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LM12H458

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Sistema de adquisición de datos de signos Plus de 12 bits y 140 kSPS con autocalibración

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LM12H458

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Detalles del producto

Resolution (bps) 12 Sample rate (max) (ksps) 182 Number of input channels 8 Interface type Parallel Architecture SAR Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 34 Analog supply (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 77.5 Digital supply (min) (V) 3 Digital supply (max) (V) 5.5
Resolution (bps) 12 Sample rate (max) (ksps) 182 Number of input channels 8 Interface type Parallel Architecture SAR Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 34 Analog supply (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 77.5 Digital supply (min) (V) 3 Digital supply (max) (V) 5.5
PLCC (FN) 44 307.3009 mm² 17.53 x 17.53
  • Three operating modes: 12-bit + sign, 8-bit + sign, and "watchdog"
  • Single-ended or differential inputs
  • Built-in Sample-and-Hold and 2.5V bandgap reference
  • Instruction RAM and event sequencer
  • 8-channel multiplexer
  • 32-word conversion FIFO
  • Programmable acquisition times and conversion rates
  • Self-calibration and diagnostic mode
  • 8- or 16-bit wide data bus microprocessor or DSP interface
  • