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LTC2471IMS#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC2471/LTC2473
4
24713fb
For more information www.linear.com/LTC2471
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 2, 7)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
CONV1
Conversion Time SPD = 0
l
4 4.8 ms
t
CONV2
Conversion Time SPD = 1
l
1 1.2 ms
f
SCL
SCL Clock Frequency
l
0 400 kHz
t
HD(SDA,STA)
Hold Time (Repeated) START Condition
l
0.6 µs
t
LOW
LOW Period of the SCL Pin
l
1.3 µs
t
HIGH
HIGH Period of the SCL Pin
l
0.6 µs
t
SU(STA)
Set-Up Time for a Repeated START
Condition
l
0.6 µs
t
HD(DAT)
Data Hold Time
l
0 0.9 µs
t
SU(DAT)
Data Set-Up Time
l
100 ns
t
r
Rise Time for SDA, SCL Signals (Note 6)
l
20 + 0.1C
B
300 ns
t
f
Fall Time for SDA, SCL Signals (Note 6)
l
20 + 0.1C
B
300 ns
t
SU(STO)
Set-Up Time for STOP Condition
l
0.6 µs
t
BUF
Bus Free Time Between a STOP and
START Condition
l
1.3 µs
t
OF
Output Fall Time V
IHMIN
to V
ILMAX
Bus Load C
B
= 10pF to 400pF (Note 6)
l
20 + 0.1C
B
250 ns
t
SP
Input Spike Suppression
l
50 ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. All voltage values are with respect to GND. V
CC
= 2.7V to 5.5V
unless otherwise specified.
V
REFCM
= V
REF
/2, FS = V
REF
,
–V
REF
≤ V
IN
≤ V
REF
V
IN
= V
IN
+
– V
IN
–
, V
INCM
= (V
IN
+
+ V
IN
–
)/2. (LTC2473)
Note 3. Guaranteed by design, not subject to test.
Note 4. Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
Note 5: Input sampling current is the average input current drawn from
the input sampling network while the LTC2471/LTC2473 are converting.
Note 6: C
B
= capacitance of one bus line in pF.
Note 7: All values refer to V
IH(MIN
) and V
IL(MAX)
levels.
Note 8: A positive current is flowing into the DUT pin.
Note 9: Voltage temperature coefficient is calculated by dividing the
maximum change in output voltage by the specified temperature range.
i
2
c TiMing characTerisTics
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Notes 2, 7)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage
l
0.7V
CC
V
V
IL
Low Level Input Voltage
l
0.3V
CC
V
I
I
Digital Input Current (Note 8)
l
–10 10 µA
V
HYS
Hysteresis of Schmidt Trigger Inputs (Note 3)
l
0.05V
CC
V
V
OL
Low Level Output Voltage (SDA) I = 3mA
l
0.4 V
I
IN
Input Leakage 0.1V
CC
≤ V
IN
≤ 0.9V
CC
l
1 µA
C
I
Capacitance for Each I/O Pin
l
10 pF
C
B
Capacitance Load for Each Bus Line
l
400 pF
V
IH(A0)
High Level Input Voltage for Address Pin
l
0.95V
CC
V
V
IL(A0)
Low Level Input Voltage for Address Pin
l
0.05V
CC
V
i
2
c inpuTs anD ouTpuTs
LTC2471/LTC2473
5
24713fb
For more information www.linear.com/LTC2471
Typical perForMance characTerisTics
Offset Error vs Temperature ADC Gain Error vs Temperature Transition Noise vs Temperature
Conversion Mode Power Supply
Current vs Temperature
Sleep Mode Power Supply
Current vs Temperature
V
REF
vs Temperature
(T
A
= 25°C, unless otherwise noted)
TEMPERATURE (°C)
OFFSET ERROR (LSB)
15
35
24713 G04
10
20
25
30
5
0
V
CC
= 5.5V
V
CC
= 4.1V
V
CC
= 2.7V
–50
–10 10–30
50 70
30
90
TEMPERATURE (°C)
–50
ADC GAIN ERROR (LSB)
50
0
24713 G05
–10
30
10
20
40
–30 30 50 7010–10 90
V
CC
= 5.5V
V
CC
= 4.1V
V
CC
= 2.7V
TEMPERATURE (°C)
TRANSITION NOISE RMS (µV)
6
10
24713 G06
4
5
7
8
9
3
2
1
0
–50
–10 10–30
50 70
30
90
V
CC
= 5.5V
V
CC
= 2.7V
–50
–10 10–30
50 70
30
90
V
CC
= 5.5V
V
CC
= 2.7V
TEMPERATURE (°C)
CONVERSION CURRENT (mA)
4.0
3.9
24713 G07
3.4
3.5
3.6
3.7
3.8
3.3
3.2
3.1
3.0
V
CC
= 4.1V
–50
–10 10–30
50 70
30
90
V
CC
= 5.5V
TEMPERATURE (°C)
SLEEP CURRENT (nA)
350
150
300
250
200
100
50
0
V
CC
= 2.7V
V
CC
= 4.1V
–50
–10 10–30
50 70
30
90
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
1.2508
24713 G09
1.2502
1.2503
1.2504
1.2505
1.2506
1.2507
Integral Nonlinearity Integral Nonlinearity Maximum INL vs Temperature
DIFFERENTIAL INPUT VOLTAGE (V)
–1.25 –0.75 –0.25
INL (LSB)
1
3
24713 G02
–1
0
2
–2
–3
0.25 0.75
1.25
V
CC
= 5.5V
T
A
= –45°C, 25°C, 90°C
OUTPUT RATE = 208sps
TEMPERATURE (°C)
INL (LSB)
2
6
24713 G03
–2
0
4
–4
–6
–50 –30
10 30 50 70
–10
90
V
CC
= 5.5V
V
CC
= 4.1V
V
CC
= 2.7V
OUTPUT RATE = 208sps
DIFFERENTIAL INPUT VOLTAGE (V)
–1.25 –0.75 –0.25
INL (LSB)
1
3
24713 G01
–1
0
2
–2
–3
0.25 0.75
1.25
V
CC
= 2.7V
T
A
= –45°C, 25°C, 90°C
OUTPUT RATE = 208sps
LTC2471/LTC2473
6
24713fb
For more information www.linear.com/LTC2471
pin FuncTions
REFOUT (Pin 1): Reference Output Pin. Nominally 1.25V,
this voltage sets the full-scale input range of the ADC. For
noise and reference stability connect to a 0.1µF capacitor
tied to GND. This capacitor value must be less than or
equal to the capacitor tied to the reference compensa
-
tion pin (COMP). REFOUT must not be overdriven by an
external reference.
COMP (Pin 2): Internal Reference Compensation Pin. For
low noise and reference stability, tie a 0.1μF capacitor to
GND.
A0 (Pin 3): Chip Address Control Pin. The A0 pin can be
tied to GND or V
CC
. If A0 is tied to GND, the LTC2471/
LTC2473 I
2
C address is 0010100. If A0 is tied to V
CC
, the
LTC2471/LTC2473 I
2
C address is 1010100.
GND (Pins 4, 7, 11, (Exposed Pad Pin 13 – DFN Package
Only)): Ground. Connect exposed pad directly to the ground
plane through a low impedance connection.
SCL (Pin 5): Serial Clock Input of the I
2
C Interface. The
LTC2471/LTC2473 can only act as an I
2
C slave and the SCL
pin only accepts an external serial clock. Data is shifted
into the SDA pin on the rising edges of SCL and output
through the SDA pin on the falling edges of SCL.
SDA (Pin 6): Bidirectional Serial Data Line of the I
2
C Inter-
face. The conversion result is output through the SDA pin.
The pin is high impedance unless the LTC2471/LTC2473
is in the data output mode. While the LTC2471/LTC2473 is
in the data output mode, SDA is an open drain pull down
(which requires an external 1.7k pull-up resistor to V
CC
).
REF
–
(Pin 8): Negative Reference Input to the ADC. The
voltage on this pin sets the zero input to the ADC. This
pin should tie directly to ground or the ground sense of
the input sensor.
IN
+
(LTC2473), IN (LTC2471) (Pin 9): Positive input volt-
age for the LTC2473 differential device. ADC input for the
LTC2471 single-ended device.
IN
–
(LTC2473), GND (LTC2471) (Pin 10): Negative input
voltage for the LTC2473 differential device. GND for the
LTC2471 single-ended device.
V
CC
(Pin 12): Positive Supply Voltage. Bypass to GND with
a 10μF capacitor in parallel with a low-series-inductance
0.1μF capacitor located as close to pin 12 as possible.
Typical perForMance characTerisTics
(T
A
= 25°C, unless otherwise noted)
Power Supply Rejection
vs Frequency Applied to V
CC
Conversion Time vs Temperature
10 100 1k1
100k 1M
10k
10M
FREQUENCY AT V
CC
(Hz)
REJECTION (dB)
0
24713 G010
–120
–100
–80
–60
–40
–20
T
A
= 25°C
TEMPERATURE (°C)
–50
CONVERSION TIME (ms)
24713 G11
4.4
4.0
4.1
4.2
4.3
3.9
3.8
–25
25 50 75
0
100
V
CC
= 2.7V
V
CC
= 4.1V
V
CC
= 5.5V
V
REF
vs V
CC
2.0 3.52.5 4.03.0 5.0 5.54.5 6.0
V
CC
(V)
V
REF
(V)
1.250345
1.250340
24713 G12
1.250305
1.250310
1.250315
1.250320
1.250325
1.250330
1.250335
T
A
= 25°C
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LTC2471IMS#TRPBF

Mfr. #:
Buy LTC2471IMS#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC Selectable 208Hz/833Hz, Single-Ended, 16-Bit delta sigma ADC with 10ppm/deg C Max Reference and I2C Interface
Lifecycle:
New from this manufacturer.
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