OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC2470IDD#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC2470/LTC2472
4
24702fb
For more information www.linear.com/LTC2470
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
CONV1
Conversion Time SPD = 0
l
3.2 4 4.8 ms
t
CONV2
Conversion Time SPD = 1
l
0.8 1 1.2 ms
f
SCK
SCK Frequency Range
l
2 MHz
t
lSCK
SCK Low Period (Note 7)
l
250 ns
t
hSCK
SCK High Period (Note 7)
l
250 ns
t
1
CS Falling Edge to SDO Low Z (Note 7)
l
0 100 ns
t
2
CS Rising Edge to SDO High Z (Note 7)
l
0 100 ns
t
3
CS Falling Edge to SCK Falling Edge (Note 7)
l
100 ns
t
4
SDI Setup Before SCK↑
(Notes 3, 7)
l
100 ns
t
5
SDI Hold After SCK↑
(Notes 3, 7)
l
100 ns
t
KQ
SCK Falling Edge to SDO Valid (Note 7)
l
0 100 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. (LTC2472)
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: CS = V
CC
. A positive current is flowing into the DUT pin.
Note 6: SCK = V
CC
or GND. SDO is high impedance.
Note 7: See Figure 5.
Note 8: Input sampling current is the average input current drawn from
the input sampling network while the LTC2470/LTC2472 is actively
sampling the input.
Note 9: Temperature coefficient is calculated by dividing the maximum
change in output voltage by the specified temperature range.
TiMing characTerisTics
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage
l
V
CC
– 0.3 V
V
IL
Low Level Input Voltage
l
0.3 V
I
IN
Digital Input Current
l
–10 10 µA
C
IN
Digital Input Capacitance 10 pF
V
OH
High Level Output Voltage I
O
= –800µA
l
V
CC
– 0.5 V
V
OL
Low Level Output Voltage I
O
= 1.6mA
l
0.4 V
I
OZ
Hi-Z Output Leakage Current
l
–10 10 µA
DigiTal inpuTs anD DigiTal ouTpuTs
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
l
2.7 5.5 V
I
CC
Supply Current
Conversion
Conversion
Nap
Sleep
CS = GND (Note 6) LTC2472
CS = GND (Note 6) LTC2470
CS = V
CC
(Note 6)
CS = V
CC
(Note 6)
l
l
l
l
3.5
2.5
800
0.2
5
4
1500
2
mA
mA
µA
µA
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
power requireMenTs
LTC2470/LTC2472
5
24702fb
For more information www.linear.com/LTC2470
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
24702 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
24702 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
24702 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
24702 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
24702 G08
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
24702 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
24702 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
DIFFERENTIAL INPUT VOLTAGE (V)
–1.25 –0.75 –0.25
INL (LSB)
1
3
24702 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
24702 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
LTC2470/LTC2472
6
24702fb
For more information www.linear.com/LTC2470
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 compensation
pin (COMP). REFOUT cannot 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.
CS (Pin 3): Chip Select (Active LOW) Digital Input. A LOW
on this pin enables the SDO output. A HIGH on this pin
places the SDO output pin in a high impedance state and
any inputs on SDI and SCK will be ignored.
SDI (Pin 4): Serial Data Input Pin. This pin is used to pro
-
gram the sleep mode and the 208sps/833sps output rate.
SCK (Pin 5): Serial Clock Input. SCK synchronizes the
serial data input/output. Once the conversion is complete,
a new data bit is produced at the SDO pin following each
SCK falling edge. Data is shifted into the SDI pin on each
rising edge of SCK.
SDO (Pin 6): Three-State Serial Data Output. SDO is used
for serial data output during the DATA INPUT/OUTPUT
state. This pin goes Hi-Z when CS is high.
GND (Pins 7, 11, Exposed Pad Pin 13 – DFN Package):
Ground. Connect directly to the ground plane through a
low impedance connection.
REF
–
(Pin 8): Negative Reference Input to the ADC. The
voltage on this pin sets the zero input to the ADC. This
pin should be tied directly to ground or the ground sense
of the input sensor.
IN
+
(LTC2472), IN (LTC2470) (Pin 9): Positive input volt-
age for the LTC2472 differential device. ADC input for the
LTC2470 single-ended device.
IN
–
(LTC2472), GND (LTC2470) (Pin 10): Negative input
voltage for the LTC2472 differential device. GND for the
LTC2470 single-ended device.
V
CC
(Pin 12): Positive Supply Voltage. Bypass to GND
with a 10μF capacitor in parallel with a low-series-induc-
tance 0.1μF capacitor located as close to the device 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
24702 G010
–120
–100
–80
–60
–40
–20
T
A
= 25°C
TEMPERATURE (°C)
–50
CONVERSION TIME (ms)
24702 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
24702 G12
1.250305
1.250310
1.250315
1.250320
1.250325
1.250330
1.250335
T
A
= 25°C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

LTC2470IDD#TRPBF

Mfr. #:
Buy LTC2470IDD#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 SPI Interface
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet