参数资料
型号: TMDXBDKFP5515
厂商: Texas Instruments
文件页数: 134/159页
文件大小: 0K
描述: KIT DEV FINGERPRINT C5515
标准包装: 1
传感器类型: 指纹
接口: USB
电源电压: 5V
嵌入式: 是,MCU,16 位
已供物品: 板,扩展板,线缆,迷你型 DVD,传感器
已用 IC / 零件: C5515
产品目录页面: 718 (CN2011-ZH PDF)
其它名称: 296-27452
SPRS645F – AUGUST 2010 – REVISED OCTOBER 2013
5.16 10-Bit SAR ADC
The device includes a 10-bit SAR ADC using a switched capacitor architecture which converts an analog
input signal to a digital value at a maximum rate of 62.5-k samples per second (ksps) for use by the DSP.
This SAR module supports six channels that are connected to four general purpose analog pins (GPAIN
[3:0]) which can be used as general purpose outputs.
The device SAR supports the following features:
?
?
?
?
?
?
?
Up to 62.5 ksps (2-MHz clock with 32 cycles per conversion)
Single conversion and continuous back-to-back conversion modes
Interrupt driven or polling conversion or DMA event generation
Internal configurable bandgap reference voltages of 1 V or 0.8 V; or external V ref of V DDA_ANA
One 3.6-V Tolerant analog input (GPAIN0) with internal voltage division for conversion of battery
voltage
Software controlled power down
Individually configurable general-purpose digital outputs
5.16.1 SAR ADC Peripheral Register Descriptions
Table 5-43 shows the SAR ADC peripheral registers.
Table 5-43. SAR Analog Control Registers
CPU WORD
ADDRESS
7012h
7014h
7016h
7018h
701Ah
ACRONYM
SARCTRL
SARDATA
SARCLKCTRL
SARPINCTRL
SARGPOCTRL
REGISTER DESCRIPTION
SAR A/D Control Register
SAR A/D Data Register
SAR A/D Clock Control Register
SAR A/D Reference and Pin Control Register
SAR A/D GPO Control Register
5.16.2 SAR ADC Electrical Data/Timing
Table 5-44. Switching Characteristics Over Recommended Operating Conditions for ADC Characteristics
CV DD = 1.3 V
NO.
PARAMETER
CV DD = 1.05 V
MIN
TYP
MAX
UNIT
1
3
4
5
6
7
8
9
t C(SCLC)
t d(CONV)
S DNL
S INL
Z set
F set
Cycle time, ADC internal conversion clock
Delay time, ADC conversion time
Static differential non-linearity error (DNL measured for 9 bits)
Static integral non-linearity error
Zero-scale offset error (INL measured for 9 bits)
Full-scale offset error
Analog input impedance
Signal-to-noise ratio
1
±0.6
±1
54
2
32t C(SCLC)
2
2
MHz
ns
LSB
LSB
LSB
LSB
M ?
dB
134
Peripheral Information and Electrical Specifications
Product Folder Links: TMS320C5515
Copyright ? 2010–2013, Texas Instruments Incorporated
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