Datasheet > 5962-88659013A

5962-88659013A

更新时间： 2024-02-10 01:13:47

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	325K
描述
Microprocessor-Compatible 12-Bit D/A Converter

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技术参数
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5962-88659013A 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：	QLCC
包装说明：	QCCN, LCC28,.45SQ	针数：	28
Reach Compliance Code：	unknown	ECCN代码：	3A001.A.2.C
HTS代码：	8542.39.00.01	风险等级：	1.53
转换器类型：	D/A CONVERTER	输入位码：	BINARY
输入格式：	PARALLEL, WORD	JESD-30 代码：	S-CQCC-N28
JESD-609代码：	e0	长度：	11.43 mm
最大线性误差 (EL)：	0.018%	标称负供电电压：	-15 V
位数：	12	功能数量：	1
端子数量：	28	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：	QCCN	封装等效代码：	LCC28,.45SQ
封装形状：	SQUARE	封装形式：	CHIP CARRIER
峰值回流温度（摄氏度）：	NOT APPLICABLE	电源：	+-12/+-15 V
认证状态：	Qualified	筛选级别：	38535Q/M;38534H;883B
座面最大高度：	2.54 mm	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：	25 mA	标称供电电压：	15 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	MILITARY	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	NO LEAD	端子节距：	1.27 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT APPLICABLE
宽度：	11.43 mm	Base Number Matches：	1

5962-88659013A 数据手册

AD667

ANALOG CIRCUIT CONNECTIONS

Internal scaling resistors provided in the AD667 may be connected

to produce bipolar output voltage ranges of ±10, ±5 or ±2.5 V or

unipolar output voltage ranges of 0 V to +5 V or 0 V to +10 V.

Gain and offset drift are minimized in the AD667 because of the

thermal tracking of the scaling resistors with other device com-

ponents. Connections for various output voltage ranges are

shown in Table I.

Figure 3. ±5 V Bipolar Voltage Output

INTERNAL/EXTERNAL REFERENCE USE

The AD667 has an internal low noise buried Zener diode refer-

ence which is trimmed for absolute accuracy and temperature

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 performance of

the AD667 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.

Figure 1. Output Amplifier Voltage Range Scaling Circuit

UNIPOLAR CONFIGURATION (Figure 2)

This configuration will provide a unipolar 0 volt to +10 volt out-

put range. In this mode, the bipolar offset terminal, Pin 4, should

be grounded if not used for trimming.

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 Off-

set). A minimum of 0.1 mA is available for driving external

loads. The AD667 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 tempera-

ture coefficient is comparable to that of the full-scale TC for a

particular grade.

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

tional trim range must be provided, since the internal reference

has a tolerance of ±1%, and the AD667 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 AD667 when used with the internal

reference.

Figure 2. 0 V to +10 V Unipolar Voltage Output

STEP I . . . ZERO ADJUST

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

The recommended range of reference voltage is from +8 to

+11 volts, which allows both 8.192 V and 10.24 V ranges to be

used. The AD667 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.

Turn all bits OFF and adjust zero trimmer R1, until the output

reads 0.000 volts (1 LSB = 2.44 mV). In most cases this trim is

not needed, and Pin 4 should be connected to Pin 5.

STEP II . . . GAIN ADJUST

Turn all bits ON and adjust 100 Ω gain trimmer R2, until the

output is 9.9976 volts. (Full scale is adjusted to 1 LSB less than

nominal full scale of 10.000 volts.)

Reduced values of reference voltage will also permit the ±12

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

± 10%.

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).

It is not recommended that the AD667 be used with external

feedback resistors to modify the scale factor. The internal resis-

tors 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.

STEP I . . . OFFSET ADJUST

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

volts output.

STEP II . . . GAIN ADJUST

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

ing of +4.9976 volts.

REV. A

–5–

1 2 3 456 7 8

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