T4258-ILQ [ATMEL]
AM/FM Receiver IC; AM / FM接收器IC
| 型号： | T4258-ILQ |
| 厂家： | 
ATMEL |
| 描述： | AM/FM Receiver IC |
| 文件： | 总17页 (文件大小：145K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
T4258
AM/FM Receiver IC
Description
The T4258 is an integrated AM/FM frontend circuit in can be built together with the PLL U4256BM. This ICs
BICMOS technology. It contains a double conversion are designed for high performance car radio applications.
system for FM and an up-/down conversion circuit for
AM (IF1 = 10.7 MHz, IF2 = 450 kHz). A complete
automatically aligned high performance AM/FM tuner
Electrostatic sensitive device.
Observe precautions for handling.
FD eRaetcueirveinsg condition analyzer
D Soft mute and multipath noise cancellation
D AM up-/down conversion system
D AM stereo capability
D Integrated band filter for 2nd IF;
with software controlled bandwidth
D Pin compatible with U4255BM
D FM-double conversion system
D Stop signal generation for AM and FM
D Automatic alignment possible
D 3-wire bus controlled
D World tuner, US Weatherband, J-band
D Completely integrated FM demodulator
Block Diagram
V3
IF1OUT MX2IN
IF1FMI
38
IF1AMI
33
MX2OB
IF1REF
39
MX1OA MX1OB
MX2OA IF2IN V3P
44
43
29
24
28
27
30
26
23
AM
AM
Dem.
OPLPF
32
FM
41
IFAGCL
IFAGCH
AGC
MX1AMA
MX1AMB
36
35
AM
3
7
V3
AMAGC
AMVREG
AMPLPF
AGC
IF2OUT
FILADJ
6
8
Noise–
blanker
20
37
Automatic
Adjustment
AGC
MX1FMA
MX1FMB
GNDMX
1
FM
Multi–
path
MULTIP
MPX
2
4
40
Divider
2...10
OSCOUT
Offset
FM
Dem.
Soft
Mute
16
Adj.
Chan.
Stop
11
Divider
OSC
GNDOSC
OSCE
15
14
13
V3
Bandgap
Dev.
Ana.
Bus
INT
21
INT
OSCB
22
10
34
31
DEV
19
DATA METER
12 25 42
5
17 18
EN
9
V57
VS
MX2LO ADJAC
SMUTE
GND
FMAGC
CLK
Figure 1. Block diagram
Ordering Information
Extended Type Number
Package
Remarks
T4258-ILQ
SSO44
SSO44
Taped and reeled
Tube
T4258-ILS
Rev. A1, 10-Jan-01
1 (17)
T4258
Pin Description
Pin
Symbol
Function
1
2
MX1OB
43 MX1OA
44
MX1FMA
MX1FMB
MX1AMB
GNDMX
FMAGC
1
MX1FMA 1st mixer FM input A
MX1FMB 1st mixer FM input B
MX1AMB 1st mixer AM input B
GNDMX Ground 1st mixer
2
3
4
3
VS
42
41
40
39
38
37
5
FMAGC
FM preamplifier AGC
6
AMVREG AM control voltage
AMAGC AM preamplifier AGC
AMPLPF AM AGC LP filter
4
MX1AMA
MULTIP
IF1REF
IF1FMI
FILADJ
IFAGCL
IFAGCH
SMUTE
IF1AMI
OPLPF
DEV
7
8
5
9
METER
ADJAC
MPX
Fieldstrength output
Adjacent channel detection output
Multiplex signal
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
6
AMVREG
AMAGC
V57
5.7 V reference voltage
Oscillator basis
7
OSCB
OSCE
Oscillator emitter
8
AMPLPF
METER
ADJAC
MPX
GNDOSC Oscillator ground
OSCOUT Oscillator output
9
36
35
34
33
32
31
30
29
EN
3-wire bus enable
CLK
3-wire bus clock
10
11
12
13
14
DATA
IF2OUT
INT
3-wire bus data
2nd IF amplifier output
Interrupt, stop signal, test out
10.25 MHz input for 2nd mixer
2nd mixer output B
MX2LO
MX2OB
MX2OA
GND
V57
2nd mixer output A
OSCB
OSCE
Ground
MX2IN
V3P
2nd mixer input
3 V ref. for AMPIN, AMIFAGC, Control, IF2IN
2nd IF amplifier input
3 V reference for IF1OUT, MX2IN
1st IF amplifier output
Deviation detect output
Operating point LPF
IF2IN
IF1OUT
V3
GNDOSC 15
V3
IF1OUT
DEV
16
OSCOUT
EN
28 IF2IN
OPLPF
IF1AMI
SMUTE
17
18
19
20
1st IF AM amplifier input
Soft MUTE control input
27
26
25
V3P
CLK
IFAGCH IF AGC LP filter high time constant constant
MX2IN
GND
DATA
IF2OUT
IFAGCL
FILADJ
IF1FMI
IF1REF
