AD7998 内置I2C兼容接口的8通道、12位ADC，采用20引脚TSSOP封装

AD7998: 内置I2C兼容接口的8通道、12位ADC，采用20引脚TSSOP封装

AD7998是一款8通道、12位、高速、低功耗、逐次逼近型ADC，采用2.7 V至5.5 V单电源供电，转换时间为2微秒（us）。该器件内置8通道多路复用器和采样保持放大器。AD7998提供与I2C接口兼容的双线式串行接口。该器件有两个版本：AD7998-0和AD7998-1，每个版本允许最少使用两个不同的I2C地址。AD7998-0上的I2C接口支持标准和快速I2C两种接口模式。AD7998-1上的I2C接口支持标准、快速及两种高速I2C接口模式。

The AD7998 is an 8 channel, 12-bit, high speed, low power, successive-approximation ADC. The part operates from a single 2.7 V to 5.5 V power supply and features a conversion time of 2 us. The part contains an eight channel multiplexer and track/hold amplifier.

The AD7998 provides a two-wire serial interface, which is compatible with I^2C interfaces. Each part comes in two versions, AD7998-0 and AD7998-1. Each version allows for a minimum of two different I^2C addresses. The I^2C interface on the AD7998-0 supports Standard and Fast I^2C Interface Modes. The I^2C Interface on the AD7998-1 supports Standard, Fast and two High-Speed I^2C Interface Modes.

AD7998 特性

12位ADC，具有快速转换时间：2 us
8个单端模拟输入通道
额定电压（VDD）：2.7 V至5.5 V
低功耗
高吞吐量：188 kSPS
序列器操作
自动循环模式
I2C(R)兼容型串行接口
I2C(R)接口支持：标准、快速及高速模式
超量程指示
可通过AS引脚选择寻址
自动关断模式：最大1 uA
12-Bit ADC with Fast Conversion Time: 2 us
Eight Single-Ended Analog Input Channels
Specified for VDD of 2.7 V to 5.5 V
Low Power Consumption
Fast Throughput Rate: - 188 kSPS
Sequencer Operation
Automatic Cycle Mode
I^2C(R) Compatible Serial Interface
I^2C(R) Interface supports:Standard, Fast, and High-Speed Modes
Out of Range Indicator
Pin-Selectable Addressing via AS
Automatic Shutdown Mode: - 1 uA max

AD7998 技术指标

Resolution (Bits): 12bit
# Chan: 8
Sample Rate: 79kSPS
Interface: I^2C/Ser 2-Wire,Ser
Analog Input Type: SE-Uni
Ain Range: Uni (Vref)
ADC Architecture: SAR
Pkg Type: SOP

AD7998 功能框图

Recommended Input Buffer Amplifiers for the AD7998
- For low distortion, low noise, dual supplies, we recommend the AD8599.
- For precision, low noise, single supply, we recommend the AD8605 family of operational amplifiers.
- For single supply, high speed, low power, we suggest the AD8031 or the dual AD8032.
- For precision, high speed, low cost, we recommend the quad AD8604.
Recommended External References - 2.5V for the AD7997
- For applications requiring best accuracy, low noise, low drift, we recommend the ADR421 or AD780.
- For low noise, high output current applications, we recommend the ADR431.
- For wide supply applications, we recommend the ADR03 or AD780.
- For cost sensitive applications, we suggest the AD1582, ADR381 or ADR391.
- For the reference buffer amplifier, we recommend the AD8605.
- For applications requiring 2.048V to 4.096V, we recommend the REF191 reference family.
Recommended Digital Isolators for the AD7997
- For dual I2C isolators, we recommend the ADuM1250, ADuM1251, ADuM2250 or the ADuM2251.
Recommended Power Solutions
- For selecting voltage regulator products, use ADIsimPower.
- For selecting supervisor products, use the Supervisor Parametric Search.

AD7998 功能框图

AD7998 芯片订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
AD7998BRU-0 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 4.81	$ 4.10	否
AD7998BRU-0REEL 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 2500	-	$ 4.10	否
AD7998BRU-1 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 5.16	$ 4.39	否
AD7998BRU-1REEL 产品状态: 停产	20 ld TSSOP	20	工业	Reel, 2500	-	-	否
AD7998BRUZ-0 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 4.17	$ 3.54	是
AD7998BRUZ-0REEL 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 2500	-	$ 3.54	是
AD7998BRUZ-1 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 4.46	$ 3.80	是
AD7998BRUZ-1REEL 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 2500	-	$ 3.80	是
EVAL-AD7998EBZ 产品状态: 量产	评估板	-		1	$ 150.00	$ 150.00	是