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參數資料
| 型號： | ISL60002BIH312 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Precision 1.25V & 2.50V Low Voltage FGA References |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.25 V, PDSO3 |
| 封裝： | TO-236-AB, SOT-23, 3 PIN |
| 文件頁數： | 11/15頁 |
| 文件大小： | 387K |
| 代理商： | ISL60002BIH312 |
11
Applications Information
FGA Technology
The ISL60002 series of voltage references use the floating
gate technology to create references with very low drift and
supply current. Essentially the charge stored on a floating
gate cell is set precisely in manufacturing. The reference
voltage output itself is a buffered version of the floating gate
voltage. The resulting reference device has excellent
characteristics which are unique in the industry: very low
temperature drift, high initial accuracy, and almost zero
supply current. Also, the reference voltage itself is not limited
by voltage bandgaps or zener settings, so a wide range of
reference voltages can be programmed (standard voltage
settings are provided, but customer-specific voltages are
available).
The process used for these reference devices is a floating
gate CMOS process, and the amplifier circuitry uses CMOS
transistors for amplifier and output transistor circuitry. While
providing excellent accuracy, there are limitations in output
noise level and load regulation due to the MOS device
characteristics. These limitations are addressed with circuit
techniques discussed in other sections.
Nanopower Operation
Reference devices achieve their highest accuracy when
powered up continuously, and after initial stabilization has
taken place. This drift can be eliminated by leaving the
power on continuously.
The ISL60002 is the first high precision voltage reference
with ultra low power consumption that makes it possible to
leave power on continuously in battery operated circuits. The
ISL60002 consumes extremely low supply current due to the
proprietary FGA technology. Supply current at room
temperature is typically 400nA which is 1 to 2 orders of
magnitude lower than competitive devices. Application
circuits using battery power will benefit greatly from having
an accurate, stable reference which essentially presents no
load to the battery.
In particular, battery powered data converter circuits that
would normally require the entire circuit to be disabled when
not in use can remain powered up between conversions as
shown in Figure 1. Data acquisition circuits providing 12 to
24 bits of accuracy can operate with the reference device
continuously biased with no power penalty, providing the
highest accuracy and lowest possible long term drift.
Other reference devices consuming higher supply currents
will need to be disabled in between conversions to conserve
battery capacity. Absolute accuracy will suffer as the device
is biased and requires time to settle to its final value, or, may
not actually settle to a final value as power on time may be
short.
Board mounting Considerations
For applications requiring the highest accuracy, board
mounting location should be reviewed. Placing the device in
areas subject to slight twisting can cause degradation of the
accuracy of the reference voltage due to die stresses. It is
normally best to place the device near the edge of a board,
or the shortest side, as the axis of bending is most limited at
that location. Obviously mounting the device on flexprint or
extremely thin PC material will likewise cause loss of
reference accuracy.
Noise Performance and Reduction:
The output noise voltage in a 0.1Hz to 10Hz bandwidth is
typically 30μVp-p. This is shown in the plot in the Typical
Performance Curves. The noise measurement is made with
a bandpass filter made of a 1 pole high-pass filter with a
corner frequency at 0.1Hz and a 2-pole low-pass filter with a
corner frequency at 12.6Hz to create a filter with a 9.9Hz
bandwidth. Noise in the 10kHz to 1MHz bandwidth is
approximately 400μVp-p with no capacitance on the output,
as shown in Figure 2. These noise measurements are made
with a 2 decade bandpass filter made of a 1 pole high-pass
filter with a corner frequency at 1/10 of the center frequency
and 1-pole low-pass filter with a corner frequency at 10 times
the center frequency. Figure 2 also shows the noise in the
10kHz to 1MHz band can be reduced to about 50μVp-p
using a .001μF capacitor on the output. Noise in the 1kHz to
100kHz band can be further reduced using a 0.1μF capacitor
on the output, but noise in the 1Hz to 100Hz band increases
due to instability of the very low power amplifier with a 0.1μF
capacitance load. For load capacitances above 0.001μF the
noise reduction network shown in fig. 3 is recommended.
This network reduces noise significantly over the full
bandwidth. As shown in figure 2, noise is reduced to less
than 40μVp-p from 1Hz to 1MHz using this network with a
0.01μF capacitor and a 2k
resistor in series with a 10μF
capacitor.
V
IN
= +3.0V
0.001μF–0.01μF
SERIAL
BUS
V
IN
V
OUT
ISL60002
GND
REF IN
Enable
SCK
SDAT
12 to 24-BIT
A/D CONVERTER
0.01μF
10μF
FIGURE 1.
ISL60002
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL60002BIH312-TK | 功能描述:IC VREF SERIES PREC SOT-23-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:FGA™ 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:80µA 電流 - 靜態:- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應商設備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| ISL60002BIH312Z | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| ISL60002BIH312Z-TK | 功能描述:IC VREF SERIES PREC SOT-23-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:FGA™ 標準包裝:1 系列:- 基準類型:串聯，精度 輸出電壓:4.5V 容差:±800µV 溫度系數:1ppm/°C 輸入電壓:13.5 V ~ 22 V 通道數:1 電流 - 陰極:- 電流 - 靜態:7mA 電流 - 輸出:10mA 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:20-LCC 供應商設備封裝:20-CLCC 包裝:管件 |
| ISL60002BIH318Z | 制造商:Intersil Corporation 功能描述:V-REF 1.800V LOW POWER FGA SMD |
| ISL60002BIH318Z-TK | 功能描述:IC VREF SERIES PREC 1.8V SOT23-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:FGA™ 標準包裝:1 系列:- 基準類型:串聯，精度 輸出電壓:4.5V 容差:±800µV 溫度系數:1ppm/°C 輸入電壓:13.5 V ~ 22 V 通道數:1 電流 - 陰極:- 電流 - 靜態:7mA 電流 - 輸出:10mA 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:20-LCC 供應商設備封裝:20-CLCC 包裝:管件 |
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