ZXFBF08
8 Channel Buffer Device
DEVICE DESCRIPTION
The ZXFBF08 is a low cost, high slew rate, octal buffer
amplifier. Built using the Zetex CA700 technology, this
buffer has a small signal bandwidth of greater than
100MHz and a 1 volt pk-pk bandwidth of greater than
20 MHz. Each channel draws only 1.9mA. The device
operates from a ±5 volt supply, which makes it ideal in
a majority of applications.
This space saving buffer may be used in a wide variety
of applications such as, video switching matrix,
multi-channel instrumentation equipment, and A/D
input buffer, etc.
FEATURES AND BENEFITS
•
•
•
•
•
•
8 Buffers per package
100MHz bandwidth
Low cost
Low supply current (1.9mA per buffer)
No thermal runaway
20 pin SOIC package
APPLICATIONS
•
•
•
•
Video Switching Matrix input buffer
Instrumentation
Multi-channel A/D input buffer
Multi-isolation buffer
PART
NUMBER
ZXFBF08W20
PACKAGE
SOIC20W
PART MARK
ZXFBF08
ORDERING INFORMATION
PART NUMBER
ZXFBF08W20TC
CONTAINER
Reel 13”
INCREMENT
1000
RELATED PRODUCTS
ZXFBF04 4 Channel Buffer
ZXFBF05
4 Channel Buffer with high capacitance
drive
CONNECTION DIAGRAM
ZXFBF25 4 Channel Buffer with output enable
OUT1
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OUT8
IN1
V-
OUT2
IN2
OUT3
IN3
V-
OUT4
IN4
IN8
V+
OUT7
IN7
OUT6
IN6
V+
OUT5
IN5
ISSUE 2 - OCTOBER 2000
1
ZXFBF08
ABSOLUTE MAXIMUM RATINGS
Voltage on any pin
Operating temperature range
Storage Temperature
20V (relative to V-)
0 to 70°C (de-rated for -40 to 85°C)
-55 to 125°C
ELECTRICAL CHARACTERISTICS
Test Conditions: Temperature =25°C, V+ = 5.00, V- = -5.00V, R
L
= 1kΩ, C
L
= 10pF
Parameter
Offset Voltage
Offset Voltage Drift
Supply Current
Input Bias Current
Output Voltage
DC Gain
DC Gain
Sink Current
Source Current
Input Resistance
Output Resistance
Bandwidth
Slew Rate
Voltage Noise
Differential Gain
NTSC
Differential Phase
NTSC
Differential Gain
PAL
Differential Phase
PAL
Channel Isolation
10 – 100 kHz
F = 3.58MHz, V
in
= 0.286Vp-p,
DC
∆V
in
= 0 to 0.714V
20mVp-p,
1.0Vp-p
Conditions
V
in
= 0V
V
in
= 0V
All inputs = 0V
V
in
= 0V
R
L
= 1kΩ
R
L
= 10kΩ
V
in
= ± 0.5V, R
L
= 1kΩ
V
offset
= 0.0V
V
in
= ±0.5V, R
L
= 1kΩ
V
offset
= 0.25V
V
in
= 0V, V
out
=0.5V
V
in
= 0V, V
out
=-0.5V
0.95
0.95
1.0
6.0
10
5
0.1
Min.
-15
Typical
-
20
15
0.5
±1
±4
0.98
0.99
2.2
9.0
20
10
100
20
40
15
0.1
0.15
0.1
F = 4.43MHz, V
in
= 0.286Vp-p,
DC
∆V
in
= 0 to 0.714V
V
in
= 370mVp-p, RL = 1kΩ
F = 4 MHz
0.15
-60
1.00
1.00
5.0
12.0
100
15
25
2.0
Max.
15
Units
mV
V/°C
mA
µA
V
V/V
V/V
mA
mA
MΩ
Ω
MHz
V/µs
nV/√
Hz
%
Degrees
%
Degrees
dB
NOTES
Test circuit for measuring channel isolation.
Channel Isolation = 20 x LOG
10
(V
out
/ V
in
) dB
Vin=370mV pk-pk,
F = 4 MHz
V
out
RL = 1kΩ
ISSUE 2 - OCTOBER 2000
2
ZXFBF08
APPLICATION CIRCUIT
AC Coupled Configuration
V+
100nF
_
C
V
in
R
S
100nF
V
out
+
1/8 ZXFBF08
R
L
V-
NOTE.
Rs: Source Resistor, provides DC bias for buffer input. Rs 10kΩ
Both 100nF decoupling capacitors should be situated close to device supply pins.
TYPICAL CHARACTERISTICS
0.991
-40
V+ = 5V
R
L
= 1k
Ω
DC Gain (V
in
/V
out
)
Attenation (dB)
-25
0
25
50
75
100
0.990
0.989
0.988
0.987
0.986
-50
-50
-60
-70
-80
-90
-100
0.1
1
10
Temperature (°C)
Frequency (MHz)
DC Differential Gain v Temperature
Channel Isolation v Frequency
ISSUE 2 - OCTOBER 2000
4
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