LTC1412IG Linear Technology, LTC1412IG Datasheet

IC A/D CONV 12BIT SAMPLNG 28SSOP

LTC1412IG

Manufacturer Part Number
LTC1412IG
Description
IC A/D CONV 12BIT SAMPLNG 28SSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1412IG

Number Of Bits
12
Sampling Rate (per Second)
3M
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
220mW
Voltage Supply Source
Dual ±
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SSOP (0.200", 5.30mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1412IG#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIONS
FEATURES
TYPICAL
, LTC and LT are registered trademarks of Linear Technology Corporation.
Telecommunications
Digital Signal Processing
Mulitplexed Data Acquisition Systems
High Speed Data Acquisition
Spectrum Analysis
Imaging Systems
Sample Rate: 3Msps
72dB S/(N + D) and 82dB SFDR at Nyquist
Power Dissipation: 150mW
External or Internal Reference Operation
True Differential Inputs Reject Common Mode Noise
40MHz Full Power Bandwidth Sampling
No Pipeline Delay
28-Pin SSOP Package
COMP
10 F
V
A
A
0.35LSB INL and 0.25LSB DNL (Typ)
2.5V Bipolar Input Range
REF
IN
IN
+
10 F
LTC1412
APPLICATION
BUFFER
S/H
– 5V
4.0625V
U
2k
V
SS
REFERENCE
2.5V
AGND
12-BIT ADC
10 F
U
TIMING AND
AV
LOGIC
DD
12
DGND
5V
DV
DD
BUFFERS
OUTPUT
OV
OGND
DD
OPTIONAL
3V LOGIC
SUPPLY
D11 (MSB)
D0 (LSB)
BUSY
CS
CONVST
1412 TA01
DESCRIPTION
The LTC
verter. This high performance device includes a high
dynamic range sample-and-hold and a precision refer-
ence. Operating from 5V supplies it draws only 150mW.
The 2.5V input range is optimized for low noise and low
distortion. Most high performance op amps also perform
best over this range, allowing direct coupling to the analog
inputs and eliminating the need for special translation
circuitry. Outstanding AC performance includes 72dB
S/(N + D) and 82dB SFDR at the Nyquist input frequency
of 1.5MHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 40MHz
bandwidth. The 60dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source.
The ADC has a high speed 12-bit parallel output port. There
is no pipeline delay in the conversion results. A separate
convert start input and converter status signal (BUSY)
ease connections to FIFOs, DSPs and microprocessors. A
digital output driver power supply pin allows direct con-
nection to 3V logic.
Sampling A/D Converter
®
1412 is a 12-bit, 3Msps, sampling A/D con-
Effective Bits and Signal-to-Noise + Distortion
12
10
8
6
4
2
0
1k
U
vs Input Frequency
10k
INPUT FREQUENCY (Hz)
100k
12-Bit, 3Msps,
1M
LTC1412
1412 G01
10M
74
68
62
56
1

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LTC1412IG Summary of contents

Page 1

... Bipolar Input Range No Pipeline Delay 28-Pin SSOP Package U APPLICATIONS Telecommunications Digital Signal Processing Mulitplexed Data Acquisition Systems High Speed Data Acquisition Spectrum Analysis Imaging Systems , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION 10 F LTC1412 + A IN S/H 12-BIT ADC – ...

Page 2

... With internal reference (Notes 5, 6) CONDITIONS (Note 7) (Note OUT(REF) CONDITIONS 4.75V V 5.25V, – 5.25V High Between Conversions During Conversions – – 2.5V < < 2. INFORMATION ORDER PART TOP VIEW NUMBER LTC1412CG LTC1412IG 4 25 BUSY CONVST 7 OGND DGND PACKAGE = 110 MIN TYP MAX 12 0. ...

Page 3

ACCURACY SYMBOL PARAMETER S/( Signal-to-Noise Plus Distortion Ratio THD Total Harmonic Distortion SFDR Spurious Free Dynamic Range IMD Intermodulation Distortion Full Power Bandwidth Full Linear Bandwidth TER AL REFERE ...

Page 4

LTC1412 CHARACTERISTICS SYMBOL PARAMETER f Maximum Sampling Frequency SAMPLE(MAX) t Throughput Time (Acquisition + Conversion) THROUGHPUT t Conversion Time CONV t Acquisition Time ACQ CONVST Setup Time 1 t CONVST Low Time ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS S/( and Effective Number of Bits vs Input Frequency 10k 100k 1M 10M INPUT FREQUENCY (Hz) 1412 G01 Spurious-Free Dynamic Range vs Input ...

Page 6

LTC1412 W U TYPICAL PERFOR A CE CHARACTERISTICS Power Supply Feedthrough vs Ripple Frequency 0 – 20 – 40 – – 80 –100 –120 1k 10k 100k 1M RIPPLE FREQUENCY (Hz PIN FUNCTIONS + ...

Page 7

U U FUNCTIONAL BLOCK DIAGRA + A IN – REF REF AMP REFCOMP (4.06V) AGND DGND TEST CIRCUITS Load Circuits for Access Timing DBN DBN HI AND ...

Page 8

LTC1412 U U APPLICATIONS INFORMATION + C SAMPLE SAMPLE + A IN HOLD ZEROING SWITCHES – C SAMPLE SAMPLE – HOLD + C DAC + – C DAC + V DAC – – V DAC 12 SAR Figure ...

Page 9

U U APPLICATIONS INFORMATION 10k 100k INPUT FREQUENCY (Hz) Figure 3. Effective Bits and Signal/(Noise + Distortion) vs Input Frequency Total Harmonic Distortion Total Harmonic Distortion (THD) is the ratio of the ...

Page 10

... DC accuracy and settling time are most critical. The following list is a summary of the op amps that are suitable for driving the LTC1412. More detailed information is available in the Linear Technology Databooks and on the LinearView ® LT 1223: 100MHz Video Current Feedback Amplifier ...

Page 11

U U APPLICATIONS INFORMATION width of the sample-and-hold circuit is 40MHz. Any noise or distortion products that are present at the analog inputs will be summed over this entire bandwidth. Noisy input circuitry should be filtered prior to the analog ...

Page 12

LTC1412 U U APPLICATIONS INFORMATION ANALOG INPUT OUT LT1019A-2 Figure 8b. Using the LT1019-2 External Reference The V pin can be driven with a DAC or other means REF shown in Figure ...

Page 13

U U APPLICATIONS INFORMATION – ANALOG INPUT 24k R1 50k R4 100 R5 R2 47k 50k R6 24k 10 F Figure 11b. Offset and Full-Scale Adjust Circuit + – 0.61mV (i.e., – 0.5LSB and adjust the ...

Page 14

LTC1412 U U APPLICATIONS INFORMATION ...

Page 15

... APPLICATIONS INFORMATION Figure 13c. Component Side Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Figure 13b ...

Page 16

... High Speed Serial I/O in SO-8 Package 0.397 – 0.407* (10.07 – 10.33 0.301 – 0.311 (7.65 – 7.90 0.068 – 0.078 (1.73 – 1.99) 0.002 – 0.008 (0.05 – 0.21) G28 SSOP 0694 sn1412 1412fs LT/TP 0798 4K • PRINTED IN LINEAR TECHNOLOGY CORPORATION 1998 USA ...

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