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LTC1415ISW#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
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LTC1415
12-Bit, 1.25Msps, 55mW
Sampling A/D Converter
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
1.25MHz, 12-Bit Sampling A/D Converter
, LTC and LT are registered trademarks of Linear Technology Corporation.
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
S
F
EA
T
U
RE
■
1.25Msps Sample Rate
■
Single 5V Supply
■
Power Dissipation: 55mW
■
Nap and Sleep Power Shutdown Modes
■
±
0.35LSB INL and
±
0.25LSB DNL
■
72dB S/(N + D) and 80dB THD at 100kHz
■
External or Internal Reference Operation
■
True Differential Inputs Reject Common Mode Noise
■
Input Range: 4.096V (1mV/LSB)
■
28-Pin SSOP and SO Packages
D
U
ESCRIPTIO
The LTC
®
1415 is a 700ns, 1.25Msps, 12-bit sampling
A/D converter that draws only 55mW from a single 5V
supply. This easy-to-use device includes a high dynamic
range sample-and-hold, precision reference and a trimmed
internal clock. Two power shutdown modes provide flex-
ibility for low power systems.
The LTC1415’s full-scale input range is 4.096V. Low
linearity errors ±0.35LSB INL, ±0.25LSB DNL make it
ideal for imaging systems. Outstanding AC performance
includes 72dB
S/(N + D) and 80dB THD with an input
frequency of 100kHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 18MHz
bandwidth. The 60dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source.
The ADC has a µP compatible, 12-bit parallel output port.
There is no pipeline delay in the conversion results. A
separate convert start input and data ready signal (BUSY)
ease connections to FIFOs, DSPs and microprocessors. A
separate output logic supply pin allows direct connection
to 3V components.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+A
IN
–A
IN
V
REF
REFCOMP
AGND
D11(MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD
DV
DD
OV
DD
BUSY
CS
CONVST
RD
SHDN
NAP/SLP
OGND
D0
D1
D2
D3
LTC1415
10µF
DIFFERENTIAL
ANALOG INPUT
(0V TO 4.096V)
2.50V
V
REF
OUTPUT
10µF
5V
12-BIT
PARALLEL
BUS
µP CONTROL
LINES
1415 TA01
OUTPUT LOGIC
SUPPLY 3V OR 5V
INPUT FREQUENCY (Hz)
1k
EFFECTIVE BITS
SIGNAL/(NOISE + DISTORTION) (dB)
12
11
10
9
8
7
6
5
4
3
2
1
0
74
68
62
56
10k 100k
LTC1415 • TA02
1M 2M
NYQUIST
FREQUENCY
f
SAMPLE
= 1.25Msps
U
S
A
O
PP
L
IC
AT
I
■
High Speed Data Acquisition
■
Imaging Systems
■
Digital Signal Processing
■
Multiplexed Data Acquisition Systems
■
Telecommunications
2
LTC1415
AV
DD
= DV
DD
=OV
DD
= V
DD
(Notes 1, 2)
Supply Voltage (V
DD
)................................................ 6V
Analog Input Voltage (Note 3) ...... – 0.3V to V
DD
+ 0.3V
Digital Input Voltage (Note 4) .................. – 0.3V to 12V
Digital Output Voltage.................... – 0.3V to V
DD
+ 0.3V
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC1415C .............................................. 0°C to 70°C
LTC1415I........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER
PART NUMBER
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 Bits
Integral Linearity Error (Note 7) ● 0.35 ±1 LSB
Differential Linearity Error ● 0.25 ±1 LSB
Offset Error (Note 8) ±1 ±6 LSB
● ±8 LSB
Full-Scale Error ±20 LSB
Full-Scale Tempco I
OUT(REF)
= 0 ±15 ppm/°C
CCHARA TERIST
ICS
CO
U
VERTER
With Internal Reference (Notes 5, 6)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (Note 9) 4.75V ≤ V
DD
≤ 5.25V ● 4.096 V
I
IN
Analog Input Leakage Current CS = High ● ±1 µA
C
IN
Analog Input Capacitance Between Conversions 19 pF
During Conversions 5 pF
t
ACQ
Sample-and-Hold Acquisition Time ● 50 150 ns
t
AP
Sample-and-Hold Aperture Delay Time –1.5 ns
t
jitter
Sample-and-Hold Aperture Delay Time Jitter 2 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio 0V < V
CM
< V
DD
, DC to MHz 60 dB
(Note 5)
PUT
U
IA
A
U
LOG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+A
IN
–A
IN
V
REF
REFCOMP
AGND
D11 (MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD
DV
DD
OV
DD
BUSY
CS
CONVST
RD
SHDN
NAP/SLP
OGND
D0
D1
D2
D3
SW PACKAGE
28-LEAD PLASTIC SO WIDE
G PACKAGE
28-LEAD PLASTIC SSOP
TOP VIEW
Consult factory for Military grade parts.
