Datasheet for AD7944:
- Manufacturer Part Number : AD7944
- Manufacturer : AD
- Description : 14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
- Series : AD7944
- Reference Price : USD 8.232
- Our Price : We have a better price, contact us by email
- Product Type : Precision A/D Converters
- Function : Single Channel A/D Converters
- Current Suggest : Production
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : AD7944
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- 14-bit resolution with no missing codes
- Throughput: 2.5 MSPS (TURBO high), 2.0 MSPS (TURBO low)
- Low power dissipation
15.5 mW at 2.5 MSPS, with external reference
28 mW at 2.5 MSPS, with internal reference - INL: ±0.25 LSB typical, ±1.0 LSB maximum
- SNR
84 dB, with on-chip reference
84.5 dB, with external reference - 4.096 V internal reference: typical drift of ±10 ppm/°C
- Pseudo differential analog input voltage range
0 V to VREF with VREF up to 5.0 V
Allows use of any input range - No pipeline delay
- Logic interface: 1.8 V/2.5 V/
2.7 V - Serial interface: SPI-/QSPI-/MICROWIRE-/
DSP-compatible - Ability to daisy-chain multiple ADCs with busy indicator
- 20-lead, 4 mm × 4 mm LFCSP (QFN)
The AD7944 is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7944 samples an analog input, IN+, between 0 V and VREF with respect to a ground sense, IN−. The AD7944 features avery high sampling rate turbo mode (TURBO high) and areduced power normal mode (TURBO low) for low powerapplications where the power is scaled with the throughput.
In normal mode (TURBO low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chainseveral ADCs on a single 3-wire bus and provide an optional busyindicator. The serial interface is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.
The AD7944 is available in a 20-lead LFCSP with operationspecified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Communications
- ATE
- Data acquisition systems
- Medical instruments
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
