AMC1210IRHAR [TI]
适用于 Δ-Σ 调制器的 4 通道数字滤波器
| RHA | 40 | -40 to 125;
| 型号： | AMC1210IRHAR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 适用于 Δ-Σ 调制器的 4 通道数字滤波器 | RHA | 40 | -40 to 125 信号电路 模拟IC |
| 文件： | 总9页 (文件大小：117K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
User's Guide
SBAU178–August 2010
AMC1204EVM
This user's guide describes the characteristics, operation, and use of the AMC1204EVM. The
AMC1204EVM is designed for prototyping and evaluation. A complete circuit description, schematic
diagram, and bill of materials are included.
The following related documents are available through the Texas Instruments web site at www.ti.com.
Device
Literature Number
SBAS512
AMC1204
AMC1210
SBAS372
Contents
1
2
AMC1204EVM Overview ................................................................................................... 2
1.1
1.2
Features ............................................................................................................. 2
Introduction ......................................................................................................... 2
Analog Interface ............................................................................................................. 2
2.1
Analog Inputs ....................................................................................................... 2
3
4
5
Digital Interface .............................................................................................................. 3
Power-Supplies .............................................................................................................. 4
EVM Set-up and Operation ................................................................................................ 4
5.1
5.2
Isolated Power and Analog Inputs: J1 and J4 .................................................................. 4
Device Operation ................................................................................................... 5
6
BOM, Schematic, and Layout ............................................................................................. 5
6.1
6.2
6.3
Schematic ........................................................................................................... 5
Printed Circuit Board Layout ...................................................................................... 5
Bill of Materials ..................................................................................................... 6
All trademarks are the property of their respective owners.
SBAU178–August 2010
1
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
AMC1204EVM Overview
www.ti.com
1
AMC1204EVM Overview
1.1 Features
AMC1204EVM:
•
•
•
Full-featured evaluation module for the AMC1204 single-channel, ΔΣ modulator
9-pin sub-D connector for interfacing to the AMC1210 digital filter evaluation module
Screw terminals for easy access to analog inputs
1.2 Introduction
The AMC1204 is a 1-bit modulator with an output buffer separated from the input interface circuitry by a
silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 4000 VPEAK
.
When used in combination with the AMC1210 or other digital filter, the AMC1204 can be used to achieve
16-bit analog-to-digital (A/D) conversion with no missing codes.
For use in high-resolution measurement applications, an effective accuracy of 14 bits can be obtained with
a digital filter bandwidth of 20 kHz at a modulator rate of 10 MHz.
Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with
the AMC1204EVM.
2
Analog Interface
The analog input to the AMC1204 is routed from a two-wire screw terminal screw at J4. This screw
terminal gives the user access to the inverting and noninverting inputs of the AMC1204.
2.1 Analog Inputs
The analog input to the AMC1204EVM board consists of simple R/C filter circuits. The input circuit for the
AMC1204 is shown in Figure 1.
R1
12
IN+
C3
330pF
R2
12
IN-
C4
10pF
C5
10pF
J4
2
1
ISOGND
Figure 1. AMC1204EVM Schematic: Analog Input Section
2
AMC1204EVM
SBAU178–August 2010
Copyright © 2010, Texas Instruments Incorporated
www.ti.com
Digital Interface
3
Digital Interface
The AMC1204EVM is designed for use with digital filters such as the AMC1210. The output and power for
the AMC1204 are routed to a 9-pin, female D-type connector. Both the analog and digital power for the
AMC1204, as well as the modulator data and clock outputs from the device under test, are routed to J2,
as Figure 2 illustrates.
VDD2
J3
1
VDD2
VDD2
2
3
4
C1
0.1mF
C2
4.7mF
14
13
11
16
9
1
6
2
7
3
8
4
9
5
VDD2
CLKIN
DATA
J2
GND2
GND1
W1
W2
Figure 2. Power and Digital Outputs
Connector J3 and jumpers W1 and W2 can be used to connect up to two AMC1204EVMs together,
providing power, CLKIN, and DATA signals to the AMC1210 filter chip using a single 9-pin, female, D-type
connector.
3
SBAU178–August 2010
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
Power-Supplies
www.ti.com
4
Power-Supplies
J2 provides access to the +5 VA for the VDD2 supply. All power to the board should be sourced from a
well-regulated, linear supply that has current limiting capabilities. Power is to be applied through J2.
Table 1 describes the pinout for J2.
Table 1. J2: Power Supply and Digital Outputs
Signal
Ground
Pin Number
Signal
1
3
5
7
9
2
4
6
8
Not used
Not used
4.5 to 5.5 VDD2 supply
Ground
Optional CLKIN output
DATA default
CLKIN default
Optional DATA output
For standalone operation, power sources can also be applied via a mating connector to J2, and the digital
output data stream can be wired directly to an FPGA or other digital filter module for further processing.
Refer to Figure 2 or the schematic appended to the end of this document for additional details.
5
EVM Set-up and Operation
This section describes the general operation of the AMC1204EVM.
