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LTC2460CMS#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC2460/LTC2462
4
24602fa
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
CONV
Conversion Time
l
13 16.6 23 ms
f
SCK
SCK Frequency Range
l
2 MHz
t
lSCK
SCK Low Period
l
250 ns
t
hSCK
SCK High Period
l
250 ns
t
1
CS Falling Edge to SDO Low Z (Notes 7, 8)
l
0 100 ns
t
2
CS Rising Edge to SDO High Z (Notes 7, 8)
l
0 100 ns
t
3
CS Falling Edge to SCK Falling Edge
l
100 ns
t
KQ
SCK Falling Edge to SDO Valid (Note 7)
l
0 100 ns
t
4
SDI Setup Before SCK↑
(Note 3)
l
100 ns
t
5
SDI Hold After SCK↑
(Note 3)
l
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
IN
= V
IN
+
– V
IN
–
, –V
REF
≤ V
IN
≤ V
REF
; V
INCM
= (V
IN
+
+ V
IN
–
)/2.
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.
Guaranteed by design and test correlation.
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 4.
Note 8: See Figure 5.
Note 9: Input sampling current is the average input current drawn from the
input sampling network while the LTC2460/LTC2462 is actively sampling
the input.
Note 10: A positive current is flowing into the DUT pin.
Note 11: 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
LTC2460/LTC2462
5
24602fa
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)
1
5
24602 G04
–1
0
2
3
4
–2
–3
–4
–5
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)
25
5
24602 G05
0
15
10
20
–25 25 50 750 100
V
CC
= 5.5V
V
CC
= 4.1V
V
CC
= 2.7V
TEMPERATURE (°C)
TRANSITION NOISE RMS (µV)
6
10
24602 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)
2.0
1.9
24602 G07
1.4
1.5
1.6
1.7
1.8
1.3
1.2
1.1
1.0
V
CC
= 4.1V
–50
–10 10–30
50 70
30
90
V
CC
= 5.5V
V
CC
= 2.7V
V
CC
= 4.1V
TEMPERATURE (°C)
SLEEP CURRENT (nA)
350
24602 G08
150
300
250
200
100
50
0
–50
–10 10–30
50 70
30
90
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
1.2508
24602 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
24602 G02
–1
0
2
–2
–3
0.25 0.75
1.25
V
CC
= 2.7V
T
A
= –45°C, 25°C, 90°C
TEMPERATURE (°C)
–55
INL (LSB)
1
3
24602 G03
–1
0
2
–2
–3
–35 –15
25 45 65 85
5
125105
V
CC
= 5.5V, 4.1V, 2.7V
DIFFERENTIAL INPUT VOLTAGE (V)
–1.25 –0.75 –0.25
INL (LSB)
1
3
24602 G01
–1
0
2
–2
–3
0.25 0.75
1.25
V
CC
= 5.5V
T
A
= –45°C, 25°C, 90°C
LTC2460/LTC2462
6
24602fa
pin FuncTions
REFOUT (Pin 1): Reference Output Pin. Nominally 1.25V,
this voltage sets the fullscale 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. For applications that require an input range
greater than 0V to 1.25V, please refer to the LTC2450/
LTC2452.
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 30Hz/60Hz output rate (LTC2460).
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 and can be used to monitor the conversion status.
GND (Pins 7, 11): 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 tie directly to ground or the ground sense of
the input sensor.
IN
+
(LTC2462), IN (LTC2460) (Pin 9): Positive input volt-
age for the LTC2462 differential device. ADC input for the
LTC2460 single-ended device.
IN
–
(LTC2462), GND (LTC2460) (Pin 10): Negative input
voltage for the LTC2462 differential device. GND for the
LTC2460 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 the device as possible.
Exposed Pad (Pin 13 – DFN Package): Ground. Connect
directly to the ground plane through a low impedance
connection.
Typical perForMance characTerisTics
(T
A
= 25°C, unless otherwise noted)
Power Supply Rejection
vs Frequency at V
CC
Conversion Time vs Temperature
FREQUENCY AT V
CC
(Hz)
1
REJECTION (dB)
0
24602 G10
–20
–40
–60
–80
–100
–120
10
1k 10k 100k 1M
100
10M
TEMPERATURE (°C)
–50
CONVERSION TIME (ms)
21
24602 G11
20
16
17
18
19
15
14
–25
25 50 75
0
100
V
CC
= 5V, 4.1V, 3V
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)
1.24892
1.24891
24602 G12
1.24884
1.24885
1.24886
1.24887
1.24888
1.24889
1.24890
T
A
= 25°C
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LTC2460CMS#PBF

Mfr. #:
Buy LTC2460CMS#PBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 16-Bit SPI 60Hz Single-Ended Delta Sigma ADC with Internal Reference
Lifecycle:
New from this manufacturer.
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