參數(shù)資料
型號: LTC1420I
廠商: Linear Technology Corporation
英文描述: 14-Bit 200KSPS ADC Ser. Out, Auto PWRDN, Single Ended Input 8-MSOP -40 to 85
中文描述: 12位,10Msps的器件,采樣ADC
文件頁數(shù): 1/20頁
文件大小: 267K
代理商: LTC1420I
1
LTC1420
12-Bit, 10Msps,
Sampling ADC
The LTC
1420 is a 10Msps, 12-bit sampling A/D converter
that draws only 250mW from either single 5V or dual
±
5V
supplies. This easy-to-use device includes a high dynamic
range sample-and-hold, a precision reference and a PGA
input circuit.
The LTC1420 has a flexible input circuit that allows full-
scale input ranges of
±
2.048V
±
1.024V and
±
0.512V. The
input common mode voltage is arbitrary, though a 2.5V
reference is provided for single supply applications. The
input PGA has a digitally selectable 1x or 2x gain.
Maximum DC specs include
±
1LSB INL and
±
1LSB DNL
over temperature. Outstanding AC performance includes
71dB S/(N + D) and 83dB SFDR at the Nyquist input
frequency of 5MHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 100MHz
bandwidth. The 75dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source. A
separate output logic supply allows direct connection to
3V components.
I
10Msps Sample Rate
I
Single 5V Supply or
±
5V Supplies
I
Integral Nonlinearity Error <0.35LSB
I
Differential Nonlinearity <0.25LSB
I
71dB S/(N + D) and 83dB SFDR at Nyquist
I
100MHz Full-Power Bandwidth Sampling
I
±
2.048V,
±
1.024V and
±
0.512V Bipolar Input Range
I
Input PGA
I
Out-of-Range Indicator
I
True Differential Inputs with 75dB CMRR
I
Power Dissipation: 250mW
I
28-Pin Narrow SSOP Package
I
Telecommunications
I
Digital Signal Processing
I
Multiplexed Data Acquisition Systems
I
High Speed Data Acquisition
I
Spectral Analysis
I
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Typical INL Curve
CODE
0
1024
2048
3072
4096
I
1420 TA02
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
DIGITAL CORRECTION
LOGIC
OUTPUT
BUFFERS
1420 TA01
MODE SELECT
PIPELINED 12-BIT ADC
S/H
0V OR –5V
V
CM
GAIN
5V
V
DD
V
DD
OV
DD
28
7
23
22
21
OPTIONAL 3V
LOGIC SUPPLY
OF
D11 (MSB)
D0 (LSB)
CLK
27
10
20
26
10MHz CLK
DIGITAL
OUTPUT
SENSE
V
REF
–A
IN
+
A
IN
VIN
+
3
4
5
2
1
24
8
25
6
OGND
GND
GND
V
SS
GND
2.048V
2.5V
REFERENCE
1
μ
F
5V
5V
1
μ
F
1
μ
F
1
μ
F
1
μ
F
1
μ
F
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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