IF AGC LP filter low time constant
Filter adjust
1st IF FM amplifier input
1st IF & MX1OUT ref., MX1AMA, MX1AMB
INT 21
22
24 MX2OA
MULTIP Multipath detection output
41 MX1AMA 1st mixer AM input A
23
MX2OB
MX2LO
42
43
44
VS
Supply voltage
MX1OA
MX1OB
1st mixer output A
1st mixer output B
Figure 2. Pinning SSO44
2 (17)
Rev. A1, 10-Jan-01
T4258
Absolute Maximum Ratings
All voltages are referred to GND (Pin 25)
Parameter
Symbol
Value
10
Unit
V
Supply voltage
Pin 42
V
S
Power dissipation
P
tot
1,0
W
Junction temperature
T
150
°C
°C
°C
j
Ambient temperature range
Storage temperature range
T
amb
–40 to +85
–50 to +150
T
stg
Operating Range
All voltages are referred to GND (Pin 25)
Parameter
Symbol
Min.
8
Typ.
Max.
Unit
V
Supply voltage range
Pin 42
V
S
8.5
10
85
Ambient temperature
T
amb
–40
°C
Thermal Resistance
Parameter
Symbol
Value
Unit
K/W
Junction ambient
soldered to PCB
R
t.b.d.
thJA
Electrical Characteristics
Test conditions (unless otherwise specified): V = +8.5 V, T
= +25°C
S
amb
for AC parameters: fi = 1 MHz, Rg = 50 W, f
= 0.4 kHz, m = 0.3, f = 450 kHz, reference point Pin 4
RF
MOD
IF
Parameter
Supply voltage
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
10
Unit
V
Pin 42
Pin 42
V
S
8.5
Supply current
I
100
mA
S
AM RF AGC
AGC threshold Mixer Input
(2 bit)
91
94
97
dbµV
dbµV
dbµV
dbµV
100
AM LO divider
Programmable divider
AM Mixer (10.7 MHz)
DC supply current
(3 bit)
N
2
10
Pin 43 + 44
Pins 43, 44
Pin 41
17
mA
Conversion conductance
io /vi
if rf
S
m1
4.1
mA/V
Maximum IF output
Vo
8
V
pp
IF
Input intercept point 3rd
order
IP3
133
dBµV
Input resistance
10 MHz
13
kW
Rev. A1, 10-Jan-01
3 (17)
T4258
Electrical Characteristics (continued)
Test conditions (unless otherwise specified): V = +8.5 V, T
= +25°C
S
amb
for AC parameters: fi = 1 MHz, Rg = 50 W, f
= 0.4 kHz, m = 0.3, f = 450 kHz, reference point Pin 4
RF
MOD
IF
Parameter
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
AM-1st IF Amplifier (10.7 MHz)
Input resistance
Pin 33
Ri
G
100
15
kW
dB
IF preamplifier gain
R = 330 W
L
Pins 33 to 30
Preamplifier control range
26
dB
Output intercept point 3rd
order
IP3
F
137
dBµV
Noise figure
10
dB
Mixer 2 (450 kHz)
DC supply current
Conversion conductance
Pin 23 + 24
Pins 23, 24
10
2
mA
S
mA/V
m2
io /vi
if2 if1
Maximum IF output
Output impedance
Vo
8
V
pp
IF
Pin 23 – GND
Pin 24 – GND
R
C
1
3
MW
pF
o
o
Input intercept point 3rd
order
IP3
133
dBµV
Input resistance
R
330
W
i
2nd IF Amplifier (450 kHz)
Input resistance
Pin 28
R
3
kW
dB
dB
i
IF preamplifier gain
Preamplifier control range
IF2 Output (Pin 20)
Output level
Pin 28 to 20
G
53
47
200
mV
Oscillator
Oscillator amplitude
R (Pin 13) = 220 W,
V
V
160
100
90
mV
mV
mV
g
LOB
LOE
Q of L = 70
osc
V
LObuf
70
70
220
260
–15
Frequency range
Harmonics
f
MHz
dBc
W
OSC
Pin 16
Pin 16
Output resistance
R
70
LObuf
Programmable oscillator
divider
Range
Nosc
1
3
FM Europe
FM Japan
AM
2
3
2
WB
1.5
4 (17)
Rev. A1, 10-Jan-01
T4258
Electrical Characteristics
Test conditions (unless otherwise specified): V = +8.5 V, T
= +25°C, for AC parameters: fi = 100 MHz,
RF
S
amb
Rg = 50 W, f
= 0.4 kHz, Df = ±75 kHz, f = 450 kHz, reference point Pin 4
MOD
IF
Parameter
FM AGC
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
AGC threshold mixer input
(2 bit)
Vmixin
85
90
95
dBµV
dBµV
dBµV
dBµV
103
AGC threshold mixer output
Vmix-
out
t.b.d.
