PHILIPS TDA9901

INTEGRATED CIRCUITS
DATA SHEET
TDA9901
Wideband differential digital
controlled variable gain amplifier
Product specification
Supersedes data of 1998 Apr 15
File under Integrated Circuits, IC02
1999 Oct 08
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
FEATURES
GENERAL DESCRIPTION
• 130 MHz, −3 dB small signal bandwidth
The TDA9901 is a wideband, low noise amplifier with
differential inputs and outputs. The TDA9901 incorporates
an AGC function with digital control. The TDA9901 is
optimized for fast switching between different gain
settings, preserving small phase and amplitude error.
• Digitally controlled gain
• TTL/CMOS compatible digital inputs (3.3 or 5 V)
• TTL single ended or differential clock input with PECL
compatibility
The TDA9901 presents an excellent combination of low
noise and good linearity for a wide input frequency range.
• 24 dB gain control range
• Five steps of 6 dB plus 6 dB fixed gain
The TDA9901 is optimized for processing IF signals in
GSM base stations. It is also suited for many other
applications as a general purpose digitally controlled
variable gain amplifier.
• 30 dB gain maximum
• High impedance differential inputs
• Low impedance differential outputs
• High power supply rejection
The TDA9901 is able to operate from 4.75 to 5.25 V
supply for the analog part and from 3.0 to 5.25 V for the
digital part.
• 125 nV/√Hz output voltage noise density at 30 dB gain
• Fast gain settling
• Dual control modes: transparent or latched.
APPLICATIONS
• Linear AGC systems
• IF amplifier in IF conversion systems (e.g. base stations
or satellite receivers)
• Instrumentation
• Multi-purpose amplifier
• Driver for differential ADCs (e.g. TDA8768).
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
VDDD
digital supply voltage
3.0
3.3
5.25
V
IDDA
analog supply current
−
30
36
mA
IDDD
digital supply current
−
3.0
5.0
mA
Gdif
differential gain
Ptot
total power dissipation
5.25
UNIT
analog supply voltage
−3 dB small signal bandwidth
5.0
MAX.
VDDA
B−3dB
4.75
TYP.
V
minimum gain
5.7
6.11
6.46
dB
maximum gain
29.3
30.5
31.5
dB
Vo(dif)(p-p) = 0.125 V;
Tamb = 25 °C
110
130
−
MHz
−
160
216
mW
ORDERING INFORMATION
TYPE
NUMBER
TDA9901TS
1999 Oct 08
PACKAGE
NAME
DESCRIPTION
VERSION
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
2
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
BLOCK DIAGRAM
VDDD TE
handbook, full pagewidth
18
GRAY2
GRAY1
19
20
2
GRAY0 CLK CLKN VSSD
1
3
17
4
DECODER
LATCHES
TDA9901
IN
INN
6
15
7
14
6 dB
0, 6, 12, 18 or 24 dB
CMVGA
5
REFERENCE
GENERATOR
11
REFERENCE
GENERATOR
8, 9, 10, 13
16
12
MGM962
VDDA
n.c.
Fig.1 Block diagram.
1999 Oct 08
3
OUT
OUTN
VSSA
CMADC
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
PINNING
SYMBOL
PIN
DESCRIPTION
GRAY0
1
digital control signal bit 0 input
(LSB)
TE
2
transparent enable input
CLK
3
clock input for gain control setting
CLKN
4
inverting clock input for gain
control setting (active low)
CMVGA
5
regulator output common mode
VGA input
IN
6
non-inverting analog input
INN
7
inverting analog input (active low)
n.c.
8
not connected
n.c.
9
not connected
n.c.
10
not connected
VDDA
11
analog supply voltage
INN 7
14 OUTN
VSSA
12
analog ground
n.c. 8
13 n.c.
n.c.
13
not connected
n.c. 9
12 VSSA
OUTN
14
inverting analog output (active low)
n.c. 10
OUT
15
non-inverting analog output
11 VDDA
CMADC
16
regulator output common mode
ADC input
VSSD
17
digital ground
VDDD
18
digital supply voltage
GRAY2
19
digital control signal bit 2 input
(MSB)
GRAY1
20
digital control signal bit 1 input
handbook, halfpage
GRAY0 1
20 GRAY1
TE 2
19 GRAY2
CLK 3
18 VDDD
CLKN 4
17 VSSD
16 CMADC
CMVGA 5
TDA9901TS
IN 6
15 OUT
MGM963
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TDA9901 provides a digitally controlled variable gain function for high-frequency applications.
