AD7734:4通道、±10 V输入范围、24位Σ-Δ型ADC

AD7734: 4通道、±10 V输入范围、24位Σ-Δ型ADC

AD7734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500 µs总转换时间（2 kHz通道切换）,非常适合高分辨率多路复用应用。

AD7734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12.3 kHz的转换速率。该模拟前端具有4个单端输入通道,采用5 V单模拟电源供电时,可接受最高±10 V的单极性或真双极性输入范围。AD7734拥有超量程和欠量程检测功能,在不降低邻近通道性能的同时,可接受最高±16.5 V过压模拟输入。差分基准电压输入具有“无基准电压”检测功能。AD7734包含自校准和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–40°C至+105°C扩展工业温度范围,采用28引脚TSSOP封装。

The AD7734 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.

The AD7734 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 12.3 kHz conversion rate. The analog front end features 4 single-ended input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single 5 V analog supply. The part has an over-range and under-range detection capability and accepts an analog input over-voltage to ±16.5 V not degrading the performance of the adjacent channels. The differential reference input features “No Reference” detect capability.The AD7734 contains self-calibration and 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 28-lead TSSOP package.

AD7734 特点

高分辨率ADC：
- 24位无失码
- ±0.0025%非线性度
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：28引脚TSSOP
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、2 kHz）
- 14位峰－峰值分辨率（18位有效位、15 kHz）
- 片内按通道系统校准
4个单端模拟输入：
- 输入范围：+5 V、±5 V、+10 V、±10 V
- 耐过压
- 最高±16.5 V（不影响邻近通道时）
- 绝对最高电压可达±50 V
High resolution ADC
- 24 bits no missing codes
- ±0.0025% nonlinearity
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: 28-lead TSSOP
Optimized for fast channel switching
- 18-bit p-p resolution (21 bits effective) at 500 Hz
- 16-bit p-p resolution (19 bits effective) at 2 kHz
- 14-bit p-p resolution (18 bits effective) at 15 kHz
- On-chip per channel system calibration
4 single-ended analog inputs
- Input ranges +5 V, ±5 V, +10 V, ±10 V
- Overvoltage tolerant
- Up to ±16.5 V not affecting adjacent channel
- Up to ±50 V absolute maximum

AD7734 技术指标

Resolution (Bits): 24bit
# Chan: 4
Sample Rate: 3.05MSPS
Interface: Ser,SPI
Analog Input Type: SE-Bip,SE-Uni
Ain Range: Bip 10V,Bip 5.0V,Uni 10V,Uni 5.0V
ADC Architecture: Sigma-Delta
Pkg Type: SOP

AD7734 功能框图

AD7734 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7734BRU	Prodn	28 ld TSSOP	28	工业
AD7734BRUZ	Prodn	28 ld TSSOP	28	工业
AD7734BRUZ-REEL	Prodn	28 ld TSSOP	28	工业
AD7734BRUZ-REEL7	Prodn	28 ld TSSOP	28	工业
EVAL-AD7734EBZ	Prodn	EVALUATION BOARDS	-	待定