t.b.d.
dBµV
AGC threshold IF amp. out
FM Mixer
Vif1out
dBµV
Conversion transconductance
3rd order intercept point
g
7
mA/V
c
Load impedance:
= 200 Ω
IP3
125
dBµV
R
L43, 44
Noise figure
NF
10
dB
dsb
Input resistance
Pin 1 to 2
Pin 1 to 2
Pin 1
R
C
kΩ
pF
i 1, 2
i 1, 2
Input capacitance
5
9
Input 1 resistance to ground
f = 100 MHz
f = 100 MHz
R
kΩ
pF
i1
i1
Input 1 capacitance to
ground
Pin 1
C
Input 2 resistance to ground
f = 100 MHz
f = 100 MHz
Pin 2
Pin 2
R
C
kΩ
i2
i2
Input 2 capacitance to
ground
7
5
pF
Output capacitance to GND
Pins 43, 44
C
pF
o 43,
C
o 44
1st IF FM Amplifier
Digitally adjustable gain
3 bit, 10.7 MHz
G
20
30
dB
dB
min
G
max
Input resistance
Pin 38
Pin 30
R
330
330
Ω
Ω
i 38
Output resistance
R
o 30
Temperature coefficient of
the gain
Bit 66 = 0
Bit 66 = 1
TK1
dB/K
Temperature coefficient of
the gain
TK2
dB/K
Noise figure
F
t.b.d.
130
dB
Output intercept point 3rd
order
IP3
dBµV
Rev. A1, 10-Jan-01
5 (17)
T4258
Electrical Characteristics (continued)
Test conditions (unless otherwise specified): V = +8.5 V, T
= +25°C, for AC parameters: fi = 100 MHz,
RF
S
amb
Rg = 50 W, f
= 0.4 kHz, Df = ±75 kHz, f = 450 kHz, reference point Pin 4
MOD
IF
Parameter
FM Demodulator (Pin 11)
Output voltage
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
V
= 40 mV
V
MPX
,
150
mV
iPin 23, 24
f = 450 kHz
Pin 11
Deviation = ± 22.5kHz,
f
= 1 kHz
MOD
Signal-to-noise related to
22.5 kHz dev.
