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LTC2440IGN#PBF

Description
IC adc differ 24-bit HS 16-ssop
CategoryAnalog mixed-signal IC    converter   
File Size354KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC2440IGN#PBF Overview

IC adc differ 24-bit HS 16-ssop

LTC2440IGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP16,.25
Contacts16
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Maximum analog input voltage2.5 V
Minimum analog input voltage-2.5 V
Maximum conversion time170000 µs
Converter typeADC, DELTA-SIGMA
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length4.8895 mm
Maximum linear error (EL)0.0015%
Humidity sensitivity level1
Number of analog input channels1
Number of digits24
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Output bit codeBINARY
Output formatSERIAL
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
power supply5 V
Certification statusNot Qualified
Sampling rate0.35 MHz
Maximum seat height1.75 mm
Nominal supply voltage5 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.899 mm
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
LTC2440
24-Bit High Speed
Differential
Δ∑
ADC with
Selectable Speed/Resolution
DESCRIPTION
The LTC
®
2440 is a high speed 24-bit No Latency Δ∑
TM
ADC with 5ppm INL and 5μV offset. It uses proprietary
delta-sigma architecture enabling variable speed and reso-
lution with no latency. Ten speed/resolution combinations
(6.9Hz/200nV
RMS
to 3.5kHz/25μV
RMS
) are programmed
through a simple serial interface. Alternatively, by tying a
single pin HIGH or LOW, a fast (880Hz/2μV
RMS
) or ultralow
noise (6.9Hz, 200nV
RMS
, 50/60Hz rejection) speed/reso-
lution combination can be easily selected. The accuracy
(offset, full-scale, linearity, drift) and power dissipation
are independent of the speed selected. Since there is no
latency, a speed/resolution change may be made between
conversions with no degradation in performance.
Following each conversion cycle, the LTC2440 automati-
cally enters a low power sleep state. Power dissipation
may be reduced by increasing the duration of this sleep
state. For example, running at the 3.5kHz conversion speed
but reading data at a 100Hz rate draws 240μA average
current (1.1mW) while reading data at a 7Hz output rate
draws only 25μA (125μW).The LTC2440 communicates
through a flexible 3-wire or 4-wire digital interface that is
compatible with the LTC2410 and is available in a narrow
16-lead SSOP package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No Latency Δ∑ is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
Up to 3.5kHz Output Rate
Selectable Speed/Resolution
2μV
RMS
Noise at 880Hz Output Rate
200nV
RMS
Noise at 6.9Hz Output Rate with
Simultaneous 50/60Hz Rejection
0.0005% INL, No Missing Codes
Autosleep Enables 20μA Operation at 6.9Hz
<5μV Offset (4.5V < V
CC
< 5.5V, –40°C to 85°C)
Differential Input and Differential Reference with
GND to V
CC
Common Mode Range
No Latency, Each Conversion is Accurate Even After
an Input Step
Internal Oscillator—No External Components
Pin Compatible with the LTC2410
24-Bit ADC in Narrow 16-Lead SSOP Package
APPLICATIONS
n
n
n
n
n
High Speed Multiplexing
Weight Scales
Auto Ranging 6-Digit DVMs
Direct Temperature Measurement
High Speed Data Acquisition
TYPICAL APPLICATION
Simple 24-Bit 2-Speed Acquisition System
4.5V TO 5.5V
Speed vs RMS Noise
100
V
CC
= 5V
V
REF
= 5V
V
IN+
= V
IN–
= 0V
V
CC
REFERENCE VOLTAGE
0.1V TO V
CC
ANALOG INPUT
–0.5V
REF
TO 0.5V
REF
BUSY
LTC2440
f
O
REF
+
4
REF
IN
+
IN
RMS NOISE (μV)
10
2μV AT 880Hz
200nV AT 6.9Hz
1 (50/60Hz REJECTION)
SCK
SDO
CS
SDI
3-WIRE
SPI INTERFACE
V
CC
6.9Hz, 200nV NOISE,
50/60Hz REJECTION
10-SPEED SERIAL
PROGRAMMABLE
880Hz OUTPUT RATE,
2μV NOISE
2440 TA01
GND
EXT
2440 TA01
0.1
1
1000
10
100
CONVERSION RATE (Hz)
10000
2440 TA02
2440fd
1

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