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參數(shù)資料
| 型號： | TC3405VQRTR |
| 元件分類： | ADC |
| 英文描述： | 4-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 453K |
| 代理商： | TC3405VQRTR |
2002 Microchip Technology Inc.
DS21414B-page 1
TC3405
Features
16-bit Resolution at Eight Conversions Per
Second, Adjustable Down to 10-bit Resolution at
512 Conversions Per Second
1.8V – 5.5V Operation, Low Power Operating
250
A; Sleep: 35A
microPort Serial Bus Requires only two
Interface Lines
Uses Internal or External Reference
Automatically Enters Sleep Mode when not in use
One Differential and Three Single-ended Inputs
with Built-In Multiplexer
VDD Monitor and Reset Generator Operational in
Shutdown Mode
Applications
Consumer Electronics, Thermostats, CO
Monitors, Humidity Meters, Security Sensors
Embedded Systems, Data Loggers,
Portable Equipment
Medical Instruments
Device Selection Table
Package Type
General Description
The TC3405 is a low cost, low power analog-to-digital
converter based on Microchip’s Sigma-Delta technol-
ogy. It will perform 16-bit conversions (15-bit plus sign)
at up to eight per second. The TC3405 is optimized for
use as a microcontroller peripheral in low cost, battery
operated systems. A voltage reference is included, or
an external reference can be used. A VDD monitor with
a reset generator provides Power-on Reset and Brown-
out protection while an extra threshold detector is suit-
able for use as an early warning power fail detector, or
as a Wake-up Timer.
The TC3405’s 2-wire microPort digital interface is
used for starting conversions and for reading out the
data. Driving the SCLK line low starts a conversion.
After the conversion starts, each additional falling edge
(up to six) detected on SCLK for t4 seconds reduces
the A/D resolution by one bit and cuts conversion time
in half. After a conversion is completed, clocking the
SCLK line puts the MSB through LSB of the resulting
data word onto the SDAT line, much like a shift register.
The part automatically sleeps when not performing a
data conversion.
TheTC3405isavailableina16-PinPDIPanda16-Pin
QSOP package.
Part
Number
Package
Temperature
Range
TC3405VPE
16-Pin PDIP (Narrow)
0
°Cto +85°C
TC3405VQR
16-Pin QSOP Narrow)
0
°Cto +85°C
16-Pin PDIP
16-Pin QSOP
1
16
215
314
413
512
611
710
IN4
89
IN1-
IN2
REFIN
GND
A0
VDD
SDAT
REFOUT
TC3405
SCLK
A1
RESET
VTH
IN3
ENABLE
IN1+
16-Bit, Low Cost, Low Power Sigma-Delta A/D Converter
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