CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. To achieve optimum AC performance, the input stage was designed without protective diode clamps. Exceeding the maximum differential input
voltage results in reverse breakdown of the base-emitter junction of the input transistors and probable degradation of the input parameters
especially V
OS
, I
OS
and Noise.
2.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
INPUT CHARACTERISTICS
Offset Voltage
V
SUPPLY
=
±15V,
C
L
≤10pF,
R
L
= 1kΩ, Unless Otherwise Specified
TEST
CONDITIONS
TEMP (
o
C)
MIN
TYP
MAX
UNITS
-
-
-
25
-2, -5
-9
Full
25
Full
Full
25
Full
Full
Full
25
25
25
25
25
25
-
-
-
-
-
-
-
-
-
-
±10
50
-
-
-
-
-
15
-
-
10
9
-
0.04
0.8
-
10
±11.5
90
3
20
2.4
1.5
4.6
25
40
40
-
18
30
-
2
3
-
-
-
-
-
-
-
-
mV
mV
mV
µV/
o
C
µA
µA
µA/
o
C
µA
µA
nA/
o
C
V
kΩ
pF
nV/√Hz
pA/√Hz
µV
P-P
µV
RMS
Average Offset Voltage Drift (Note 7)
Bias Current
-
-
-
Average Bias Current Drift (Note 7)
Offset Current
-
-
-
Offset Current Drift
Common Mode Range
Differential Input Resistance
Differential Input Capacitance
Input Noise Voltage
Input Noise Current
Input Noise Voltage (Note 7)
-
-
-
-
f = 1kHz
f = 1kHz
0.1Hz to 10Hz
0.1Hz to 1MHz
TRANSFER CHARACTERISTICS
Large Signal Voltage Gain (Note 7)
V
O
=
±5V
25
Full
Common Mode Rejection Ratio (Note 7)
∆V
CM
=
±10V
-2, -5
-9
Minimum Stable Gain
Unity Gain Bandwidth (Note 7)
Gain Bandwidth Product (Note 7)
Phase Margin
V
O
=
±100mV
V
O
=
±100mV
25
25
25
25
3
2
70
65
+1
-
-
-
6
-
89
89
-
45
50
65
-
-
-
-
-
-
-
-
kV/V
kV/V
dB
dB
V/V
MHz
MHz
Degrees
2
HA-2544
Electrical Specifications
PARAMETER
OUTPUT CHARACTERISTICS
Output Voltage Swing
Full Power Bandwidth (Note 6)
Peak Output Current (Note 7)
Continuous Output Current (Note 7)
Output Resistance
TRANSIENT RESPONSE
Rise Time (Note 4)
Overshoot (Note 4)
Slew Rate
Settling Time (Note 5)
VIDEO PARAMETERS
R
L
= 1kΩ (Note 8)
Differential Phase (Note 9)
Differential Gain (Notes 3, 9)
25
25
25
Gain Flatness
5MHz
10MHz
Chrominance to Luminance Gain (Note 10)
Chrominance to Luminance Delay (Note 10)
POWER SUPPLY CHARACTERISTICS
Supply Current
Power Supply Rejection Ratio (Note 7)
V
S
=
±10V
to
±20V
Full
-2, -5
-9
NOTES:
3. A
D
(%)
=
10
A
(
dB
)
D
--------------------
-
20
V
SUPPLY
=
±15V,
C
L
≤10pF,
R
L
= 1kΩ, Unless Otherwise Specified
(Continued)
TEST
CONDITIONS
TEMP (
o
C)
MIN
TYP
MAX
UNITS
Full
25
25
25
Open Loop
25
±10
3.2
±25
±10
-
±11
4.2
±35
-
20
-
-
-
-
-
V
MHz
mA
mA
Ω
25
25
25
25
-
-
100
-
7
10
150
120
-
-
-
-
ns
%
V/µs
ns
-
-
-
-
-
-
-
0.03
0.0026
0.03
0.10
0.12
0.1
7
-
-
-
-
-
-
-
Degree
dB
%
dB
dB
dB
ns
25
25
25
25
-
70
65
10
80
80
15
-
-
mA
dB
dB
–
1
×
100 .
4. For Rise Time and Overshoot testing, V
OUT
is measured from 0 to +200mV and 0 to -200mV.
5. Settling Time is specified to 0.1% of final value for a 10V step and A
V
= -1.
Slew Rate
6. Full Power Bandwidth is guaranteed by equation: Full Power Bandwidth
= ----------------------------
(
V
-
=
5V
)
.
