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STA8089GTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P31
Electrical characteristics STA8089G
22/31 DocID030710 Rev 1
Table 16 lists the DC characteristics for the 1.0 V IO digital buffers input buffers: STBYn
(24), STDBY_OUT (23), WAKEUP (26), TRSTn (3) and RSTn (25).
4.8 AC characteristics
4.8.1 RF electrical specifications
V
OL
Low level output voltage
V
DDIO
= 1.8 V — 0.4 V
V
DDIO
= 3.3V — 0.4 V
V
OH
High level output voltage
V
DDIO
= 1.8 V V
DDIO
- 0.4 — V
V
DDIO
= 3.3V V
DDIO
- 0.4 — V
1. Excludes oscillator inputs RTC_XTI and XTAL_IN. Refer to oscillator electrical specifications.
2. Apply to all digital inputs unless specified otherwise.
Table 16. 1.0 V I/O buffers DC characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
IL
Logical input low level voltage V
OB
= 1.0 V -0.3 — 0.35 * V
OB
V
V
IH
Logical input high level voltage V
OB
= 1.0 V 0.65 * V
OB
—V
OB
+ 0.3 V
V
OL
Low level output voltage V
OB
= 1.0 V — 0.2 V
V
OH
High level output voltage V
OB
= 1.0 V V
OB
- 0.2 — V
Table 15. I/O buffers DC characteristics (continued)
Symbol Parameter
Test
conditions
Min. Typ. Max. Unit
Table 17. RFCHAIN – GALGPS filter and VGA
Symbol Parameter Test conditions Min Typ Max Unit
S11
(1)
Input return loss GPS band — -8 dB
f
IF
IF frequency
PLL in default condition with
26Mhz as reference
— 4.045 MHz
NF Noise figure
NF overall chain with AGC set
at 0 dB
—2
(1)
dB
C
G
Conversion gain from
RF input to ADC input
VGA at max gain — 119 dB
VGA at min gain — 69 dB
IP
1dB
RF-IF-VGA input
compression point
VGA min — -80 dBm
IRR Image rejection ratio — 20 dB
BW
GPS
-3dB IF bandwidth
GPS mode — 2.4 MHz
BW
GAL
Galileo mode — 4.8 MHz
DocID030710 Rev 1 23/31
STA8089G Electrical characteristics
30
ATT
Alias frequency
rejection
F = 60 MHz
(fs = 65.474 MHz)
—30 dB
T
gGPS
IF filter group delay
variation
GPS mode — 200
(1)
ns
T
gGAL
Galileo mode — 30
(1)
ns
1. Not tested in production.
Table 18. RFCHAIN – GLONASS/BeiDou filter and VGA
Symbol Parameter Test conditions Min Typ Max Unit
S11
(1)
1. Not tested in production.
Input return loss
GLONASS band -10
dB
BeiDou band -7
f
IFGNS/BDU
IF frequency for
GLONASS
PLL in default condition
with 26 Mhz as
reference
— 8.519
MHz
IF frequency for BeiDou — 10.277
NF Noise figure
NF overall chain with
AGC set at 0 dB
—2
(1)
dB
C
G
Conversion gain from
RF input to ADC input
VGA at max gain — 118 dB
VGA at min gain — 68 dB
IP
1dB
RF-IF-VGA input
compression point
VGA min — -80 dBm
IRR Image rejection ratio — 25 dB
BW
GNS/BDU
-3dB IF bandwidth — 10 MHz
ATT Alias frequency rejection
F = 53 MHz
(fs = 65.474 MHz)
—30 dB
T
gGNS/BDU
IF filter group delay
variation
—20
(1)
ns
Table 19. Synthesizer
Symbol Parameter Min. Typ. Max. Unit
F
TCXO_XTAL
Input frequency for xtal amplifier
(1)
1. That amplifier can be used also like TCXO input buffer
10 52 MHz
R
DIV
Reference divider range 1 63
N
DIV
Loop divider range 56 2047
F
LO
LO operating frequency 3142.656 MHz
Table 17. RFCHAIN – GALGPS filter and VGA (continued)
Symbol Parameter Test conditions Min Typ Max Unit
Electrical characteristics STA8089G
24/31 DocID030710 Rev 1
4.8.2 Oscillator electrical specifications
This device contains two oscillators:
a 32.768 kHz oscillator/buffer for RTC circuit.
an OSCI oscillator/buffer in the RF Front-End
When used in oscillator mode, each oscillator requires a specific crystal, with parameters
that must be as close as possible to the following recommended values. When used in input
buffer mode, an external clock source must be applied.
32.768 kHz OSCI32 oscillator specifications
The 32.768 kHz OSCI32 oscillator is connected between RTC_XTI (oscillator amplifier
input) and RTC_XTO (oscillator amplifier output). It also requires two external capacitors of
18 pF
(a)
, as shown on Figure 3.
OSCI32 is disabled by default and must be enabled by setting bit28-OSCI_EN of
PRCC_BACKUP_REG0 to have 32.768KHz oscillation when an XTAL pi-network is
connected to RTC_XTI/RTC_XTO pins.
The recommended oscillator specifications are shown in Table 20:
The oscillator amplifier specifications are shown in following table:
a. Using crystal with recommended characteristics as per Table 20.
Table 20. Crystal recommended specifications
Symbol Parameter Min. Typ. Max. Unit
F
SXTAL
Crystal frequency
(1)
1. Not tested in production.
— 32.768 — kHz
LM
SXTAL
Motion inductance
(1)
—5—kH
CM
SXTAL
Motional capacitance
(1)
— 5.0 — fF
CO
SXTAL
Shunt capacitance
(1)
— 1.3 — pF
ESR Resonance resistance
(1)
— — 80 kΩ
CL External load capacitance
(1)
—18—pF
Table 21. Oscillator amplifier specifications
Symbol Parameter Min. Typ. Max. Unit
T
S
Startup time
(1)
1. Not tested in production.
— 0.3 0.6 s
DL Drive level
(1)
— — <0.1 μW
RLC Required load capacitance
(1)
— 12.5 — pF
GM Startup transconductance 22.5 33.6 — μA/V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P31

STA8089GTR

Mfr. #:
Buy STA8089GTR
Manufacturer:
STMicroelectronics
Description:
RF Receiver GPS/Galileo/Glonass/Beidou/QZSS receiver
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New from this manufacturer.
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