Bandwidth = 30 Hz .. 20 kHz
Deemphasis 50 µs
S/N
60
dB
%
Total distortion
Bandwidth 2nd IF filter =
120 kHz
0.3
WB Demodulator (Pin 11)
Output voltage
Bit 71 = 0, Bit 72 = 1
V
Pin 11
,
165
3.5
mV
%
MPX
V
= 40 mV
iPin 23, 24
f = 450 kHz
Deviation = ± 2.5 kHz,
f
= 1 kHz
MOD
Total distortion
Bandwidth 2nd IF filter =
30 kHz
Fieldstrength Output (Pin 10) (Bit 80 = 0)
Range
85
5
dB
V
Max. output voltage
Steepness
50
mV/dB
Integrated IF filter
Bandwidth
FM (4 bit)
WB (4 bit)
50
20
200
100
kHz
kHz
Centerfrequency adjust
MPX Lowpass
Bandwidth
–43
+43
kHz
Bit 79 = 0
Bit 79 = 1
90
180
kHz
kHz
Stopsignal Generator
Stop Window
± 0.5
± 80
kHz
6 (17)
Rev. A1, 10-Jan-01
T4258
Electrical Characteristics (continued)
Parameter
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
3–wire bus, ENABLE, Clock, DATA
Pins 17, 18, 19
Input voltage
High
LOW
V
BUS
V
BUS
2.0
V
V
1.0
1.0
Clock frequency
MHz
Period of CLK
High
Low
t
t
250
250
ns
ns
H
L
Rise time EN, DA, CLK
Fall time EN, DA, CLK
Set-up time
t
400
100
ns
ns
ns
ns
ns
R
t
t
F
S
100
250
0
Hold time EN
t
HEN
HDA
Hold time DA
t
Bus Timing
t
R
t
F
Enable
Data
t
t
HEN
S
t
F
t
R
tHDA
t
S
t
R
t
F
Clock
t
H
t
L
96 11826
Figure 3. Bus timing
Rev. A1, 10-Jan-01
7 (17)
T4258
Data Transfer
A24_100
MSB
BYTE3
LSB MSB
BYTE2
LSB MSB
BYTE1
LSB
ADDR. Demodulator
Gain FM –
IF1
Pin21 Search stop window/
Local OSC AM divider/ Multipath
sensitivity
Pin9
Meter
Pin11
MPX
LPF
Stop signal gate time
INT
Noiseblanker AM
sensitivity
1
0
0
1=
1=
1=
1=
0=
AM
FM
stop
nband 90kHz
B93
B92 B91 B90 B89
B88
B87
B86 B85 B84
B83
B82
B81
B80
B79
B78 B77 B76
B75
B74
B73
A24_101
MSB
BYTE3
LSB MSB
LSB MSB
BYTE1
LSB
BYTE
2
ADDR. WB demodu-
lator gain
Soft mute
threshold
Soft
mute
depth IF1
TK
FM
AGC
threshold
AM/FM
1st IF
ampl.
AM/FM +AGC
1st
Mixer
Pin23/
Pin24
MX2O
Int. IF2 reference shift
Pin 20
Pin28
Demo-
Gain
local
OSC
IFOUT IF2IN dulator
control
ampl.
AM/FM band-
width
1
0
1
1=
26dB
1=AM
B65 B64 B63
1=AM
0=
IF2out
0=
open
0=
active
0=
low
B72
B71 B70 B69 B68
B67
B66
B62
B61
B60
B59
B58
B57 B56 B55
B54
B53
B52
A24_111
MSB
LSB MSB
LSB MSB
LSB
BYTE
3
BYTE
2
BYTE
1
ADDR. Local
OSC
Do not
change
Pin 9 offset
Bandpath filter center
frequency
Pin 9
Meter
Local OSC AGC
prescaler (VCO(Buffer)
AGC
1
1
1
0
0
0
0
0
0
0
0
0
1=
+multi
B30
B29 B28 B27 B26
B25
B24
B23 B22 B21
B20
B19
B18
B17
B16
B15 B14 B13
B12
B11
B10
A8_100
MSB
BYTE 1
LSB
ADDR.
Test–
mode
Multipath
noise
cancellation
Pin 11
MPX
OUT
Pin 40/10
Reset
Noise
blanker
AM
1
0
0
0
0=on
B8
1=Mute
B7
0
1=on
B5
B9
B6
A8_101
MSB
BYTE 1
Bandpath filter Band width
LSB
ADDR.