2π V
PEAK PEAK
7. Refer to typical performance curve in Data Sheet.
8. The video parameter specifications will degrade as the output load resistance decreases.
9. Tested with a VM700A video tester, using a NTC-7 Composite input signal. For adequate test repeatability, a minimum warm-up of 2 minutes is
suggested. A
V
= +1.
10. C-L Gain and C-L Delay was less than the resolution of the test equipment used which is 0.1dB and 7ns, respectively.
3
HA-2544
Test Circuits and Waveforms
NOTES:
V+
R
S
V
IN
+
11. V
S
=
±15V.
12. A
V
= +1.
V
OUT
C
L
R
L
-
13. R
S
= 50Ω or 75Ω (Optional).
14. R
L
= 1kΩ.
15. C
L
< 10pF.
16. V
IN
for Large Signal =
±5V.
17. V
IN
for Small Signal = 0 to
+200mV and 0 to -200mV.
V-
FIGURE 1. TRANSIENT RESPONSE
V
IN
V
IN
V
OUT
V
OUT
V
OUT
= 0 to +10V
Vertical Scale: V
IN
= 5V/Div.; V
OUT
= 2V/Div.
Horizontal Scale: 100ns/Div.
LARGE SIGNAL RESPONSE
V
OUT
= 0 to +200mV
Vertical Scale: V
IN
= 100mV/Div.; V
OUT
= 100mV/Div.
Horizontal Scale: 100ns/Div.
SMALL SIGNAL RESPONSE
SETTLING
POINT
BAL
1
2
3
4
8
7
6
5
NC
V+
OUT
5kΩ
5kΩ
2kΩ
-IN
+IN
V-
-
+
2kΩ
V
IN
-
+
V
OUT
R
T
BAL
NOTES:
18. A
V
= -1.
19. Feedback and summing resistor ratios should be 0.1% matched.
20. HP5082-2810 clipping diodes recommended.
21. Tektronix P6201 FET probe used at settling point.
FIGURE 2. SETTLING TIME TEST CIRCUIT
FIGURE 3. OFFSET VOLTAGE ADJUSTMENT
NOTE: Tested offset adjustment range is |V
OS
+ 1mV| minimum
referred to output. Typical range for R
T
= 20kΩ is approximately
±30mV.
4
HA-2544
Schematic Diagram
V+
R
1
Q
P24
R
2A
Q
P23
V-
R
7
Q
P20
Q
N21
R
28
R
9
Q
P19
R
36
Q
P33
D
34
D
37
Q
P44
Q
N43
D
38
D
39
D
40
R
10
V+
Q
N18
R
11
Q
P16
Q
N17
R
13
Q
P15
R
14
V+
Q
N14
Q
N13
R
15
R
16
Q
N55
Q
N60
Q
N11
Q
N12
Q
N48
R
31
V-
BAL
BAL
R
12
Q
N59
Q
N9
Q
N10
D
41
Q
P52
R
24
200Ω
V-
Q
N51
+INPUT
Q
N1
Q
N2
R
25
200Ω
-INPUT
R
30
R
35
Q
N53
R
32
36Ω
OUTPUT
R
33
36Ω
Q
P54
Q
N22
R
8
Q
N36
C
1
Q
N50
Q
P5
Q
P57
Q
P58
R
2
R
4
Q
P6
R
37
Q
P32
Q
N46
5kΩ
R
38
5kΩ
R
39
R
17
R
18
Application Information
The HA-2544 is a true differential op amp that is as versatile
as any op amp but offers the advantages of high unity gain
bandwidth, high speed and low supply current. More
important than its general purpose applications is that the
HA-2544 was especially designed to meet the requirements
found in a video amplifier system. These requirements
include fine picture resolution and accurate color rendition,
and must meet broadcast quality standards.
In a video signal, the video information is carried in the
amplitude and phase as well as in the DC level. The amplifier
must pass the 30Hz line rate Iuminance level and the 3.58MHz
5
(NTSC) or 4.43MHz (PAL) color band without altering phase or
gain. The HA-2544’s key specifications aimed at meeting this
include high bandwidth (50MHz), very low gain flatness
(0.12dB at 10MHz), near unmeasurable differential gain and
differential phase (0.03% and 0.03 degrees), and low noise
(20nV/√Hz). The HA-2544 meets these guidelines.
The HA-2544 also offers the advantage of a full output voltage
swing of
±10V
into a 1kΩ load. This equates to a full power
bandwidth of 2.4MHz for this
±10V
signal. If video signal
levels of
±2V
maximum is used (with R
L
= 1kΩ), the full power
bandwidth would be 11.9MHz without clipping distortion.
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