12-bit, 125kSPS Low-power ADCs with Single-ended
and Differential Inputs and Multiple Input Channels
ISL26310, ISL26311, ISL26312,
ISL26313, ISL26314, ISL26315,
ISL26319
The ISL26310/11/12/13/14/15/19 family of sampling
SAR-type ADCs feature excellent linearity over supply and
temperature variations, and offer versions with 1-, 2-, 4- and
8-channel single-ended inputs, and 1-, 2- and 4-channel
differential inputs.
A proprietary input multiplexer and combination buffer amplifier
reduces the input drive requirements, resulting in lower cost and
reduced board space. Specified measurement accuracy is
maintained with input signals up to VDD.
Members of the ISL26310/11/12/13/14/15/19 family of
Low-Power ADCs offer pinout intercompatibility, differing only in
the analog inputs, to support quick replication of proven layouts
across multiple design platforms.
The serial digital interface is SPI compatible and is easily
interfaced to popular FPGAs and microcontrollers. Power
consumption is limited to 11mW at a sampling rate of 125kSPS,
and an operating current of just 8µA typical between
conversions, when configured for Auto Powerdown mode.
The ISL26310/11/12/13/14/15/19 feature up to 5kV Human
Body Model ESD survivability and are available in the popular
SOIC and TSSOP packages. Performance is specified for
operation over the full industrial temperature range (-40°C to
+125°C).
Features
• Pin-compatible Family Allows Easy Design Upgrades
• Excellent Differential Non-Linearity (0.7LSB max)
• Low THD: -86dB (typ)
• Simple SPI-compatible Serial Digital Interface
• Low 2.2mA Operating Current
• Power-down Current between Conversions 8µA (typ)
• +5.25V to +2.7V Supply
• Excellent ESD Survivability: 5kV HBM, 350V MM, 2kV CDM
Applications
• Industrial Process Control
• Energy Measurement
• Multichannel Data Acquisition Systems
• Pressure Sensors
• Flow Controllers
VDD
VREF
BUFFER
ANALOG INPUTS
DIFFERENTIAL/
SINGLE-ENDED
MUX
ADC
SPI
CNV
SCLK
SDO
SDI
OSC
POR
GND
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM
July 3, 2012
FN7549.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319
Application Block Diagram
ANALOG SIGNAL INPUT MODULES
Pressure/Strain Gage Sensor
V-REF
Precision
Amp
RS-485
M
U
X
ADC
µC
RTC
DCP
Gain
Amplifier
+V
Precision
Amp
Active
Filter
+V
Precision
Amp
-V
-V
MUX and ADC
POWER
V-REF
Temperature Sensor
Gain
Amplifier
+V
Precision
Amp
Voltage
Monitors &
Watchdog
Active
Filter
+V
Precision
Amp
DCP
LDOs
System
Power
Switching
Regulators
Core &
I/O Power
RTD
ISO-Thermal
Block
Thermal
Couple
-V
-V
SW
Controller
Isolated
Power
Flow Sensor
Loop Supply
Gain
Amplifier
+V
Iout
4-20mA
Vin
Precision
Amp
Differential
Pressure
Transducer
W/ sqrt
Extractor
Active
Filter
+V
Precision
Amp
-V
-V
Pin-Compatible Family
MODEL
ISL26310
ISL26311
ISL26312
ISL26313
ISL26314
ISL26315
ISL26319
ISL26320
ISL26321
ISL26322
ISL26323
ISL26324
ISL26325
ISL26329
RESOLUTION
(Bits)
12
12
12
12
12
12
12
12
12
12
12
12
12
12
SPEED
(kHz)
125
125
125
125
125
125
125
250
250
250
250
250
250
250
ANALOG
INPUT
Differential
Single-Ended
Differential
Single-Ended
Differential
Single-Ended
Single-Ended
Differential
Single-Ended
Differential
Single-Ended
Differential
Single-Ended
Single-Ended
INPUT
CHANNELS
1
1
2
2
4
4
8
1
1
2
2
4
4
8
2
FN7549.1
July 3, 2012
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319
Ordering Information
DESCRIPTION
PART NUMBER
(Notes 1, 2, 3)
ISL26310FBZ
ISL26311FBZ
ISL26312FVZ
ISL26313FBZ
ISL26314FVZ
ISL26315FVZ
ISL26319FVZ
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to
TB347
for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315,
ISL26319.
For more information on MSL please see techbrief
TB363.
