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參數資料
| 型號： | AD7740 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter |
| 中文描述： | 3伏/ 5 V低功耗，同步電壓頻率轉換器 |
| 文件頁數： | 5/11頁 |
| 文件大?。?/td> | 144K |
| 代理商： | AD7740 |
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 |
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| 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 |
| AD7741BR | Single and Multichannel, Synchronous Voltage-to-Frequency Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD-7740H-01 | 制造商:Sony Semiconductor Solutions Division 功能描述:Eight X Tray DVD/RW SATA 12.7mm |
| AD7740KRM | 功能描述:IC CONVERTER V TO FREQ 8-MSOP RoHS:否 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 |
| AD7740KRM-REEL | 制造商:Analog Devices 功能描述:VFC Sync 1MHz 8-Pin MSOP T/R 制造商:Analog Devices 功能描述:VFC SYNC 1MHZ 8MSOP - Tape and Reel |
| AD7740KRM-REEL7 | 功能描述:IC CONVERTER V TO FREQ 8-MSOP RoHS:否 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 |
| AD7740KRMZ | 功能描述:IC CONV SYNC VOLT-FREQ 8-MSOP 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 |
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