参数资料
型号: AD7797BRUZ-REEL
厂商: Analog Devices Inc
文件页数: 19/24页
文件大小: 0K
描述: IC ADC 24BIT SIG-DEL 1CH 16TSSOP
标准包装: 2,500
位数: 24
采样率(每秒): 123
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 1.6mW
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: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
输入数目和类型: 1 个差分,单极;1 个差分,双极
配用: EVAL-AD7797EBZ-ND - BOARD EVALUATION FOR AD7797
AD7796/AD7797
Rev. A | Page 4 of 24
Parameter
AD7796B/AD7797B1
Unit
Test Conditions/Comments
INTERNAL/EXTERNAL CLOCK
Internal Clock
Frequency2
64 ± 3%
kHz min/max
Duty Cycle
50:50
% typ
External Clock
Frequency
64
kHz nom
A 128 kHz clock can be used if the divide by 2
function is used (Bit CLK1 = CLK0 = 1)
Duty Cycle
45:55 to 55:45
% typ
Applies for external 64 kHz clock (a 128 kHz
clock can have a less stringent duty cycle)
LOGIC INPUTS
Input Low Voltage, VINL
0.8
V max
DVDD = 5 V
0.4
V max
DVDD = 3 V
Input High Voltage, VINH
2.0
V min
DVDD = 3 V or 5 V
SCLK, CLK, and
DIN (Schmitt-Triggered Input)2
VT(+)
1.4/2
V min/V max
DVDD = 5 V
VT(–)
0.8/1.7
V min/V max
DVDD = 5 V
VT(+) VT(–)
0.1/0.17
V min/V max
DVDD = 5 V
VT(+)
0.9/2
V min/V max
DVDD = 3 V
VT(–)
0.4/1.35
V min/V max
DVDD = 3 V
VT(+)
VT(–)
0.06/0.13
V min/V max
DVDD = 3 V
Input Currents
±10
μA max
VIN = DVDD or GND
Input Capacitance
10
pF typ
All digital inputs
LOGIC OUTPUTS (INCLUDING CLK)
Output High Voltage, VOH2
DVDD 0.6
V min
DVDD = 3 V, ISOURCE = 100 μA
4
V min
DVDD = 5 V, ISOURCE = 200 μA
Output Low Voltage, VOL2
0.4
V max
DVDD = 3 V, ISINK = 100 μA
0.4
V max
DVDD = 5 V, ISINK = 1.6 mA (DOUT/RDY)/800 μA (CLK)
Floating-State Leakage Current
±10
μA max
Floating-State Output Capacitance
10
pF typ
Data Output Coding
Offset Binary
SYSTEM CALIBRATION2
Full-Scale Calibration Limit
+1.05 × FS
V max
Zero-Scale Calibration Limit
1.05 × FS
V min
Input Span
0.8 × FS
V min
2.1 × FS
V max
POWER REQUIREMENTS7
Power Supply Voltage
AVDD – GND
2.7/5.25
V min/max
DVDD – GND
2.7/5.25
V min/max
Power Supply Currents
IDD Current
325
μA max
250 μA typ @ AVDD = 3 V, 280 μA typ @ AVDD = 5 V
IDD (Power-Down Mode)
1
μA max
1 Temperature range is –40°C to +85°C.
2 Specification is not production tested, but is supported by characterization data at initial product release.
3 Following a calibration, this error is in the order of the noise for the update rate selected.
4 Recalibration at any temperature removes these errors.
5 Full-scale error applies to both positive and negative full-scale and applies at the factory calibration conditions (AVDD = 4 V, TA = 25°C).
6 FS[3:0] are the four bits used in the mode register to select the output word rate.
7 Digital inputs equal to DVDD or GND.
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