LTC1405IGN Linear Technology, LTC1405IGN Datasheet

IC ADC 12BIT 5MSPS SAMPLE 28SSOP

LTC1405IGN

Manufacturer Part Number
LTC1405IGN
Description
IC ADC 12BIT 5MSPS SAMPLE 28SSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1405IGN

Number Of Bits
12
Sampling Rate (per Second)
5M
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
145mW
Voltage Supply Source
Dual ±
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SSOP (0.150", 3.95mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1405IGN
Manufacturer:
LT
Quantity:
14
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LTC1405IGN
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1405IGN#PBF
Manufacturer:
Linear Technology
Quantity:
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Part Number:
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Manufacturer:
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Quantity:
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Part Number:
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FEATURES
APPLICATIO S
TYPICAL
All other trademarks are the property of their respective owners.
5Msps Sample Rate
Low Power Dissipation: 115mW
Single 5V Supply or ±5V Supplies
71.3dB S/(N + D) and 85dB SFDR at Nyquist
100MHz Full-Power Bandwidth Sampling
Input PGA
Integral Nonlinearity Error <0.35LSB
Differential Nonlinearity <0.25LSB
±2.048V, ±1.024V and ±0.512V Bipolar Input Range
Out-of-Range Indicator
True Differential Inputs with 75dB CMRR
Pin-Compatible 10Msps Version (LTC1420)
28-Pin Narrow SSOP Package
Telecommunications
Digital Signal Processing
Multiplexed Data Acquisition Systems
High Speed Data Acquisition
Spectral Analysis
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
SENSE
–A
V
+
V
A
REF
CM
IN
IN
1µF
1µF
1µF
APPLICATION
U
0V OR –5V
MODE SELECT
V
SS
5V
S/H
GAIN
1µF
U
GND
(PIN 6)
2.048V
PIPELINED 12-BIT ADC
DIGITAL CORRECTION
5V
REFERENCE
V
(PIN 7)
DD
2.5V
GND
(PIN 8)
LOGIC
1µF
GND
(PIN 24)
5V
V
(PIN 23)
DD
BUFFERS
OUTPUT
OV
OGND
DD
1µF
DESCRIPTIO
The LTC
that draws only 115mW 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 LTC1405 has a flexible input circuit that allows full-scale
input ranges of ±2.048V, ±1.024V and ±0.512V. The input
common mode range is rail-to-rail and a common mode
bias voltage 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
71.3dB S/(N + D) and 85dB SFDR at the Nyquist input fre-
quency of 2.5MHz.
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 sepa-
rate output logic supply allows direct connection to 3V
components.
1405 TA01
OPTIONAL 3V
LOGIC SUPPLY
OF
D11 (MSB)
D0 (LSB)
5MHz CLK
®
1405 is a 5Msps, 12-bit sampling A/D converter
U
–0.25
–0.50
–0.75
–1.00
1.00
0.75
0.50
0.25
0
0
Sampling ADC
Typical INL Curve
12-Bit, 5Msps,
1024
CODE
2048
LTC1405
3072
1405 TA02
4096
1405fa
1

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LTC1405IGN Summary of contents

Page 1

... Digital Signal Processing ■ Multiplexed Data Acquisition Systems ■ High Speed Data Acquisition ■ Spectral Analysis ■ Imaging Systems , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATION 5V 1µF GAIN A ...

Page 2

... GAIN = 0V REF V = 2.048V (SENSE = V ), GAIN = 5V REF REF V = 2.048V (SENSE = V ), GAIN = 0V REF REF External V (SENSE = 5V), GAIN = 5V REF External V (SENSE = 5V), GAIN = 0V REF Between Conversions During Conversions ORDER PART NUMBER 28 GAIN 27 OF LTC1405CGN 26 CLK LTC1405IGN GND OGND 80°C 25°C. A MIN TYP MAX UNITS ● ...

Page 3

LOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are 25°C. Specifications are guaranteed for both dual supply and single supply operation. (Note 5) ...

Page 4

LTC1405 U U DIGITAL I PUTS AND OUTPUTS temperature range, otherwise specifications are at T operation. (Note 5) SYMBOL PARAMETER I Digital Input Current IN C Digital Input Capacitance IN V High Level Output Voltage OH V Low Level Output ...

