LTC1402CGN Linear Technology, LTC1402CGN Datasheet

IC ADC 12BIT 2.2MSPS SHDN 16SSOP

LTC1402CGN

Manufacturer Part Number
LTC1402CGN
Description
IC ADC 12BIT 2.2MSPS SHDN 16SSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1402CGN

Number Of Bits
12
Sampling Rate (per Second)
2.2M
Data Interface
MICROWIRE™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
150mW
Voltage Supply Source
Analog and Digital, Dual ±
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SSOP (0.150", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1402CGN
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1402CGN#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
BLOCK DIAGRA
APPLICATIO S
MICROWIRE is a trademark of National Semiconductor Corp.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Sample Rate: 2.2Msps
72dB S/(N + D) and –89dB THD at Nyquist
Power Dissipation: 90mW (Typ)
80MHz Full Power Bandwidth Sampling
No Missing Codes over Temperature
Available in 16-Pin Narrow SSOP Package
Single Supply 5V or 5V Operation
Nap Mode with Instant Wake-Up: 15mW
Sleep Mode: 10 W
True Differential Inputs Reject Common Mode Noise
Input Range (1mV/LSB): 0V to 4.096V or 2.048V
Internal Reference Can Be Overdriven Externally
3-Wire Interface to DSPs and Processors (SPI and
MICROWIRE
Telecommunications
High Speed Data and Signal Acquisition
Digitally Multiplexed Data Acquisition Systems
Digital Radio Receivers
Spectrum Analysis
Low Power and Battery-Operated Systems
Handheld or Portable Instruments
Imaging Systems
V
A
A
REF
IN
IN
+
10 F
10 F
GAIN
3
4
5
7
TM
LTC1402
Compatible)
U
AND-HOLD
SAMPLE-
10 F
64k
64k
–5V OR 0V
14
4.096V
V
W
SS
+
2
AGND1
REFERENCE
12-BIT ADC
2.048
1
6
AV
AGND2
DD
12
13
5V
DV
DGND
TIMING
LOGIC
DD
3V OR 5V
OUTPUT
BUFFER
11
9
Sampling ADC with Shutdown
OGND
OV
DD
1402 TA01
10
8
16
15
DESCRIPTIO
The LTC
verter. This high performance device includes a high dy-
namic range sample-and-hold and a precision reference.
It operates from a single 5V supply or dual 5V supplies
and draws only 90mW from 5V.
The versatile differential input offers a unipolar range of
4.096V and a bipolar range of 2.048V for dual supply
systems where high performance op amps perform best,
eliminating the need for special translation circuitry.
The high common mode rejection allows users to elimi-
nate ground loops and common mode noise by measuring
signals differentially from the source.
Outstanding AC performance includes 72dB S/(N + D) and
–93dB SFDR at the Nyquist input frequency of 1.1MHz
with dual 5V supplies and –84dB SFDR with a single 5V
supply.
The LTC1402 has two power saving modes: Nap and
Sleep. Nap mode consumes only 15mW of power and can
wake up and convert immediately. In Sleep mode, it
typically consumes 10 W of power. Upon power-up from
Sleep mode, a reference ready (REFRDY) signal is avail-
able in the serial data word to indicate that the reference
has settled and the chip is ready to convert.
The 3-wire serial port allows compact and efficient data
transfer to a wide range of microprocessors, microcon-
trollers and DSPs. A digital output driver power supply pin
allows direct connection to 3V or lower logic.
D
BIP/UNI
CONV
SCK
OUT
®
1402 is a 12-bit, 2.2Msps sampling A/D con-
Serial 12-Bit, 2.2Msps
5 Harmonic THD, 2nd, 3rd and SFDR
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
U
0
vs Input Frequency (Unipolar)
10
4
f
SAMPLE
THD
SFDR
2ND
3RD
= 2.22MHz
INPUT FREQUENCY (Hz)
10
5
10
6
LTC1402
1401 G05
10
7
1

Related parts for LTC1402CGN

LTC1402CGN Summary of contents

Page 1

... High Speed Data and Signal Acquisition Digitally Multiplexed Data Acquisition Systems Digital Radio Receivers Spectrum Analysis Low Power and Battery-Operated Systems Handheld or Portable Instruments Imaging Systems , LTC and LT are registered trademarks of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor Corp. W BLOCK DIAGRA ...

Page 2

... Unipolar Mode with BIP/UNI Low 4.75V V 5.25V DD – 5.25V Dual 5V Supply Single 5V Supply (Note 1MHz – 100MHz – INFORMATION ORDER PART TOP VIEW NUMBER 16 CONV 15 SCK LTC1402CGN LTC1402IGN 13 DGND PART MARKING 10 D OUT 9 OGND 1402 1402I GN PACKAGE = 125 C, = 150 MIN TYP MAX 12 0.35 1 ...

Page 3

U W DYNAMIC ACCURACY otherwise specifications are Bipolar mode with A SYMBOL PARAMETER CONDITIONS S/( Signal-to-Noise Plus 100kHz Input Signal Distortion Ratio 1.1MHz Input Signal THD Total Harmonic 100kHz First 5 Harmonics, Bipolar ...

Page 4

LTC1402 W U POWER REQUIRE E TS range, otherwise specifications are at T SYMBOL PARAMETER V Positive Supply Voltage DD V Negative Supply Voltage SS I Positive Supply Current DD I Negative Supply Current SS PD Power Dissipation W U ...

