LTC2413
24-Bit No Latency
∆Σ™
ADC,
with Simultaneous 50Hz/60Hz Rejection
FeaTures
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DescripTion
The
LTC
®
2413
is a 2.7V to 5.5V simultaneous 50Hz/60Hz
rejection micropower 24-bit differential ∆Σ analog to
digital converter with an integrated oscillator, 2ppm INL
and 0.16ppm RMS noise. It uses delta-sigma technology
and provides single cycle settling time for multiplexed
applications. Through a single pin, the LTC2413 can be
configured for better than 87dB input differential mode
rejection over the range of 49Hz to 61.2Hz (50Hz and
60Hz ± 2% simultaneously), or it can be driven by an
external oscillator for a user defined rejection frequency.
The internal oscillator requires no external frequency
setting components.
The converter accepts any external differential reference
voltage from 0.1V to V
CC
for flexible ratiometric and re-
mote sensing measurement configurations. The full-scale
differential input range is from –0.5V
REF
to 0.5V
REF
. The
reference common mode voltage, V
REFCM
, and the input
common mode voltage, V
INCM
, may be independently set
anywhere within the GND to V
CC
range of the LTC2413. The
DC common mode input rejection is better than 140dB.
The LTC2413 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRE protocols.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No
Latency ∆∑ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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Simultaneous 50Hz/60Hz Rejection
(87dB Minimum)
Differential Input and Differential Reference with
GND to V
CC
Common Mode Range
2ppm INL and No Missing Codes at 24 Bits
0.1ppm Offset and 2.5ppm Full-Scale Error
0.16ppm Noise
No Latency: Digital Filter Settles in a Single Cycle
Internal Oscillator—No External Components
Required
24-Bit ADC in Narrow SSOP-16 Package
(SO-8 Footprint)
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200µA) and Auto Shutdown
Pin Compatible with LTC2410
applicaTions
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Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
6-Digit DVMs
Products for International Markets
Typical applicaTion
2.7V TO 5.5V
2
14
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/
SIMULTANEOUS 50Hz/60Hz REJECTION
1µF
V
CC
LTC2413
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG INPUT RANGE
–0.5V
REF
TO 0.5V
REF
3
4
5
6
REF
+
REF
–
IN
+
IN
–
Measured Noise Rejection from 48Hz to 62.5Hz
–80
–85
NORMAL MODE REECTION (dB)
MEASURED DATA
CALCULATED DATA
V
CC
= 5V
REF
+
= 5V
REF
–
= GND
V
INCM
= 2.5V
V
IN(P-P)
= 5V
T
A
= 25°C
F
O
–90
–95
–100
–105
–110
–115
SCK
13
3-WIRE
SPI INTERFACE
SDO
CS
12
11
1, 7, 8, 9, 10, 15, 16
GND
2413 TA01
–120
48
50
52
54
56
58
60
INPUT FREQUENCY (Hz)
62
2413 TA02
2413fa
For more information
www.linear.com/LTC2413
1
LTC2413
absoluTe MaxiMuM raTings
(Notes 1, 2)
pin conFiguraTion
TOP VIEW
GND
V
CC
REF
+
REF
–
IN
+
IN
–
GND
GND
1
2
3
4
5
6
7
8
16 GND
15 GND
14 F
O
13 SCK
12 SDO
11
CS
10 GND
9
GND
Supply Voltage (V
CC
) to GND .......................– 0.3V to 7V
