ISL28127_12 Datasheet, PDF (27/44 Pages) Intersil Corporation – Providing high-performance solutions for every link in the signal chain

► 24-bit Delta-Sigma
Industry-Leading
Noise Performance
Up to 4000SPS
with Full Firmware
Programmability
Key Features
• Best-in-Class Performance
• Lowest Noise over 2.5SPS-4000SPS
• Low Noise PGA with Buffer
-- Just 5.6nV/√Hz at 1Hz
• Simultaneous 50/60 Hz Noise Rejection
• 2 & 4 Ch Differential Input Multiplexer
-- AVDD Monitor, Onboard Temperature Sensor
• Low Power
-- 5V Analog, 5.5V / 2.7V Digital Supplies
-- 50mW power dissipation, 1µA Shutdown mode
-- Low Side Power Switch manages Load Cell Power
• SPI Compatible Serial Interface
-- Access to Calibration Registers
• 24 / 28 Pin TSSOP Package
• Extended Industrial Temp Range (-40ºC - 105ºC)
• Robust ESD Rating - 8kV HBM
24-bit ADCs: ISL26102, ISL26104
Low Noise
100000
10000
1000
100
10
0.1
1
10
100
Frequency (Hz)
Noise Spectral Density, 80SPS, PGA Gain = 1
Highly Integrated
AVDD
CAP
On-Chip
Temp Sensor
DVDD DVDD
Internal Clock
External
Oscillator
XTALIN/
CLOCK
XTALOUT
AIN1+
AIN1-
AIN2+
AIN2-
AIN3+
ISL26104 ^AIN3-
Only AIN4+
AIN4-
Input
Multiplexer
PGA
1, 2, 4, 8,16,
32, 64, 128
CS
ΔΣ
SDO/RDY
ADC
SDI
SCLK
LSPS
AGND
ISL26102, ISL26104
CAP DGND VREF+ DGND DGND
DGND
VREF-
PWDN
Evalboard
Available!
Easy to Use ADC
with Excellent Noise
Performance at
Low Cost
Key Features
• Drop-In Compatible with ADS1232/34
-- Improved Performance with no change in
circuitry
• 10SPS, 80SPS Operation
• Best in Class Performance – 21.6 Bits noise-free
(Gain = 1)
• Low Noise PGA with Buffer
• Simultaneous 50/60 Hz Noise Rejection
• 2 & 4 Channel, Differential-input Multiplexer
• All Functions Pin-programmed
• Low Power: 53mW (max), 1µA in Shutdown mode
-- 5V Analog, 5.5V / 2.7V Digital Supplies
• Easy-to-Use SPI-compatible Serial Interface
• 24 / 28 Pin TSSOP Package
• Extended Industrial Temp Range (-40ºC - 105ºC)
• Robust ESD Rating – 7.5kV HBM
• Samples and Evaluation Board available
24-bit ADCs: ISL26132, ISL26134
Low Noise
• At 10SPS, 128x Gain ISL26134 noise is 5.6nV/√Hz
• Competitor A shows 10.2nV/√Hz
1000
1000
100
100
10
10
1
1
0.10.1
1
10
Frequency (Hz)
ISL26134 128X Gain
100
0.10.1
1
10
100
Frequency (Hz)
Competitor A 128X Gain
Highly Integrated
AVDD
CAP
DVDD
ISL26132, ISL26134
ISL26134
Only
AIN1+
AIN1-
AIN2+
AIN2-
AIN3+
AIN3-
AIN4+
AIN4-
INPUT
MUX
PGA
1x/2x/64x/
128x
INTERNAL EXTERNAL
CLOCK OSCILLATOR
XTALIN/CLOCK
XTALOUT
SDO/RDY
∆∑
ADC
SCLK
PWDN
SPEED
A0
AGND GAIN1 CAP DGND VREF+ VREF- DGND
A1/TEMP GAIN0
DGND
Intersil Signal Path Products  2012  www.intersil.com
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