LTC1419AISW Linear Technology, LTC1419AISW Datasheet

IC A/D CONV 14BIT SAMPLNG 28SOIC

LTC1419AISW

Manufacturer Part Number
LTC1419AISW
Description
IC A/D CONV 14BIT SAMPLNG 28SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1419AISW

Number Of Bits
14
Sampling Rate (per Second)
800k
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
240mW
Voltage Supply Source
Dual ±
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SOIC (0.300", 7.50mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1419AISW#PBF
Manufacturer:
LT
Quantity:
560
Part Number:
LTC1419AISW#TRPBF
Manufacturer:
LT
Quantity:
560
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Sample Rate: 800ksps
Power Dissipation: 150mW
81.5dB S/(N + D) and 93dB THD
No Missing Codes
No Pipeline Delay
Nap and Sleep Shutdown Modes
Operates with 2.5V Internal 15ppm/°C
Reference or External Reference
True Differential Inputs Reject Common Mode Noise
20MHz Full-Power Bandwidth Sampling
Bipolar Input Range: ±2.5V
28-Pin SSOP and SO Packages
Telecommunications
Digital Signal Processing
Multiplexed Data Acquisition Systems
High Speed Data Acquisition
Spectrum Analysis
Imaging Systems
OUTPUT
1µF
2.50V
V
REF
(–2.5V TO 2.5V)
ANALOG INPUT
DIFFERENTIAL
PARALLEL
14-BIT
800kHz, 14-Bit Sampling A/D Converter
10µF
BUS
U
10
11
12
13
14
1
2
3
4
5
6
7
8
9
+A
–A
V
REFCOMP
AGND
D13(MSB)
D12
D11
D10
D9
D8
D7
D6
DGND
REF
IN
IN
LTC1419
U
CONVST
SHDN
BUSY
DV
AV
V
RD
CS
D0
D1
D2
D3
D4
D5
DD
DD
SS
28
27
26
25
24
23
22
21
20
19
18
17
16
15
µP CONTROL
LINES
–5V
10µF
1419 TA01
A/D Converter with Shutdown
5V
10µF
DESCRIPTIO
The LTC
A/D converter that draws only 150mW from ±5V supplies.
This easy-to-use device includes a high dynamic range
sample-and-hold and a precision reference. Two digitally
selectable power shutdown modes provide flexibility for
low power systems.
The LTC1419 has a full-scale input range of ±2.5V. Out-
standing AC performance includes 81.5dB S/(N + D) and
93dB THD with a 100kHz input; 80dB S/(N + D) and 86dB
THD at the Nyquist input frequency of 400kHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 20MHz
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 µP compatible, 14-bit parallel output port.
There is no pipeline delay in the conversion results. A
separate convert start input and data ready signal (BUSY)
ease connections to FIFOs, DSPs and microprocessors.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5581252.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
14-Bit, 800ksps Sampling
®
1419 is a 1µs, 800ksps, 14-bit sampling
Effective Bits and Signal-to-(Noise + Distortion)
14
13
12
11
10
9
8
7
6
5
4
3
2
1k
f
SAMPLE
U
= 800kHz
vs Input Frequency
INPUT FREQUENCY (Hz)
10k
100k
LTC1419
1M 2M
1419 TA02
86
80
74
68
62
1419fb
1

Related parts for LTC1419AISW

LTC1419AISW Summary of contents

Page 1

... There is no pipeline delay in the conversion results. A separate convert start input and data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5581252. ...

Page 2

... CS = High Between Conversions During Conversions – 2.5V < (– < 2. ORDER TOP VIEW PART NUMBER LTC1419ACG BUSY LTC1419ACSW LTC1419AIG 6 23 CONVST LTC1419AISW SHDN LTC1419CG LTC1419CSW LTC1419IG LTC1419ISW PACKAGE 28-LEAD PLASTIC SO = 125°C, θ = 95°C/W ( 125°C, θ = 130°C/W (SW) JA http://www.linear.com/leadfree/ ...

