参数资料
型号: XE8805AMI028LF
厂商: Semtech
文件页数: 43/156页
文件大小: 0K
描述: IC DAS 16BIT FLASH 8K MTP 64LQFP
标准包装: 160
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
包装: 托盘
供应商设备封装: 64-LQFP(10x10)
产品目录页面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
Semtech 2006
www.semtech.com
19-3
XE8805/05A
19.4
D/A specification
The D/A generates a voltage on node DAB_OUT that is proportional to the code RegDabIn in between the positive
reference voltage DAB_R_P and the negative reference voltage DAB_R_M. The voltage on DAB_R_P always has
to be larger than the voltage on DAB_R_M. The DAB is intended for very low frequency use. The specification is
given in Table 19-3.
The DAB is based on a resistive ladder. Capacitors larger than 100pF are allowed on the node DAB_OUT, but the
step response will increase proportionally.
sym
description
min
typ
max
unit
note
wda
number of input bits
8
bits
tstep
step response
0.25
1
ms
1
OR
D/A output range
DAB_R_M
DAB_R_P
refp
DAB_R_P range
VSS+2.3
VBAT
V
refn
DAB_R_M range
VSS
VBAT-2.3
V
Rdab
impedance between
DAB_R_P and DAB_R_M
1.6
Mohm
1.
Time to reach the final value within 5%, CL on DAB_OUT smaller than 100pF.
Table 19-3. D/A specification.
19.5
Amplifier specification
The amplifier output stage is a single transistor follower that is able to drive large currents. This transistor is not
connected internally so that different circuit configurations are possible (see next section). In order to guarantee
correct functionality, the voltage on the output pins has to respect the specifications VRAOP and VRAOM as indicated
in Table 19-4.
sym
description
min
typ
max
unit
Note
gain
gain at DC
60
90
dB
1
GBW
gain bandwidth product
100
4500
Hz
1
φ
m
phase margin
60
80
°
1
RL
resistive load
300
100000
CL
capacitive load
1
nF
CMR
common mode input range
VSS
VBAT
V
VRAOM
DAB_AOM voltage range
VSS+0.2
DAB_AOP-0.2
V
1
VRAOP
DAB_AOP voltage range
VSS+2.3
VBAT
V
1
Voff
offset
±10
mV
noise
integrated input noise
60
100
Vrm
s
Isource
max source current
10
40
mA
PSRR
power supply rejection ratio
80
dB
2
Ibias
quiescent bias current
5
10
A
Ioff
off current
0.1
1
A
1.
For all possible combinations of resistive load and capacitive load.
2.
At DC.
Table 19-4. Amplifier specification.
Not
Recommended
for
New
Designs
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