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Renesas Electronics Components Datasheet

ISL2671286 Datasheet

20kSPS SAR ADC

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ISL2671286
12-Bit, 20kSPS SAR ADC
The ISL2671286 is a sampling SAR-type ADC which features
excellent linearity over supply and temperature variations, and
provides a drop-in compatible alternative to all ADS1286
performance grades. The robust high impedance input
minimizes errors due to leakage currents, and specified
measurement accuracy is maintained with input signals up to
the supply rails.
The reference accepts inputs between 1.25V to 5.0V, providing
design flexibility in a wide variety of applications. The
ISL2671286 also features up to 8kV Human Body Model ESD
survivability.
The serial digital interface is SPI compatible and is easily
interfaced to all popular FPGAs and microcontrollers.
Operating from a 5V supply, power dissipation is 1.4mW at a
sampling rate of 20kSPS and just 15µW between conversions
utilizing the Auto Power-Down mode. These features make the
ISL2671286 an excellent solution for remote industrial
sensors and battery-powered instruments.
The ISL2671286 is available in an 8 Ld SOIC package and is
specified for operation over the industrial temperature range
of –40°C to +85°C.
DATASHEET
FN7863
Rev 0.00
November 1, 2011
Features
• Drop-In Compatible with ADS1286 (All Performance Grades)
• Simple SPI-compatible Serial Digital Interface
• Guaranteed No Missing Codes
• 20kHz Sampling Rate
• +4.50V to +5.25V Supply
• Low 280µA Operating Current (20kSPS)
• Power-down Current between Conversions: 3µA
• Excellent Differential Non-Linearity (0.75LSB Max)
• Low THD: -83dB (Typ)
• Pb-Free (RoHS Compliant)
• Available in SOIC Package
Applications
• Remote Data Acquisition
• Battery Operated Systems
• Industrial Process Control
• Energy Measurement
• Data Acquisition Systems
• Pressure Sensors
• Flow Controllers
VREF
+VCC
+IN DCLOCK
SAR
LOGIC
SERIAL
INTERFACE
DOUT
IN CS/SHDN
VREF
GND
FIGURE 1. BLOCK DIAGRAM
3
2
1
0
-1
-2
-3
0
512 1024 1536 2048 2560 3072 3584
CODE
FIGURE 2. DIFFERENTIAL LINEARITY ERROR vs CODE
4096
FN7863 Rev 0.00
November 1, 2011
Page 1 of 15


Renesas Electronics Components Datasheet

ISL2671286 Datasheet

20kSPS SAR ADC

No Preview Available !

ISL2671286
Typical Connection Diagram
VREF
+5V SUPPLY
+ 0.1 F + 10 F
REFP-P
VREF
+IN
–IN
GND
+VCC
DCLOCK
DOUT
CS/SHDN
SERIAL
INTERFACE
P/ C
Pin Configuration
ISL2671286
(8 LD SOIC)
TOP VIEW
VREF 1
+IN 2
IN 3
GND 4
8 +VCC
7 DCLOCK
6 DOUT
5 CS/SHDN
Pin Descriptions
PIN NAME
VREF
+IN
–IN
GND
CS/SHDN
DOUT
DCLOCK
+VCC
PIN
NUMBER
DESCRIPTION
1 Reference input
2 Non-inverting input
3 Inverting input. Connect to ground or remote
sense point.
4 Ground
5 Chip select when low; shut-down mode when
high.
6 Serial output data word comprises 12 bits of
data. In operation, data is valid on falling
edge of DCLOCK. Second clock pulse after
falling edge of CS/SHDN enables serial
output. After one null bit, data is valid for
next 12 edges.
7 Data clock synchronizes serial data transfer.
8 Power supply
Ordering Information
PART NUMBER
(Notes 1, 2)
PART MARKING
+VCC RANGE
(V)
TEMP RANGE
(°C)
PACKAGE
PKG.
DWG. #
ISL2671286IBZ (Note 3)
2671286 IBZ
4.50 to 5.25
-40°C to +85°C
8 Ld SOIC
M8.15
Coming Soon
ISL2671286IPZ
2671286 IPZ
4.50 to 5.25
-40°C to +85°C
8 Ld PDIP
E8.3
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 ISL2671286. For more information on MSL please see Tech Brief TB363.
FN7863 Rev 0.00
November 1, 2011
Page 2 of 15


Part Number ISL2671286
Description 20kSPS SAR ADC
Maker Renesas
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