PART
MARKING
26310 FBZ
26311 FBZ
26312 FVZ
26313 FBZ
26314 FVZ
26315 FVZ
26319 FVZ
RESOLUTION
(Bits)
12
12
12
12
12
12
12
SPEED
(kHz)
125
125
125
125
125
125
125
INPUT
(SE/DIFF)
Diff
SE
Diff
SE
Diff
SE
SE
INPUT
CHANNELS
1
1
2
2
4
4
8
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
PACKAGE
(Pb-Free)
8 Ld SOIC
8 Ld SOIC
16 Ld TSSOP
8 Ld SOIC
16 Ld TSSOP
16 Ld TSSOP
16 Ld TSSOP
PKG
DWG #
M8.15
M8.15
M16.173
M8.15
M16.173
M16.173
M16.173
3
FN7549.1
July 3, 2012
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319
Pin Configurations
ISL26310
(8 LD SOIC)
TOP VIEW
VDD
GND
AIN+
AIN-
1
2
3
4
8
7
6
5
CNV
SCLK
SDO
SDI
ISL26311
(8 LD SOIC)
TOP VIEW
VDD
GND
VREF
AIN0
1
2
3
4
8
7
6
5
CNV
SCLK
SDO
SDI
ISL26313
(8 LD SOIC)
TOP VIEW
VDD
GND
AIN0
AIN1
1
2
3
4
8
7
6
5
CNV
SCLK
SDO
SDI
ISL26312
(16 LD TSSOP)
TOP VIEW
VDD
GND
V R EF
GND
A IN0+
A IN 0-
A IN 1+
A IN 1-
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CNV
S C LK
SDO
SDI
NC
NC
NC
NC
VDD
GND
VREF
GND
AIN0+
AIN0-
AIN1+
AIN1-
1
2
3
4
5
6
7
8
ISL26314
(16 LD TSSOP)
TOP VIEW
16
15
14
13
12
11
10
9
CNV
SCLK
SDO
SDI
AIN3+
AIN3-
AIN2+
AIN2-
ISL26315
(16 LD TSSOP)
TOP VIEW
VDD
G ND
VREF
G ND
AIN0
NC
AIN1
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CNV
SCLK
SDO
SDI
AIN3
NC
AIN2
NC
VDD
GND
VREF
GND
AIN0
AIN1
AIN2
AIN3
1
2
3
4
5
6
7
8
ISL26319
(16 LD TSSOP)
TOP VIEW
16
15
14
13
12
11
10
9
CNV
SCLK
SDO
SDI
AIN7
AIN6
AIN5
AIN4
4
FN7549.1
July 3, 2012
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319
Pin Descriptions
PIN NUMBER
PIN NAME ISL26310 ISL26311
VDD
GND
VREF
AIN0+
AIN0-
AIN1+
AIN1-
AIN2+
AIN2-
AIN3+
AIN3-
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
SDI
SDO
SCLK
CNV
NC
AIN+
AIN-
1
2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5
6
7
8
-
3
4
1
2
3
-
-
-
-
-
-
-
-
4
-
-
-
-
-
-
-
5
6
7
8
-
-
-
ISL26312
1
2, 4
3
5
6
7
8
-
-
-
-
-
-
-
-
-
-
-
-
13
14
15
16
9, 10, 11, 12
-
-
ISL26313 ISL26314 ISL26315 ISL26319
1
2
-
-
-
-
-
-
-
-
-
3
4
-
-
-
-
-
-
5
6
7
8
-
-
-
1
2, 4
3
5
6
7
8
10
9
12
11
-
-
-
-
-
-
-
-
13
14
15
16
-
-
-
1
2, 4
3
-
-
-
-
-
-
-
-
5
7
10
12
-
-
-
-
13
14
15
16
6, 8, 9, 11
-
-
1
2, 4
3
-
-
-
-
-
-
-
-
5
6
7
8
9
10
11
12
13
14
15
16
-
-
-
DESCRIPTION
Positive Supply Voltage
Ground
Reference Voltage Input
Differential Analog Input, Positive
Differential Analog Input, Negative
Differential Analog Input, Positive
Differential Analog Input, Negative
Differential Analog Input, Positive
Differential Analog Input, Negative
Differential Analog Input, Positive
Differential Analog Input, Negative
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Single-Ended Analog Input
Serial Interface Data Input
Serial Interface Data Output
Serial Interface Clock Input
Conversion Control Input
No Connect
Differential Analog Input, Positive
Differential Analog Input, Negative
5
FN7549.1
July 3, 2012
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