AD7689BCPZRL7
Analog to Digital Converters (ADC)
Technical Specifications
| Type | Description |
|---|---|
| Quiescent Current (Iq) | 50nA |
| Integral non - linearity | 0.4LSB |
| Voltage Reference | Built-in |
| Clock/Oscillator | Built-in |
| Resolution(Bits) | 250kHz;16 |
| S/N Ratio | 92.5dB |
| DNL (LSB) | 0.25LSB |
| ADC architecture | SAR |
| Type | Description |
|---|---|
| Programmable Gain | - |
| Operating Temp | -40°C ~ +85°C |
| Interface | SPI |
| Working Voltage V | 3.9 V |
| Channels | 8.0 |
| Maximum Clock Speed | - |
| Features | Bipolar input;Multiplexers;Built-in temperature sensor |
| Package / Case | LFCSP-20 |
Product Introduction
The AD7682/AD7689 are 4/8-channel, 16-bit, charge redistribution successive approximation register (SAR) ADCs operating from a single VDD supply.
The AD7682/AD7689 contain all the components needed for a multichannel, low power data acquisition system, including: a true 16-bit, no missing codes SAR ADC; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer for configuring inputs as single-ended (with or without reference ground), differential, or bipolar; an internal low drift voltage reference (selectable at 2.5V or 4.096V) and buffer; a temperature sensor; an optional single-pole filter; and a sequencer that is especially useful when multiple channels are sampled sequentially.
The AD7682/AD7689 use a simple SPI interface for writing to the configuration register and retrieving conversion results. The SPI interface operates from a separate supply (VIO), which is set to the host logic level. Power consumption is proportional to throughput rate.
The AD7682/AD7689 are available in a compact 20-lead LFCSP package and are rated for operation over the −40°C to +85°C temperature range.
Features
- 16-bit resolution, no missing codes
- 4-channel (AD7682) / 8-channel (AD7689) multiplexer with selectable inputs: unipolar single-ended, differential (with reference GND), pseudo-bipolar
- Throughput rate: 250 kSPS
- INL: typical ±0.4 LSB, maximum ±1.5 LSB (±23 ppm of FSR)
- Dynamic range: 93.8 dB
- SINAD: 92.5 dB (20 kHz)
- THD: −100 dB (20 kHz)
- Analog input range: 0 V to VREF, VREF up to VDD
- Multiple reference options: internal selectable 2.5 V or 4.096 V reference; external buffered reference (up to 4.096 V); external reference (up to VDD)
- Internal temperature sensor (TEMP)
- Channel sequencer, selectable 1-pole filter, busy indicator
- No pipeline delay, SAR architecture
- Single-supply operation: 2.3 V to 5.5 V; logic interface voltage: 1.8 V to 5.5 V
- Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP
- Power consumption: 3.5 mW (2.5 V / 200 kSPS), 12.5 mW (5 V / 250 kSPS)
- Standby current: 50 nA
- Cost-reduced grade available
- 20-lead 4 mm × 4 mm LFCSP package
Applications
- - Multi-channel system monitoring - Battery-powered devices - Medical instruments: ECG/EKG - Mobile communications: GPS - Power line monitoring - Data acquisition - Seismic data acquisition systems - Instrumentation - Process control
Datasheet
Alternative Parts
Common AD7689BCPZRL7 alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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