参数资料
型号: AS8510-ASST
厂商: ams
文件页数: 5/47页
文件大小: 0K
描述: IC BATTERY MANAGEMENT 20-SSOP
产品培训模块: AS8510 Data Acquisition IC
标准包装: 2,000
类型: 电池管理
输入类型: 模拟,数字
输出类型: 模拟,数字
接口: SPI 串行
电流 - 电源: 5mA
安装类型: 表面贴装
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
供应商设备封装: 20-SSOP
包装: 带卷 (TR)
Revision 3.5
12 - 46
AS8510
Datasheet - Electrical Character i s t ics
6.4.3 Sigma Delta Analog to Digital Converter
Notes:
1. Production test at ±800mV. Maximum VIN can be 1.22V with VREF=1.225V.
2. Programmable. It is defined with respect to the first decimator in the
ΣΔ ADC.
3. Programmable: Internal clock is 1024/2048 kHz; external clock max is 8192 kHz.
4. Dependent on fovs, R1 and R2. The bandwidth is calculated according to the formula:
BW=fovs/(2*R1*R2); the sampling frequency at the output of the A/D converter is 2*BW.
5. Defined at maximum input signal, BW=500 Hz (1Hz to 500 Hz), fovs=1024 kHz, R1=64, fchop=2 kHz and R2=2.
6. Reference voltage might be forced from external.
6.4.4 Bandgap Reference Voltage
Notes:
1. Accuracy at 65C.
2. No DC current is allowed from this pin.
3. This is a design parameter and not production tested.
Table 17. Sigma Delta Analog to Digital Converter
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VREF
Reference voltage
6
1.225
V
VINADC
Input range
1
At Vref = 1.22V
0±1.22
V
R1
Oversampling ratio/Decimation Ratio
2
64
128
fovs
Oversampling frequency
3
1024/
2048
kHz
RES
Number of bits
16
bits
BW
Bandwidth
4
1
500
Hz
S/N
Signal to noise ratio
5
90
dB
Table 18. Bandgap Reference Voltage
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
REFTRIM
Reference Voltage after trim
1, 2
Trim at 65C
1.225
V
VREFACC
Reference Voltage Initial Accuracy
1, 2
At 65C
±3.5
mV
VREFDRIFT
Reference Voltage Temperature drift
Temperature range
-20 to 65 C
±0.4
%
Temperature range
-40 to 125 C
+0.4/
-0.6
%
PSRRREF
PSR @ dc
80
dB
SUTAVDD
Start Up Time with supply ramp
3
5ms
SUTPD
Start Up Time from power down
3
1ms
RNDVREF
Output resistance of band gap
500
1000
Ω
VNDVREF
Bandgap reference thermal noise density
3
300
nV/
√Hz
CLVREF
Output Capacitor (Ceramic)
100
nF
ESRVREF
0.02
1
Ω
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