INTERSIL ISL59110

ISL59110
®
Data Sheet
August 8, 2005
FN6104.1
8MHz Rail-to-Rail Composite Video Driver
Features
The ISL59110 is a single rail-to-rail 3-pole output
reconstruction filter with a -3dB roll-off frequency of 8MHz
and a slew rate of 40V/µs, with input signal DC restoration
accomplished with an internal sync tip clamp. Operating
from single supplies ranging from +2.5V to +3.6V and
sinking an ultra-low 2mA quiescent current, the ISL59110 is
ideally suited for low power, battery-operated applications. It
also features inputs capable of reaching down to 0.15V
below the negative rail. Additionally, an enable high pin shuts
the part down in under 14ns.
• 3rd order 8MHz reconstruction filter
The ISL59110 is designed to meet the needs for micropower
and bandwidth required in battery-operated communication,
instrumentation, and modern industrial applications such as
video on demand, cable set-top boxes, DVD players, and
HDTV. The ISL59110 is offered in a space-saving SC-70
package guaranteed to a 1mm maximum height constraint
and specified for operation from -40°C to +85°C temperature
range.
• 40V/µs slew rate
• Low supply current = 2mA
• Power-down current less than 3µA
• Supplies from 2.5V to 3.6V
• Rail-to-rail output
• Input to 0.15V below VS• Input sync tip clamp
• SAG correction reduces AC coupling capacitor size
• Pb-free plus anneal available (RoHS compliant)
Applications
• Video amplifiers
• Portable and handheld products
• Communications devices
Ordering Information
• Video on demand
PART NUMBER
(See Note)
PACKAGE
(Pb-Free)
TAPE &
REEL
PKG. DWG. #
ISL59110IEZ-T7
6-Pin SC-70
7” (3K pcs)
P6.049A
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
• Cable set-top boxes
• Satellite set-top boxes
• DVD players
• HDTV
• Personal video recorders
Pinout
ISL59110
(6-PIN SC-70)*
TOP VIEW
IN+ 1
GND 2
SAG 3
6 VS+
LPF
+
-
5 EN
4 OUT
*1mm MAXIMUM HEIGHT GUARANTEED
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright © Intersil Americas Inc. 2005. All Rights Reserved.
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ISL59110
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage from VS+ to GND . . . . . . . . . . . . . . . . . . . . . . . 3.6V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . VS+ +0.3V to GND -0.3V
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +125°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +125°C
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.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
DESCRIPTION
VS+ = 3.3V, TA = 25°C, RL = 150Ω to GND, CL = 0.1µF, unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
3.6
V
2.75
mA
3
µA
INPUT CHARACTERISTICS
VCC
Supply Voltage Range
2.5
IDD-ON
Quiescent Supply Current
VIN = 500mV, EN = VDD, no load
IDD-OFF
Shutdown Supply Current
EN = 0V
VOLS
Output Level Shift Voltage
VIN = 0V, no load
60
130
200
mV
VCLAMP
Input Voltage Clamp
IIN = -1mA
-40
-15
+10
mV
ICLAMP_CHG
Clamp Charge Current
VIN = VCLAMP - 100mV
-6
-3
mA
ICLAMP_DCHG
Clamp Discharge Current
VIN = 500mV
2.5
5
7.5
µA
RIN
Input Resistance
0.5V < VIN < 1.0V
0.5
3
AV
Voltage Gain
RL = 150Ω
1.95
2.0
ASAG
SAG Correction DC Gain to VOUT
SAG open
PSRR
DC Power Supply Rejection
VDD = 2.7V to 3.3V
VOH
Output Voltage High Swing
VIN = 2V, RL = 150Ω to GND
ISC
Output Short-Circuit Current
VIN = 2V, to GND through 10Ω
2
MΩ
2.04
V/V
2.25
V/V
43
63
dB
2.85
3.2
V
-94
VIN = 100mV, out short to VDD through 10Ω
65
115
-3
0
IENABLE
Enable Current
±3.3V, enable pin = 0V
VIL
Disable Threshold
VDD = 2.7V to 3.3V
VIH
Enable Threshold
