TH7122 Datasheet, PDF (28/44 Pages) Melexis Microelectronic Systems – 27 to 930MHz FSK/FM/ASK Transceiver

TH7122
27 to 930MHz
FSK/FM/ASK Transceiver
Parameter
Symbol
Condition
Min
Typ
Max Unit
Digital pin characteristics
Pull-down Resistor
pins IN_DTA , RE/SCLK,
R_PD
TE/SDTA
Low level input leakage current
pins IN_DTA, ASK/FSK,
RE/SCLK, TE/SDTA, FS0/SDEN,
I_IL
FS1/LD
High level input leakage current
pins ASK/FSK, FS0/SDEN,
I_IH
FS1/LD
I_{INL_FS1/LD} only
in Stand-alone user
mode
I_{INH_FS1/LD} only
in Stand-alone user
mode
70
120
220
kΩ
-2
μA
2
μA
Analog pin characteristics
MOS switch On resistance
FSK_SW pin
Transmit mode,
if Reg. DTAPOL = 0:
R_ON
IN_DTA = 0
if Reg. DTAPOL = 1:
IN_DTA = 1
10
30
MΩ
MOS switch Off resistance
Transmit mode,
FSK_SW pin
if Reg. DTAPOL = 0:
R_OFF
IN_DTA = 1
1
MΩ
if Reg. DTAPOL = 1:
IN_DTA = 0
Peak detector pull-up current
ASK Receive mode,
INT2/PDO pin
I_{PU_PDO}
Reg. PKDET = 1
V_{OUT_DEM} > V_INT2/PDO
-1.1
Peak detector leakage current
ASK Receive mode,
INT2/PDO pin
I_{L_PDO}
Reg. PKDET = 1
-2
V_{OUT_DEM} =< V_INT2/PDO
mA
2
μA
OA input offset voltage
V_OS
Receive mode
-25
25
mV
Voltage threshold for high to low
Receive mode,
LNA gain transition
GAIN_LNA pin
V_{GAIN_HL Reg. LNACTRL = 0,}
1.0
1.3
1.6
V
Reg. LNAHYST = 1
Voltage threshold for low to high
Receive mode,
LNA gain transition
V_{GAIN_LH} Reg. LNACTRL = 0,
1.3
1.6
1.9
V
GAIN_LNA pin
Reg. LNAHYST = 1
RSSI characteristics
RSSI voltage at low IFA
input level
RSSI voltage at high IFA
input level
V_{L_RSSI}
V_{H_RSSI}
Receive mode,
V_{IN_IFA} = 100μV
(CW, 10.7MHz)
Receive mode,
V_{IN_IFA} = 100mV
(CW, 10.7MHz)
0.95
V
1.95
V
39010 07122
Rev. 008
Page 28 of 44
Data Sheet
June/07