AD7912ARMZ

更新时间： 2024-02-05 10:57:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	386K
描述
2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-Bit A/D Converter

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AD7912ARMZ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	TSSOP,	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.52
最大模拟输入电压：	5.25 V	最小模拟输入电压：
最长转换时间：	0.777 µs	转换器类型：	ADC, SUCCESSIVE APPROXIMATION
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e4
长度：	2.9 mm	最大线性误差 (EL)：	0.0488%
湿度敏感等级：	1	模拟输入通道数量：	2
位数：	10	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	输出位码：	BINARY
输出格式：	SERIAL	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	采样速率：	1 MHz
采样并保持/跟踪并保持：	TRACK	座面最大高度：	1.1 mm
标称供电电压：	3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	1.6 mm	Base Number Matches：	1

AD7912ARMZ 数据手册

2-Channel, 2.35 V to 5.25 V,

1 MSPS, 10-/12-Bit ADCs

AD7912/AD7922

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Fast throughput rate: 1 MSPS

Specified for V_DDof 2.35 V to 5.25 V

Low power:

4.8 mW typ at 1 MSPS with 3 V supplies

15.5mW typ at 1 MSPS with 5 V supplies

Wide input bandwidth:

IN0

IN1

10-/12-BIT

SUCCESSIVE

APPROXIMATION

ADC

T/H

MUX

71 dB minimum SNR at 100 kHz input frequency

Flexible power/serial clock speed management

No pipeline delays

SCLK

High speed serial interface:

AD7912/AD7922

CONTROL LOGIC

SPI®/QSPI™/MICROWIRE™/DSP compatible

Standby mode: 1 µA maximum

Daisy-chain mode

DOUT

DIN

8-lead TSOT package

GND

8-lead MSOP package

Figure 1.

APPLICATIONS

Several AD7912/AD7922 can be connected together in a daisy

chain. The AD7912/AD7922 feature a daisy-chain mode that

allows the user to read the conversion results from the ADCs

contained in the chain. The AD7912/AD7922 use advanced

design techniques to achieve very low power dissipation at high

throughput rates. The reference for the part is taken internally

from V_DD, thereby allowing the widest dynamic input range to

the ADC.

Battery-powered systems:

Personal digital assistants

Medical instruments

Mobile communications

Instrumentation and control systems

Data acquisition systems

High speed modems

Optical sensors

PRODUCT HIGHLIGHTS

GENERAL DESCRIPTION

1. 2-channel, 1 MSPS, 10-/12-bit ADCs in TSOT package.

2. High throughput with low power consumption.

3. Flexible power/serial clock speed management.

The conversion rate is determined by the serial clock. The

parts also feature a power-down mode to maximize power

efficiency at lower throughput rates. Average power

consumption is reduced when the power-down mode is

used while not converting. Current consumption is 1 µA

maximum and 50 nA typically when in power-down mode.

4. Daisy-chain mode.

The AD7912/AD7922¹are 10-bit and 12-bit, high speed, low

power, 2-channel successive approximation ADCs, respectively.

The parts operate from a single 2.35 V to 5.25 V power supply

and feature throughput rates of up to 1 MSPS. The parts contain

a low noise, wide bandwidth track-and-hold amplifier, which

can handle input frequencies in excess of 6 MHz.

The conversion process and data acquisition are controlled

using

and the serial clock, allowing the devices to interface

with microprocessors or DSPs. The conversion rate is

determined by the SCLK signal. The input signal is sampled on

5. No pipeline delay.

The parts feature a standard successive approximation ADC

the falling edge of

and the conversion is also initiated at this

with accurate control of the sampling instant via a

and once-off conversion control.

input

point. The channel to be converted is selected through the DIN

pin, and the mode of operation is controlled by . The serial

data stream from the DOUT pin has a channel identifier bit and

mode identifier bit, which provide information about the

converted channel and the current mode of operation.

¹Protected by U.S. Patent Number 6,681,332.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

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