AD7691集成電路（IC）的模數轉換器（ADC）規(guī)格書PDF中文資料

AD7691屬于集成電路（IC）的模數轉換器（ADC）。由亞德諾半導體技術有限公司制造生產的AD7691模數轉換器（ADC）模數轉換器（ADC、A/D 或 A 轉 D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉換為數字信號。一般來說，數字輸出是二進制補碼二進制數，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數轉換器可按照位數、采樣率、輸入數、接口、轉換器數和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。

GENERAL DESCRIPTION

The AD76911 is an 18-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V and 5 V. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN? pins. The voltages on these pins swing in opposite phases between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.

FEATURES

18-bit resolution with no missing codes

Throughput: 250 kSPS

INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR)

Dynamic range: 102 dB typical at 250 kSPS

Oversampled dynamic range: 125 dB at1 kSPS

Noise-free code resolution: 20 bits at 1 kSPS

Effective resolution: 22.7 bits at 1 kSPS

SINAD: 101.5 dB typical at 1 kHz

THD: ?125 dB typical at 1 kHz

True differential analog input range: ±VREF

0 V to VREF with VREF up to VDD on both inputs

No pipeline delay

Single-supply 2.3 V to 5 V operation with

1.8 V/2.5 V/3 V/5 V logic interface

Proprietary serial interface

SPI/QSPI/MICROWIRE?/DSP compatible

Ability to daisy-chain multiple ADCs

Optional busy indicator feature

Power dissipation

1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS

1.4 μW at 2.5 V/100 SPS

Standby current: 1 nA

10-lead packages: MSOP (MSOP-8 size) and

3 mm × 3 mm LFCSP (SOT-23 size)

Pin-for-pin compatible with the18-bit AD7690 and

16-bit AD7693, AD7688, and AD7687

APPLICATIONS

Battery-powered equipment

Data acquisitions

Seismic data acquisition systems

Instrumentation

Medical instruments