Datasheet > ADUC7126BSTZ126

ADUC7126BSTZ126

更新时间： 2024-01-23 19:46:50

品牌	Logo	应用领域
亚德诺 - ADI		时钟微控制器外围集成电路
页数	文件大小	规格书
110页	1497K
描述
Precision Analog Microcontroller, 12-Bit Analog I/O, Large Memory, ARM7TDMI MCU with Enhanced IRQ Handler

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技术参数
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ADUC7126BSTZ126 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	ROHS COMPLIANT, MO-026BDD, LQFP-80	针数：	80
Reach Compliance Code：	compliant	ECCN代码：	3A991.A.2
HTS代码：	8542.31.00.01	风险等级：	5.31
具有ADC：	YES	地址总线宽度：
位大小：	32	CPU系列：	ARM7
最大时钟频率：	41.78 MHz	DAC 通道：	YES
DMA 通道：	NO	外部数据总线宽度：
JESD-30 代码：	S-PQFP-G80	JESD-609代码：	e3
长度：	12 mm	湿度敏感等级：	1
I/O 线路数量：	40	端子数量：	80
最高工作温度：	125 °C	最低工作温度：	-40 °C
PWM 通道：	YES	封装主体材料：	PLASTIC/EPOXY
封装代码：	LFQFP	封装等效代码：	QFP80,.55SQ,20
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	260	电源：	3/3.3 V
认证状态：	Not Qualified	RAM（字节）：	32768
ROM（单词）：	129024	ROM可编程性：	FLASH
座面最大高度：	1.6 mm	速度：	41.78 MHz
子类别：	Microcontrollers	最大供电电压：	3.6 V
最小供电电压：	2.7 V	标称供电电压：	3.3 V
表面贴装：	YES	技术：	CMOS
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	30
宽度：	12 mm	uPs/uCs/外围集成电路类型：	MICROCONTROLLER, RISC
Base Number Matches：	1

ADUC7126BSTZ126 数据手册

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ADuC7124/ADuC7126

Data Sheet

For example, do not power components on the analog side (as

seen in Figure 66b) with IOV_DDbecause that forces return

currents from IOV_DDto flow through AGND. Avoid digital

currents flowing under analog circuitry, which can occur if a

noisy digital chip is placed on the left half of the board (shown

in Figure 66c). If possible, avoid large discontinuities in the

ground plane(s), such as those formed by a long trace on the same

layer, because they force return signals to travel a longer path.

In addition, make all connections to the ground plane directly,

with little or no trace separating the pin from its via to ground.

GROUNDING AND BOARD LAYOUT

RECOMMENDATIONS

As with all high resolution data converters, special attention

must be paid to grounding and PC board layout of the

ADuC7124/ADuC7126-based designs to achieve optimum

performance from the ADCs and DAC.

Although the part has separate pins for analog and digital ground

(AGND and IOGND), the user must not tie these to two sepa-

rate ground planes unless the two ground planes are connected

very close to the part. This is illustrated in the simplified example

shown in Figure 66a. In systems where digital and analog

ground planes are connected together somewhere else (at the

power supply of the system, for example), the planes cannot be

reconnected near the part because a ground loop results. In these

cases, tie all the ADuC7124/ADuC7126 AGND and IOGND

pins to the analog ground plane, as illustrated in Figure 66b.

In systems with only one ground plane, ensure that the digital

and analog components are physically separated onto separate

halves of the board so that digital return currents do not flow

near analog circuitry (and vice versa).

When connecting fast logic signals (rise/fall time < 5 ns) to any of

the ADuC7124/ADuC7126 digital inputs, add a series resistor

to each relevant line to keep rise and fall times longer than 5 ns

at the input pins of the part. A value of 100 Ω or 200 Ω is

usually sufficient to prevent high speed signals from coupling

capacitively into the part and affecting the accuracy of ADC

conversions.

CLOCK OSCILLATOR

The clock source for the ADuC7124/ADuC7126 can be gener-

ated by the internal PLL or by an external clock input. To use

the internal PLL, connect a 32.768 kHz parallel resonant crystal

between XCLKI and XCLKO, and connect a capacitor from

each pin to ground as shown in Figure 67. The crystal allows the

PLL to lock correctly to give a frequency of 41.78 MHz. If no

external crystal is present, the internal oscillator is used to give

a typical frequency of 32.768 kHz 3ꢀ.

The ADuC7124/ADuC7126 can then be placed between the

digital and analog sections, as illustrated in Figure 66c.

PLACE ANALOG

COMPONENTS HERE

PLACE DIGITAL

COMPONENTS HERE

ADuC7124/

ADuC7126

XCLKI

AGND

DGND

12pF

32.768kHz

INTERNAL

PLL

12pF

XCLKO

PLACE ANALOG

COMPONENTS

HERE

PLACE DIGITAL

COMPONENTS HERE

Figure 67. External Parallel Resonant Crystal Connections

To use an external source clock input instead of the PLL (see

Figure 68), Bit 1 and Bit 0 of PLLCON must be modified. The

external clock uses P0.7 and XCLK.

AGND

DGND

ADuC7124/

ADuC7126

XCLKO

PLACE ANALOG

COMPONENTS HERE

PLACE DIGITAL

COMPONENTS HERE

XCLKI

EXTERNAL

CLOCK

SOURCE

FREQUENCY

DIVIDER

DGND

XCLK

Figure 68. Connecting an External Clock Source

Figure 66. System Grounding Schemes

Using an external clock source, the ADuC7124/ADuC7126

specified operational clock speed range is 50 kHz to 41.78 MHz

1ꢀ, which ensures correct operation of the analog peripherals

and Flash/EE.

In all of these scenarios, and in more complicated real-life

applications, the users should pay particular attention to the

flow of current from the supplies and back to ground. Make

sure the return paths for all currents are as close as possible to

the paths the currents took to reach their destinations.

Rev. D | Page 104 of 110

1...101 102 103104105 106 107...110

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与ADUC7126BSTZ126相关器件

型号	品牌	获取价格	描述	数据表
ADUC7126BSTZ126I	ADI	获取价格	Precision Analog Microcontroller, 12-Bit Analog I/O, Large Memory, ARM7TDMI MCU with Enhan
ADUC7126BSTZ126IRL	ADI	获取价格	Precision Analog Microcontroller, 12-Bit Analog I/O, Large Memory, ARM7TDMI MCU with Enhan
ADUC7126BSTZ126-RL	ADI	获取价格	Precision Analog Microcontroller, 12-Bit Analog I/O, Large Memory, ARM7TDMI MCU with Enhan
ADUC7128	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-bit ADC & DDS DAC
ADUC7128_15	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
ADUC7128BCPZ1262	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
ADUC7128BCPZ126-RL2	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
ADUC7128BSTZ126	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI® MCU with 12-Bit ADC and DDS DAC
ADUC7128BSTZ1262	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
ADUC7128BSTZ126-RL	ADI	获取价格	Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC

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