Page 5

ELECTRICAL CHARACTERISTICS + – Note 12: The absolute voltage at A and Note 13: If less than 7.3ns is allowed, the output data will appear one clock cycle later best for CONV to rise half ...

Page 6

LTC1402 W U TYPICAL PERFOR A CE CHARACTERISTICS Unipolar Mode Plots Run with a Single 5V Supply. V Sine Wave Spectrum Plot (Bipolar) 5V Supply 2222222.22Hz SAMPLE 109592.01Hz SINE –10 2048 SAMPLES –20 –30 ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Unipolar Mode Plots Run with a Single 5V Supply. V Positive Power Supply Rejection for V REF 4.095 4.090 4.085 4.080 4.075 4.070 4.065 4.5 4.75 5.0 5.25 5.5 5.75 V (V) DD ...

Page 8

LTC1402 PIN FUNCTIONS GAIN (Pin 7): Tie to AGND2 to set the reference voltage to 4.096V or tie set the reference voltage to 2.048V. REF (Note 4) BIP/UNI (Pin 8): Tie to logic low ...

Page 9

DIAGRA SCK t 4 CONV t 6 INTERNAL SAMPLE S/H STATUS OUT Hi-Z D REF D11 OUT SCK CONV NAP SLEEP V REF ...

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 LTC1402. More detailed information is avail- able in the Linear Technology Databooks and on the LinearView ® LT 1206: 60MHz Current Feedback Amplifier with Shut- down Pin (Amplifier Draws 200 A While in Shutdown) ...

Page 11

U U APPLICATIONS INFORMATION LT1630: Dual 30MHz Rail-to-Rail Voltage FB Amplifier. 2.7V to 15V supplies. Very high A 520ns settling to 0.5LSB for a 4V swing. THD and noise are – 93dB to 40kHz and below 1LSB to 320kHz (A ...

Page 12

LTC1402 U U APPLICATIONS INFORMATION INTERNAL REFERENCE The LTC1402 has an on-chip, temperature compensated, curvature corrected, bandgap reference that is factory trimmed to 2.048V connected internally to a reference amplifier, see Figure 4. The reference amplifier amplifies the ...

Page 13

U U APPLICATIONS INFORMATION 0 –10 – 20 – 30 – 40 – 50 – 60 –70 0 FREQUENCY (MHz) Figure 7. CMRR vs Input Frequency INPUT SPAN VERSUS REFERENCE VOLTAGE The differential input range has a voltage ...

Page 14

LTC1402 U U APPLICATIONS INFORMATION more than 0.25 inch long to the common reference. You may also choose to tie AGND2 (Pin 6) directly to a solid analog ground plane and eliminate all the 10 F capacitors at this pin. ...

Page 15

U U APPLICATIONS INFORMATION 0000 0000 0000 and 0000 0000 0001. For full-scale ad- justment in Figures 10a and 10b, apply an input voltage of + 2.0465V (FS – 1.5LSBs and adjust R5 until the IN output code ...

Page 16

LTC1402 U U APPLICATIONS INFORMATION 15mW. The internal reference remains powered in Nap mode. One or more rising edges at SCK wake up the LTC1402 for service very quickly, and CONV can start an accurate conversion within a clock cycle. ...

Page 17

U U APPLICATIONS INFORMATION edge of CONV. Please note the delay specification from SCK to a valid always guaranteed to be valid OUT OUT by the next rising edge of SCK. DIGITAL JITTER AT CONV (PIN ...

Page 18

LTC1402 U U APPLICATIONS INFORMATION HARDWARE INTERFACE TO TMS320C54x The LTC1402 is a serial output ADC whose interface has been designed for high speed buffered serial ports in fast digital signal processors (DSPs). Figure 14 shows an example of this ...

Page 19

U U APPLICATIONS INFORMATION ; *************************************************************************** ; Files: BSP2KB.ASM -> ; 2kbyte collection into DSKPlus TMS320C542 with Serial Port interface to LTC1402 ; first element at 1024, last element at 1023, two middle elements at 2047 and 0000 ; bipolar ...

Page 20

LTC1402 U U APPLICATIONS INFORMATION * This is an example of how to initialize the Buffered Serial Port (BSP). * The BSP is initialized to require an external CLK and FSX for * operation. The data format is 16-bits, burst ...

Page 21

U U APPLICATIONS INFORMATION ; The vectors in this table can be configured for processing external and ; internal software interrupts. The DSKplus debugger uses four interrupt ; vectors. These are RESET, TRAP2, INT2, and HPIINT NOT ...

Page 22

LTC1402 U TYPICAL APPLICATION Using Quad Cable Drivers/Receivers in Remote LTC1402 Applications In some applications, the host controller or main proces- sor may be located some distance from the sensor, the signal conditioning circuitry, and the ADC. In these appli- ...

Page 23

... 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 24

... C Drift, 0.5% Max Initial Accuracy 0.075% Initial Accuracy, 10ppm/ C Max Drift 3ppm/ C Drift, 0.05% Max Initial Accuracy SO-8 Package, 12-Bit Monotonic Overtemperature SO-8 Package, 2.7V to 5.5V Operation 0.5LSB DNL, SO-8 Package, Internal Reference 1402f LT/TP 0800 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 ...

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