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LTC1282ACSW Datasheet

  • LTC1282ACSW

  • 3V 140ksps 12-Bit Sampling A/D Converter with Reference

  • 24頁(yè)

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LTC1282
3V 140ksps 12-Bit
Sampling A/D Converter
with Reference
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Single Supply 3V or
鹵3V
Operation
140ksps Throughput Rate
12mW (Typ) Power Dissipation
On-Chip 25ppm/擄C Reference
Internal Synchronized Clock; No Clock Required
High Impedance Analog Input
69dB S/(N + D) and 77dB THD at Nyquist
鹵0.5LSB
INL and
鹵0.75LSB
DNL Max (A Grade)
2.7V Guaranteed Minimum Supply Voltage
ESD Protected On All Pins
24-Pin Narrow PDIP and SW Packages
0V to 2.5V or
鹵1.25V
Input Ranges
The LTC
廬
1282 is a 6碌s, 140ksps, sampling 12-bit A/D
converter that draws only 12mW from a single 3V or dual
鹵3V
supply. This easy-to-use device comes complete with
1.14碌s sample-and-hold, precision reference and inter-
nally trimmed clock. Unipolar and bipolar conversion
modes provide flexibility for various applications. They are
built with LTBiCMOS
TM
switched capacitor technology.
The LTC1282 has a 25ppm/擄C (max) internal reference
and converts 0V to 2.5V unipolar inputs from a single 3V
supply. With
鹵3V
supplies its input range is
鹵1.25V
with
two鈥檚 complement output format. Maximum DC specifica-
tions include
鹵0.5LSB
INL,
鹵0.75LSB
DNL and 25ppm/擄C
full-scale drift over temperature. Outstanding AC perfor-
mance includes 69dB S/(N + D) and 77dB THD at the
Nyquist input frequency of 70kHz.
The internal clock is trimmed for 6碌s maximum conver-
sion time. The clock automatically synchronizes to each
sample command eliminating problems with asynchro-
nous clock noise found in competitive devices. A high
speed parallel interface eases connections to FIFOs, DSPs
and microprocessors.
APPLICATI
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s
s
S
3V Powered Systems
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.
LTBiCMOS is a trademark of Linear Technology Corporation
TYPICAL APPLICATI
Single 3V Supply, 140ksps, 12-Bit Sampling A/D Converter
LTC1282
1.20V
V
REF
OUTPUT
ANALOG INPUT 1 A
V
DD
(0V TO 2.5V) 2
IN
V
REF
V
SS
3
AGND
BUSY
0.1碌F
4
D11(MSB) CS
5
D10
RD
6
D9
HBEN
7
D8
NC
8
D7
NC
9
D6
D0/8
10
8- OR 12-BIT
D5
D1/9
PARALLEL BUS
11
D4
D2/10
12
DGND
D3/11
24
23
22
21
20
19
18
17
16
15
14
13
10碌F
碌P
CONTROL
LINES
0.1碌F
3V
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
12
74
68
62
NYQUIST
FREQUENCY
56
50
ENOBs (EFFECTIVE NUMBER OF BITS)
+
11
10
9
8
7
6
5
4
3
2
1
0
1k
10k
INPUT FREQUENCY (Hz)
100k
LTC1282 鈥?TA02
+
10碌F
f
SAMPLE
= 140kHz
1282 TA01
U
S/(N + D) (dB)
UO
UO
1

LTC1282ACSW 產(chǎn)品屬性

  • LTC1282

  • 32

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器

  • -

  • 12

  • 140k

  • 并聯(lián)

  • 1

  • 24mW

  • 雙 ±

  • 0°C ~ 70°C

  • 表面貼裝

  • 24-SOIC（0.295"，7.50mm 寬）

  • 24-SOIC

  • 管件

  • 1 個(gè)單端，單極；1 個(gè)單端，雙極

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