AD587KR-REEL

更新时间： 2025-07-19 12:36:11

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	361K
描述
High Precision 10 V Reference

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AD587KR-REEL 数据手册

AD587

THEORY OF OPERATION

The AD587 consists of a proprietary buried Zener diode

reference, an amplifier to buffer the output, and several high

stability thin-film resistors, as shown in Figure 3. This design

results in a high precision monolithic 10 V output reference

with initial offset of 5 mV or less. The temperature-compensa-

tion circuitry provides the device with a temperature coefficient

of less than 5 ppm/°C.

NOISE PERFORMANCE AND REDUCTION

Noise generated by the AD587 is typically less than 4 μV p-p

over the 0.1 Hz to 10 Hz band. Noise in a 1 MHz bandwidth is

approximately 200 μV p-p. The dominant source of this noise is

the buried Zener, contributing approximately 100 nV/√Hz. By

comparison, the contribution of the op amp is negligible.

Figure 5 shows the 0.1 Hz to 10 Hz noise of a typical AD587.

The noise measurement is made with a band-pass filter made

of a 1-pole high-pass filter with a corner frequency at 0.1 Hz

and a 2-pole low-pass filter with a corner frequency at 12.6 Hz

to create a filter with a 9.922 Hz bandwidth.

NOISE

REDUCTION

OUT

1µV

100

TRIM

AD587

1µV

GND

NOTE

PIN 1, PIN 3, AND PIN 7 ARE INTERNAL TEST

POINTS. NO CONNECTIONS TO THESE POINTS.

Figure 3. Functional Block Diagram

A capacitor can be added at the NOISE REDUCTION pin

(Pin 8) to form a low-pass filter with R_Sto reduce the noise

contribution of the Zener to the circuit.

Figure 5. 0.1 Hz to 10 Hz Noise

APPLYING THE AD587

If further noise reduction is desired, an external capacitor can

be added between the NOISE REDUCTION pin and ground,

as shown in Figure 4. This capacitor, combined with the 4 kΩ R_S

and the Zener resistances, forms a low-pass filter on the output

of the Zener cell. A 1 μF capacitor has a 3 dB point at 40 Hz

and reduces the high frequency (up to 1 MHz) noise to about

160 μV p-p. Figure 6 shows the 1 MHz noise of a typical AD587,

both with and without a 1 μF capacitor.

The AD587 is simple to use in virtually all precision reference

applications. When power is applied to Pin 2 and Pin 4 is

grounded, Pin 6 provides a 10 V output. No external compo-

nents are required; the degree of desired absolute accuracy is

achieved simply by selecting the required device grade. The

AD587 requires less than 4 mA quiescent current from an

operating supply of 15 V.

Fine trimming may be desired to set the output level to exactly

10.000 V (calibrated to a main system reference). System cali-

bration may also require a reference voltage that is slightly

different from 10.000 V, for example, 10.24 V for binary

applications. In either case, the optional fine-trimming circuit

shown in Figure 4 can offset the output by as much as 300 mV

with minimal effect on other device characteristics.

50µs

200µV

100

– 1µF

NO C

OPTIONAL

NOISE-

REDUCTION

CAPACITOR

OUTPUT

OUT

NOISE

REDUCTION

Figure 6. Effect of 1 μF Noise-Reduction Capacitor on Broadband Noise

AD587

1µF

TRIM

10kΩ

GND

Figure 4. Optional Fine-Trimming Configuration

Rev. H | Page 6 of 12

1...3 4 567 8 9...12

中文翻译

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AD587KR-REEL 替代型号

型号	品牌	替代类型	描述	数据表
AD587KR	ADI	完全替代	High Precision 10 V Reference
AD587KRZ-REEL	ADI	完全替代	High Precision 10 V Reference
AD587KRZ-REEL7	ADI	完全替代	High Precision 10 V Reference

与AD587KR-REEL相关器件

型号	品牌	获取价格	描述	数据表
AD587KR-REEL7	ADI	获取价格	High Precision 10 V Reference
AD587KRZ	ADI	获取价格	High Precision 10 V Reference
AD587KRZ-REEL	ADI	获取价格	High Precision 10 V Reference
AD587KRZ-REEL1	ADI	获取价格	High Precision 10 V Reference
AD587KRZ-REEL7	ADI	获取价格	High Precision 10 V Reference
AD587KRZ-REEL71	ADI	获取价格	High Precision 10 V Reference
AD587KRZ1	ADI	获取价格	High Precision 10 V Reference
AD587LN	ADI	获取价格	High Precision 10 V Reference
AD587LNZ	ADI	获取价格	IC 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 10 V, PDIP8, LEAD FREE, PLASTIC, MO-095BA, DIP-8
AD587LQ	ADI	获取价格	High Precision 10 V Reference

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