Page 5

ELECTRICAL CHARACTERISTICS Note 6: Dynamic specifications are guaranteed for dual supply operation with a single-ended + A input and – A grounded. For single supply IN IN dynamic specifications, refer to the Typical Performance Characteristics. Note 7: Integral nonlinearity is ...

Page 6

LTC1405 W U TYPICAL PERFORMANCE CHARACTERISTICS SFDR vs Input Frequency, Differential Input –50 DUAL SUPPLIES –55 ±2.048V RANGE GAIN = 1× – 0dBFS IN –65 –70 –75 –80 –85 –90 –95 –100 0 100 INPUT FREQUENCY ...

Page 7

CTIO (Pin 1): Positive Analog Input. IN – A (Pin 2): Negative Analog Input (Pin 3): 2.5V Reference Output.Optional input com- CM mon mode for single supply operation. Bypass to ...

Page 8

LTC1405 CTIO AL BLOCK DIAGRA – MODE SELECT SENSE V REF 0V OR – DIAGRA ANALOG INPUT CLK DATA OUTPUT ...

Page 9

U U APPLICATIO S I FOR ATIO Conversion Details The LTC1405 is a high performance 12-bit A/D converter that operates up to 5Msps complete solution with an on-chip sample-and-hold, a 12-bit pipelined CMOS ADC, a low drift ...

Page 10

LTC1405 U U APPLICATIO S I FOR ATIO An external reference or a DAC can be used to drive V over range (Figures 3a and 3b). The input impedance of the V pin is 2kΩ, so ...

Page 11

U U APPLICATIO S I FOR ATIO Table 2. Comparison of Analog Input Configurations SUPPLIES COUPLING V REF DC 4.096V ± 4.096V 5V DC 2.048V 5V DC 4.096V 5V DC 4.096V ±5V AC 4.096V (Transformer 4.096V ...

Page 12

LTC1405 U U APPLICATIO S I FOR ATIO Differential Operation The THD and SFDR performance of the LTC1405 can be improved by using a center tap RF transformer to drive the inputs differentially. Though the signal can no longer be ...

Page 13

U U APPLICATIO S I FOR ATIO Digital Outputs and Overflow Bit (OF) Figure 10 shows the ideal input/output characteristics for the LTC1405. The output data is two’s complement binary for all input ranges and for both single and dual ...

Page 14

LTC1405 U U APPLICATIO S I FOR ATIO are present. The SNR performance of an ADC when the performance is limited by jitter is given by: SNR = – 20log (2π ) where f is the ...

Page 15

U U APPLICATIO S I FOR ATIO W U LTC1405 1405fa 15 ...

Page 16

LTC1405 U U APPLICATIO S I FOR ATIO Figure 15. Top Silkscreen Layer for LTC1405/LTC1420 Demo Board Figure 16. Top Layer for LTC1405/LTC1420 Demo Board Figure 17. Ground Plane Layer for LTC1405/LTC1420 Demo Board 1405fa ...

Page 17

U U APPLICATIO S I FOR ATIO Figure 18. Power Plane Layer for LTC1405/LTC1420 Demo Board Figure 19. Bottom Layer for LTC1405/LTC1420 Demo Board W U LTC1405 1405fa 17 ...

Page 18

LTC1405 U TYPICAL APPLICATIO Single Supply, 5Msps, 12-Bit ADC with 3V Logic Outputs 30Ω ANALOG INPUT (2.5V ± 1.024V) 1000pF 1µF 1µF 5V 1µF 30Ω ANALOG INPUT (±2.048V) 1000pF, NPO 1µF 1µF 5V 1µF 18 LTC1405 GAIN ...

Page 19

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 20

... SNR, 5mm x 5mm QFN 60mW, 74.4dB SNR, 5mm x 5mm QFN 75mW, 74dB SNR, 5mm x 5mm QFN 125mW, 74dB SNR, 5mm x 5mm QFN 210mW, 74dB SNR, 5mm x 5mm QFN LT/TP 1204 1K REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2000 TO PIN 7 1405fa ...

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