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DS8500 データシート 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 

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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

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