AD7997 内置I2C兼容接口的8通道、10位ADC，采用20引脚TSSOP封装

AD7997: 内置I2C兼容接口的8通道、10位ADC，采用20引脚TSSOP封装

AD7997是一款8通道、10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。

AD7997提供与I^2C接口兼容的双线式串行接口。该器件有两个版本：AD7997-0和AD7997-1,每个版本允许最少使用两个不同I^2C地址。AD7997-0上的I^2C接口支持标准和快速I^2C两种接口模式。AD7997-1上的I^2C接口支持标准、快速及两种高速I^2C接口模式。

The AD7997 is an 8 channel, 10-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 AD7997 provides a two-wire serial interface, which is compatible with I^2C interfaces. The part come in two versions, AD7997-0 and AD7997-1. Each version allows for a minimum of two different I^2C addresses. The I^2C interface on the AD7997-0 supports Standard and Fast I^2C Interface Modes. The I^2C Interface on the AD7997-1 supports Standard, Fast and two High-Speed I^2C Interface Modes.

AD7997 特点

10-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
10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
I^2C(R)兼容型串行接口
I^2C(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

AD7997 技术指标

Resolution (Bits): 10bit
# 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

AD7997 建议配套产品

Recommended Input Buffer Amplifiers for the AD7997
- 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.

AD7997 功能框图

AD7997 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7997BRU-0	量产	20 ld TSSOP	20	工业
AD7997BRU-0REEL	量产	20 ld TSSOP	20	工业
AD7997BRU-1	量产	20 ld TSSOP	20	工业
AD7997BRU-1REEL	量产	20 ld TSSOP	20	工业
AD7997BRUZ-0	量产	20 ld TSSOP	20	工业
AD7997BRUZ-0REEL	量产	20 ld TSSOP	20	工业
AD7997BRUZ-1	量产	20 ld TSSOP	20	工业
AD7997BRUZ-1REEL	量产	20 ld TSSOP	20	工业
EVAL-AD7997EBZ	量产	评估板	-	待定