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PDF ISL28476 Data sheet ( Hoja de datos )
| Número de pieza | ISL28476 | |
| Descripción | (ISL28276 / ISL28476) Quad Precision Micropower Single Supply Rail-to-Rail Input And Output Precision Op Amps | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
ISL28276, ISL28476
November 30, 2007
FN6301.3
Dual and Quad Micropower Single Supply
Rail-to-Rail Input and Output (RRIO)
Precision Op Amp
The ISL28276 and ISL28476 are dual and quad channel
micropower operational amplifiers optimized for single
supply operation over the 2.4V to 5V range. They can be
operated from one lithium cell or two Ni-Cd batteries. For
equivalent performance in a single channel op amp
reference EL8176.
These devices feature an Input Range Enhancement Circuit
(IREC) which enables them to maintain CMRR performance for
input voltages 10% above the positive supply rail and down to
the negative supply. The output operation is rail to rail.
The ISL28276 and ISL28476 draw minimal supply current
while meeting excellent DC-accuracy, AC-performance,
noise and output drive specifications. The ISL28276
contains a power down enable pin that reduces the power
supply current to typically 4µA in the disabled state.
Ordering Information
PART NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL28276FBZ* 28276 FBZ
8 Ld SOIC MDP0027
ISL28276IAZ*
28276 IAZ
16 Ld QSOP MDP0040
ISL28476FAZ* 28476 FAZ
16 Ld QSOP MDP0040
*Add “-T7” suffix for tape and reel. Please refer to TB347 for details
on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
Features
• Low power 120µA typical supply current (ISL28276)
• 100µV maximum offset voltage
• 500pA typical input bias current
• 400kHz typical gain-bandwidth product
• 115dB typical PSRR and CMRR
• Single supply operation down to 2.4V
• Input is capable of swinging above V+ and to V- (ground
sensing)
• Rail-to-rail input and output (RRIO)
• Pb-free (RoHS compliant)
Applications
• Battery- or solar-powered systems
• 4mA to 25mA current loops
• Handheld consumer products
• Medical devices
• Thermocouple amplifiers
• Photodiode pre-amps
• pH probe amplifiers
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, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
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ISL28276, ISL28476
Typical Performance Curves
+1
0 V+, V- = ±1.2V
-1
V+, V- = ±2.5V
RL = 1k
-2
RL = 1k
V+, V- = ±1.2V
RL = 10k
-3 V+, V- = ±2.5V
-4 RL = 10k
-5 VOUT = 50mVP-P
AV = 1
-6 CL = 3pF
-7 RF = 0/RG = INF
-8
1k
10k 100k
1M
FREQUENCY (Hz)
5M
FIGURE 1. FREQUENCY RESPONSE vs SUPPLY VOLTAGE
45
40
35
30
25 V+, V- = ±1.25V
20
AV = 100
15 RL = 10kΩ
V+, V- = ±2.5V
10
CL = 2.7pF
RF/RG = 99.02
5
RF = 221kΩ
RG = 2.23kΩ
V+, V- = ±1.0V
0
100 1k 10k 100k
1M
FREQUENCY (Hz)
FIGURE 2. FREQUENCY RESPONSE vs SUPPLY VOLTAGE
120 80
80 40
GAIN
40 0
0
PHASE
-40
-40
-80
-80
1
-120
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
FIGURE 3. AVOL vs FREQUENCY @ 100kΩ LOAD
100 200
80 150
PHASE
100
60
50
40
0
20
GAIN
-50
0 -100
-20
10
100 1k 10k 100k
FREQUENCY (Hz)
-150
1M
FIGURE 4. AVOL vs FREQUENCY @ 1kΩ LOAD
120
110
100
90
80
70
60
50 PSRR -
40
30
V+, V- = ±2.5V
VSOURCE = 1VP-P
20 RL = 100kΩ
10 AV = +1
0
10 100 1k
PSRR +
10k
FREQUENCY (Hz)
100k
FIGURE 5. PSRR vs FREQUENCY
1M
100
90
80
70
60
50
40
30
20
10
10
V+, V- = ±2.5V
VSOURCE = 1VP-P
RL = 100kΩ
AV = +1
100 1k
10k
FREQUENCY (Hz)
100k
FIGURE 6. CMRR vs FREQUENCY
5 FN6301.3
November 30, 2007
5 Page 
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ISL28276, ISL28476
Typical Performance Curves (Continued)
0.24
0.22
N = 1000
0.20
0.18
MAX
0.16
0.14
MEDIAN
MIN
0.12
0.10
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 37. - SLEW RATE vs TEMPERATURE, VOUT = ±1.5V, AV = +2
Pin Descriptions
ISL28276
ISL28276
ISL28476
(8 LD SOIC) (16 LD QSOP) (16 LD QSOP) PIN NAME EQUIVALENT CIRCUIT
DESCRIPTION
1
3
1 OUT_A
Circuit 3
Amplifier A output
2
4
2 IN-_A
Circuit 1
Amplifier A inverting input
3
5
3 IN+_A
Circuit 1
Amplifier A non-inverting input
8
15
4 V+
Circuit 4
Positive power supply
5
12
5 IN+_B
Circuit 1
Amplifier B non-inverting input
6
13
6 IN-_B
Circuit 1
Amplifier B inverting input
7
14
7 OUT_B
Circuit 3
Amplifier B output
1, 2, 8, 9, 10, 16
8, 9
NC
No internal connection
10 OUT_C
Circuit 3
Amplifier C output
11 IN-_C
Circuit 1
Amplifier C inverting input
12 IN+_C
Circuit 1
Amplifier B non-inverting input
4
7
13 V-
Circuit 4
Negative power supply
14 IN+_D
Circuit 1
Amplifier D non-inverting input
15 IN-_D
Circuit 1
Amplifier D inverting input
16 OUT_D
Circuit 3
Amplifier D output
6
EN_A
Circuit 2
Amplifier A enable pin internal pull-down; Logic “1”
selects the disabled state; Logic “0” selects the enabled
state.
11
EN_B
Circuit 2
Amplifier B enable pin with internal pull-down; Logic “1”
selects the disabled state; Logic “0” selects the enabled
state.
IN-
CIRCUIT 1
V+
IN+
V-
V+
LOGIC
PIN
V-
CIRCUIT 2
V+
OUT
V-
CIRCUIT 3
V+
CAPACITIVELY
COUPLED
ESD CLAMP
V-
CIRCUIT 4
11 FN6301.3
November 30, 2007
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ISL28476.PDF ] | |
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