The TDA9901 can be operated in two different modes, depending on the value at pin TE. When TE is at logic 1, the gain
can be instantly controlled when the clock signal is HIGH (transparent mode). The gain is fixed during the LOW period
of the clock. When TE is at logic 0 the gain of the TDA9901 is changed at the rising edge of the clock signal.
1999 Oct 08
4
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
VDDA
analog supply voltage
−0.3
+7.0
V
VDDD
digital supply voltage
−0.3
+7.0
V
∆VDD
supply voltage difference between VDDA and VDDD
−1.0
+4.0
V
VI
input voltage level
−0.3
+7.0
V
IO
output current
−
10
mA
Tstg
storage temperature
−55
+150
°C
Tamb
ambient temperature
−40
+85
°C
Tj
junction temperature
−
150
°C
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.
THERMAL CHARACTERISTICS
SYMBOL
Rth(j-a)
PARAMETER
CONDITIONS
thermal resistance from junction to ambient
in free air
VALUE
UNIT
120
K/W
CHARACTERISTICS
VDDA = V11 to V12 = 4.75 to 5.25 V; VDDD = V18 to V17 = 3.0 to 5.25 V; VSSA and VSSD shorted together;
Tamb = −40 to +85 °C; typical values measured at VDDA = 5.0 V; VDDD = 3.3 V and Tamb = 25 °C; unless otherwise
specified; note 1.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies
VDDA
analog supply voltage
4.75
5.0
5.25
V
VDDD
digital supply voltage
3.0
3.3
5.25
V
∆VDD
voltage difference
between VDDA and VDDD
−0.2
−
+2.5
V
IDDA
analog supply current
−
30
36
mA
IDDD
digital supply current
−
3.0
5.0
mA
Variable gain amplifier transfer characteristics
B−3dB
−3 dB small signal
bandwidth
Vo(dif)(p-p) = 0.125 V;
Tamb = 25 °C
110
130
−
MHz
td(g)
group delay time
up to fi = 20 MHz;
minimum gain;
Tamb = 25 °C
−
2.5
−
ns
∆td(g)
group delay difference
6 dB gain step;
Tamb = 25 °C
−
−
300
ps
1999 Oct 08
5
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
SYMBOL
PARAMETER
TDA9901
CONDITIONS
MIN.
tst
settling time
10 to 90% maximum −
output transition;
CL(max) = 5 pF on
each output;
Tamb = 25 °C
Gstep
gain step size
DC input
TYP.
MAX.
UNIT
−
3.6
ns
Tamb = 25 °C
5.88
6.09
6.28
dB
all temperatures
5.6
6.09
6.56
dB
Tamb = 25 °C
5.76
6.11
6.40
dB
all temperatures
5.7
6.11
6.46
dB
Tamb = 25 °C
29.9
30.5
30.9
dB
all temperatures
29.3
30.5
31.5
dB
gain stability as a function minimum gain
of temperature
maximum gain
−
−1.0
−
mdB/°C
−
−7.5
−
mdB/°C
|∆G/∆VDD|
gain stability as a function minimum gain
of power supply
−
15
25
mdB/V
∆Vi(offset)
input offset voltage
difference
6 dB gain step
−
0.8
−
mV
F
noise figure
Rs = 100 Ω;
fi = 20 MHz
minimum gain
−
29.1
−
dB
maximum gain
−
9.9
−
dB
G = 6 dB
−
75
−
nV/√Hz
G = 12 dB
−
82
−
nV/√Hz
G = 18 dB
−
97
−
nV/√Hz
G = 24 dB
−
91
−
nV/√Hz
G = 30 dB
−
124
−
nV/√Hz
0 to 20 MHz
−
57
−
dB
20 to 100 MHz
−
39
−
dB
G(min)
G(max)
∆G/∆T
Vn(o)(eq)
PSRR(VDDA)
PSRR(VDDD)
CMRR
1999 Oct 08
minimum gain setting
maximum gain setting
equivalent output noise
voltage spectral density
DC input
DC input
Rs = 100 Ω;
fi = 20 MHz;
Tamb = 25 °C
power supply ripple
rejection of VDDA
minimum gain
power supply ripple
rejection of VDDD
minimum gain
common mode rejection
ratio
dB
0 to 20 MHz
−
67
−
dB
20 to 100 MHz
−
51
−
dB
0 to 20 MHz
−
75
−
dB
20 to 150 MHz
−
45
−
dB
6
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
SYMBOL
PARAMETER
TDA9901
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Analog inputs
Vi(max)(p-p)
maximum input voltage
(peak-to-peak value)
minimum gain
−
1.0
−
V
maximum gain
−
60.4
−
mV
2.0
2.7
VDDA − 1.9
V
Vi(cm)
common mode input
voltage
Ii
input current
−
55
−
µA
Ri
input resistance
10
−
−
kΩ
Ci
input capacitance
−
−
5
pF
Vi(cm) = 2.7 V
Analog outputs; note 2
maximum differential
output voltage
(peak-to-peak value)
maximum gain
2.0
−
−
V
minimum gain
2.0
−
−
V
Vo(cm)
common mode output
voltage
referenced to VDDA;
Tamb = 25 °C
VDDA − 2.56 VDDA − 2.42 VDDA − 2.29 V
∆Vo(cm)/∆T
common mode output
voltage variation with
temperature
−
−1.8
−
mV/°C
SRo(se)
single-ended output slew
rate
−
275
−
V/µs
Ro
output resistance
−
15
26
Ω
Co
output capacitance
−
3
−
pF
Vo(max)(p-p)
Variable gain amplifier dynamic performance; CL = 5 pF; RL = 680 Ω (see Figs 6, 7, 8, 9 and 10)
HD2
HD3
∆HD3/∆T
2nd harmonic distortion
3rd harmonic distortion
Vo = Vo(max)
fi = 0.5 MHz
−
−80
−67
dBc
fi = 4.43 MHz
−
−77
−67
dBc
fi = 12.5 MHz
−
−76
−65
dBc
fi = 21.4 MHz
−
−74
−62
dBc
fi = 0.5 MHz
−
−64
−60
dBc
fi = 4.43 MHz
−
−64
−59
dBc
fi = 12.5 MHz
−
−62
−58
dBc
fi = 21.4 MHz
−
−61
−57
dBc
−
80
−
mdB/°C
Vo = Vo(max);
Tamb = 25 °C
3rd harmonic distortion
fi = 21.4 MHz
variation with temperature
Reference voltage output ADC: pin CMADC
Vref(CMADC)
ADC reference output
voltage
referenced to VDDA;
Tamb = 25 °C
VDDA − 1.64 VDDA − 1.45 VDDA − 1.26 V
Ro(CMADC)
output resistance
Tamb = 25 °C
−
17
26
Ω
−
−0.11
−
mV/°C
∆Vref(CMADC)/∆T ADC reference output
voltage variation with
temperature
1999 Oct 08
7
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
SYMBOL
PARAMETER
TDA9901
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Io(CMADC)(max)
maximum output current
−
1.0
−
mA
Co(CMADC)
output capacitance
−
3
−
pF
Reference voltage output VGA: pin CMVGA
Vref(CMVGA)
VGA reference output
voltage
referenced to VDDA;
Tamb = 25 °C
Ro(CMVGA)
output resistance
Tamb = 25 °C
VDDA − 2.48 VDDA − 2.30 VDDA − 2.17 V
−
9
20
Ω
∆Vref(CMVGA)/∆T VGA reference output
voltage variation with
temperature
−
1.75
−
mV/°C
Io(CMVGA)(max)
maximum output current
−
1.0
−
mA
Co(CMVGA)
output capacitance
−
3
−
pF
Gain switching characteristics (in latched mode); fCLK = 52 MHz; Tamb = 25°C; (see Fig.3)
th
input data hold time
2.0
−
−
ns
tsu
input data set-up time
3.8
−
−
ns
tW
input data pulse width
5.8
−
−
ns
tPD1
propagation delay time
−
4.2
5.9
ns
tset1
gain settling time
−
2.6
3.2
ns
10 to 90% full scale
if ±6 dB gain
change; note 3
Gain switching characteristics (in transparent mode); fCLK = 52 MHz; Tamb = 25°C; (see Fig.4)
tPD2
propagation delay time
tset2
gain settling time
10 to 90% full scale
if ±6 dB gain
change; note 4
−
6.7
9.5
ns
−
5.4
6.9
ns
Clock timing input: pins CLK and CLKN (see Fig.3)
fCLK(max)
maximum clock frequency
52
−
−
MHz
tCPL
clock LOW pulse width
4.0
−
−
ns
tCPH
clock HIGH pulse width
4.0
−
−
ns
tr
rise time
−
4
−
ns
tf
fall time
−
4
−
ns
Digital inputs: pins TE, GRAY0, GRAY1 and GRAY2
VIL
LOW-level input voltage
0
−
0.8
V
VIH
HIGH-level input voltage
2.0
−
VDDD
V
IIH
HIGH-level input current
−10
−
+10
µA
IIL
LOW-level input current
−10
−
+10
µA
Ci
input capacitance
−
−
3
pF
Clock inputs in TTL mode
VIL
LOW-level input voltage
note 5
0
−
0.8
V
VIH
HIGH-level input voltage
note 5
2.0
−
VDDD
V
IIH
HIGH-level input current
15
−
80
µA
IIL
LOW-level input current
−40
−
−10
µA
1999 Oct 08
8
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
SYMBOL
PARAMETER
CONDITIONS
MIN.
−
input capacitance
Ci
TDA9901
TYP.
MAX.
UNIT
−
2
pF
Clock inputs in differential mode
VIL
LOW-level input voltage
VDDA = 5.0 V; note 6 3.19
−
3.52
V
VIH
HIGH-level input voltage
VDDA = 5.0 V; note 6 3.83
−
4.12
V
IIH
HIGH-level input current
15
−
80
µA
IIL
LOW-level input current
−40
−
−5
µA
Ci
input capacitance
−
−
2
pF
∆Vi(CLK )(p-p)
differential AC input
voltage for switching
CLK or CLKN
(peak-to-peak value)
0.1
−
2.0
V
DC voltage
level = 2.5 V
Notes
1. Due to on-chip regulator behaviour a warm-up time of 1 minute (typical) is recommended for optimal performance.
2. The analog output voltages are positive with respect to AGND.
3. In latching mode (TE = 0), the gain settling is latched at the rising edge of the clock input.
4. In transparent mode, the gain settling is directly controlled by the input data pattern.
5. The circuit may be used with a single TTL clock on CLK or CLKN. The non used clock pin has to be decoupled to
ground with a 100 nF capacitance.
6. There are four modes of operation for the clock inputs in non TTL mode:
a) PECL mode 1: (DC level vary 1 : 1 with VDDA) CLK and CLKN inputs are differential PECL levels.
b) PECL mode 2: (DC level vary 1 : 1 with VDDA) CLK input is at PECL level and gain change takes place on the
rising edge of the clock input signal when in latched mode. A DC level of 3.65 V has to be applied on CLKN
decoupled to VSSD via a 100 nF capacitor.
c) PECL mode 3: (DC level vary 1 : 1 with VDDA) CLKN input is at PECL level and gain change takes place on the
rising edge of the clock input signal when in latched mode. A DC level of 3.65 V has to be applied on CLK
decoupled to VSSD via a 100 nF capacitor.
d) AC driving mode 4: when driving the CLK input directly and with any AC signal of minimum 0.1 V (p-p) and with
a DC level of 2.5 V, the gain change takes place on the rising edge of the clock signal. When driving the CLKN
input with the same signal, gain change takes place on the falling edge of the clock signal. It is recommended to
decouple the CLKN or CLK input to VSSD via a 100 nF capacitor.