Pin 21 INT
1
0
1
1= ON
B4
B3
B2
B1
B0
8 (17)
Rev. A1, 10-Jan-01
T4258
Pulse Diagram
8-bit command
EN
DATA
CLK
LSB
BYTE 1
MSB
16-bit command
EN
DATA
CLK
LSB
BYTE 1
MSB LSB
BYTE 2
MSB
24-bit command
EN
DATA
CLK
LSB
MSB
LSB
BYTE 1
BYTE 2
MSB LSB
BYTE 3
MSB
Figure 4. Pulse diagram
Bus Control
The operating mode is set by the bits 92 and 93
Bit 88 switches the search mode on/off
Station search
Receive
Bit 88
AM/ FM/ Weather Channel
Bit 93
Bit 92
0
1
Standby
FM
0
0
1
1
0
1
0
1
Search
AM
Weather band
Bits 85 to 87 select the the search-stop deviation from the
center frequency ans AM noiseblanker sensitivity
The bits 89 to 91 control the gain of the FM IF amplifier
AM Noise-
blanker
Sensitivity window +
Search-
stop
Bit 87 Bit 86 Bit 85
Gain FM-IF
19 dB
Bit 91 Bit 90 Bit 89
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Low
0.5 kHz
1.1 kHz
2.3 kHz
4.8 kHz
10 kHz
20 kHz
40 kHz
80 kHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
21 dB
23 dB
25 dB
Normal
27 dB
28 dB
29 dB
30 dB
High
Rev. A1, 10-Jan-01
9 (17)
T4258
In AM mode (Bits 92, 93), Bits 81 to 84 set the divide Bit 80 and Bit 13 switches between narrow band field
factor of the AM divider
strength information and wide band field strength
information
Divider
AM Mixer 1
Bit Bit Bit Bit Bit Bit
Field strength
narrow band / wide band
Bit
80
Bit
13
93
1
1
1
1
1
1
1
1
1
92
0
0
0
0
0
0
0
0
0
84
1
0
0
0
0
0
0
0
0
83
X
1
82
X
1
81
X
1
Divide by 10
Divide by 9
Divide by 8
Divide by 7
Divide by 6
Divide by 5
Divide by 4
Divide by 3
Divide by 2
FM field strength (wide band)
0
0
1
1
0
1
Wide Band + Multipath fieldstrength
1
1
0
AM field strength from AGC
(narrow band)
1
0
1
1
0
0
Narrow band + Multipath fieldstrength
1
0
0
1
1
0
1
0
0
0
1
Bit 79 controls the band width of the low pass filter of the
MPX output
0
0
0
Band Width MPX Low Pass Filter
Bit 79
90 kHz
0
1
180 kHz
In FM mode and in weather band mode (Bit 92, 93), the
Bits 81 to 84 set the multipath sensitivity
Sensitivity
Multipath
Bit Bit Bit Bit Bit Bit
The stop counter calculates an average center frequency
during the time which is set by the bits 73 to 78
93
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
92
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
84
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
83
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
82
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
81
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Off
Time Window
Bit Bit Bit Bit Bit Bit
Low
for Stop Signal 78 77 76 75 74 73
3.1969 ms
1 x 3.1969 ms
...
0
0
0
0
0
0
0
0
0
0
0
1
63 x 3.1969 ms
1
1
1
1
1
1
Normal
The demodulator gain for the weather band mode is set by
the bits 71 and 72
Demodulator Gain in
Weather Band Mode
Bit 72
Bit 71
5 x
7.5 x
10 x
15 x
0
0
1
1
0
1
0
1
High
10 (17)
Rev. A1, 10-Jan-01
T4258
For soft mute, the MPX signal level will be reduced Bits 60 and 61 controls the band width of the 2nd-mixer
depending on the input signal strength. Bits 68 to 70 set output tank, in FM mode
the input signal field strength, at which the MPX signal
will be reduced by 3 dB (for soft mute). The setting of
fieldstrength offsett (Bit 18 ... 21) has also influence of the
soft start.
FM Band Width Mixer 2
150 kHz
Bit 61
Bit 60
0
0
1
1
0
1
0
1
200 kHz
Start Soft Mute
0 dB
Bit 70
Bit 69
Bit 68
250 kHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
450 kHz
1 dB
2 dB
Bit 62 select which 1st mixer and AGC stage in active
3 dB
4 dB
Bit 62
5 dB
FM mixer + FM AGC active
AM mixer + AM AGC active
0
1
6 dB
7 dB
Bit 63 controls which 1st IF amplifier is active
Bit 67 sets the maximum reduction of the MPX signal
level
Bit 63
Max. Value of Soft Mute
Bit 67
1st FM – IF amplifier active
1st AM – IF amplifier active
0
1
30 dB
26 dB
0
1
Setting of the internal second IF reference shift
Bit 59 Bit 58 Bit 57 Bit 56
Temperature coefficient setting of FM IF–amplifier
Temperature Coefficient (TC)
of the IF Amplifier
Bit 66
IF Offset
+ 0.00 kHz
+ 6.25 kHz
+ 12.50 kHz
+ 18.75 kHz
+ 25.00 kHz
+ 31.25 kHz
+ 37.50 kHz
+ 43.75 kHz
– 0.00 kHz
– 6.25 kHz
– 12.50 kHz
– 18.75 kHz
– 25.00 kHz
– 31.25 kHz
– 37.50 kHz
– 43.75 kHz
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
TK 1
TK 2
0
1
Level control of the FM / WB – AGC threshold
FM AGC Threshold
103 dBµV
Bit 65 Bit 64 Bit 62
0
0
1
1
0
1
0
1
0
0
0
0
97 dBµV
92 dBµV
85 dBµV
Level control of AM-AGC threshold
AM Control Start
91dBµV
Bit 65
Bit 64
Bit 62
0
0
1
1
0
1
0
1
1
1
1
1
94 dBµV
97 dBµV
100 dBµV
Rev. A1, 10-Jan-01
11 (17)
T4258
Function of Pin 20 setting is done by Bit 55
Setting of the fieldstrenght offset (Output Pin 9)
Offset Field- Bit 21 Bit 20
strenght
Bit 19 Bit 18
Pin 20: IF out / Field Strength
for Multipath
Bit 55
0.0 dB
0.5 dB
1.0 dB
1.5 dB
2.0 dB
2.5 dB
3.0 dB
3.5 dB
4.0 dB
4.5 dB
5.0 dB
5.5 dB
6.0 dB
6.5 dB
7.0 dB
7.5 dB
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2nd IF output
0
1
Multipath field strength
Band filter, in FM mode
2nd IF Filter
Internal filter
Bit 54
0
1
External + internal filter
Setting Bit 53 controls the demodulator in FM/ WB mode.