VDD = 2.7V to 3.3V
1.6
ROUT
Shutdown Output Impedance
EN = 0V DC
3.6
-65
mA
mA
+3
µA
0.8
V
V
4.5
5.9
kΩ
EN = 0V, f = 4.5MHz
3.4
kΩ
AC PERFORMANCE
BW
±0.1dB Bandwidth
RL = 150Ω, CL = 5pF
4
MHz
BW
-3dB Bandwidth
RL = 150Ω, CL = 5pF
8
MHz
Normalized Stopband Gain
f = 27MHz
-24.2
dB
Differential Gain
NTSC & PAL DC coupled
0.10
%
NTSC & PAL AC coupled
0.84
%
NTSC & PAL DC coupled
0.05
°
NTSC & PAL AC coupled
0.62
°
dG
dP
Differential Phase
D/DT
Group Delay Variation
f = 100kHz, 5MHz
5.4
ns
SNR
Signal To Noise Ratio
100% white signal
65
dB
TON
Enable Time
VIN = 500mV, VOUT to 1%
200
ns
2
FN6104.1
August 8, 2005
ISL59110
Electrical Specifications
DESCRIPTION
VS+ = 3.3V, TA = 25°C, RL = 150Ω to GND, CL = 0.1µF, unless otherwise specified. (Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
TOFF
Disable Time
VIN = 500mV, VOUT to 1%
14
ns
+SR
Positive Slew Rate
10% to 90%, VIN = 1V step
20
41
70
V/µs
-SR
Negative Slew Rate
90% to 10%, VIN = 1V step
-20
-30
-70
V/µs
tF
Fall Time
2.5VSTEP, 80% - 20%
25
ns
tR
Rise Time
2.5VSTEP, 20% - 80%
22
ns
Typical Performance Curves
NORMALIZED GAIN (dB)
0.5
VDD=+3.3V
RL=150Ω
0.3 CL=5pF
-0.1dB BW
@ 4MHz
0.1
-0.1
-0.3
-0.5
100K
1M
10M
FREQUENCY (Hz)
FIGURE 1. GAIN vs FREQUENCY -0.1dB
FIGURE 2. GAIN vs FREQUENCY -3dB POINT
FIGURE 3. GAIN vs FREQUENCY -3dB
FIGURE 4. GAIN vs FREQUENCY FOR VARIOUS RLOAD
3
FN6104.1
August 8, 2005
ISL59110
Typical Performance Curves
FIGURE 5. GAIN vs FREQUENCY FOR VARIOUS CLOAD
FIGURE 7. PHASE vs FREQUENCY
OUTPUT IMPEDANCE (Ω)
100
FIGURE 6. MAXIMUM OUTPUT MAGNITUDE vs INPUT
MAGNITUDE
FIGURE 8. PSRR vs FREQUENCY
VDD=+3.3V
10
1
0.1
0.01
10K
100K
1M
10M
100M
FREQUENCY (Hz)
FIGURE 9. OUTPUT IMPEDANCE vs FREQUENCY
4
FIGURE 10. ISOLATION vs FREQUENCY
FN6104.1
August 8, 2005
ISL59110
Typical Performance Curves
FIGURE 11. MAXIMUM OUTPUT vs LOAD RESISTANCE
FIGURE 12. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 13. LARGE SIGNAL STEP RESPONSE
FIGURE 14. SMALL SIGNAL STEP RESPONSE
FIGURE 15. ENABLE TIME
FIGURE 16. DISABLE TIME
5
FN6104.1
August 8, 2005
ISL59110
Typical Performance Curves
FIGURE 17. HARMONIC DISTORTION vs FREQUENCY
FIGURE 18. HARMONIC DISTORTION vs OUTPUT VOLTAGE
FIGURE 19. GROUP DELAY VERSUS FREQUENCY
FIGURE 20. -3dB BANDWIDTH VERSUS INPUT RESISTANCE
FIGURE 21. SLEW RATE vs SUPPLY VOLTAGE
6
FN6104.1
August 8, 2005
ISL59110
Typical Performance Curves
450mW
0.4
0.2
0.15
0.1
0.4
0.35
A
0.3
0.25
SC
=2 7 0 20 6
°C
/W
θJ
JA
500mW
0.45
-6 W
70 °C/
SC 00
=2
θ
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0.05
0
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0.5
0.45
POWER DISSIPATION (W)
0.55
POWER DISSIPATION (W)
0.5
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 22. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 23. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
SYNC CLAMP
VDD
VDD
VDD
SALLEN KEY LOW PASS FILTER
C2
+
CIN
R1
IN
R2
R3
VDC
+
–
IN
RIN
100nF
C1
SAG
NETWORK
+
-
C3
OUT
C5
47uF
R6
R7 SAG
R5
AC COUPLING
CAPACITOR
C4
ROUT
75Ω
RL
75Ω
22uF
EN
EN=GND: SHUTDOWN IDD~0
EN=VDD: ACTIVE IDD~1.5mA
GND
R4
FIGURE 24. BLOCK DIAGRAM
Application Information
The ISL59110 is a single supply rail-to-rail output amplifier
achieving a -3dB bandwidth of around 8MHz and slew rate
of about 40V/µs while demanding only 2mA of supply
current. This part is ideally suited for applications with
specific micropower consumption and high bandwidth
demands. As the performance characteristics above and the
features described below, the ISL59110 is designed to be
very attractive for portable composite video applications.
