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參數(shù)資料
| 型號： | AD7721ARZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT SIGMA-DELTA 28SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 468.75k |
| 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）： | 150mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 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) |
| 輸入數(shù)目和類型： | 1 個差分，單極；1 個差分，雙極 |
SPECIFICATIONS1
Parameter
A Version
S Version
Units
Test Conditions/Comments
PARALLEL MODE ONLY
STATIC PERFORMANCE
Resolution
12
Bits
Minimum Resolution for Which
12
Bits min
Guaranteed 12 Bits Monotonic
No Missing Codes Is Guaranteed
Differential Nonlinearity
±1/2
LSB typ
Integral Nonlinearity
±1/2
LSB typ
12-Bit Operation
DC CMRR
70
dB min
Bipolar Mode
Offset Error
2
Unipolar Mode
±3.66
mV max
Typically 0.61 mV
Bipolar Mode
±3.66
mV max
Typically 0.61 mV
Full-Scale Error
2, 3
Unipolar Mode
±4.88
mV max
Typically 0.61 mV
Bipolar Mode
±4.88
mV max
Typically 1.22 mV
Unipolar Offset Drift
0.04
mV/
°C typ
Bipolar Offset Drift
0.035
mV/
°C typ
ANALOG INPUTS
Signal Input Span (VIN1–VIN2):
Bipolar Mode
±V
REFIN/2
±V
REFIN/2
Volts max
UNI = VIH
Unipolar Mode
0 to VREFIN
Volts max
UNI = VIL
Maximum Input Voltage
AVDD
Volts
Minimum Input Voltage
0
Volts
Input Sampling Capacitance
1.6
pF typ
Input Sampling Rate
2 fCLK
MHz
Guaranteed by Design
Differential Input Impedance
31.25
k
typ
With 10 MHz on CLK Pin
REFERENCE INPUTS
VREFIN
2.4 to 2.6
V min/V max
REFIN Input Current
200
A typ
DYNAMIC SPECIFICATIONS
Signal to (Noise + Distortion)
70
dB min
Input Bandwidth 0 kHz to 140 kHz
Total Harmonic Distortion
–78
dB max
Input Bandwidth 0 kHz to 152.8 kHz
Frequency Response
0 kHz–140 kHz
±0.05
dB max
152.8 kHz
–3
dB min
172.67 kHz to 9.827 MHz
–72
dB min
CLOCK
CLK Duty Ratio
45 to 55
% max
For Specified Operation
VCLKH, CLK High Voltage
0.7
× DV
DD
0.7
× DV
DD
V min
CLK Uses CMOS Logic
VCLKL, CLK Low Voltage
0.3
× DV
DD
0.3
× DV
DD
V max
LOGIC INPUTS
VINH, Input High Voltage
2.0
V min
VINL, Input Low Voltage
0.8
V max
IINH, Input Current
10
A max
CIN, Input Capacitance
10
pF max
LOGIC OUTPUTS
VOH, Output High Voltage
4.0
V min
|IOUT| ≤ 200 A
VOL , Output Low Voltage
0.4
V max
|IOUT| ≤ 1.6 mA
POWER SUPPLIES
AVDD
4.75/5.25
V min/V max
DVDD
4.75/5.25
V min/V max
IDD (Total from AVDD, DVDD)
28.5
mA max
Digital Inputs Equal to 0 V or DVDD
Power Consumption
150
mW max
Active Mode
Power Consumption
100
W max
Standby Mode
NOTES
1Operating temperature range is as follows: A Version: –40
°C to +85°C; S Version: –55°C to +125°C.
2Applies after calibration at temperature of interest.
3Full-scale error applies to both positive and negative full-scale error. The ADC gain is calibrated w.r.t. the voltage on the REFIN pin.
Specifications subject to change without notice.
–3–
REV. A
(AVDD = +5 V
5%; DVDD = +5 V
5%; AGND = DGND = 0 V, fCLK = 10 MHz,
REFIN = +2.5 V; TA = TMIN to TMAX, unless otherwise noted)
AD7721
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