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参数资料
型号： AD7719BRUZ
厂商： Analog Devices Inc
文件页数： 37/40页
文件大小： 0K
描述： IC ADC 16BIT 24BIT DUAL 28-TSSOP
标准包装： 50
位数： 16/24
采样率（每秒）： 105
数据接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
转换器数目： 2
功率耗散（最大）： 4.5mW
电压电源： 模拟和数字
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 28-TSSOP（0.173"，4.40mm 宽）
供应商设备封装： 28-TSSOP
包装： 管件
输入数目和类型： 3 个差分，单极；3 个差分，双极
产品目录页面： 778 (CN2011-ZH PDF)
REV. A
AD7719
–6–
Parameter
AD7719B
Unit
Test Conditions
Power Supply Currents (Continued)
AIDD Current (Main ADC)
1.1
mA max
AVDD = 3 V or 5 V, Buffered Mode,
0.85 mA typ
0.55
mA max
AVDD = 3 V or 5 V, Unbuffered Mode,
0.45 mA typ
AIDD Current (Aux ADC)
0.3
mA max
AVDD = 3 V or 5 V, 0.25 mA typ
AIDD Current (Main and Aux ADC)
1.25
mA max
AVDD = 3 V or 5 V, Main ADC Buffered,
1 mA typ
DIDD (ADC Disable Mode)
13
0.35
mA max
DVDD = 3 V, 0.25 mA typ
0.4
mA max
DVDD = 5 V, 0.3 mA typ
AIDD (ADC Disable Mode)
0.15
mA max
AVDD = 3 V or 5 V
DIDD (Power-Down Mode)
10
A max
DVDD = 3 V, 32.768 kHz Osc. Running
2
A max
DVDD = 3 V, Oscillator Powered Down
30
A max
DVDD = 5 V, 32.768 kHz Osc. Running
8
A max
DVDD = 5 V, Oscillator Powered Down
AIDD (Power-Down Mode)
1
A max
AVDD = 3 V or 5 V
NOTES
1Temperature range –40°C to +85°C.
2Guaranteed by design and/or characterization data on production release.
3System zero calibration will remove this error.
4A calibration at any temperature will remove this drift error.
5The main ADC is factory-calibrated with AV
DD = DVDD = 4 V, TA = 25°C, REFIN1(+) – REFIN1(–) = 2.5 V. If the user power supplies or temperature conditions
are significantly different from these, internal full-scale calibration will restore this error to the published specification. System calibration can be used to reduce this
error to the order of the noise. Full-scale error applies to both positive and negative full scale.
6A system full-scale calibration will remove this error.
7A typical gain error of ±10 V results following a user self-calibration.
8Simultaneous 50 Hz and 60 Hz rejection is achieved using 19.8 Hz (SF = 69) update rate. Normal mode rejection in this case is 60 dB min.
9After a calibration if the analog input exceeds positive full scale, the converter will output all 1s. If the analog input is less than negative full scale, the device will
output all 0s.
10 FS = Full-Scale Input. FS = 1.024
× REFIN1/Gain on the main ADC, where REFIN1 = REFIN1(+) – REFIN1(–). FS = REFIN2 on the aux ADC when ARN = 1
in the aux ADC control register (AD1CON) and REFIN2/2 on the aux ADC when ARN = 0.
11 Input and output levels on the I/O Port are with respect to AV
DD and AGND.
12 Normal mode refers to the case where both main and aux ADCs are running.
13 ADC disable is entered by setting both the AD0EN and AD1EN bits in the main and aux ADC control registers to a 0 and setting the mode bits (MD2, MD1,
MD0) in the mode register to non-0.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
1
(TA = 25°C, unless otherwise noted.)
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
DVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
AGND to DGND
2. . . . . . . . . . . . . . . . . . . –20 mV to +20 mV
PWRGND to AGND . . . . . . . . . . . . . . . . –20 mV to +20 mV
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . –5 V to +5 V
Analog Input Voltage to AGND . . . .
–0.3 V to AVDD +0.3 V
Reference Input Voltage to AGND . .
–0.3 V to AVDD +0.3 V
Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . 30 mA
Digital Input Voltage to DGND . . . . –0.3 V to DVDD +0.3 V
Digital Output Voltage to DGND . . . –0.3 V to DVDD +0.3 V
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
SOIC Package
θ
JA Thermal Impedance
. . . . . . . . . . . . . . . . . . . . 71.4°C/W
θ
JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 23°C/W
TSSOP Package
θ
JA Thermal Impedance
. . . . . . . . . . . . . . . . . . . . 97.9°C/W
θ
JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
NOTES
1 Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2 AGND and DGND are connected internally within the AD7719.
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
AD7719BR
–40°C to +85°C
SOIC
R-28
AD7719BRU
–40°C to +85°CTSSOP
RU-28
EVAL-AD7719EB
Evaluation Board
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