LTC1404IS8 Linear Technology, LTC1404IS8 Datasheet

IC A/D CONV 12BIT W/SHTDN 8-SOIC

LTC1404IS8

Manufacturer Part Number
LTC1404IS8
Description
IC A/D CONV 12BIT W/SHTDN 8-SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1404IS8

Number Of Bits
12
Sampling Rate (per Second)
600k
Data Interface
MICROWIRE™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
160mW
Voltage Supply Source
Dual ±
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1404IS8#PBF
Manufacturer:
Linear Technology
Quantity:
135
Part Number:
LTC1404IS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Single 5V Supply, 600kHz, 12-Bit Sampling A/D Converter
Complete 12-Bit ADC in SO-8
Single Supply 5V or
Sample Rate: 600ksps
Power Dissipation: 75mW (Typ)
72dB S/(N + D) and – 80dB THD at Nyquist
No Missing Codes over Temperature
Nap Mode with Instant Wake-Up: 7.5mW
Sleep Mode: 60µW
High Impedance Analog Input
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
High Speed Data Acquisition
Digital Signal Processing
Multiplexed Data Acquisition Systems
Audio and Telecom Processing
Digital Radio
Spectrum Analysis
Low Power and Battery-Operated Systems
Handheld or Portable Instruments
ANALOG INPUT
(0V TO 4.096V)
REF
2.43V
OUT
10µF
*AVX TPSD106M035R0300
+
+
5V
10µF*
TM
Compatible)
U
0.1µF
0.1µF
±
5V Operation
V
A
V
GND
CC
IN
REF
LTC1404
U
CONV
D
CLK
V
OUT
SS
DATA LINK
SERIAL
LTC1404 • TA01
MPU
P1.4
P1.3
P1.2
DESCRIPTIO
The LTC
verter which draws only 75mW from 5V or ± 5V supplies.
This easy-to-use device comes complete with a 160ns
sample-and-hold and a precision reference. Unipolar and
bipolar conversion modes add to the flexibility of the ADC.
The LTC1404 has two power saving modes: Nap and
Sleep. In Nap mode, it consumes only 7.5mW of power
and can wake up and convert immediately. In the Sleep
mode, it consumes 60µW of power typically. Upon power-
up from Sleep mode, a reference ready (REFRDY) signal
is available in the serial data word to indicate that the
reference has settled and the chip is ready to convert.
The LTC1404 converts 0V to 4.096V unipolar inputs from
a single 5V supply and ±2.048V bipolar inputs from ±5V
supplies. Maximum DC specs include ±1LSB INL, ±1LSB
DNL and 45ppm/°C full-scale drift over temperature.
Guaranteed AC performance includes 69dB S/(N + D)
and – 76dB THD at an input frequency of 100kHz over
temperature.
The 3-wire serial port allows compact and efficient data
transfer to a wide range of microprocessors, microcontrollers
and DSPs.
All other trademarks are the property of their respective owners.
600ksps ADC with Shutdown
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
1404 is a complete 600ksps, 12-bit A/D con-
0.001
0.01
Complete SO-8, 12-Bit,
100
0.1
10
1
Power Consumption vs Sample Rate
0.01
U
0.1
NORMAL CONVERSION
BETWEEN CONVERSION
1
SAMPLE RATE (Hz)
10
NAP MODE
SLEEP MODE
BETWEEN CONVERSION
100
1k
9.6MHz CLOCK
10k 100k
LTC1404 • TA02
LTC1404
1M
1404fa
1

Related parts for LTC1404IS8

LTC1404IS8 Summary of contents

Page 1

... THD at an input frequency of 100kHz over temperature. The 3-wire serial port allows compact and efficient data transfer to a wide range of microprocessors, microcontrollers and DSPs. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners MPU CONV P1 ...

Page 2

... CC + 0.3V) CC ORDER PART NUMBER – 0.3V) to 12V SS LTC1404CS8 LTC1404IS8 + 0.3V 0.3V) CC Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...

Page 3

U CO VERTER C HARA TERISTICS C range, unless otherwise noted specifications are at T otherwise specified (Note 6). PARAMETER Resolution (No Missing Codes) Integral Linearity Error Differential Linearity Error Offset Error Full-Scale Error Full-Scale Tempco ...

Page 4

LTC1404 U U DIGITAL I PUTS AND OUTPUTS range, unless otherwise noted specifications are at T SYMBOL PARAMETER I Hi-Z Output Leakage D OZ OUT C Hi-Z Output Capacitance D OZ OUT I Output Source Current SOURCE I Output Sink ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Unipolar Mode Differential Nonlinearity vs Output Code 1. 600kHz SAMPLE 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 512 1024 1536 2048 2560 3072 3584 OUTPUT CODE 1404 G01 Bipolar Mode Integral ...

Page 6

LTC1404 W U TYPICAL PERFORMANCE CHARACTERISTICS Unipolar Mode Distortion vs Input Frequency 600kHz SAMPLE –10 –20 –30 –40 –50 –60 2ND HARMONIC –70 THD –80 –90 3RD HARMONIC –100 10 100 INPUT FREQUENCY (kHz) Unipolar Mode Intermodulation ...

Page 7

W U TYPICAL PERFORMANCE CHARACTERISTICS Unipolar Mode S/( Input Frequency and Amplitude 0dB –20dB –60dB 600kHz SAMPLE 0 ...

