 111111 by design VDD = 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 capacitor value from setting = 000000 to 111111 by design VDD = 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 capacitor value from setting = 000000 to 111111 by design LCX Tuning Capacitor CTUNX — 44 0 59 — 82 pF pF LCY Tuning Capacitor CTUNY — 44 0 59 — 82 pF pF LCZ Tuning Capacitor CTUNZ — 44 0 59 — 82 pF pF Q of Internal Tuning Capacitors Demodulator Charge Time (delay time of demodulated output to rise) Q_C TDR 50 * — — 50 — — μs VDD = 3.0V Minimum modulation depth setting = 33% Input conditions: Amplitude = 300 mVPP Modulation depth = 100% Note * † 1: 2: 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). DS21981A-page 4 © 2005 Microchip Technology Inc. MCP2030 AC Characteristics (Continued) 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 LC Signal Input Sinusoidal 300 mVPP Carrier Frequency 125 kHz LCCOM connected to VSS Parameters Demodulator Discharge Time (delay time of demodula