AD7643
PRODUCTION18-Bit, 1.25 MSPS PulSAR® A/D Converter
- Part Models
- 4
- 1ku List Price
- Starting From $25.80
Part Details
- Throughput: 1.25 MSPS
- INL: ±2 LSB typical, ±3 LSB max; ±8 ppm of full scale
- 18-bit resolution with no missing codes
- Dynamic range: 95.5 dB
- SINAD: 93.5 dB typical @ 20 kHz (VREF = 2.5 V)
- THD: −112 dB typical @ 20 kHz (VREF = 2.5 V)
- No pipeline delay (SAR architecture)
- Pb-free, 48-lead LQFP and 48-lead LFCSP
- Pin compatible with the AD7641 and other PulSAR ADC’s
- 2.048 V internal reference: typical drift 10 ppm/°C; TEMP output
- Differential input range: ±VREF
(VREF up to 2.5 V) - Parallel (18-, 16-, or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface
- SPI®/QSPI™/MICROWIRE™/DSP compatible
- Single 2.5 V supply operation
- Power dissipation
- 65 mW typical @ 1.25 MSPS with internal REF
- 2 μW in power-down mode
The AD7643 is an 18-bit, 1.25 MSPS, charge redistribution SAR, fully differential, analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. The part contains a high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. The part has no latency and can be used in asynchronous rate applications. The AD7643 is hardware factory calibrated and tested to ensure ac parameters, such as signal-to-noise ratio (SNR), in addition to the more traditional dc parameters of gain, offset, and linearity. The AD7643 is available in Pb-free only packages with operation specified from −40°C to +85°C.
PRODUCT HIGHLIGHTS
- Fast Throughput. The AD7643 is a 1.25MSPS, charge redistribution, 18-bit SAR ADC.
- Superior Linearity. The AD7643 has no missing 18-bit code.
- Internal Reference. The AD7643 has a 2.048 V internal reference with a typical drift of ±10 ppm/°C and an on-chip TEMP sensor.
- Single-Supply Operation. The AD7643 operates from a 2.5 V single supply.
- Serial or Parallel Interface. Versatile parallel (18-, 16-, or 8-bit bus) or 2-wire serial interface arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.
APPLICATIONS
- Medical instruments
- High speed data acquisition/high dynamic data acquisition
- Digital signal processing
- Spectrum analysis
- Instrumentation
- Communications
- ATE
Documentation
Data Sheet 1
Application Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7643BCPZ | 48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP) | ||
| AD7643BCPZRL | 48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP) | ||
| AD7643BSTZ | 48-Lead LQFP (7mm x 7mm) | ||
| AD7643BSTZRL | 48-Lead LQFP (7mm x 7mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 9, 2021 - 20_0126 Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea |
||
| AD7643BCPZ | PRODUCTION | |
| AD7643BCPZRL | PRODUCTION | |
|
Sep 13, 2017 - 16_0077 CANCELLED: Conversion of Select 4x4, 5x5, 6x6 and 7x7mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE Korea. |
||
| AD7643BCPZ | PRODUCTION | |
| AD7643BCPZRL | PRODUCTION | |
|
Oct 18, 2016 - 16_0034 Assembly Relocation of Select LQFP,LQFP_EP,MQFP,TQFP,TQFP_EP Products to Stats ChipPAC China Jiangyin |
||
| AD7643BSTZ | PRODUCTION | |
| AD7643BSTZRL | PRODUCTION | |
|
Jan 5, 2009 - 07_0077 Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages |
||
| AD7643BSTZ | PRODUCTION | |
| AD7643BSTZRL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Fully Differential Amplifiers 1 | ||
| AD8475 | PRODUCTION | Precision, Selectable Gain, Fully Differential Funnel Amplifier |
| High Voltage Op Amps ≥12V 2 | ||
| ADA4899-1 | PRODUCTION | Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage Noise, High Speed Op Amp |
| AD8022 | PRODUCTION | Dual High Speed, Low Noise Op Amp |
| Low Power Op Amps (≤ 1mA/amp) 2 | ||
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| AD8032 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Dual Amplifier |
| Micropower Voltage References 1 | ||
| ADR291 | PRODUCTION | Low Noise Micropower Precision Voltage Reference (2.5 V) |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 2 | ||
| ADA4841-1 | PRODUCTION | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| AD8021 | PRODUCTION | Low Noise, High Speed Amplifier for 16-Bit Systems |
| Series Voltage References 3 | ||
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| AD1582 | PRODUCTION | 2.5V Micropower, Precisions Series Mode Voltage References |
| Shunt Voltage References 1 | ||
| AD780 | PRODUCTION | 2.5 V/3.0 V High Precision Reference |
| Single-Ended to Differential Amplifiers 2 | ||
| AD8139 | RECOMMENDED FOR NEW DESIGNS | Low Noise, Rail-to-Rail, Differential ADC Driver |
| ADA4930-1 | RECOMMENDED FOR NEW DESIGNS |
Ultralow Noise Drivers for Low Voltage ADCs |
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD4003 | PRODUCTION | 18-Bit, 2 MSPS/1 MSPS/500 kSPS, Easy Drive, Differential SAR ADCs |
Evaluation Kits
AD7643 Evaluation Kit