Page 3

ACCURACY otherwise specifications are 25°C. (Note 5) A SYMBOL PARAMETER S/( Signal-to-(Noise + Distortion) Ratio THD Total Harmonic Distortion SFDR Spurious Free Dynamic Range IMD Intermodulation Distortion Full-Power Bandwidth Full-Linear ...

Page 4

LTC1419 W U POWER REQUIRE E TS otherwise specifications are 25°C. (Note 5) A SYMBOL PARAMETER P Power Dissipation DIS Nap Mode Sleep Mode CHARACTERISTICS range, otherwise specifications are at T SYMBOL ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS S/( Input Frequency and Amplitude 0dB –20dB –60dB 10k 100k 1M 2M ...

Page 6

LTC1419 CTIO S (Pin 1): ±2.5V Positive Analog Input (Pin 2): ±2.5V Negative Analog Input. – (Pin 3): 2.5V Reference Output. Bypass to AGND REF with 1µF. REFCOMP (Pin ...

Page 7

TEST CIRCUITS Load Circuits for Access Timing DBN DBN (A) Hi APPLICATIONS INFORMATION CONVERSION DETAILS The LTC1419 uses a successive approximation algorithm and an internal sample-and-hold circuit to convert an analog signal ...

Page 8

LTC1419 U U APPLICATIONS INFORMATION frequencies outside the fundamental. Figure 2 shows a typical LTC1419 FFT plot SAMPLE f = 99.804687kHz IN – 20 SFDR = 98dB THD = –93.3dB – 40 – 60 – 80 –100 –120 ...

Page 9

U U APPLICATIONS INFORMATION 0 –10 –20 –30 –40 –50 –60 –70 –80 THD –90 –100 3RD – 110 1k 10k 100k INPUT FREQUENCY (Hz) Figure 4. Distortion vs Input Frequency Intermodulation Distortion If the ADC input signal consists of ...

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 LTC1419. More detailed informa- tion is available in the Linear Technology databooks, the TM LinearView CD-ROM and on our web site at www.linear- tech ...

Page 11

U U APPLICATIONS INFORMATION many applications. For example, Figure 7 shows a 1000pF capacitor from + A to ground and a 100Ω source resistor IN to limit the input bandwidth to 1.6MHz. The 1000pF capacitor also acts as a charge ...

Page 12

LTC1419 U U APPLICATIONS INFORMATION Differential Inputs The LTC1419 has a unique differential sample-and-hold circuit that allows rail-to-rail inputs. The ADC will always convert the difference – (– common mode voltage (see Figure 11a). The ...

Page 13

U U APPLICATIONS INFORMATION applied to the – A input. For zero offset error, apply IN – 152µV (i.e., – 0.5LSB and adjust the offset at the IN – A input until the output code flickers between ...

Page 14

LTC1419 U U APPLICATIONS INFORMATION 1419fb ...

Page 15

U U APPLICATIONS INFORMATION Figure 13b. Suggested Evaluation Circuit Board—Component Side Silkscreen Figure 13c. Suggested Evaluation Circuit Board—Component Side Layout W U LTC1419 1419fb 15 ...

Page 16

LTC1419 U U APPLICATIONS INFORMATION Figure 13d. Suggested Evaluation Circuit Board—Solder Side Layout DIGITAL INTERFACE The A/D converter is designed to interface with micropro- cessors as a memory mapped device. The CS and RD control inputs are common to all ...

Page 17

U U APPLICATIONS INFORMATION SHDN t 3 CONVST Figure 14b. SHDN to CONVST Wake-Up Timing Timing and Control Conversion start and data read operations are controlled by three digital inputs: CONVST, CS and RD. A logic “0” applied to the ...

Page 18

LTC1419 U U APPLICATIONS INFORMATION CONVST BUSY DATA (N – 1) DATA DB13 TO DB0 Figure 17. Mode 1b. CONVST Starts a Conversion. Data Outputs Always Enabled (CONVST = CONVST ...

Page 19

... FLASH SHALL NOT EXCEED 0.254mm (0.010") PER 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. ...

Page 20

... S28 (WIDE) 1098 ≤ 800ksps, 80mW Dissipation SAMPLE LT 0506 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1997 1419fb ...

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