DataSheet.jp


Datasheet DS8500 PDF ( 特性, スペック, ピン接続図 )

部品番号 DS8500
部品説明 HART Modem
メーカ Maxim Integrated
ロゴ Maxim Integrated ロゴ 
プレビュー
Total 7 pages
		
11

No Preview Available !

DS8500 Datasheet, DS8500 PDF,ピン配置, 機能
DS8500
EVALUATION KIT AVAILABLE
HART Modem
General Description
The DS8500 is a single-chip modem with Highway
Addressable Remote Transducer (HART) capabilities. It
has been fully tested and verified and has received a
HART® Certificate of Registration. The device integrates
the modulation and demodulation of the 1200Hz/2200Hz
FSK signal, has very low power consumption, and
needs only a few external components due to the inte-
grated digital signal processing. The input signal is
sampled by an analog-to-digital converter (ADC), fol-
lowed by a digital filter/demodulator. This architecture
ensures reliable signal detection in noisy environments.
The output digital-to-analog converter (DAC) generates
a sine wave and provides a clean signal with phase-
continuous switching between 1200Hz and 2200Hz.
Low power is achieved by disabling the receive circuits
during transmit and vice versa. The DS8500 is ideal for
low-power process control transmitters.
Applications
4mA–20mA Loop-Powered Transmitters for
Temperature, Pressure, Flow, and Level
Measurement
HART Multiplexers
HART Modem Interface Connectivity
Benefits and Features
Single-Chip, Half-Duplex Modem Overlays 1200bps
FSK Digital Communication on Top of Installed
4mA–20mA Current Loop Infrastructure
Digital Signal Processing Provides Reliable Input
Signal Detection in Noisy Conditions
Standard Component 3.6864MHz Crystal Reduces
System Cost
Fully Tested and Verified as a HART-Registered
Modem IC
Integrated Solution Requires Minimal Power and
Space
2.7V to 3.6V Operating Voltage
285µA (max) Current Consumption
Space-Saving, 5mm x 5mm x 0.8mm, 20-Pin
TQFN Package
Few External Components Required
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS8500-JND+
-40°C to +85°C
20 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
HART is a registered trademark of the HART Communication
Foundation. Membership in the HART Communication
Foundation does not guarantee a product has been verified or
received a HART Registration Certificate.
Pin Configuration
TOP VIEW
15 14 13 12 11
DGND 16
MODE 17
DGND 18
D_OUT 19
D_IN 20
+
DS8500
*EP
10 XCEN
9 DGND
8 XTAL2
7 XTAL1
6 RTS
12345
*EXPOSED PAD.
THIN QFN
(5mm × 5mm)
19-7581; Rev 2; 4/15

