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參數(shù)資料
| 型號(hào)： | AD7716BP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS 22-Bit Data Acquisition System |
| 中文描述： | 4-CH 22-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 430K |
| 代理商： | AD7716BP |
REV. A
AD7716
–8–
OUTPUT UPDATE RATE
This is the rate at which the digital filter updates the output shift
register. It is a function of the master clock frequency and the
programmed filter cutoff frequency.
FILTER CUTOFF FREQUENCY
The digital filter of the AD7716 can be programmed, in binary
steps, to 5 discrete cutoff frequencies, ranging from 584 Hz to
36.5 Hz (for a CLKIN frequency of 8 MHz).
SETTLING TIME
This is the settling time of the on-chip digital filter, to 0.0007%
of FSR, in response to a full-scale step at the input of the ADC.
It is proportional to the master clock frequency and the filter
cutoff frequency.
USABLE DYNAMIC RANGE
The usable dynamic range is the ratio of the rms full-scale
reading (sine wave input) to the rms noise of the converter,
expressed in dBs. It determines the level to which it is possible
to resolve the input signal. For example, at a bandwidth of
146 Hz, the rms noise of the converter is 11
μ
V. The full-scale
rms is 1.77 volts. So, the usable dynamic range is 104 dB. Any
signal below this level will be indistinguishable from noise unless
extra post-filtering techniques are employed.
TOTAL HARMONIC DISTORTION
Total harmonic distortion (THD) is the ratio of the rms sum
of the harmonics to the fundamental. For the AD7716, it is
defined as:
THD
(
dB
)
=
20 log
V
2
2
+
V
3
2
+
V
4
V
1
2
+
V
5
2
+
V
6
2
where V
1
is the rms amplitude of the fundamental and V
2
, V
3
,
V
4
, V
5
and V
6
are the rms amplitudes of the second through
sixth harmonics.
ABSOLUTE GROUP DELAY
Absolute group delay is the rate of change of phase versus fre-
quency, d
φ
/df and is expressed in seconds. For the AD7716,
it is dependent on master clock frequency and filter cutoff
frequency.
DIFFERENTIAL GROUP DELAY
Differential group delay is the total variation in absolute group
delay in the specified bandwidth. Since the digital filter in the
AD7716 has perfectly linear phase, the differential group delay
is almost zero. This is important in many signal processing ap-
plications where excessive differential group delay can cause
phase distortion.
TERMINOLOGY
LINEARITY ERROR
This is the maximum deviation of any code from a straight line
passing through the endpoints of the transfer function. The
endpoints of the transfer function are zero scale (not to be con-
fused with Bipolar Zero), a point 0.5 LSB below the first code
transition (000 . . . 000 to 000 . . . 001) and full scale, a point
0.5 LSB above the last code transition (111 . . . 110 to
111 . . . 111). The error is expressed as a percentage of full
scale.
DIFFERENTIAL LINEARITY ERROR/NO MISSED CODES
This is the difference between any code’s actual width and the
ideal (1 LSB) width. Differential Linearity Error is expressed in
LSBs. A differential linearity specification of
±
1 LSB or less
guarantees no missed codes to the full resolution of the device.
The AD7716 has no missed codes guaranteed to 21 bits with a
cutoff frequency of 146 Hz.
GAIN ERROR
Gain Error is the deviation of the last code transition
(111 . . . 110 to 111 . . . 1) from the ideal (V
REF
–3/2 LSBs). It
is expressed as a percentage of full scale.
GAIN TC
This is the variation of gain error with temperature and is ex-
pressed in
μ
V/
°
C.
OFFSET ERROR
Offset Error is the deviation of the first code transition from the
ideal (–V
REF
+ 0.5 LSB). It is expressed as a percentage of full
scale.
OFFSET TC
This is the variation of offset error with temperature and is ex-
pressed in
μ
V/
°
C.
NOISE
This is the converter rms noise expressed in
μ
V. Because of the
digital filtering in the sigma delta converter, the noise perfor-
mance is a function of the programmed filter cutoff.
SAMPLING RATE
This is the modulator sampling rate. For the AD7716, it is
f
CLKIN
/14.
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|---|---|
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7716BP-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 570ksps 22-bit Serial 44-Pin PLCC T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 2.2KSPS 22-BIT SERL 44PLCC - Tape and Reel |
| AD7716BPZ | 功能描述:IC ADC 22BIT SIGMA-DELTA 44-PLCC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7716BS | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 570ksps 22-bit Serial 44-Pin MQFP 制造商:Analog Devices 功能描述:IC SIGMA DELTA ADC |
| AD7716BSZ | 功能描述:IC ADC 22BIT SIGMA-DELTA 44-MQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
| AD7716-DF | 功能描述:IC ADC 22BIT SIGMA-DELTA 制造商:analog devices inc. 系列:- 零件狀態(tài):上次購買時(shí)間 標(biāo)準(zhǔn)包裝:1 |
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