Datasheet > ADS-941MC

ADS-941MC

更新时间： 2024-01-31 02:24:51

品牌	Logo	应用领域
CANDD		转换器
页数	文件大小	规格书
6页	81K
描述
14-Bit, 1MHz Sampling A/D Converters

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技术参数
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ADS-941MC 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	DIP	包装说明：	DIP, DIP32,.9
针数：	32	Reach Compliance Code：	unknown
ECCN代码：	3A001.A.2.C	HTS代码：	8542.39.00.01
风险等级：	5.46	Is Samacsys：	N
最大模拟输入电压：	5 V	最小模拟输入电压：	-5 V
转换器类型：	ADC, PROPRIETARY METHOD	JESD-30 代码：	R-XDIP-T32
JESD-609代码：	e0	最大线性误差 (EL)：	0.012%
标称负供电电压：	-15 V	模拟输入通道数量：	1
位数：	12	功能数量：	1
端子数量：	32	最高工作温度：	125 °C
最低工作温度：	-55 °C	输出位码：	BINARY
输出格式：	PARALLEL, WORD	封装主体材料：	UNSPECIFIED
封装代码：	DIP	封装等效代码：	DIP32,.9
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	5,+-15 V
认证状态：	Not Qualified	采样速率：	1 MHz
座面最大高度：	4.9 mm	子类别：	Analog to Digital Converters
标称供电电压：	15 V	表面贴装：	NO
技术：	HYBRID	温度等级：	MILITARY
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	22.9 mm
Base Number Matches：	1

ADS-941MC 数据手册

ADS -9 4 1

TECHNICAL NOTES

1. Rated performance requires using good high-frequency

circuit board layout techniques. The analog and digital

grounds are not connected to each other internally. Avoid

ground-related problems by connecting the digital and

analog grounds to one point, the ground plane beneath the

converter. Due to the inductance and resistance of the

power supply return paths, return the analog and digital

ground separately to the power supplies.

tied low for straight binary/offset binary or between 00 0000

0000 0000 and 00 0000 0000 0001 with pin 8 tied high for

complementary binary/complementary offset binary.

Two's complement coding requires using pin 31. With pin 8

tied low, adjust the gain trimpot until the output code flickers

equally between 01 1111 1111 1110 and 01 1111 1111 1111.

4. To confirm proper operation of the device, vary the precision

reference voltage source to obtain the output coding listed

in Table 3.

2. Bypass the analog and digital supplies and the +10V REF.

OUT (pin 1) to ground with a 4.7µF, 25V tantalum electro-

lytic capacitor in parallel with a 0.1µF ceramic capacitor.

Table 1. Input Connections

3. CODING SELECT (pin 8) is compatible with CMOS/TTL

logic levels for those users desiring logic control of this

function. The device has an internal pull-up resistor on this

pin, allowing pin 8 to be connected to +5V or left open when

a logic 1 is needed. See the Calibration Procedure for

selecting an output coding.

INPUT RANGE

INPUT PIN

TIE TOGETHER

0 +10V

±5V

Pin 3

Pins 2 and 4

Pins 1 and 2

4. To enable the three-state outputs, connect ENABLE (pin 9)

to a logic "0" (low). To disable, connect pin 9 to a logic "1"

(high).

Table 2. Zero and Gain Adjustments

Input

Range

Zero Adjust

+1/2 LSB

Gain Adjust

FS – 1 1/2 LSB

CALIBRATION PROCEDURE

0 to +10V

±5V

+305µV

+9.999085V

+4.999085V

1. Connect the converter per Figure 3 and Table 1 for the

appropriate input range. Apply a pulse of 50 nanoseconds

minimum to START CONVERT (pin 32) at a rate of 200kHz.

This rate is chosen to reduce flicker if LED's are used on

the outputs for calibration purposes.

THERMAL REQUIREMENTS

2. Zero Adjustments

All DATEL sampling A/D converters are fully characterized and

specified over operating temperature (case) ranges of 0 to

+70°C and –55 to +125°C. All room-temperature (T^A= +25°C)

production testing is performed without the use of heat sinks or

forced-air cooling. Thermal impedance figures for each device

are listed in their respective specification tables.

Apply a precision voltage reference source between

ANALOG INPUT (pin 3) and SIGNAL GROUND (pin 4),

then adjust the reference source output per Table 2.

For unipolar operation, adjust the zero trimpot so that the

output code flickers equally between 00 0000 0000 0000

and 00 0000 0000 0001 with CODING SELECT (pin 8) tied

low (straight binary) or between 11 1111 1111 1111 and 11

1111 1111 1110 with pin 8 tied high (complementary binary).

These devices do not normally require heat sinks, however,

standard precautionary design and layout procedures should

be used to ensure devices do not overheat. The ground and

power planes beneath the package, as well as all pcb signal

runs to and from the device, should be as heavy as possible to

help conduct heat away from the package. Electrically-

insulating, thermally-conductive "pads" may be installed

underneath the package. Devices should be soldered to

boards rather than "socketed", and of course, minimal air flow

over the surface can greatly help reduce the package

temperature.

For bipolar operation, adjust the trimpot until the code

flickers equally between 10 0000 0000 0000 and 10 0000

0000 0001 with pin 8 tied low (offset binary) or between 01

1111 1111 1111 and 01 1111 1111 1110 with pin 8 tied high

(complementary offset binary).

Two's complement coding requires using BIT 1 OUT (MSB)

(pin 31). With pin 8 tied low, adjust the trimpot until the

code flickers between 00 0000 0000 0000 and 00 0000

0000 0001.

In more severe ambient conditions, the package/junction

temperature of a given device can be reduced dramatically

(typically 35%) by using one of DATEL's HS Series heat sinks.

See Ordering Information for the assigned part number. See

page 1-183 of the DATEL Data Acquisition Components

Catalog for more information on the HS Series. Request

DATEL Application Note AN-8, "Heat Sinks for DIP Data

Converters", or contact DATEL directly, for additional

information.

3. Full-Scale Adjustment

Set the output of the voltage reference used in step 2 to the

value shown in Table 2.

Adjust the gain trimpot until the output code flickers equally

between 11 1111 1111 1110 and 11 1111 1111 1111 with pin 8

1 234 5 6

中文翻译

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与ADS-941MC相关器件

型号	品牌	获取价格	描述	数据表
ADS-941MC-C	DATEL	获取价格	Sampling A/D Converters
ADS-941ME	CANDD	获取价格	14-Bit, 1MHz Sampling A/D Converters
ADS-941ME		获取价格	14-Bit, 1MHz Sampling A/D Converters
ADS-941ME-C	DATEL	获取价格	Sampling A/D Converters
ADS-941MM	ETC	获取价格	Analog-to-Digital Converter， 14-Bit
ADS942	ETC	获取价格
ADS-942		获取价格	14-Bit, 2MHz Sampling A/D Converters
ADS-942A	ETC	获取价格	14-Bit, 2MHz, Low-Power Sampling A/D Converters
ADS-942AMC	DATEL	获取价格	Sampling A/D Converters
ADS-942AME	ETC	获取价格	14-Bit, 2MHz, Low-Power Sampling A/D Converters

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