JAJSGM3
December 2018
DAC8742H
PRODUCTION DATA.
1
特長
2
アプリケーション
3
概要
Device Images
概略回路図
4
改訂履歴
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
HART Modulator
7.3.2
HART Demodulator
7.3.3
FOUNDATION FIELDBUS / PROFIBUS PA Manchester Encoder
7.3.4
FOUNDATION FIELDBUS / PROFIBUS PA Manchester Decoder
7.3.5
Internal Reference
7.3.6
Clock Configuration
7.3.7
Reset and Power-Down
7.3.8
Full-Duplex Mode
7.3.9
I/O Selection
7.3.10
Jabber Inhibitor
7.4
Device Functional Modes
7.4.1
UART Interfaced HART
7.4.2
UART Interfaced FOUNDATION FIELDBUS / PROFIBUS PA
7.4.3
SPI Interfaced HART
7.4.4
SPI Interfaced FOUNDATION FIELDBUS / PROFIBUS PA
7.4.5
Interface
7.4.5.1
UART
7.4.5.1.1
UART Carrier Detect
7.4.5.2
SPI
7.4.5.2.1
SPI Cyclic Redundancy Check
7.4.5.2.2
SPI Interrupt Request
7.5
Register Maps
7.5.1
CONTROL Register (Offset = 2h) [reset = 0x8042]
Table 4.
CONTROL Register Field Descriptions
7.5.2
RESET Register (Offset = 7h) [reset = 0x0000]
Table 5.
RESET Register Field Descriptions
7.5.3
MODEM_STATUS Register (Offset = 20h) [reset = 0x0000]
Table 6.
MODEM_STATUS Register Field Descriptions
7.5.4
MODEM_IRQ_MASK Register (Offset = 21h) [reset = 0x0024]
Table 7.
MODEM_IRQ_MASK Register Field Descriptions
7.5.5
MODEM_CONTROL Register (Offset = 22h) [reset = 0x0048]
Table 8.
MODEM_CONTROL Register Field Descriptions
7.5.6
FIFO_D2M Register (Offset = 23h) [reset = 0x0200]
Table 9.
FIFO_D2M Register Field Descriptions
7.5.7
FIFO_M2D Register (Offset = 24h) [reset = 0x0200]
Table 10.
FIFO_M2D Register Field Descriptions
7.5.8
FIFO_LEVEL_SET Register (Offset = 25h) [reset = 0x0000]
Table 11.
FIFO_LEVEL_SET Register Field Descriptions
7.5.9
PAFF_JABBER Register (Offset = 27h) [reset = 0x0000]
Table 12.
PAFF_JABBER Register Field Descriptions
8
Application and Implementation
8.1
Application Information
8.1.1
Design Recommendations
8.1.2
Selecting the Crystal/Resonator
8.1.3
Included Functions and Filter Selection
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
DAC8742H HART Modem
8.2.2.2
2-Wire Current Loop
8.2.2.3
Regulator
8.2.2.4
DAC
8.2.2.5
Amplifiers
8.2.2.6
Diodes
8.2.2.7
Passives
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
デバイスおよびドキュメントのサポート
11.1
ドキュメントのサポート
11.1.1
関連資料
11.2
ドキュメントの更新通知を受け取る方法
11.3
コミュニティ・リソース
11.4
商標
11.5
静電気放電に関する注意事項
11.6
Glossary
12
メカニカル、パッケージ、および注文情報
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
PBS|32
MPQF027A
サーマルパッド・メカニカル・データ
PBS|32
QFND381
発注情報
jajsgm3_oa
jajsgm3_pm
6.7
Typical Characteristics
Figure 2.
HART Mode External Band-Pass Filter Response
Figure 4.
FF / PA Mode External Band-Pass Filter Response
Figure 6.
Internal Reference Voltage versus AVDD
Figure 8.
HART TX Carrier Start Time
Figure 10.
HART RX Carrier Detect Off Timing
Figure 12.
HART Mode IOVDD Supply Current versus Voltage with External Reference
Figure 14.
HART Mode IOVDD Supply Current versus Voltage with Internal Reference
Figure 16.
FF / PA Mode IOVDD Supply Current versus Voltage with External Reference
Figure 18.
FF / PA Mode IOVDD Supply Current versus Voltage with Internal Reference
Figure 20.
Typical Manchester Encoded Trapezoid, No Filter
Figure 22.
MOD_OUT Voltage versus R
LOAD
Figure 3.
HART Mode Internal Band-Pass Filter Response
Figure 5.
FF / PA Mode Internal Band-Pass Filter Response
Figure 7.
Internal Reference Voltage versus Temperature
Figure 9.
HART TX Carrier Stop / Decay Time
Figure 11.
HART RX Carrier Detect On Timing
Figure 13.
HART Mode AVDD Supply Current versus Voltage with External Reference
Figure 15.
HART Mode AVDD Supply Current versus Voltage with Internal Reference
Figure 17.
FF / PA Mode AVDD Supply Current versus Voltage with External Reference
Figure 19.
FF / PA Mode AVDD Supply Current versus Voltage with Internal Reference
Figure 21.
Typical Manchester Encoded Trapezoid, with Suggested Filter Response