Obsolescence Notice
This product is obsolete.
This information is available for your
convenience only.
For more information on
Zarlink’s obsolete products and
replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
ADVANCE INFORMATION
DS3613 - 1.0
SL1615
WIDEBAND LOG IF STRIP AMPLIFIER
The SL1615 is a bipolar monolithic integrated circuit
wideband amplifier intended for use in successive detection
logarithmic IF strips, operating at centre frequencies between
10MHz and 60MHz. The device provides amplification,
limiting and rectification, is suitable for direct coupling and
incorporates supply line decoupling. The mid-band voltage
gain of the SL1615 is typically 12dB.
MP8
FEATURES
s
s
s
s
s
s
s
Well Defined Gain
4.5dB Noise Figure
High I/P impedance
Low O/P impedance
150MHz Bandwidth
On-Chip Supply Decoupling
Low External Component Count
Fig.1 Pin connections - top view
ABSOLUTE MAXIMUM RATINGS
Storage temperature range
Operating temperature range
Thermal resistance
Chip-to-ambient
Chip-to-case
Maximum instantaneous voltage
at video output
Supply voltage
-55°C to +150°C
-30°C to +85°C
163°C/W
57°C/W
+12V
9V
APPLICATIONS
s
s
s
Logarithmic IF Strips with Gains up to 108dB and
Linearity Better than 2dB
Low Cost Radar
Radio Telephone Filed Strength Meters
ORDERING INFORMATION
SL1615 NA MP
Fig.2 Circuit diagram
SL1615
ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed over the following condltions (unless otherwise stated)
Temperature = +22°C
±2°C,
Supply Voltage = +6V, DC Connection between Input and Bias Pins
Characteristic
Voltage Gain, f = 30MHz
Voltage Gain, f = 60MHz
Upper Cut-off frequency (Fig.3)
Lower Cut-off frequency (Fig.3)
Propagination Delay
Maximum rectified Video Output
Current (Fig.4 and 5)
Variation of Gain with Supply
Voltage
Variation of Maximum Rectified
Output Current with Supply
Voltage
Maximum Input Signal before
Overload
Noise Figure (Fig.6)
Supply Current
Maximum RF Output Voltage
Value
Min.
10
10.7
130
170
5
2
0.80
1.40
Typ.
Max.
14
13.3
Units
dB
dB
MHz
MHz
ns
mA
f = 60MHz, 0.5V rms Input
Conditions
10Ω Source, 8pF Load
10Ω Source, 8pF Load
10Ω Source, 8pF Load
10Ω Source, 8pF Load
0.7
db/V
25
%/V
1.8
1.9
V/rms
See Note below
4
11.5
1.2
20
dB
mA
Vp-p
f = 60MHz, Rs = 450Ω
Note: Overload occurs when the input signal reaches a level sufficent to forward bias the base-collector junction of TR1 on peaks
Fig.3 Voltage gain v. frequency
SL1615
Fig.4 Rectified Output Current v. Input Signal
Fig.5 Maximum Rectified Output Current v. Temperature
Fig.7 Input Admittance with Open Circuit Output
Fig.6 Typical Noise Figure v. Temperature
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