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TC3405VQR Datasheet

  • TC3405VQR

  • 16-Bit, Low Cost, Low Power Sigma-Delta A/D Converter

  • 454.39KB

  • 16頁(yè)

  • MICROCHIP   MICROCHIP

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TC3405
16-Bit, Low Cost, Low Power Sigma-Delta A/D Converter
Features
鈥?16-bit Resolution at Eight Conversions Per
Second, Adjustable Down to 10-bit Resolution at
512 Conversions Per Second
鈥?1.8V 鈥?5.5V Operation, Low Power Operating
250碌A(chǔ); Sleep: 35碌A(chǔ)
鈥?microPort鈩?Serial Bus Requires only two
Interface Lines
鈥?Uses Internal or External Reference
鈥?Automatically Enters Sleep Mode when not in use
鈥?One Differential and Three Single-ended Inputs
with Built-In Multiplexer
鈥?V
DD
Monitor and Reset Generator Operational in
Shutdown Mode
Package Type
16-Pin PDIP
16-Pin QSOP
IN1+
IN1-
IN2
IN3
IN4
VTH
REFIN
GND
1
2
3
4
5
6
7
8
16
15
14
VDD
SCLK
A0
A1
RESET
ENABLE
SDAT
REFOUT
TC3405
13
12
11
10
9
Applications
鈥?Consumer Electronics, Thermostats, CO
Monitors, Humidity Meters, Security Sensors
鈥?Embedded Systems, Data Loggers,
Portable Equipment
鈥?Medical Instruments
General Description
The TC3405 is a low cost, low power analog-to-digital
converter based on Microchip鈥檚 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 V
DD
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鈥檚 2-wire microPort鈩?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 t
4
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.
The TC3405 is available in a 16-Pin PDIP and a 16-Pin
QSOP package.
Device Selection Table
Part
Number
TC3405VPE
Package
16-Pin PDIP (Narrow)
Temperature
Range
0擄C to +85擄C
0擄C to +85擄C
TC3405VQR 16-Pin QSOP Narrow)
2002 Microchip Technology Inc.
DS21414B-page 1
漏

TC3405VQR 產(chǎn)品屬性

  • Microchip

  • ADC（模數(shù)轉(zhuǎn)換器）

  • 1

  • 3, 1

  • Delta-Sigma

  • 0.4 KSPs

  • 16 bit

  • Voltage

  • 2-Wire, Serial

  • Yes

  • Internal, External

  • 5.5 V

  • 1.8 V

  • + 85 C

  • SMD/SMT

  • QSOP-16

  • 0 C

  • 6 V

  • 100

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