1 Page



DS8500 pdf, ピン配列
DS8500
HART Modem
Pin Description
PIN NAME
1, 2 DVDD Digital Supply Voltage
FUNCTION
3, 9,
16, 18
DGND Digital Ground
4
RST Active-Low Reset, Digital Input/Output. This pin includes an internal pullup resistor and is driven low as an
output when an internal reset condition occurs.
Carrier Detect, Digital Output. A logic-high indicates a valid carrier detection on FSK_IN.
5 OCD OCD = 1 when FSK_IN amplitude is greater than 120mVP-P.
OCD = 0 when FSK_IN amplitude is less than 80mVP-P.
6 RTS Request to Send, Digital Input. When set high, the device is put into the demodulator mode. A logic-low
puts the device into modulator mode.
7 XTAL1 Crystal Pin or Input for External Clock at 3.6864MHz
8 XTAL2 Crystal Pin or Output of the Crystal Amplifier
External Clock Enable, Digital Input. When set high, this pin allows the user to drive an external clock
10 XCEN signal through XTAL1. When in this mode, XTAL2 should be left unconnected. An external crystal must be
connected between XTAL1 and XTAL2 when set low.
11 AVDD Analog Supply Voltage
12
FSK_OUT
FSK Out, Analog Output. Output of the modulator. Provides a phase-continuous, FSK-modulated output
signal (1200Hz and 2200Hz output frequencies) to the 4–20mA current loop interface circuit.
13 REF Reference, Analog Output. The internal voltage reference is provided as output. This pin must be
connected to a 0.1µF capacitor.
14
FSK_IN
FSK In, Analog Input. Input for the FSK-modulated HART receive signal from the 4–20mA current loop
interface circuit.
15 AGND Analog Ground
17 MODE This pin should be tied high for HART applications. This pin can also be tied low for support of legacy
designs.
19 D_OUT Digital Data Out, Digital Output. Output from the demodulator.
20 D_IN Digital Data In, Digital Input. Input to the modulator.
— EP Exposed Pad. Should be connected to ground (DGND, AGND).
Block Diagram
RST
DVDD DGND AGND
AVDD
XTAL1
XTAL2
XCEN
OCD
MODE
D_OUT
RTS
D_IN
CRYSTAL
OSCILLATOR
CLOCK
GENERATOR
POWER
MONITOR
VREF
1.23V
Rx
DEMODULATOR
Tx
MODULATOR
DIGITAL
FILTER
DS8500
SAMPLE/HOLD
ADC
DAC
REF
FSK_IN
FSK_OUT
www.maximintegrated.com
Maxim Integrated | 3


3Pages


DS8500 電子部品, 半導体
DS8500
HART Modem
3.6864MHz
3.6864MHz
CRYSTAL
27pF
XTAL1
XTAL2
27pF
RST
MODE DVDD DGND
CRYSTAL
OSCILLATOR
CLOCK
GENERATOR
POWER
MONITOR
XCEN
OCD
D_OUT
Rx
DEMODULATOR
DIGITAL
FILTER
RTS
D_IN
MICROCONTROLLER
Tx
MODULATOR
DS8500
AGND
AVDD
POWER SUPPLY
2.7V TO 3.6V
VREF
1.23V
SAMPLE/HOLD
ADC
REF
R1
FSK_IN
C2
R2
C1
R3
C3
HART IN
C4
DAC
FSK_OUT
HART AND
4–20mA
OUT
4–20mA
DAC OUTPUT
Figure 4. Typical Application Circuit
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND
PATTERN NO.
20 TQFN
T2055+3
21-0140
90-0008
www.maximintegrated.com
Maxim Integrated | 6

6 Page





ページ 合計 : 7 ページ
PDF
ダウンロード
[ DS8500.PDF ]

共有リンク

Link :

おすすめデータシート

部品番号部品説明メーカ
DS850-3

There is a function of AC-DC / Distributed Power Front-End 1U.

Emerson
Emerson
DS850-3-002

There is a function of AC-DC / Distributed Power Front-End 1U.

Emerson
Emerson
DS850-5

There is a function of AC-DC / Distributed Power Front-End 1U.

Emerson
Emerson
DS850-9

There is a function of AC-DC / Distributed Power Front-End 1U.

Emerson
Emerson

多くを見つけるデータシート

部品番号部品説明メーカ
82S129

The 82S126 and 82S129 are field programmable, which means that custom patterns are immediately available by following the Signetics Generic fusing procedure. 1K-bit TTL Bipolar PROM, Address access time : 50ns max.

NXP
NXP
D1695

This part is a darlington connection NPN silicon epitaxial transistor. The 2SD1695 is a Darlington connection transistor and incorporates a dumper diode between the collector and emitter and a constant voltage diode and protection elements between the collector and base. This transistor is ideal for drives in solenoid and actuators.

NEC
NEC
FDMS86368

N-Channel Power Trench, 80V, 80A, 4.5mΩ.

Fairchild
Fairchild
2SC2456

Here is a Color TV Horizontal Driver, Vceo=300V, TO-126 Package.

Toshiba
Toshiba

www.DataSheet.jp    |   2018   |  メール    |   最新    |   Sitemap