AD7739:8通道、4 kHz、24位Σ-Δ型ADC

AD7739: 8通道、4 kHz、24位Σ-Δ型ADC

AD7739是一款高精度、高吞吐量模拟前端,可实现真16位峰－峰值分辨率及250 µs总转换时间（4 kHz通道切换）,非常适合高分辨率多路复用应用。

AD7739采用Σ-Δ架构,具有最高24位无失码性能。用户可通过简易数字接口对该器件进行配置,从而平衡噪声性能与数据吞吐量,实现最高15.4 kHz的转换速率。该模拟前端可配置为8个单端输入或4个全差分输入通道,输入范围包括单极性或双极性625 mV、1.25 V和2.5 V,以及从AGND+200 mV至AVDD-300 mV的共模输入电压。此款ADC支持按通道进行系统校准选项。数字串行接口可配置用于三线式操作,并且与微控制器和数字信号处理器兼容。所有接口输入均为施密特触发式。该器件的额定温度范围为扩展工业温度范围：–40°C至+105°C,采用24引脚TSSOP封装。

The AD7739 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with a total conversion time of 250 µs (4 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.

The AD7739 is based on a sigma-delta architecture and features up to 24 bits of no missing codes performance. The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz conversion rate. The analog front end features 8 single-ended or 4 fully differential input channels with unipolar or bipolar 625 mV, 1.25 V and 2.5 V input ranges and accepts a common mode input voltage from 200 mV above AGND to AVDD-300 mV. The ADC supports per channel system calibration options.The digital serial interface can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.The part is specified for operation over the extended industrial temperature range of -40ºC to +105ºC and is available in 24-lead TSSOP package.

AD7739 特点

高分辨率ADC：
- 24位无失码
- ±0.0015%非线性度
优化快速通道开关：
- 18位峰－峰值分辨率（21位有效位、500 Hz）
- 16位峰－峰值分辨率（19位有效位、4 Hz）
- 片内按通道系统校准
可配置输入：8个单端输入或4个全差分输入
输入范围：- +625 mV、±625 mV、+1.25 V、±1.25 V、+2.5 V、±2.5 V
三线式串行接口：
- SPI®、QSPI™、MICROWIRE™、DSP兼容
- 施密特触发器逻辑输入
单电源工作：
- 5 V模拟电源
- 3 V或5 V数字电源
封装：24引脚TSSOP
High resolution ADC
- 24 bits no missing codes
- ±0.0015% Nonlinearity
Optimized for Fast Channel Switching
- 18-Bits p-p Resolution (21 Bits Effective) at 500 Hz
- 16-Bits p-p Resolution (19 Bits Effective) at 4 kHz
- On-Chip Per Channel System Calibration
Configurable Inputs 8 Single-Ended or 4 Fully Differential
Input Ranges- +625 mV, ±625 mV, +1.25 V, ±1.25 V, +2.5 V, ±2.5 V
3-Wire Serial Interface SPI®, QSPI™, MICROWIRE™ and DSP Compatible
- Schmitt Trigger on Logic Inputs
Single-Supply Operation
- 5 V Analog Supply
- 3 V or 5 V Digital Supply
Package: 24-Lead TSSOP

AD7739 技术指标

Resolution (Bits): 24bit
# Chan: 8
Sample Rate: 3.05MSPS
Interface: SPI,Ser
Analog Input Type: SE-Uni,SE-Bip,Diff-Uni,Diff-Bip
Ain Range: Uni 2.5V,Uni 1.25,Uni 0.625,Bip 2.5V,Bip 1.25,Bip 0.625
ADC Architecture: Sigma-Delta
Pkg Type: SOP

AD7739 功能框图

AD7739 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7739BRU	量产	24 ld TSSOP	24	工业
AD7739BRU-REEL	量产	24 ld TSSOP	24	工业
AD7739BRUZ	量产	24 ld TSSOP	24	工业
AD7739BRUZ-REEL7	量产	24 ld TSSOP	24	工业
EVAL-AD7739EBZ	量产	评估板	-	待定