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LTC1276 Datasheet(PDF) 1 Page - Linear Technology

Part No. LTC1276
Description  12-Bit, 300ksps Sampling A/D Converters with Reference
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1276 Datasheet(HTML) 1 Page - Linear Technology

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1
LTC1273
LTC1275/LTC1276
127356fa
Single Supply 5V or
±5V Operation
300ksps Sample Rate
75mW (Typ) Power Dissipation
On-Chip 25ppm/
°C Reference
Internal Synchronized Clock; No Clock Required
High Impedance Analog Input
70dB S/(N + D) and 77dB THD at Nyquist
±1/2LSB INL and ±3/4LSB DNL Max (A Grade)
ESD Protected On All Pins
24-Pin Narrow PDIP and SW Packages
Variety of Input Ranges:
0V to 5V (LTC1273)
±2.5V (LTC1275)
±5V (LTC1276)
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
AIN
VREF
AGND
D11
D10
D9
D8
D7
D6
D5
D4
DGND
VDD
NC
BUSY
CS
RD
HBEN
NC
NC
D0/8
D1/9
D2/10
D3/11
LTC1273
+
0.1
µF
10
µF
2.42V
VREF
OUTPUT
ANALOG INPUT
(0V TO 5V)
+
10
µF
0.1
µF
5V
8- OR 12-BIT
PARALLEL BUS
µP CONTROL
LINES
LTC1273/75/76 • TA01
INPUT FREQUENCY (Hz)
10k
0
3
5
7
10
100k
2M
LTC1273/75/76 • TA02
1
4
6
9
12
11
8
2
1M
62
56
74
68
50
fSAMPLE = 300kHz
NYQUIST
FREQUENCY
High Speed Data Acquisition
Digital Signal Processing
Multiplexed Data Acquisition Systems
Audio and Telecom Processing
Spectrum Analysis
The LTC
®1273/LTC1275/LTC1276 are 300ksps, sam-
pling 12-bit A/D converters that draw only 75mW from
single 5V or
±5V supplies. These easy-to-use devices
come complete with 600ns sample-and-holds, precision
references and internally trimmed clocks. Unipolar and
bipolar conversion modes provide flexibility for various
applications. They are built with LTBiCMOS
TM switched
capacitor technology.
These devices have 25ppm/
°C (max) internal references.
The LTC1273 converts 0V to 5V unipolar inputs from a
single 5V supply. The LTC1275/LTC1276 convert
±2.5V
and
±5V respectively from ±5V supplies. Maximum DC
specifications include
±1/2LSB INL, ±3/4LSB DNL and
25ppm/
°C full scale drift over temperature. Outstanding
AC performance includes 70dB S/(N + D) and 77dB THD
at the Nyquist input frequency of 150kHz.
The internal clock is trimmed for 2.7
µs 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.
12-Bit, 300ksps Sampling
A/D Converters with Reference
Single 5V Supply, 300ksps, 12-Bit Sampling A/D Converter
FEATURES
DESCRIPTIO
APPLICATIO S
TYPICAL APPLICATIO
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
LTBiCMOS is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.


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