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參數(shù)資料
| 型號： | AD7776AR |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 10BIT 1CH HS 24-SOIC |
| 標(biāo)準(zhǔn)包裝： | 31 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 37.8k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個(gè)單端，單極 |
REV. A
–2–
AD7776/AD7777/AD7778–SPECIFICATIONS
CLKIN = 8 MHz; RTN = O V; CREFIN = 10 nF; all specifications TMIN to TMAX unless otherwise noted.)
Parameter
A Versions
1
Units
Conditions/Comments
DC ACCURACY
Resolution
2
10
Bits
Relative Accuracy
±1
LSB max
See Terminology
Differential Nonlinearity
±1
LSB max
No Missing Codes; See Terminology
Bias Offset Error
±12
LSB max
See Terminology
Bias Offset Error Match
10
LSB max
Between Channels, AD7777/AD7778 Only; See Terminology
Plus or Minus Full-Scale Error
±12
LSB max
See Terminology
Plus or Minus Full-Scale Error Match 10
LSB max
Between Channels, AD7777/AD7778 Only; See Terminology
ANALOG INPUTS
Input Voltage Range
All Inputs
VBIAS
± V
SWING
V min/V max
Input Current
+200
A max
VIN = VBIAS
± V
SWING; Any Channel
REFERENCE INPUT
REFIN
1.9/2.1
V min/V max
For Specified Performance
REFIN Input Current
+200
A max
REFERENCE OUTPUT
REFOUT
1.9/2.1
V min/V max
Nominal REFOUT = 2.0 V
DC Output Impedance
5
typ
Reference Load Change
±2
mV max
For Reference Load Current Change of 0 to
±500 A
±5
mV max
For Reference Load Current Change of 0 to
±1 mA
Reference Load Should Not Change During Conversion
Short Circuit Current
3
20
mA max
See Terminology
LOGIC OUTPUTS
DB0–DB9,
BUSY/INT
VOL, Output Low Voltage
0.4
V max
ISINK = 1.6 mA
VOH, Output High Voltage
4.0
V min
ISOURCE = 200
A
Floating State Leakage Current
±10
A max
Floating State Capacitance
3
10
pF max
ADC Output Coding
Twos Complement
LOGIC INPUTS
DB0–DB9,
CS, WR, RD, CLKIN
Input Low Voltage, VINL
0.8
V max
Input High Voltage, VINH
2.4
V min
Input Leakage Current
10
A max
Input Capacitance
3
10
pF max
CONVERSION TIMING
Acquisition Time
4.5 tCLKIN
ns min
See Terminology
5.5 tCLKIN + 70
ns max
Single Conversion
14 tCLKIN
ns max
Double Conversion
28 tCLKIN
ns max
tCLKIN
125/500
ns min/ns max Period of Input Clock CLKIN
tCLKIN High
50
ns min
Minimum High Time for CLKIN
tCLKIN Low
40
ns min
Minimum Low Time for CLKIN
POWER REQUIREMENTS
VCC Range
4.75/5.25
V min/V max
For Specified Performance
ICC, Normal Mode
15
mA max
CS = RD = +5 V, CR8 = 0
ICC, Power-Down Mode
1.5
mA max
CR8 = 1. All Linear Circuitry OFF
Power-Up Time to Operational
Specifications
500
s max
From Power-Down Mode
DYNAMIC PERFORMANCE
See Terminology
Signal to Noise and Distortion
S/(N+D) Ratio
–56
dB min
VIN = 99.88 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz
Total Harmonic Distortion (THD)
–60
dB min
VIN = 99.88 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz
Intermodulation Distortion (IMD)
–75
dB typ
fa = 103.2 kHz, fb = 96.5 kHz with fSAMPLING = 380.95 kHz. Both
Signals Are Sine Waves at Half-Scale Amplitude
Channel-to-Channel Isolation
–90
dB typ
VIN = 100 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz
NOTES
1Temperature range as follows: A = –40
°C to +85°C.
21 LSB = (2
× V
SWING)/1024 = 1.95 mV for VSWING = 1.0 V.
3Guaranteed by design, not production tested.
Specifications subject to change without notice.
(VCC = +5 V
5%; AGND = DGND = O V;
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