TDA7407 Datasheet, PDF (9/30 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7407
NOISE BLANKER PART
internal 2nd order 140kHz high pass filter
programmable trigger threshold
trigger threshold dependent on high frequency
noise with programmable gain
additional circuits for deviation and field-
strength dependent trigger adjustment
very low offset current during hold time due to
opamps wMOS inputs
four selectable pulse suppression times
programmable noise rectifier charge/discharge
current
ELECTRICAL CHARACTERISTICS (continued)
Symbol
VTR
VTRNOISE
VRECT
VRECT DEV
VRECT FS
TS
VRECTADJ
SRPEAK
Parameter
Trigger Threshold ^{0) 1)}
Noise Controlled Trigger
Threshold ²⁾
Rectifier Voltage
deviation dependent
rectifier Voltage ³⁾
Fieldstrength Controlled
Rectifier Voltage ⁴⁾
Suppression Pulse
Duration ⁵⁾
Noise Rectifier
discharge adjustment ⁶⁾
Noise Rectifier Charge
Test Condition
meas. with VPEAK = 0.9V NBT = 111
NBT = 110
NBT = 101
NBT = 100
NBT = 011
NBT = 010
NBT = 001
NBT = 000
meas. with VPEAK = 1.5V NCT = 00
NCT = 01
NCT = 10
VMPX = 0mV
NCT = 11
NRD ⁶⁾ = 00
VMPX = 50mV; f = 150KHz
VMPX = 200mV; f = 150KHz
means. with
VMPX = 800mV
(75KHz dev.)
OVD = 11
OVD = 10
OVD = 01
OVD = 00
means. with
VMPX = 0mV
VLEVEL << VSBL
(fully mono)
FSC = 11
FSC = 10
FSC = 01
FSC = 00
Signal HOLDN
in Testmode
BLT = 00
BLT = 10
BLT = 01
Signal PEAK in
Testmode
Signal PEAK in
Testmode
BLT = 00
NRD = 00 ⁶⁾
NRD = 01 ⁶⁾
NRD = 10 ⁶⁾
NRD = 11 ⁶⁾
PCH = 0 ⁷⁾
PCH = 1 ⁷⁾
Min.
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
0.5
1.5
2.2
0.5
0.9
1.7
2.5
0.5
0.9
1.7
2.1
TBD
TBD
TBD
TBD
(c)
(c)
(c)
(c)
(c)
(c)
(c) = by design/characterization functionally guaranteed through dedicated test mode structure
Typ.
30
35
40
45
50
55
60
65
260
220
180
140
0.9
1.7
2.5
0.9(off)
1.2
2.0
2.8
0.9(off)
1.4
1.9
2.4
38
32
25.5
22
0.3
0.8
1.3
2.0
10
20
Max.
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
(c)
1.3
2.1
2.9
1.3
1.5
2.3
3.1
1.3
1.5
2.3
3.1
TBD
TBD
TBD
TBD
(c)
(c)
(c)
(c)
(c)
(c)
Unit
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
mVOP
V
V
V
VOP
VOP
VOP
VOP
V
V
V
V
µs
µs
µs
µs
V/ms
V/ms
V/ms
V/ms
mV/µs
mV/µs
9/30