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參數(shù)資料
| 型號： | LTC1279C |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 12-Bit, 600ksps Sampling A/D Converter with Shutdown |
| 中文描述： | 12位，600ksps與關機采樣A / D轉換器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 327K |
| 代理商： | LTC1279C |
1
LTC1279
12-Bit, 600ksps Sampling
A/D Converter with Shutdown
D
U
ESCRIPTIO
The LTC
1279 is a 1.4
μ
s, 600ksps, sampling 12-bit A/D
converter which draws only 60mW from a single 5V or
±
5V supplies. This easy-to-use device comes complete
with a 160ns 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 reduced even more, drawing only
8.5mW in power shutdown mode. Instant wake-up from
power shutdown allows the converter to be powered
down even during brief inactive periods.
The LTC1279 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
i
ncludes 70dB S/(N+D) and 78dB THD at the input
frequency of 100kHz over temperature.
The internal clock is trimmed for 1.4
μ
s conversion time.
The clock automatically synchronizes to each sample
command, eliminating problems with asynchronous clock
noise found in competitive devices. A separate conversion
start input and a data-ready signal (BUSY) ease connec-
tions to FIFOs, DSPs and microprocessors.
S
FEATURE
I
Single Supply 5V or
±
5V Operation
I
Sample Rate: 600ksps
I
70dB S/(N + D) and 74dB THD at Nyquist
I
Power Dissipation: 60mW Typ
I
Power Shutdown with Instant Wake-Up
I
Internal Reference Can Be Overdriven Externally
I
Internal Synchronized Clock; No Clock Required
I
High Impedance Analog Input
I
Input Range: 0V to 5V or
±
2.5V
I
New Flexible, Friendly Parallel Interface Eases
Connections to DSPs and FIFOs
I
24-Pin SO Wide Package
U
A
O
PPLICATI
TYPICAL
, LTC and LT are registered trademarks of Linear Technology Corporation.
Single 5V Supply, 600kHz, 12-Bit Sampling A/D Converter
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A
IN
V
REF
AGND
D11(MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD
V
SS
BUSY
CS
RD
CONVST
SHDN
DV
DD
D0
D1
D2
D3
LTC1279
+
0.1
μ
F
10
μ
F
2.42V
REFERENCE
OUTPUT
ANALOG INPUT
(0V TO 5V)
10
μ
F
0.1
μ
F
5V
12-BIT
PARALLEL
BUS
μ
P CONTROL
LINES
LTC1279 TA01
+
CONVERSION-START INPUT
POWER SHUTDOWN INPUT
U
S
A
O
PPLICATI
I
High Speed Data Acquisition
I
Digital Signal Processing
I
Multiplexed Data Acquisition Systems
I
Audio and Telecom Processing
I
Spectrum Analysis
FREQUENCY (Hz)
10k
E
S
100k
1M
5M
1279 G03
12
11
10
9
8
7
6
5
4
3
2
1
0
74
68
62
56
50
f
SAMPLE
= 600kHz
NYQUIST
FREQUENCY
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