AS3991-BQFT austriamicrosystems, AS3991-BQFT Datasheet - Page 28

• Manufacturer Part Number: AS3991-BQFT
• Description: IC UHF RFID READER 64-QFN
• Manufacturer: austriamicrosystems

Specifications of AS3991-BQFT

• Rf Type: Read / Write
• Frequency: 840MHz ~ 960MHz
• Features: ISO-18000-6
• Package / Case: 64-VFQFN, Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3991-BQFT; AS3991-BQFTTR

AS3990/AS3991
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
RX Wait Time (08) – Defines the time after TX when the RX input is disregarded.
Table 21. RX Wait Time (08)
1. Preset at por=H or EN=L
RX Special Setting (09)
Table 22. RX Special Setting (09)
1. Preset at por=H or EN=L
RX Special Setting2 (0A)
Table 23. RX Special Setting2 (0A)
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Gen2: 07(44.8µs < 54.25µs…84.5µs – LF:160kHz)
Gen 2:41(medium current, First stage fast settling, LF: 160kHz)
Bit
Bit
Bit
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
Signal Name
Signal Name
Signal Name
gain<5>
gain<4>
gain<3>
gain<2>
gain<1>
s_mix
Rxw7
Rxw6
Rxw5
Rxw4
Rxw3
Rxw2
Rxw1
Rxw0
RFU
fl<4>
fl<3>
fl<2>
fl<1>
1
1
1
RX settling speed up
RX Filter setting
RX gain setting
RX gain setting
Mixer input selection
RX wait time
Function
Function
Function
RFU
Revision 3.81
Defines the time during which the RX input is
ignored. It starts from the end of TX.
RX wait range is 6.4µs to 1632µs (1…255),
Step size 6.4µs,
00: receiver enabled immediately after TX.
ISO 1800-6C(Gen2)
Gen2: T1min=11.28µs…262us,
ISO 1800 - 6A: 150…1150µs
ISO 1800 - 6B: 85…460µs
reserved for future use (RFU)
First stage AC coupling speed-up (2x)
Filter opened on LF side, appropriate for FM0
00: opt. for 40kHz, 80kHz
01: opt. for 160kHz
10: opt. for 256kHz, 320kHz
11: opt. for 640kHz
Decrease in 7 steps by 3dB
Decrease in 3 steps by 5dB on the digitizer
hysteresis
0: differential input mixer
1: single ended input mixer
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