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參數資料
| 型號： | AD7740YRT |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬專用變換器 |
| 英文描述： | 3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter |
| 中文描述： | VOLTAGE-FREQUENCY CONVERTER, 1 MHz, PDSO8 |
| 封裝： | SOT-23, 8 PIN |
| 文件頁數： | 5/11頁 |
| 文件大?。?/td> | 144K |
| 代理商： | AD7740YRT |
AD7740
REV. 0
–5–
TERMINOLOGY
INTEGRAL NONLINEARITY
For the VFC, Integral Nonlinearity (INL) is a measure of the maxi-
mum deviation from a straight line passing through the actual
endpoints of the VFC transfer function. The error is expressed in
% of the actual frequency span:
Frequency Span
=
FOUT(max) – FOUT(min
)
OFFSET ERROR
Ideally, the output frequency for 0 V input voltage is 10% of
f
CLKIN
in unbuffered mode. The deviation from this value referred
to the input is the offset error at BUF = 0. In buffered mode the
minimum output frequency (corresponding to 0.10 V minimum
input voltage) is 13.2% of f
CLKIN
at V
REF
= 2.5 V. The deviation
from this value referred to the input is the offset error at BUF = 1.
Offset error is expressed in mV.
GAIN ERROR
This is a measure of the span error of the VFC. The gain is the
scale factor that relates the input VIN to the output FOUT.
The gain error is the deviation in slope of the actual VFC transfer
characteristic from the ideal expressed as a percentage of the full-
scale span. See Figure 2.
OFFSET ERROR DRIFT
This is a measure of the change in Offset Error with changes in
temperature. It is expressed in
μ
V/
°
C.
GAIN ERROR DRIFT
This is a measure of the change in Gain Error with changes in
temperature. It is expressed in (ppm of span)/
°
C.
POWER SUPPLY REJECTION RATIO (PSRR)
This indicates how the apparent input voltage of the VFC is
affected by changes in the supply voltage. The input voltage is
kept constant at 2 V, V
REF
is 2.5 V and the VDD supply is varied
10% at 3.3 V and
±
5% at 5 V. The ratio of the apparent change
in input voltage to the change in VDD is measured in dBs.
0
REFIN
WITH OFFSET
ERROR ONLY
WITH OFFSET
ERROR AND
GAIN ERROR
IDEAL
GAIN ERROR
OUTPUT
FREQUENCY
FOUT
0.9 f
CLKIN
OFFSET
ERROR
INPUT
VOLTAGE
VIN
0.1
f
CLKIN
Figure 2. Offset and Gain
相關PDF資料 |
PDF描述 |
|---|---|
| AD7740 | 3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter |
| AD7740YRM | 3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter |
| AD7741YR | Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
| AD7742YR | Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
| AD7741BN | Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7740YRT-REEL | 制造商:Analog Devices 功能描述: |
| AD7740YRT-REEL7 | 制造商:Rochester Electronics LLC 功能描述:LOW COST SMALL SYNCHRONOUS VFC ADC. I.C. - Tape and Reel 制造商:Analog Devices 功能描述: |
| AD7740YRTZ-REEL7 | 功能描述:IC CONVERTER VOLT-FREQ SOT23-8 RoHS:是 類別:集成電路 (IC) >> PMIC - V/F 和 F/V 轉換器 系列:- 標準包裝:1 系列:- 類型:頻率至電壓 頻率 - 最大:10kHz 全量程:- 線性:±0.3% 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:Digi-Reel® 其它名稱:LM2917MX-8/NOPBDKR |
| AD7741 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
| AD7741BN | 制造商:Analog Devices 功能描述:VFC Sync 1.35MHz 8-Pin PDIP Tube 制造商:Rochester Electronics LLC 功能描述:SINGLE + MULTI-CHANNEL VFC I.C. - Bulk 制造商:Analog Devices 功能描述:IC VOLTAGE-FREQ CONVERTER |
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