7
The ISL59110 features a sync clamp, low pass function, and
SAG network at the output facilitating reduction of typically
large AC coupling capacitors. See Figure 24.
Internal Sync Clamp
The typical embedded video DAC operates from a ground
referenced single supply. This becomes an issue because
the lower level of the sync pulse output may be at a 0V
reference level to some positive level. The problem is
presenting a 0V input to most single supply driven amplifiers
will saturate the output stage of the amplifier resulting in a
FN6104.1
August 8, 2005
ISL59110
clipped sync tip and degrading the video image. A larger
positive reference may offset the input above its positive
range.
The ISL59110 features an internal sync clamp and offset
function to level shift the entire video signal to the best level
before it reaches the input of the amplifier stage. These
features are also helpful to avoid saturation of the output
stage of the amplifier by setting the signal closer to the best
voltage range.
The simplified block diagram of the ISL59110 in Figure 24 is
divided into four sections. The first, Section A is the Sync
Clamp. The AC coupled video sync signal is pulled negative
by a current source at the input of the comparator amplifier.
When the sync tip goes below the comparator threshold the
output comparator is driven negative, The PMOS device
turns on clamping sync tip to near ground level. The network
triggers on the sync tip of video signal.
The Sallen Key Low Pass Filter
The Sallen Key in a classic low pass configuration illustrated
in Figure 24. This provides a very stable low pass function,
and in the case of the ISL59110, a three-pole roll-off at
around 8MHz. The three-pole function is accomplished with
an RC low pass network placed in series with and before the
Sallen Key. One pole provided by the RC network and poles
two and three provided by the Sallen Key for a nice threepole roll-off at around 8MHz. If more aggressive, multiplepole roll-offs are needed, multiple ISL59110 can be placed in
series. There will, of course, be a loss of bandwidth as
additional devices are added.
Typically this is accomplished with 220µF coupling capacitor,
a large and somewhat costly solution providing a low
frequency pole around 5Hz. If the size of this capacitor is
even slightly reduced we have found that the accompanying
phase shift in the 50Hz to 100Hz frequency range results in
field tilt resulting in a degraded video image.
The internal SAG network of the ISL59110 replaces the
220µF AC coupling capacitor with a network of two smaller
capacitors as shown in Figure 25. Additionally, the network is
designed to place a zero in the ~30Hz range, providing a
small amount of peaking to compensate the phase response
associated with field tilt.
DC Output Coupling
The ISL59110 internal sync clamp makes it possible to DC
couple the output to a video load, eliminating the need for
any AC coupling capacitors, saving board space and
additional expense for capacitors making the ISL59110 is
designed to be extremely attractive for portable video
applications Additionally, this solution completely eliminates
the issue of field tilt in the lower frequency. The trade off is
greater demand of supply current. Typical load current for
AC coupled is around 3mA compared to typical 6mA used
when DC coupling.
+
-
ENABLE
ROUT
TELEVISION
OR VCR
AC Output Coupling and the SAG Network
Composite video signals carry viable information at
frequencies as low as 30Hz up to 5MHz. When a video
system output is AC coupled it is critical that the filter
represented by the output coupling capacitor and the
surrounding resistance network provide a band pass
function with a low pass band low enough to exclude very
low frequencies down to DC, and with a high pass band pass
sufficiently high to include frequencies at the higher end of
the video spectrum.
SAG
NETWORK
AC COUPLING
CAPACITOR
C5
R6
R7
FIGURE 26. DC COUPLE
C4
ROUT
RL
R5
R4
FIGURE 25. SAG NETWORK AND AC COUPLING CAPACITORS
8
FN6104.1
August 8, 2005
ISL59110
Output Drive Capability
Where:
The ISL59110 does not have internal short circuit protection
circuitry. If the output is shorted indefinitely, the power
dissipation could easily overheat the die or the current could
eventually compromise metal integrity. Maximum reliability is
maintained if the output current never exceeds ±40mA. This
limit is set by the design of the internal metal interconnect.
Note that in transient applications, the part is robust.
Short circuit protection can be provided externally with a
back match resistor in series with the output placed close as
possible to the output pin. In video applications this would be
a 75Ω resistor and will provide adequate short circuit
protection to the device. Care should still be taken not to
stress the device with a short at the output.
Power Dissipation
With the high output drive capability of the ISL59110, it is
possible to exceed the 125°C absolute maximum junction
temperature under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for an application to determine if load conditions
or package types need to be modified to assure operation of
the amplifier in a safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
T JMAX – T AMAX
PD MAX = --------------------------------------------Θ JA
VS = Supply voltage
ISMAX = Maximum quiescent supply current
VOUT = Maximum output voltage of the application
RLOAD = Load resistance tied to ground
ILOAD = Load current
By setting the two PDMAX equations equal to each other, we
can solve the output current and RLOAD to avoid the device
overheat.
Power Supply Bypassing Printed Circuit Board
Layout
As with any modern operational amplifier, a good printed
circuit board layout is necessary for optimum performance.
Lead lengths should be as short as possible. The power
supply pin must be well bypassed to reduce the risk of
oscillation. For normal single supply operation, a single
4.7µF tantalum capacitor in parallel with a 0.1µF ceramic
capacitor from VS+ to GND will suffice.
Printed Circuit Board Layout
For good AC performance, parasitic capacitance should be
kept to minimum. Use of wire wound resistors should be
avoided because of their additional series inductance. Use
of sockets should also be avoided if possible. Sockets add
parasitic inductance and capacitance that can result in
compromised performance.
Where:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
ΘJA = Thermal resistance of the package
The maximum power dissipation actually produced by an IC
is the total quiescent supply current times the total power
supply voltage, plus the power in the IC due to the load, or:
for sourcing:
V OUT
PD MAX = V S × I SMAX + ( V S – V OUT ) × ---------------R
L
for sinking:
PD MAX = V S × I SMAX + ( V OUT – V S ) × I LOAD
9
FN6104.1
August 8, 2005
ISL59110
Small Outline Transistor Plastic Packages (SC70-6)
0.20 (0.008) M
P6.049A
VIEW C
C
6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE
CL
INCHES
e
b
SYMBOL
6
5
4
CL
CL
E1
E
1
2
3
e1
C
D
CL
SEATING
PLANE
A1
-C-
WITH
b
PLATING
b1
c
MAX
NOTES
0.031
0.039
0.80
1.00
-
0.001
0.004
0.025
0.10
-
A2
0.034
0.036
0.85
0.90
-
b
0.006
0.012
0.15
0.30
-
b1
0.006
0.010
0.15
0.25
-
c
0.004
0.008
0.10
0.20
6
c1
0.004
0.006
0.10
0.15
6
D
0.073
0.085
1.85
2.15
3
0.084 BSC
0.045
0.053
2.1 BSC
1.15
-
1.35
3
e
0.0256 Ref
0.65 Ref
-
e1
0.0512 Ref
1.30 Ref
-
L
0.10 (0.004) C
MIN
A
E
A2
MILLIMETERS
MAX
A1
E1
A
MIN
0.010
0.018
0.26
0.46
4
L1
0.016 Ref.
0.400 Ref.
-
L2
0.006 BSC
0.15 BSC
-
N
6
6
5
R
0.004
-
0.10
-
-
α
0°
8°
0°
8°
-
c1
Rev. 0 7/05
NOTES:
1. Dimensioning and tolerance per ASME Y14.5M-1994.
BASE METAL
2. Package conforms to EIAJ SC70 and JEDEC MO203AB.
3. Dimensions D and E1 are exclusive of mold flash, protrusions,
or gate burrs.
4X θ1
4. Footlength L measured at reference to gauge plane.
R1
5. “N” is the number of terminal positions.
6. These Dimensions apply to the flat section of the lead between
0.08mm and 0.15mm from the lead tip.
R
GAUGE PLANE
SEATING
PLANE
L
C
L1
α
7. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only
L2
4X θ1
VIEW C
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Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
10
FN6104.1
August 8, 2005