5.1 Isolated Power and Analog Inputs: J1 and J4
The isolated power input to the AMC1204EVM printed circuit board (PCB) can be applied directly to J1,
pins 1 and 2. Table 2 lists the details of J1.
Table 2. J1: Isolated Power
Pin Number
J1.1
Signal
ISOGND
5 VISO
Description
Connection to the AMC1204 GND1 pin
Connection to the AMC1204 VDD1 terminal
J1.2
The analog input to the AMC1204EVM PCB can be applied directly to J4 pins 1 and 2. Table 3 lists the
details of J4.
CAUTION
Carefully review the AMC1204 product data sheet for the limitations of the
analog input range, and ensure that the appropriate analog/digital voltages are
applied before connecting any analog input to the EVM.
Table 3. J4: Analog Inputs
Pin Number
J4.1
Signal
CHA+
CHA–
Description
Noninverting analog input to the AMC1204
Inverting input to the AMC1204
J4.2
4
AMC1204EVM
SBAU178–August 2010
Copyright © 2010, Texas Instruments Incorporated
www.ti.com
BOM, Schematic, and Layout
5.2 Device Operation
Once the analog and digital power sources are applied to the AMC1204EVM, the digital outputs become
active upon the application of an external modulator clock source. The internal reference of the AMC1204
is used as the conversion reference.
Additionally, an analog input signal may be applied directly at screw terminal J1. See Figure 1 and Table 3
for more details. The analog input range, (VIN+) – (VIN–), is ±320 mV.
As the input voltage approaches the maximum input level of +320mV, the 1s density of the modulator
output approaches 92%. Likewise, when the input voltage approaches the lower limit of –320 mV, the 1s
density is approximately 8%.
6
BOM, Schematic, and Layout
This section contains the complete bill of materials, schematic diagram, and PCB layout for the
AMC1204EVM.
NOTE: Board layouts are not to scale. These are intended to show how the board is laid out; they
are not intended to be used for manufacturing AMC1204EVM PCBs.
6.1 Schematic
The AMC1204EVM schematic is appended to this document.
6.2 Printed Circuit Board Layout
Figure 3. AMC1204EVM Silk Screen Drawing
5
SBAU178–August 2010
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
BOM, Schematic, and Layout
www.ti.com
6.3 Bill of Materials
Table 4. AMC1204EVM Bill of Materials
Reference Designator
Description
Manufacturer
Mfr Part Number
C1608X7R1H104K
C1, C6
C2, C7
C3
Capacitor, ceramic 0.10 mF 50 V X7R 10% 0603
Capacitor, ceramic 4.7 mF 25 V X5R 0805
Capacitor, ceramic 330 pF 50 V C0G 5% 0603
Capacitor, ceramic 10 pF 50 V C0G 0603
Not installed
TDK
TDK
C2012X5R1E475K
C1608C0G1H331J
TDK
C4, C5
D1
TDK
C1608C0G1H100D
—
—
J1, J4
J2
Terminal block 3.5 mm 2-pos PCB
Connector, DB-9 female solder cup tin
4-pin, single row header
On Shore
Norcomp
Samtec
Yageo
Yageo
—
ED555/2DS
172-009-202R001
TSW-104-07-L-S
RC0603FR-0712RL
RC0603JR-070RL
—
J3
R1, R2
R3
Resistor, 12.0 Ω 1/10 W 1% 0603 SMD
Resistor, 0..0 Ω 1/10 W 5% 0603 SMD
Not installed, solder short pins 1 and 2
IC Delta-Sigma Mod 1bit 8-SOP
W1, W2
U1
TI
AMC1204DW
6
AMC1204EVM
SBAU178–August 2010
Copyright © 2010, Texas Instruments Incorporated
1
2
3
4
REVISION HISTORY
ENGINEERING CHANGE NUMBER
REV
APPROVED
D
C
B
A
D
C
B
A
VDD1
5Viso
J1
VDD2
R3
J3
2
1
0
1
C7
4.7uF
D1
5.1V
2
3
4
OST_ED-1514
VDD2
C2
GND
HEADER-4
GND
4.7uF
5Viso
1
6
2
7
3
8
4
9
5
C6
VDD2
C1
U1
VDD1
J2
RS232
R1
0.1uF
1
2
3
4
8
14
13
11
16
9
GND
VDD2
CLKIN
DATA
GND2
GND1
J4
12
0.1uF
IN+
C3
330pF
2
1
IN-
OST_ED-1514
R2
12
GND1
GND1
AMC1204DW
W1
2MM-3
W2
2MM-3
GND
C4
10pF
C5
10pF
GND
ti
12500 TI Blvd, Dallas, TX 75243
Precision Analog
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
TITLE
ENGINEER Tom Hendrick
DRAWN BY Tom Hendrick
DOCUMENT CONTROL NO.TBD
AMC1204EVM
SIZE A
DATE 05AUG10
REV A
SHEET
1
OF
1
FILE C:\Userdata\EVMS\AMC1204\AMC1204.ddb - Documents\SCH\AMC1204
1
2
3
4
Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the
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Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 0V to 5V and the output voltage range of 0V to 5V.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than +30°C. The EVM is designed to
operate properly with certain components above +30°C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
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