®
ISL55191, ISL55291
Data Sheet
December 15, 2006
FN6263.0
Single and Dual Ultra-Low Noise, Ultra-
Low Distortion, Rail-to-Rail, Low Power
Op Amp
The ISL55191 and ISL55291 are single and dual low noise,
low distortion, rail-to-rail and low power operational
amplifiers. They are fully specified for single-supply
operation down to +3V. These amplifiers draw 6.1mA of
quiescent supply current per amplifier. For power
conservation, this family offers a low-power shutdown mode
that reduces supply current to 21µA and places the
amplifiers' output into a high impedance state.
These amplifiers have outputs that swing rail-to-rail and their
input common mode voltage range extends slightly below
ground. The ISL55191 and ISL55291 are stable at gains as
low as 10 with an input referred voltage noise of 1nV/
√
Hz
and harmonic distortion products -94dBc (2nd) and -104dBc
(3rd) below a 1MHz 2V
PP
signal.
The ISL55291 is available in a 10 Ld MSOP package. The
ISL55191 will be available in space-saving 8 Ld DFN and
8 Ld SO packages.
Features
• 1nV/√Hz input voltage noise, f
O
= 1kHz
• Harmonic Distortion -94dBc, -104dBc, f
O
= 1MHz
• Stable at gains as low as 10
• 800MHz gain bandwidth product (A
V
= 10)
• 240V/µs slew rate
• 6.1mA supply current (21µA in disable mode)
• 580µV maximum offset voltage
• 11µA input bias current
• 3V to 5.5V single supply voltage range
• Rail-to-rail output
• Enable pin
• Pb-free plus anneal available (RoHS compliant)
Applications
• Low noise signal processing
• ADC buffers
• DAC output amplifiers
Ordering Information
PART NUMBER
PART
(Note)
MARKING
Coming Soon
ISL55191IBZ
Coming Soon
ISL55191IBZ-T7
Coming Soon
ISL55191IRZ
Coming Soon
ISL55191IRZ-T7
ISL55291IUZ
5291Z
TAPE &
REEL
-
7”
(1k pcs)
-
7”
(1k pcs)
-
PACKAGE
(Pb-free)
8 Ld SO
8 Ld SO
8 Ld DFN
8 Ld DFN
PKG.
DWG. #
MDP0027
MDP0027
L8.3X3D
L8.3X3D
• Radio systems
• Portable equipment
TABLE 1. ENABLE LOGIC
ENABLE
ISL55191
ISL55291
EN = 1
EN = 0
DISABLE
EN = 0
EN = 1
10 Ld MSOP MDP0043
ISL55291IUZ-T7 5291Z
7”
10 Ld MSOP MDP0043
(2500 pcs)
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
ISL55191, ISL55291
Pinouts
ISL55191
(8 LD SO)
COMING SOON
TOP VIEW
FEEDBACK 1
IN- 2
IN+ 3
V- 4
-
+
8 ENABLE
7 V+
6 OUT
5 NC
ISL55191
(8 LD DFN)
COMING SOON
TOP VIEW
ENABLE
FEEDBACK
IN-
IN+
1
2
3
4
-
+
8
7
6
5
V+
OUT
NC
V-
ISL55291
(10 LD MSOP)
TOP VIEW
OUT_A 1
IN-_A 2
IN+_A 3
V- 4
ENABLE_A 5
-
+
-
+
10 V+
9 OUT_B
8 IN-_B
7 IN+_B
6 ENABLE_B
2
FN6263.0
December 15, 2006
ISL55191, ISL55291
Absolute Maximum Ratings
(T
A
= +25°C)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/μs
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
ESD tolerance
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
Thermal Information
Thermal Resistance
θ
JA
(°C/W)
8 Ld DFN Package . . . . . . . . . . . . . . . . . . . . . . . . .
65.75
8 Ld SO Package . . . . . . . . . . . . . . . . . . . . . . . . . .
110
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .
115
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Ambient Operating Temperature Range . . . . . . . . . .-40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°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. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications
PARAMETER
V
OS
ΔV
OS
---------------
-
ΔT
I
OS
I
B
HD
(1MHz)
V
N
IN
V
CM
CMRR
PSRR
A
VOL
V
OUT
V+ = 5V, V- = GND, R
L
= 1kΩ
,
R
G
= 30Ω
,
R
F
= 270Ω
.
unless otherwise specified. Parameters are per amplifier.
Typical values are at V+ = 5V, T
A
= +25°C.
