3
參數(shù)資料
型號(hào)： AD7868BR-REEL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 10/16頁(yè)
文件大?。?/td> 0K
描述： IC I/O PORT 12BIT ANLG 28-SOIC
產(chǎn)品變化通告： AD7868 Discontinuation 05/Sept/2011
標(biāo)準(zhǔn)包裝： 1,000
應(yīng)用： 模擬 I/O
接口： TTL/CMOS
電源電壓： 4.75 V ~ 5.25 V
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 帶卷 (TR)
安裝類(lèi)型： 表面貼裝
ABT
Parameter
Version
1
Version
1
Version
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
2
Signal-to-Noise Ratio
3 (SNR) @ +25
°C
70
72
70
dB min
VOUT = 1 kHz Sine Wave, fSAMPLE = 83 kHz
TMIN to TMAX
70
71
70
dB min
Typically 71.5 dB at +25
°C for 0 < V
OUT < 20 kHz
4
Total Harmonic Distortion (THD)
–78
–76
dB max
VOUT = 1 kHz Sine Wave, fSAMPLE = 83 kHz
Typically –84 dB at +25
°C for 0 < V
OUT < 20 kHz
4
Peak Harmonic or Spurious Noise
–78
–76
dB max
VOUT = 1 kHz Sine Wave, fSAMPLE = 83 kHz
Typically –84 dB at +25
°C for 0 < V
OUT < 20 kHz
4
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity
±1/2
LSB typ
Integral Nonlinearity
±1
LSB max
Differential Nonlinearity
±0.9
LSB max
Guaranteed Monotonic
Bipolar Zero Error
±5
LSB max
Positive Full-Scale Error5
±5
LSB max
Negative Full-Scale Error5
±5
LSB max
REFERENCE OUTPUT
6
RO ADC @ +25
°C
2.99/3.01
V min/V max
RO ADC TC
±25
ppm/
°C typ
RO ADC TC
±40
±50
ppm/
°C max
Reference Load Change (
RO DAC vs. I)
–1.5
mV max
Reference Load Current Change (0–500
A)
REFERENCE INPUT
RI DAC Input Range
2.85/3.15
V min/V max 3 V
± 5%
Input Current
1
A max
LOGIC INPUTS (LDAC, TFS, TCLK, DT)
Input High Voltage, VINH
2.4
V min
VDD = 5 V ± 5%
Input Low Voltage, VINL
0.8
V max
VDD = 5 V ± 5%
Input Current, IIN
±10
A max
VIN = 0 V to VDD
Input Capacitance, CIN
7
10
pF max
ANALOG INPUT
Output Voltage Range
±3
V nom
dc Output Impedance
0.3
typ
Short-Circuit Current
20
mA typ
AC CHARACTERISTICS
7
Voltage Output Settling-Time
Settling Time to Within
±1/2 LSB of Final Value
Positive Full-Scale Change
3
s max
Typically 2
s
Negative Full-Scale Change
3
s max
Typically 2.5
s
Digital-to-Analog Glitch Impulse
10
nV secs typ
DAC Code Change All 1s to All 0s
Digital Feedthrough
2
nV secs typ
VIN to VOUT Isolation
100
dB typ
VIN = ± 3 V, 41.5 kHz Sine Wave
POWER REQUIREMENTS
As per ADC Section
NOTES
1Temperature ranges are as follows: A/B Versions, –40
°C to +85°C; T Version, –55°C to +125°C.
2V
OUT (pk–pk) =
± 3 V.
3SNR calculation includes distortion and noise components.
4Using external sample and hold.
5Measured with respect to RI DAC and includes bipolar offset error.
6For capacitive loads greater than 50 pF a series resistor is required
(see INTERNAL REFERENCE section).
7Sample tested @ +25
°C to ensure compliance.
Specifications subject to change without notice.
ORDERING GUIDE
Relative
Temperature
Accuracy
Package
Model
Range
SNR
(LSB)
Option*
AD7868AN
–40
°C to +85°C 70 dB
±1/2 typ
N-24
AD7868AQ
–40
°C to +85°C 70 dB
±1/2 typ
Q-24
AD7868BN
–40
°C to +85°C 72 dB
±1 max
N-24
AD7868BQ
–40
°C to +85°C 72 dB
±1 max
Q-24
AD7868AR
–40
°C to +85°C 70 dB
±1/2 typ
R-28
AD7868BR
–40
°C to +85°C 72 dB
±1 max
R-28
*N = Plastic DIP; Q = Cerdip; R = SOIC (Small Outline IC).
DAC SECTION
AD7868
–3–
REV. B
(VDD = +5 V
5%, VSS = –5 V
5%, AGND = DGND = 0 V, RI DAC = +3 V and decoupled as shown in Figure 2, VOUT
Load to AGND; RL = 2 k
, C
L = 100 pF. All specifications TMIN to TMAX unless otherwise noted.)
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