TH7111
868/915MHz
FSK/FM/ASK Receiver
DC Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at Ta = 23 °C and Vcc = 3 V
Parameter
Standby current
Total supply current at low gain
Symbol
ISBY
Icc, low
Condition
ENRX=0
ENRX=1,
LNA at LOW GAIN
ENRX=1,
Min
Typ
Max
Unit
100
9.0
nA
mA
6.0
7.5
7.5
9.2
Total supply current at high gain Icc, high
11.0
mA
LNA at HIGH GAIN
Opamp input offset voltage
Opamp input offset current
Opamp input bias current
RSSI voltage at low input level
Voffs
Ioffs
Ibias
VRSSI, low
LNA at LOW GAIN
VRSSI, high Pi = -35 dBm,
LNA at LOW GAIN
-20
-50
-100
0.5
20
50
100
1.5
mV
nA
nA
V
IOAP – IOAN
0.5 * (IOAP + IOAN
Pi = -65 dBm,
)
1.0
1.9
RSSI voltage at high input level
1.25
2.45
V
AC System Characteristics
all parameters under normal operating conditions, unless otherwise stated;
all parameters based on test circuits for FSK (Fig. 2), FM (Fig. 4) and ASK (Fig. 5), respectively;
typical values at Ta = 23 °C and Vcc = 3 V, RF at 868.3MHz, second IF at 10.7 MHz
Parameter
Symbol
Tfast
Condition
Min
Typ
Max
Unit
Start-up time – fast mode
FSK/FM
ENRX from 0 to 1,
ENRO = 1,
0.4
ms
valid data at output
ENRX from 0 to 1,
ENRO = 0,
valid data at output
depends on ASK de-
tector time constant
and start-up mode,
valid data at output
Start-up time – slow mode
FSK/FM
Tslow
0.9
ms
ms
Start-up time – ASK
TASK
R3•C13
+
Tfast
(or Tslow
)
Input sensitivity – FSK
(narrow band)
Pmin, n
BIF2 = 40kHz
-109
-102
dBm
dBm
∆f = ±15kHz (FSK/FM)
BER ≤ 3 10-3
Input sensitivity – FSK
(wide band)
Pmin, w
BIF2 = 150kHz
∆f = ±50kHz (FSK/FM)
BER ≤ 3 10-3
Input sensitivity – ASK
(narrow band)
Input sensitivity – ASK
(wide band)
PminA, n
PminA, w
BIF2 = 40kHz
-108
-104
0
dBm
dBm
dBm
dBm
BER ≤ 3 10-3
BIF2 = 150kHz
BER ≤ 3 10-3
BER ≤ 3 10-3
Maximum input signal – FSK/FM Pmax, FM
LNA at LOW GAIN
BER ≤ 3 10-3
Maximum input signal – ASK
Pmax, ASK
-10
LNA at LOW GAIN
Spurious emission
Image rejection
Blocking immunity
Pspur
-70
dBm
dB
dB
65
57
∆Pimag
∆Pblock
KVCO
ICP
∆fblock > ±2MHz, note 1
VCO gain
Charge pump current
250
60
MHz/V
µA
Notes: 1. desired signal with FSK/FM or ASK modulation, CW blocking signal
TH7111 Data Sheet
3901007111
Page 10 of 20
Nov. 2001
Rev. 005
ETC [ ETC ]
