Video Amplifier. XR-7000 Datasheet

XR-7000 Amplifier. Datasheet pdf. Equivalent


EXAR XR-7000
ADVANCE INFORMATION
XR·7000
Log Vide«J) Amp~nfnelt"
GENERAL DESCRIPTION
The XR-7000 is a universal logarithmic video amplifier
chip. Because of its extremely wide bandwidth, it can
be used in systems ranging from audio applications to
radar subsystems. The XR-7000 utilizes seven separate
precision logarithmic elements. These elements may
be used separately for small dynamic ranges or cas-
caded to offer an extremely wide dynamic range of op-
eration.
The XR-7000 has an internal band-gap voltage refer-
ence, a differential video summing amplifier, and a pre-
cision die temperature sensor, to aid in its system inter-
facing. Also included are internal power supply regula-
tors to provide excellent power supply rejection.
The XR-7000 is available in a 40-Pin ceramic or plastic
package. It is designed to operate from dual 11 to 15
volt power supplies
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Seven Uncommitted Logging Elements
Internal Band-Gap Voltage Reference
Dual Tracking Regulators On-Board
Precision Die Temperature Sensor
APPLICATIONS
Receiver Subsystems
Radar Subsystems
Spectrum Analyzers
Power Meters
Test Equipment
Video Cartridge Tape Recorders
Audio Tape Recorders
Smoke Detectors
Chemical Process Systems
Ultrasonic Imaging
Medical Equipment (Tomography)
ABSOLUTE MAXIMUM RATINGS
Power Supply
Power Dissipation
Derate Above at 25°C
Operating Temperature
Ceramic
Plastic
Any Input Voltage
30V
1.0W
5 mW/oC
-55°C to + 125°C
O°C to + 700 e
VCC + .5V to VEE - .5V
ORDERING INFORMATION
Part Number
XR-7000M
XR-7000CP
Package
Ceramic
Plastic
Operating Temperature
- 55°C to + 125°C
DOC to +70°C
SYSTEM DESCRIPTION
The main section of the XR-7000 comprises seven loga-
rithmic sections. Each section has a dynamic range of
approximately 12 dBV. For wide range applications, the
seven sections may be cascaded to provide a total dy-
namic range of over 90 dBV. The logarithmic sections
provide current outputs, which can be summed and
converted to voltages, using the on-board summing
amplifiers. A unipolar output with built-in offset is also
available for use with an external I to V converter.
The precisi~n die temperature sensor is useful in dc-
coupled applications to provide stability over its tem-
perature range.
1-411


XR-7000 Datasheet
Recommendation XR-7000 Datasheet
Part XR-7000
Description Log Video Amplifier
Feature XR-7000; ADVANCE INFORMATION XR·7000 Log Vide«J) Amp~nfnelt" GENERAL DESCRIPTION The XR-7000 is a universal.
Manufacture EXAR
Datasheet
Download XR-7000 Datasheet




EXAR XR-7000
XR·7000
ELECTRICAL CHARACTERISTICS
Tast Conditions: With VCC = + 12V, VEE + -12V, TAMB = 25°C, dual polarity output load resistances =
100 ohms, unipolar internal load resistance = 200 ohms, unless specified otherwise.
SYMBOL
PARAMETERS
Vcc
Vee
Icc
lee
+Vout
-Vout
Positive Supply Voltage
Positive Supply Voltage
Positive Supply Current
Negative Supply Current
Positive Regulator
Output Voltage
Negative Regulator
Output Voltage
LOG SECTION
LG
BW
Tr
Tpd
Trec
lin
PSRR
VTRAC
Ttcv
Vout
Vout
Rout
Nout
Log Range per Element
Bandwidth
Risetime
Prop. Delay
Saturation Recovery
Input Bias Current .
Power Supply Rejection
Ratio
Tracking of Regulators
Output Tempco
Output Voltage
per Stage
Output Voltage
per Stage
Unipolar Output
Resistance
Output Noise
MIN
11
11
5.8
-5.8
14
6
60
150
TYP
12
12
15
15
6.0
-6.0
12
30
12
10
20
2
65
20
50
118
120
200
100
MAX
15
15
6.2
-6.2
25
12
250
UNIT
V
V
mA
mA
V
V
CONDITIONS
Reference Untrimmed
Reference Untrimmed
dB
MHz
ns
ns
ns
pA
dBV
ppm
ppm
mV
mV
ohms
/LVrms
Dual Polarity Output
100n Diff. Load
10% Points
DC to 100 MHz
Trimmed
Unipolar
Bipolar each Output
Unipolar connection
1·412





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