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LTC1278-4CSW#PBF

Description
1-Channel Single ADC SAR 400ksps 12-bit Parallel 24-Pin SOIC W Tube
File Size259KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1278-4CSW#PBF Overview

1-Channel Single ADC SAR 400ksps 12-bit Parallel 24-Pin SOIC W Tube

LTC1278-4CSW#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Converter TypeGeneral Purpose
ArchitectureSAR
Resolution12bit
Number of ADCs1
Number of Input Channels1
Sampling Rate400ksps
Digital Interface TypeParallel
Input TypeVoltage
Input Signal TypeSingle-Ended
Voltage ReferenceInternal|External
Polarity of Input VoltageUnipolar|Bipolar
Voltage Supply SourceSingle|Dual
Input Voltage5V|±2.5V
Minimum Single Supply Voltage (V)4.75
Typical Single Supply Voltage (V)5
Maximum Single Supply Voltage (V)5.25
Minimum Dual Supply Voltage (V)-2.45/4.75
Typical Dual Supply Voltage (V)±5
Maximum Dual Supply Voltage (V)±5.25
Typical Power Dissipation (mW)75
Maximum Power Dissipation (mW)150
Integral Nonlinearity Error±1LSB
Full Scale Error±15LSB
No Missing Codes (bit)12
Sample and HoldYes
Single-Ended InputYes
Digital Supply SupportYes
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
PackagingTube
Supplier Temperature GradeCommercial
Pin Count24
Standard Package NameSOP
Supplier PackageSOIC W
MountingSurface Mount
Package Height2.34(Max)
Package Length15.6(Max)
Package Width7.6(Max)
PCB changed24
Lead ShapeGull-wing
LTC1278
12-Bit, 500ksps Sampling
A/D Converter with Shutdown
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
Single Supply 5V or
±5V
Operation
Two Speed Grades,500ksps (LTC1278-5)
400ksps (LTC1278-4)
70dB S/(N + D) and 74dB THD at Nyquist
No Missing Codes Over Temperature
75mW (Typ) Power Dissipation
Power Shutdown with Instant Wake-Up
Internal Reference Can Be Overdriven Externally
Internal Synchronized Clock; No Clock Required
High Impedance Analog Input
0V to 5V or
±2.5V
Input Range
New Flexible, Friendly Parallel Interface to DSPs
and FIFOs
24-Pin Narrow PDIP and SW Packages
The LTC
®
1278 is a 1.6µs, 500ksps, sampling 12-bit A/D
converter that draws only 75mW from a single 5V or
±5V
supplies. This easy-to-use device comes complete with
a 200ns sample-and-hold, a precision reference and an
internally trimmed clock. Unipolar and bipolar conver-
sion modes add to the flexibility of the ADC. The low
power dissipation is made even more attractive by a
8.5mW power-down feature. Instant wake-up from shut-
down allows the converter to be powered down even
during brief inactive periods.
The LTC1278 converts 0V to 5V unipolar inputs from a
single 5V supply and
±2.5V
bipolar inputs from
±5V
supplies. Maximum DC specs include
±1LSB
INL and
±1LSB
DNL. Outstanding guaranteed AC performance
includes 70dB S/(N + D) and 78dB THD at the input
frequency of 100kHz over temperature.
The internal clock is trimmed for 1.6µs conversion time.
The clock automatically synchronizes to each sample
command, eliminating problems with asynchronous clock
noise found in competitive devices. A separate convert
start input and a data ready signal (BUSY) ease connec-
tions to FIFOs, DSPs and microprocessors.
APPLICATI
s
s
s
s
s
S
High Speed Data Acquisition
Digital Signal Processing
Multiplexed Data Acquisition Systems
Audio and Telecom Processing
Spectrum Analysis
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
2.42V
REFERENCE
OUTPUT
Single 5V Supply, 500kHz, 12-Bit Sampling A/D Converter
LTC1278-5
ANALOG INPUT 1 A
AV
DD
(0V TO 5V) 2
IN
V
REF
V
SS
3
AGND
BUSY
0.1µF
4
D11(MSB) CS
5
D10
RD
6
D9
CONVST
7
D8
SHDN
8
D7
DV
DD
9
D6
D0
10
12-BIT
D5
D1
PARALLEL
11
D4
D2
BUS
12
DGND
D3
5V
24
23
22
21
20
19
18
17
16
15
14
13
10µF
µP
CONTROL
LINES
CONVERSION START INPUT
POWER DOWN INPUT
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
12
74
68
NYQUIST
FREQUENCY
62
56
+
+
10µF
0.1µF
EFFECTIVE NUMBER OF BITS
11
10
9
8
7
6
5
4
3
2
1
0
10k
f
SAMPLE
= 500kHz
100k
INPUT FREQUENCY (Hz)
1M
LTC1278 • TA01
U
S/(N+D) (dB)
2M
LT1278 G4
UO
UO
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