LTC1415CG
LTC1415CSW
LTC1415IG
LTC1415ISW
T
JMAX
= 110°C, θ
JA
= 95°C/W (G)
T
JMAX
= 110°C, θ
JA
= 130°C/W (SW)
3
LTC1415
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-(Noise + Distortion) Ratio 100kHz Input Signal 72 dB
600kHz Input Signal 69 dB
THD Total Harmonic Distortion 100kHz Input Signal, First 5 Harmonics –80 dB
600kHz Input Signal, First 5 Harmonics –72 dB
SFDR Spurious Free Dynamic Range 600kHz Input Signal –75 dB
IMD Intermodulation Distortion f
IN1
= 29.37kHz, f
IN2
= 32.446kHz –84 dB
Full-Power Bandwidth 18 MHz
Full-Linear Bandwidth S/(N + D) ≥ 68dB 1 MHz
(Note 5)
ACCURACY
IC
DY
U
W
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 2.480 2.500 2.520 V
V
REF
Output Tempco I
OUT
= 0 ±15 ppm/°C
V
REF
Line Regulation 4.75V ≤ V
DD
≤ 5.25V 0.01 LSB/V
V
REF
Output Resistance I
OUT
≤ 0.1mA 2 kΩ
REFCOMP Output Voltage I
OUT
= 0 4.096 V
DIGITAL I PUTS A D DIGITAL OUTPUTS
U
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
DD
= 5.25V ● 2.4 V
V
IL
Low Level Input Voltage V
DD
= 4.75V ● 0.8 V
I
IN
Digital Input Current V
IN
= 0V to V
DD
● ±10 µA
C
IN
Digital Input Capacitance 5pF
V
OH
High Level Output Voltage V
DD
= 4.75V
I
O
= –10µA 4.5 V
I
O
= –200µA ● 4.0 V
V
OL
Low Level Output Voltage V
DD
= 4.75V
I
O
= 160µA 0.05 V
I
O
= 1.6mA ● 0.10 0.4 V
I
OZ
Hi-Z Output Leakage D11 to D0 V
OUT
= 0V to V
DD
, CS High ● ±10 µA
C
OZ
Hi-Z Output Capacitance D11 to D0 CS High (Note 9 ) ● 15 pF
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
DD
10 mA
POWER REQUIRE E TS
W
U
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Supply Voltage (Notes 10, 11) 4.75 5.25 V
I
DD
Supply Current CS High ● 11 20 mA
Nap Mode SHDN = 0V, NAP/SLP = 5V (Note 12)
● 1.5 2.3 mA
Sleep Mode SHDN = 0V, NAP/SLP = 0V (Note 12) 1.0 µA
P
D
Power Dissipation CS High 55 100 mW
Nap Mode SHDN = 0V, NAP/SLP = 5V 7.5 12 mW
Sleep Mode SHDN = 0V, NAP/SLP = 0V 0.01 mW
(Note 5)
(Note 5)
I TER AL REFERE CE CHARACTERISTICS
U
UU
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LTC1415ISW#TRPBF

Mfr. #:
Buy LTC1415ISW#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 12-B, 1.25Msps, 55mW Smpl A/D Conv
Lifecycle:
New from this manufacturer.
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