CONDITIONS
MIN
TYP
170
-40°C to +85°C
2.2
0.3
-12
2V
PP
output voltage, A
V
= 10
-94
-104
f
O
= 1kHz
f
O
= 10kHz
0
V
CM
= 0V to 3.8V
V+ = 3V to 5V
V
O
= 0.5V to 4V, R
L
= 1kΩ
Output low, R
L
= 1kΩ
Output high, R
L
= 1kΩ, V+ = 5V
4.96
150
A
V
= 10
C
L
= 20pF, A
V
= 10
ISL55191
ISL55291
85
70
85
100
77
97
23
4.98
240
800
130
6.1
12
21
R
L
= 10Ω
R
L
= 10Ω
V+ to V-
110
110
3
2
0.8
ISL55191 (EN)
ISL55291 (EN)
ISL55191 (EN)
ISL55291 (EN)
20
0.8
5
20
80
1.5
6.2
80
132
132
5
9
18
40
40
1.0
2.6
3.8
0.7
-19
MAX
800
UNIT
µV
µV/°C
µA
µA
dBc
dBc
nV/√Hz
pA/√Hz
V
dB
dB
dB
mV
V
V/µs
MHz
MHz
mA
mA
µA
mA
mA
V
V
V
nA
µA
µA
nA
DESCRIPTION
Input Offset Voltage
Input Offset Drift vs Temperature
Input Offset Current
Input Bias Current
2nd Harmonic Distortion
3rd Harmonic Distortion
Input Referred Voltage Noise
Input Referred Current Noise
Common-Mode Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Maximum Output Voltage Swing
SR
GBW
3dB BW
I
S,ON
Slew Rate
Gain Bandwidth Product
3dB Bandwidth
Supply Current, Enabled
I
S,OFF
I
O
+
I
O
-
V
SUPPLY
V
INH
V
INL
I
ENH
Supply Current, Disabled
Short-Circuit Output Current
Short-Circuit Output Current
Supply Operating Range
Enable Pin High Level
Enable Pin Low Level
ENABLE Input High Current
V
EN
= V+
ENABLE Input Low Current
V
EN
= V-
I
ENL
3
FN6263.0
December 15, 2006
ISL55191, ISL55291
Typical Performance Curves
1
0
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
-1
-2
-3
-4
-5
-6
A
V
= 10
-7 V
+
= 5V
C = 1.3pF
-8
L
V
OUT
= 100mV
PP
-9
10k
100k
1M
R
L
= 250
R
L
= 500
R
L
= 1000
10M
100M
1G
R
L
= 100
4
3
2
1
0
-1
-2
-3
A
V
= 10
-4
V
+
= 5V
R
L
= 1k
-5
V
OUT
= 100mV
PP
-6
100k
1M
C
L
= 1.2pF
C
L
= 2.2pF
C
L
= 4.5pF
C
L
= 23.2pF
C
L
= 13.2pF
C
L
= 8.0pF
10M
FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
FIGURE 1. GAIN vs FREQUENCY FOR VARIOUS R
LOAD
FIGURE 2. GAIN vs FREQUENCY FOR VARIOUS C
LOAD
65
A
V
= 1000 Rf/Ri = 100k/100
60
55
50
45
A
V
= 10 Rf/Ri = 909/100
40
35
30
A
V
= 100 Rf/Ri = 10k/100
25
20
15
R = 1k
10
L
C
L
= 2.2pF
5
V
OUT
= 100mV
PP
0
100k
1M
10M
100M
1G
FREQUENCY (Hz)
1
0
NORMALIZED GAIN (dB)
-1
-2
-3
-4
A
V
= 10
-5
V
+
= 5V
R
L
= 1k
-6
C
L
= 1.3pF
R
f
= 909
-7
R
g
= 100
-8
100k
1M
V
OUT
= 200mV
V
OUT
= 100mV
GAIN (dB)
V
OUT
= 1V
10M
FREQUENCY (Hz)
100M
1G
FIGURE 3. GAIN vs FREQUENCY vs CLOSED LOOP GAIN
FIGURE 4. GAIN vs FREQUENCY vs V
OUT
CMRR (dB)
PSRR (dB)
A
V
= 10
-10
C
g
= 0.8pF
R
L
= 1k
-20
R
g
= 100
-30
Rf = 909
V
PP
= 1V
-40
-50
-60
-70
-80
-90
-100
100k
1M
10M
100M
FREQUENCY (Hz)
1G
0
0
A = 10
-10
C
V
= 0.8pF
g
-20
R
L
= 1k
R
g
= 100
-30
Rf = 909
-40
V
PP
= 1V
-50
-60
-70
-80
-90
-100
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1G
PSRR-
PSRR+
FIGURE 5. CMRR vs FREQUENCY
FIGURE 6. PSRR vs FREQUENCY
4
FN6263.0
December 15, 2006
ISL55191, ISL55291
Typical Performance Curves
(Continued)
0.06
0.04
SMALL SIGNAL (V)
0.02
0
-0.02
-0.04
-0.06
0
V
+
= 5V
A
V
= 10
R
L
= 1k
C
L
= 1.3pF
V
OUT
= 100mV
PP
20
40
60
TIME (ns)
80
100
LARGE SIGNAL (V)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
V
+
= 5V
A
V
= 10
R
L
= 1k
C
L
= 1.3pF
V
OUT
= 100mV
PP
0
20
40
60
80
100
TIME (ns)
FIGURE 7. SMALL SIGNAL STEP RESPONSE
FIGURE 8. LARGE SIGNAL STEP RESPONSE
24
22
20
CURRENT (mA)
18
16
14
33
n = 100
MAX
MEDIAN
CURRENT (µA)
31
29
27
25
23
21
19
17
15
-20
0
20
40
60
80
TEMPERATURE (°C)
100
120
13
-40
-20
0
20
40
60
80
100
120
MIN
MEDIAN
n = 100
MAX
MIN
12
10
8
-40
TEMPERATURE (°C)
FIGURE 9. SUPPLY CURRENT ENABLED vs TEMPERATURE
V
S
= ±2.5V
FIGURE 10. SUPPLY CURRENT DISABLED vs
TEMPERATURE V
S
= ±2.5V
17.5
16.5
15.5
CURRENT (mA)
14.5
13.5
12.5
11.5
10.5
9.5
8.5
-40
-20
0
20
40
60
80
100
120
MIN
MEDIAN
CURRENT(µA)
n = 100
MAX
15
14
13
12
11
10
9
8
7
6
-40
-20
0
20
40
60
80
100
120
MIN
MEDIAN
n = 100
MAX
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 11. SUPPLY CURRENT ENABLED vs TEMPERATURE
V
S
= ±1.5V
FIGURE 12. SUPPLY CURRENT DISABLED vs TEMPERATURE
V
S
= ±1.5V
5
FN6263.0
December 15, 2006
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