Page 8

LTC1404 W U TYPICAL PERFORMANCE CHARACTERISTICS Unipolar Mode Temperature 600kHz SAMPLE 0 –50 – TEMPERATURE (° PIN FUNCTIONS V (Pin 1): Positive Supply, 5V. Bypass to ...

Page 9

U U FUNCTIONAL BLOCK DIAGRA REF CLK CONTROL LOGIC CONV TEST CIRCUITS D OUT 3k Hi SAMPLE 2.43V REF 12-BIT CAPACITIVE DAC 12 SUCCESSIVE APPROXIMATION REGISTER/PARALLEL TO SERIAL CONVERTER ...

Page 10

LTC1404 U U APPLICATIONS INFORMATION Conversion Details The LTC1404 uses a successive approximation algorithm and an internal sample-and-hold circuit to convert an analog signal to a 12-bit serial output based on a precision internal reference. The control logic provides easy ...

Page 11

U U APPLICATIONS INFORMATION Signal-to-Noise Ratio The signal-to-noise plus distortion ratio [S/(N + D)] is the ratio between the RMS amplitude of the fundamental input frequency to the RMS amplitude of all other frequency components at the A/D output. The ...

Page 12

... The following list is a summary of the op amps that are 1404 F05 suitable for driving the LTC1404, more detailed informa- tion is available in the Linear Technology databooks or the Linear Technology Web site. LT 1215/LT1216: Dual and quad 23MHz, 50V/µs single supply op amps. Single 5V to ±15V supplies, 6.6mA specifications, 90ns settling to 0.5LSB. LT1223: 100MHz video current feedback amplifier. ± ...

Page 13

U U APPLICATIONS INFORMATION LT1229/LT1230: Dual and quad 100MHz current feedback amplifiers. ±2V to ±15V supplies, 6mA supply current each amplifier. Low noise. Good AC specs. LT1360: 37MHz voltage feedback amplifier. ±5V to ±15V supplies. 3.8mA supply current. Good AC ...

Page 14

LTC1404 U U APPLICATIONS INFORMATION 1LSB = FS 4.096 111...111 = 4096 4096 111...110 111...101 111...100 UNIPOLAR ZERO 000...011 000...010 000...001 000...000 0V 1 LSB INPUT VOLTAGE (V) Figure 8. LTC1404 Unipolar Transfer Characteristics 011...111 BIPOLAR 011...110 ZERO 000...001 000...000 ...

Page 15

U U APPLICATIONS INFORMATION BOARD LAYOUT AND BYPASSING To obtain the best performance from the LTC1404, a printed circuit board is required. Layout for the printed circuit board should ensure that digital and analog signal lines are separated as much ...

Page 16

LTC1404 U U APPLICATIONS INFORMATION inputs must be within 500mV of the supply rails). In Sleep mode, power consumption is reduced to 60µW by cutting off power to all internal circuitry including the reference. Figure 12 illustrates power-down modes for ...

Page 17

U U APPLICATIONS INFORMATION CLK t 4 CONV t 6 INTERNAL SAMPLE S/H STATUS Hi-Z D REFRDY D11 OUT CLK OUT ...

Page 18

LTC1404 U TYPICAL APPLICATIONS Hardware Interface to the TMS320C50’s TDM Serial Port (Frame Sync is Generated from TFSX) + 10µF Logic Analyzer Waveforms Show 2.05µs Throughput Rate (Input Voltage = 1.606V, Output Code = 0110 0100 0110 = 1606 NOTE: ...

Page 19

U TYPICAL APPLICATIONS THIS PROGRAM DEMONSTRATES THE LTC1404 INTERFACE TO THE TMS320C50. FRAME SYNC PULSE IS GENERATED FROM TFSX. DATA SHIFT CLOCK IS EXTERNALLY GENERATED. *Initialization* .mmregs ; Defines global symbolic names ;- - Initialized data memory to zero .ds ...

Page 20

LTC1404 U TYPICAL APPLICATIONS LTC1404 Interface to the ADSP2181’s SPORT0 (Frame Sync is Generated from RFS0) + 10µF Logic Analyzer Waveforms Show 1.67µs Throughput Rate (Input Voltage = 1.604V, Output Code = 0110 0100 0100 = 1604 NOTE: WITHOUT THE ...

Page 21

U TYPICAL APPLICATIONS THIS PROGRAM DEMONSTRATES THE LTC1404 INTERFACE TO THE ADSP-2181. FRAME SYNC PULSE IS GENERATED FROM RFS. DATA SHIFT CLOCK IS EXTERNALLY GENERATED. /*Section 1: Initialization*/ .module/ram/abs = 0 adspltc; /*define the program module*/ jump start; /*jump over ...

Page 22

LTC1404 U TYPICAL APPLICATIONS Quick Look Circuit for Converting Data to Parallel Format 10µF 0.1µF ANALOG INPUT 2 (0V TO 4.096V) 2.43V 3 REFERENCE + OUTPUT 4 10µF 0.1µ CONV LTC1404 ...

Page 23

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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

... Input, MSOP-8 and SO-8 1.22mW, 1-/2-Channel Input, MSOP-8 and SO-8 4.25mW, 1-/2-Channel Input, MSOP-8 and SO-8 www.linear.com ● TMS320C50 TCLKX TCLKR TFSX TFSR TDR 1404 TA07 ADSP2181 6 SCLKO (8.3MHz) 7 RFSO 5 DR0 1404 TA06 LT 0506 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1998 1404fa ...

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