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Los diseñadores de alta cuenta de canales , datos de alta precisión , inevitablemente, sistemas de adquisición de afrontar los retos de reducir al mínimo el consumo de energía y la reducción de la huella de diseño. El logro de rendimiento máximo del sistema en estas circunstancias requiere ya sea multiplexado de alta velocidad, centros de retención de resolución , que generan más calor, o de baja velocidad múltiples, centros de retención de resolución , que ocupan espacio en la placa adicional. Con unos niveles de disipación de potencia de casi 15 veces más bajos que la competencia y una huella más pequeña , el AD7986 elimina la necesidad de transacciones tales . Ahora gran densidad de canales y alta resolución se puede lograr sin incurrir en una pena de calor o de tamaño, lo que le permite sacar más provecho de su diseño.
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: 18-Bit, 2 MSPS PulSAR 15 mW ADC in QFN
Product Status Production 
The AD7986 is an 18-bit, 2 MSPS successive approximation, analog-to-digital converter (ADC). It contains a low power, high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On rising edge of CNV, the AD7986 samples the voltage difference between the IN+ and IN− pins. The voltages on these ...More
AD7986: 18-Bit, 2 MSPS PulSAR 15 mW ADC in QFN
Product Description
The AD7986 is an 18-bit, 2 MSPS successive approximation, analog-to-digital converter (ADC). It contains a low power, high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On rising edge of CNV, the AD7986 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and REF. It features a very high sampling rate turbo mode (TURBO=high) and a reduced power normal mode (TURBO=low) for low power applications 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 daisychain several ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 3 V using the separate VIO supply.
The AD7986 is available in a 20-lead QFN (LFCSP) with operation specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Data acquisition systems
- Medical instruments
- Seismic data acquisition systems
DATA SHEET
RESOURCES & TOOLS
TECHNICAL DOCUMENTATION
- 18-bit resolution with no missing codes
- Throughput: 2 MSPS (TURBO=high)
1.5 MSPS (TURBO=low) - Low power dissipation:
15 mW at 2 MSPS, with external reference
26mW at 2 MSPS with internal reference - INL: ±2 LSB
- SNR: 95.5 dB, with on chip reference
97 dB, with external reference - 4.096 V internal reference: typ drift 10 ppm/°C
- True differential analog input range: ±REF
0 V to VREF with VREF up to 5.0 V - Please see data sheet for additional features
- Resolution (Bits): 18bit
- Throughput Rate: 2MSPS
- # Chan: 1
- Supply V: Multi(+5, +2.5, +1.8-2.7)
- Pwr Diss: 29mW
- Interface: Ser,SPI
- Ain Range: (2Vref) p-p
- SNR (dB): 95.5dB
- Pkg Type: CSP
Functional Block Diagram for AD7986
18-Bit, 2 MSPS PulSAR 15 mW ADC in QFN
Functional Block Diagram for AD7986
AD7985: 16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN |
Product Status Production
The AD7985 is a 16-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 16-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 AD7985 samples an analog input, IN+, between 0 V and REF with respect to a ground ...More
AD7985: 16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN
Product Description
The AD7985 is a 16-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 16-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 AD7985 samples an analog input, IN+, between 0 V and REF with respect to a ground sense, IN−. The AD7985 features a very high sampling rate turbo mode (TURBO is high) and a reduced power normal mode (TURBO is low) for low power applications where the power is scaled with the throughput.
In normal mode (TURBO is low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.
The AD7985 is available in a 20-lead LFCSP with operation specified from −40°C to +85°C.
Applications
- Battery-powered equipment
- Communications
- ATE
- Data acquisition systems
- Medical Instruments
DATA SHEET
RESOURCES & TOOLS
- 16-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: ±0.7 LSB typical, ±1.5 LSB maximum
- SNR
88.5 dB, with on-chip reference
90 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 - Please see data sheet for additional features
- Resolution (Bits): 16bit
- Throughput Rate: 2.5MSPS
- # Chan: 1
- Supply V: Multi(+5, +2.5, +1.8-2.7)
- Pwr Diss: 28mW
- Interface: Ser,SPI
- Ain Range: Uni (Vref),(Vref) p-p
- SNR (dB): 88.5dB
- Pkg Type: CSP
Functional Block Diagram for AD7985
16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN
Other Diagrams for AD7985
16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN
AD7985 Pin Configuration
AD7985 Functional Block Diagram
AD7944: 14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP |
Product Status Production
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 ...More
AD7944: 14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
Product Description
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 a very high sampling rate turbo mode (TURBO high) and a reduced power normal mode (TURBO low) for low power applications where the power is scaled with the throughput. In normal mode (TURBO low), the SPI-compatible serial inter- face also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. 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 operation specified from −40°C to +85°C.
Applications- Battery-powered equipment
- Communications
- ATE
- Data acquisition systems
- Medical instruments
DATA SHEET
RESOURCES & TOOLS
- 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)
- Resolution (Bits): 14bit
- Throughput Rate: 250kSPS
- # Chan: 1
- Supply V: Single(+3.3),Single(+3),Single(+2.5),Single(+5)
- Interface: SPI,Ser
- Ain Range: (2Vref) p-p
- SNR (dB): 85dB
- Pkg Type: SOIC,CSP
Functions Block Diagram for AD7944
14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
Other Diagrams for AD7944
14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
Pin Configuration for AD7944
Functions Block Diagram for AD7944
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