Table 1
Input coding
GREY INPUT DATA CODE
STATE
GAIN (dB)
D2
D1
D0
0
0
0
0
minimum
1
0
0
1
minimum + 6
2
0
1
1
minimum + 12
3
0
1
0
minimum + 18
4
1
1
0
minimum + 24
Other
−
−
−
minimum + 24
1999 Oct 08
9
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
tr
handbook, full pagewidth
TDA9901
tf
LOW
CLK
50 %
HIGH
tCPH
tCPL
LOW
GRAY0
GRAY1
gain N + 1
gain N
50 %
GRAY2
HIGH
tsu
th
OUT
and
OUTN
90 %
gain N + 1
gain N
10 %
tset1
Vo(max)
0.5Vo(max)
tPD1
0V
MGM964
Fig.3 Latched mode timing diagram.
handbook, full pagewidth
LOW
GRAY0
GRAY1
gain N + 1
gain N
50 %
GRAY2
HIGH
OUT
and
OUTN
gain N
gain N + 1
90 %
10 %
Vo(max)
0.5Vo(max)
tset2
tPD2
0V
MGM965
Fig.4 Transparent mode timing diagram with CLK HIGH.
1999 Oct 08
10
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
handbook, full pagewidth
CMVGA
IN
FILTER
5
TDA9901
15
47 nF
OUT
Vi
680 Ω
6
TDA8768
(ADC)
TDA9901TS
100 Ω
sine wave
generator
100
Ω
100
nF
INN 7
680 Ω
14
42
C1(1)
Vi
OUTN
C2(1)
47 nF
D0...11 12
43
36
CLK
dB
(2)
(3)
30 MHz
FCE306
(1) C1 and C2 represent the board line capacitance. They represent about 5 pF with the TDA8768 input capacitance. Special
care has to be taken to minimize this load in order to have the best dynamic performance.
(2) The HD2 and HD3 of the TDA8768 is lower than that measured on the TDA9901.This measurement method is preferred to
conventional methods due to its low contribution to the HD2.
(3) The chain measurement shows the harmonic distortion of the TDA9901 as the measurement from TDA8768 is negligible.
Fig.5 Dynamic distortion measurement diagram.
FCE307
−55
HD
(dBc)
−60
FCE308
−55
HD
(dBc)
−60
handbook, halfpage
handbook, halfpage
−65
−65
−70
−70
(1)
−75
(1)
(2)
−75
(2)
−80
−80
−85
10−1
1
10
f (MHz)
−85
10−1
102
1
10
(1) HD3
(2) HD2
(1) HD3
(2) HD2
Typical condition; 2 V (p-p) differential output.
Typical condition; 2 V (p-p) differential output.
Fig.6
Fig.7
Harmonic distortion as a function of
frequency for minimum gain.
1999 Oct 08
11
f (MHz)
102
Harmonic distortion as a function of
frequency for minimum gain plus 6 dB.
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
FCE309
−55
HD
(dBc)
−60
TDA9901
FCE310
−55
HD
(dBc)
−60
handbook, halfpage
handbook, halfpage
(1)
−65
−65
(1)
−70
−70
−75
−75
(2)
(2)
−80
−80
−85
10−1
1
10
f (MHz)
−85
10−1
102
1
10
(1) HD3
(2) HD2
(1) HD3
(2) HD2
Typical condition; 2 V (p-p) differential output.
Typical condition; 2 V (p-p) differential output.
Fig.8
Fig.9
Harmonic distortion as a function of
frequency for minimum gain plus 12 dB.
FCE311
−55
HD
(dBc)
−60
handbook, halfpage
−65
(1)
−70
−75
(2)
−80
−85
10−1
1
10
f (MHz)
102
(1) HD3
(2) HD2
Typical condition; 2 V (p-p) differential output.
Fig.10 Harmonic distortion as a function of
frequency for minimum gain plus 24 dB.
1999 Oct 08
12
f (MHz)
102
Harmonic distortion as a function of
frequency for minimum gain plus 18 dB.
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
APPLICATION INFORMATION
handbook, full pagewidth
GRAY0
1
20
GRAY1
TE
2
19
GRAY2
CLK
3
18
CLKN(1)
4
17
100 nF
100
nF
3.3 V
47
µF
5
16
TDA9901TS
100 nF
IN
VIN
100 Ω
47 nF
6
15
7
14
n.c.
8
13
n.c.
9
12
n.c.
10
11
100 Ω
INN
1:1
R1(2)
OUT
47 nF
OUTN
n.c.