Analog Input Pins Voltage
to GND ......................................–0.3V to (V
CC
+ 0.3V)
Reference Input Pins Voltage
to GND ......................................–0.3V to (V
CC
+ 0.3V)
Digital Input Voltage to GND .........–0.3V to (V
CC
+ 0.3V)
Digital Output Voltage to GND.......–0.3V to (V
CC
+ 0.3V)
Operating Temperature Range
LTC2413C ................................................ 0°C to 70°C
LTC2413I .............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 95°C/W
orDer inForMaTion
LEAD FREE FINISH
LTC2413CGN#PBF
LTC2413IGN#PBF
TAPE AND REEL
LTC2413CGN#TRPBF
LTC2413IGN#TRPBF
PART MARKING
2413
2413I
PACKAGE DESCRIPTION
16-Lead Plastic SSOP
16-Lead Plastic SSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2
2413fa
For more information
www.linear.com/LTC2413
LTC2413
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
PARAMETER
Integral Nonlinearity
CONDITIONS
l
l
l
elecTrical characTerisTics
MIN
24
TYP
1
2
5
0.5
10
MAX
UNITS
Bits
ppm of V
REF
ppm of V
REF
ppm of V
REF
µV
nV/°C
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, –0.5 •
V
REF
≤ V
IN
≤ 0.5 •
V
REF
, (Note 5)
4.5V ≤ V
CC
≤ 5.5V, REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V, (Note 6)
5V ≤ V
CC
≤ 5.5V, REF
+
= 5V, REF
–
= GND, V
INCM
= 2.5V, (Note 6)
REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V, (Note 6)
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ IN
+
= IN
–
≤ V
CC
, (Note 13)
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ IN
+
= IN
–
≤ V
CC
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
IN
+
= 0.75 •
REF
+
, IN
–
= 0.25 •
REF
+
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
IN
+
= 0.75 •
REF
+
, IN
–
= 0.25 •
REF
+
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
IN
+
= 0.25 •
REF
+
, IN
–
= 0.75 •
REF
+
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
IN
+
= 0.25 •
REF
+
, IN
–
= 0.75 •
REF
+
4.5V ≤ V
CC
≤ 5.5V, REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V
5V ≤ V
CC
≤ 5.5V, REF
+
= 5V, REF
–
= GND, V
INCM
= 2.5V
REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V
5V ≤ V
CC
≤ 5.5V, REF
+
= 5V, V
REF
– = GND,
GND ≤ IN
–
= IN
+
≤ 5V, (Note 12)
14
2.5
Offset Error
Offset Error Drift
Positive Full-Scale Error
Positive Full-Scale Error Drift
Negative Full-Scale Error
Negative Full-Scale Error Drift
Total Unadjusted Error
l
2.5
0.03
12
ppm of V
REF
ppm of V
REF
/°C
l
2.5
0.03
3
3
4
0.8
12
ppm of V
REF
ppm of V
REF
/°C
ppm of V
REF
ppm of V
REF
ppm of V
REF
µV
RMS
Output Noise
2413fa
For more information
www.linear.com/LTC2413
3
LTC2413
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
PARAMETER
Input Common Mode Rejection DC
Input Common Mode Rejection
49Hz to 61.2Hz
Input Normal Mode Rejection
49Hz to 61.2Hz
Input Normal Mode Rejection
External Clock f
EOSC
/2560 ±14%
Input Normal Mode Rejection
External Clock f
EOSC
/2560 ±4%
Reference Common Mode
Rejection DC
Power Supply Rejection, DC
Power Supply Rejection
Simultaneous 50Hz/60Hz ±2%
CONDITIONS
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ IN