Demodulator Control
FM fine tuning OFF (default)
WB fine tuning
Bit 53
1
0
Setting Bit 52 controls the gain of the local oscillator.
Local Oscillator
Low gain
Bit 52
0
1
Setting Bit 17 controls the center frequency OFFSET of
the integrated bandpath filter’s center frequency.
High gain
Offset Center Frequency
Offset +
Bit 17
Bit 30 controls the oscillator AGC
0
1
Offset –
Oscillator AGC
AGC of (default)
AGC on
Bit 30
0
1
Setting the OFFSET of the integrated bandpath filter
center frequency.
Offset Center
Frequency
Bit 17 Bit 16 Bit 15 Bit 14
0.00 kHz
6.25 kHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
12.50 kHz
18.75 kHz
25.00 kHz
31.25 kHz
37.50 kHz
43.75 kHz
12 (17)
Rev. A1, 10-Jan-01
T4258
Setting the local oscillator prescaler (VCO/ Buffer)
Bit 6 = 1 resets the Multipath sensor and the adjacent
channel sensor
Prescaler Prescaler Bit 12
Bit 11
Bit 10
Sensor out (Pin 10, 40)
Normal
Bit 6
VCO
Buffer
0
1
1
1
3
X
0
0
0
0
1
1
0
1
1
0
1
To ground
1.5
1.5
2
1.5
2
1
Bit 5 switches the AM noiseblanker ON/OFF
X
X
AM Noiseblanker
Bit 5
3
3
OFF
ON
0
1
Setting Bit 9 (expert mode) activates test mode (B18 –
B23 active)
Bits 0 to 3 set the band width of the integrated 2nd IF band
filter
Mode
Bit 9
IF Bandwidth
200 kHz
190 kHz
180 kHz
170 kHz
160 kHz
150 kHz
140 kHz
130 kHz
120 kHz
110 kHz
100 kHz
90 kHz
Bit 3 Bit 2 Bit 1 Bit 0
Normal mode
Test mode
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Bit 8 = 0 activates the multipath noise canceller
Multipath Noise
Canceller
Bit 8
Active
0
1
Not active
Bit 7 = 1 mutes the MPX output
Mute of MPX Output
MPX out, Pin 11
Mute MPX
Bit 7
80 kHz
0
1
70 kHz
60 kHz
50 kHz
Rev. A1, 10-Jan-01
13 (17)
T4258
Test Circuit
Figure 5. Test circuit
14 (17)
Rev. A1, 10-Jan-01
T4258
Application Board Schematic
Figure 6. Application board schematic
Rev. A1, 10-Jan-01
15 (17)
T4258
Package Dimensions
9.15
8.65
Package SSO44
Dimensions in mm
18.05
17.80
7.50
7.30
2.35
0.3
0.8
0.25
0.10
0.25
10.50
10.20
16.8
44
23
technical drawings
according to DIN
specifications
1
22
16 (17)
Rev. A1, 10-Jan-01
T4258
Ozone Depleting Substances Policy Statement
It is the policy of Atmel Germany GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid
their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these
substances.
Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed
in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances
and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended
or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims,
costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death
associated with such unintended or unauthorized use.
Data sheets can also be retrieved from the Internet:
http://www.atmel–wm.com
Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423
Rev. A1, 10-Jan-01
17 (17)
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