Datasheet > 5962-8961701LA

5962-8961701LA

更新时间： 2024-01-14 21:02:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
8页	288K
描述
Microprocessor-Compatible 12-Bit D/A Converter

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技术参数
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5962-8961701LA 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	DIP
包装说明：	1.280 X 0.310 INCH, HERMETIC SEALED, CERAMIC, DIP-24	针数：	24
Reach Compliance Code：	not_compliant	ECCN代码：	3A001.A.2.C
HTS代码：	8542.39.00.01	风险等级：	5.11
转换器类型：	D/A CONVERTER	输入位码：	BINARY
输入格式：	PARALLEL, WORD	JESD-30 代码：	R-CDIP-T24
JESD-609代码：	e0	长度：	30.48 mm
最大线性误差 (EL)：	0.024%	标称负供电电压：	-15 V
位数：	12	功能数量：	1
端子数量：	24	最高工作温度：	125 °C
最低工作温度：	-55 °C	封装主体材料：	CERAMIC, METAL-SEALED COFIRED
封装代码：	DIP	封装等效代码：	DIP24,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	+-12/+-15 V
认证状态：	Qualified	筛选级别：	38535Q/M;38534H;883B
最大稳定时间：	4 µs	标称安定时间 (tstl)：	3 µs
子类别：	Other Converters	最大压摆率：	23 mA
标称供电电压：	15 V	表面贴装：	NO
技术：	BIPOLAR	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：	7.62 mm
Base Number Matches：	1

5962-8961701LA 数据手册

AD767

BIPOLAR CONFIGURATION (Figure 3)

This configuration will provide a bipolar output voltage from

–5.000 to +4.9976 volts, with positive full scale occurring with

all bits ON (all 1s).

The AD767 reference output should be buffered with an

external op amp if it is required to supply more than 0.1 mA

output current. The reference is typically trimmed to ±0.2%,

then tested and guaranteed to ±1.0% max error. The

temperature coefficient is comparable to that of the full-scale

TC for a particular grade.

STEP I … OFFSET ADJUST

Turn OFF all bits. Adjust 100 Ω trimmer R1 to give –5.000

volts output.

If an external reference is used (10.000 V, for example),

additional trim range must be provided, since the internal

reference has a tolerance of ±1%, and the AD767 full-scale and

bipolar offset are both trimmed with the internal reference. The

gain and offset trim resistors give about ±0.25% adjustment

range, which is sufficient for the AD767 when used with the

internal reference.

STEP II … GAIN ADJUST

Turn ON all bits. Adjust 100 Ω gain trimmer R2 to give a

reading of +4.9976 volts.

STEP III … BIPOLAR ZERO ADJUST (Optional)

In applications where an accurate zero output is required, set

the MSB ON, all other bits OFF, and readjust R1 for zero volts

output.

It is also possible to use external references other than 10 volts.

The recommended range of reference voltage is from +8 to

+10.5 volts, which allows both 8.192 V and 10.24 V ranges to

be used. The AD767 is optimized for fixed-reference applications.

If the reference voltage is expected to vary over a wide range in

a particular application, a CMOS multiplying DAC is a better

choice.

Reduced values of reference voltage will also permit the ±12 volt

±5% power supply requirement to be relaxed to ±12 volts

±10%.

It is not recommended that the AD767 be used with external

feedback resistors to modify the scale factor. The internal

resistors are trimmed to ratio-match and temperature-track the

other resistors on the chip, even though their absolute tolerances

are ±20%, and absolute temperature coefficients are approximately

–50 ppm/°C. If external resistors are used, a wide trim range

(±20%) will be needed and temperature drift will be increased

to reflect the mismatch between the temperature coefficients of

the internal and external resistors.

Figure 3. ±5 V Bipolar Voltage Output

INTERNAL/EXTERNAL REFERENCE USE

The AD767 has an internal low-noise buried Zener diode

reference which is trimmed for absolute accuracy and tempera-

ture coefficient. This reference is buffered and optimized for use

in a high-speed DAC and will give long-term stability equal or

superior to the best discrete Zener reference diodes. The per-

formance of the AD767 is specified with the internal reference

driving the DAC since all trimming and testing (especially for

full-scale error and bipolar offset) is done in this configuration.

Small resistors may be added to the feedback resistors in order

to accomplish small modifications in the scaling. For example, if

a 10.24 V full scale is desired, a 140 Ω 1% low-TC metal-film

resistor can be added in series with the internal (nominal) 5k

feedback resistor, and the gain trim potentiometer (between

Pins 6 and 7) should be increased to 200 Ω. In the bipolar

mode, increase the value of the bipolar offset trim potentiometer

also to 200 Ω.

The internal reference has sufficient buffering to drive external

circuitry in addition to the reference currents required for the

DAC (typically 0.5 mA to Ref In and 1.0 mA to Bipolar Offset).

A minimum of 0.1 mA is available for driving external loads.

Figure 4. Using the AD767 with the AD588 High Precision Reference

–5–

REV. A

1 2 3 456 7 8

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