AS3992超高频RFID读写芯片技术规格

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"AS3992是一款超高频（UHF）RFID读写芯片，兼容EPC Class 1 Gen2标准，适用于ISO18000-6c/b900MHz的读写器系统。这款芯片由奥地利微电子公司（Austriamicrosystems）设计，具有强大的功能和灵活的编程选项，可以满足各种UHF RFID应用需求。" 在详细说明中，AS3992芯片的主要特点包括： 1. **集成模拟前端**：AS3992集成了模拟前端，负责处理射频信号，确保在UHF频段的高效工作。 2. **协议处理**：支持ISO18000-6c/b900MHz标准，意味着它可以用于全球范围内的RFID系统，兼容EPC Class 1 Gen2协议，适用于多种应用场景。 3. **多样的编程选项**：芯片内置多种编程选项，使得设备能够适应广泛的UHF RFID应用，提供了高度的灵活性。 4. **与前代产品兼容**：AS3992与之前的AS3990/91芯片在硬件引脚和固件上兼容，便于升级和维护。 5. **增强接收灵敏度**：接收灵敏度提升至-86dB，增强了在复杂环境下的读取性能，提高了读取距离和覆盖范围。 6. **RxDense Reader Mode (DRM)滤波器**：内建可编程的DRM滤波器，有助于减少干扰并优化读取性能，特别是在密集读取场景下。 7. **预失真功能**：通过预失真技术，AS3992能够改善信号质量，尤其在高功率应用中表现优秀。 8. **全可扩展性**：设计考虑了不同功率和距离的需求，可以适应长距离和高功率的应用场景。 9. **配置灵活性**：通过设置控制寄存器，可以精细调整读卡器的各种参数，以适应不同的使用环境和需求。 10. **通信接口**：提供并行或串行接口，方便主机系统（MCU）与读卡器IC之间的通信。当使用硬件编码器和解码器时，可以实现高效的传输。 AS3992芯片的设计旨在提供一种真正的全球适用解决方案，其内置的DRM过滤、增强的灵敏度和预失真功能使其在各种环境中表现出色。无论是在零售、物流、资产管理还是其他需要RFID技术的领域，AS3992都能提供可靠的性能和广泛的功能支持。

www.austriamicrosystems.com/AS3992 Revision 1.0 9 - 52

AS3992

Data Sheet - Electrical Characteristics

6 Electrical Characteristics

VEXT = 5.3V, typical values at 25ºC, unless otherwise noted.

Table 3. Electrical Characteristics

Symbol Parameter Conditions Min Typ Max Units

VEXT

Supply current without PA driver

current

EXT

Consumption

120 mA

VEXT2

Supply Current for internal PA

EXT2

Consumption,

DD_RF

= 2.5V

140 mA

STBY

Standby current 3 mA

Supply current in power-down mode

All system disabled including supply

voltage regulators

210µA

POR

Power on reset voltage (POR) 1.4 2.0 2.5 V

VDD

Regulated supply for internal circuitry

and for external MCU

3.2 3.4 3.6 V

DD_RF

Regulated supply for internal PA 1.9 2 2.1 V

VDD MIX1

Regulated supply for mixers, bit

vext_low=L

The difference between the external

supply and the regulated voltage is higher

than 250mV

4.8 5.1 V

VDD MIX2

Regulated supply for mixers, bit

vext_low=H

The difference between the external

supply and the regulated voltage is higher

than 250mV

3.7 V

PSSR

Rejection of external supply noise on

the supply regulators

The difference between the external

supply and the regulated voltage is higher

than 250mV

26 dB

RFAUX

Auxiliary output power 0 dBm

RFOUT

Internal PA output power 20 dBm

RFIN

RFIN input resistance 100 Ω

SENS-NOM

Data sensitivity Nominal mixer setting, PER=0.1% -66 dBm

SENS-GAIN

Data sensitivity Increased mixer gain, PER=0.1% -76 dBm

SENS-LBT

LBT sensitivity Maximum LBT sensitivity -86 dBm

1dB

Input 1dB compression point

Nominal mixer setting

10 dBm

IP3 Third order intercept point 21 dBm

PN200 VCO Phase noise @ 200 kHz -118 dBc/Hz

PN400

VCO Phase noise @ 400 kHz -125 dBc/Hz

REC

Recovery time after modulation Maximum LF selected 10 µs

Logic Input/Output

Max. CLK frequency 2 MHz

LOW

Input logic low 0.2

DD_IO

HIGH

Input logic high 0.8

DD_IO

Output resistance IO0…IO7 low_io = H for VDD_IO<2.7V 400 800 Ω

CL SYS

Output resistance CL SYS low_io = H for VDD_IO<2.7V 200 Ω

www.austriamicrosystems.com/AS3992 Revision 1.0 11 - 52

AS3992

Data Sheet - Detailed Description

7 Detailed Description

The RFID reader IC comprises complete analog and digital functionality for reader operation including transmitter and receiver section with

complete EPC Gen2 or ISO18000-6C digital protocol support. To integrate as many components as possible, the device also comprises an on-

board PLL section with integrated VCO, supply section, DAC and ADC section, and host interface section. In order to cover a wide range of

possibilities, there is also Configuration registers section that configures operation of all blocks.

For operation, the device needs to be correctly supplied via. VEXT and VEXT2 pins and enabled via. EN pin (Refer Supply on page 11 for

connecting to supply and Power Modes on page 12 about operation of the EN pin). At power-up, the configuration registers are preset to a

default operation mode. The preset values are described in the Configuration Registers Address Space on page 22 below each register

description table. It is possible to access and change registers to choose other options.

The communication between the reader and the transponder follows the reader talk first method. After power-up and configuring IC, the host

system starts communication by turning on the RF field by setting option bit rf_on in the ‘Chip status control register’ (00) (see Table 13) and

transmitting the first protocol command (Select in EPC Gen2). Transmitting and receiving is possible in the following two modes:

1. Normal Data Mode: In this mode, the TX and RX data is transferred through the FIFO register and all protocol data processing is done

internally.

2. Direct Data Mode: In this mode, the data processing is done by the host system.

7.1 Supply

The effective supply system of the chip decreases the influence of the supply noise and interference and thus improves de-coupling between

different building blocks. A set of 3.4V regulators is used for supplying the reference block, AD and DA converters, low frequency receiver cells,

the RF part, and digital part. It is possible to use the digital part supply VDD_D for supplying the external MCU with a current consumption up to

20mA. The input pin for the regulators is VEXT. The output pins for regulators are VDD_A, VDD_LF, VDD_D, VDD_RFP and VDD_B. Each of

the pins require stabilizing capacitors to connected ground (2.2…10µF and 10…100nF) in parallel. Depending on quality of the capacitors,

100pF could be required.

Figure 3. Mixer Supply

An additional 4.8V regulator is used for the input RF mixers supply. The input of this regulator is VEXT, output is VDD_MIX pin. For correct

operation of the 4.8V regulator, the VEXT voltage needs to be between 5.3V and 5.5V. VDD_MIX needs de-coupling capacitors to VDD_MIX like

other VDD pins.

VDD_MIX

VDD_5LFI

VDD_TXPAB

CBV5

COMP_A

COMP_B

COMN_A

COMN_B

Mixer

LDO

VEXT

receive

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