100 nF
5V
MGM966
(1) Single-ended clock signal can be applied if required.
(2) R1 and R2 should be at least 680 Ω.
Fig.11 Application diagram.
1999 Oct 08
47
µF
R2(2)
13
100
nF
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
PACKAGE OUTLINE
SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm
D
SOT266-1
E
A
X
c
y
HE
v M A
Z
11
20
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
1
10
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.5
0.15
0
1.4
1.2
0.25
0.32
0.20
0.20
0.13
6.6
6.4
4.5
4.3
0.65
6.6
6.2
1.0
0.75
0.45
0.65
0.45
0.2
0.13
0.1
0.48
0.18
10
0o
Note
1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
90-04-05
95-02-25
SOT266-1
1999 Oct 08
EUROPEAN
PROJECTION
14
o
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
SOLDERING
TDA9901
If wave soldering is used the following conditions must be
observed for optimal results:
Introduction to soldering surface mount packages
• Use a double-wave soldering method comprising a
turbulent wave with high upward pressure followed by a
smooth laminar wave.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “Data Handbook IC26; Integrated Circuit Packages”
(document order number 9398 652 90011).
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint
longitudinal axis is preferred to be parallel to the
transport direction of the printed-circuit board;
There is no soldering method that is ideal for all surface
mount IC packages. Wave soldering is not always suitable
for surface mount ICs, or for printed-circuit boards with
high population densities. In these situations reflow
soldering is often used.
– smaller than 1.27 mm, the footprint longitudinal axis
must be parallel to the transport direction of the
printed-circuit board.
Reflow soldering
The footprint must incorporate solder thieves at the
downstream end.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
• For packages with leads on four sides, the footprint must
be placed at a 45° angle to the transport direction of the
printed-circuit board. The footprint must incorporate
solder thieves downstream and at the side corners.
Several methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating, soldering and cooling) vary
between 100 and 200 seconds depending on heating
method.
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Typical reflow peak temperatures range from
215 to 250 °C. The top-surface temperature of the
packages should preferable be kept below 230 °C.
Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Wave soldering
Manual soldering
Conventional single wave soldering is not recommended
for surface mount devices (SMDs) or printed-circuit boards
with a high component density, as solder bridging and
non-wetting can present major problems.
Fix the component by first soldering two
diagonally-opposite end leads. Use a low voltage (24 V or
less) soldering iron applied to the flat part of the lead.
Contact time must be limited to 10 seconds at up to
300 °C.
To overcome these problems the double-wave soldering
method was specifically developed.
When using a dedicated tool, all other leads can be
soldered in one operation within 2 to 5 seconds between
270 and 320 °C.
1999 Oct 08
15
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
TDA9901
Suitability of surface mount IC packages for wave and reflow soldering methods
SOLDERING METHOD
PACKAGE
REFLOW(1)
WAVE
BGA, SQFP
not suitable
suitable(2)
HLQFP, HSQFP, HSOP, HTQFP, HTSSOP, SMS
not
PLCC(3), SO, SOJ
suitable
LQFP, QFP, TQFP
SSOP, TSSOP, VSO
suitable
suitable
suitable
not
recommended(3)(4)
suitable
not
recommended(5)
suitable
Notes
1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum
temperature (with respect to time) and body size of the package, there is a risk that internal or external package
cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the
Drypack information in the “Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods”.
2. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink
(at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version).
3. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction.
The package footprint must incorporate solder thieves downstream and at the side corners.
4. Wave soldering is only suitable for LQFP, TQFP and QFP packages with a pitch (e) equal to or larger than 0.8 mm;
it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
5. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is
definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1999 Oct 08
16
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
NOTES
1999 Oct 08
17
TDA9901
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
NOTES
1999 Oct 08
18
TDA9901
Philips Semiconductors
Product specification
Wideband differential digital controlled
variable gain amplifier
NOTES
1999 Oct 08
19
TDA9901
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Internet: http://www.semiconductors.philips.com
SCA 68
© Philips Electronics N.V. 1999
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Printed in The Netherlands
545004/25/02/pp20
Date of release: 1999
Oct 08
Document order number:
9397 750 05272