–
= IN
+
≤ V
CC
2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ IN
–
= IN
+
≤ V
CC
, (Note 7)
(Note 7)
External Oscillator
External Oscillator
2.5V ≤ REF
+
≤ V
CC
, GND ≤ REF
–
≤ 2.5V,
V
REF
= 2.5V, IN
–
= IN
+
= GND
REF
+
= 2.5V, REF
–
= GND, IN
–
= IN
+
= GND
REF
+
= 2.5V, REF
–
= GND,
IN
–
= IN
+
= GND, (Note 7)
l
l
l
l
l
l
converTer characTerisTics
The
l
denotes the specifications which apply over the full operating
MIN
130
140
87
87
110
130
140
140
120
120
TYP
140
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
analog inpuT anD reFerence
SYMBOL
IN
+
IN
–
V
IN
REF
+
REF
–
V
REF
C
S
(IN
+
)
C
S
(IN
–
)
C
S
(REF
+
)
C
S
(REF
–
)
I
DC_LEAK
(IN
+
)
I
DC_LEAK
(IN
–
)
I
DC_LEAK
(REF
+
)
I
DC_LEAK
(REF
–
)
PARAMETER
Absolute/Common Mode IN
+
Voltage
Absolute/Common Mode IN
–
Voltage
Input Differential Voltage Range
(IN
+
– IN
–
)
Absolute/Common Mode REF
+
Voltage
Absolute/Common Mode REF
–
Voltage
Reference Differential Voltage Range
(REF
+
– REF
–
)
IN
+
Sampling Capacitance
IN
–
Sampling Capacitance
REF
+
Sampling Capacitance
REF
–
Sampling Capacitance
IN
+
DC Leakage Current
IN
–
DC Leakage Current
REF
+
DC Leakage Current
REF
–
DC Leakage Current
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
CONDITIONS
l
l
l
l
l
l
MIN
GND – 0.3V
GND – 0.3V
–V
REF
/2
0.1
GND
0.1
TYP
MAX
V
CC
+ 0.3V
V
CC
+ 0.3V
–V
REF
/2
V
CC
V
CC
– 0.1V
V
CC
UNITS
V
V
V
V
V
V
pF
pF
pF
pF
18
18
18
18
CS
= V
CC
, IN
+
= GND
CS
= V
CC
, IN
–
= GND
CS
= V
CC
, REF
+
= 5V
CS
= V
CC
, REF
–
= GND
l
l
l
l
–10
–10
–10
–10
1
1
1
1
10
10
10
10
nA
nA
nA
nA
4
2413fa
For more information
www.linear.com/LTC2413
LTC2413
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
SYMBOL
V
IH
V
IL
V
IH
V
IL
I
IN
PARAMETER
High Level Input Voltage
CS,
F
O
Low Level Input Voltage
CS,
F
O
High Level Input Voltage
SCK
Low Level Input Voltage
SCK
Digital Input Current
CS,
F
O
Digital Input Current
SCK
C
IN
Digital Input Capacitance
CS,
F
O
Digital Input Capacitance
SCK
V
OH
V
OL
V
OH
V
OL
I
OZ
High Level Output Voltage
SDO
Low Level Output Voltage
SDO
High Level Output Voltage
SCK
Low Level Output Voltage
SCK
Hi-Z Output Leakage
SDO
(Note 8)
I
O
= –800µA
I
O
= 1.6mA
I
O
= –800µA (Note 9)
I
O
= 1.6mA (Note 9)
l
l
l
l
l
DigiTal inpuTs anD ouTpuTs
CONDITIONS
2.7V ≤ V
CC
≤ 5.5V
2.7V ≤ V
CC
≤ 3.3V
4.5V ≤ V
CC
≤ 5.5V
2.7V ≤ V
CC
≤ 5.5V
2.7V ≤ V
CC
≤ 5.5V (Note 8)
2.7V ≤ V
CC
≤ 3.3V (Note 8)
4.5V ≤ V
CC
≤ 5.5V (Note 8)
2.7V ≤ V
CC
≤ 5.5V (Note 8)
0V ≤ V
IN
≤ V
CC
0V ≤ V
IN
≤ V
CC
(Note 8)
l
l
l
l
l
l
MIN
2.5
2.0
TYP
MAX
UNITS
V
V
0.8
0.6
2.5
2.0
0.8
0.6
–10
–10
10
10
V
CC
– 0.5V
0.4
V
CC
– 0.5V
0.4
–10
10
10
10
V
V
V
V
V
V
µA
µA
pF
pF
V
V
V
V
µA
power requireMenTs
SYMBOL
V
CC
I
CC
PARAMETER
Supply Voltage
Supply Current
Conversion Mode
Sleep Mode
The
l
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 3)
CONDITIONS
l
MIN
2.7
TYP
MAX
5.5
UNITS
V
µA
µA
CS
= 0V (Note 11)
CS
= V
CC
(Note 11)
l
l
200
20
300
30
2413fa
For more information
www.linear.com/LTC2413
5
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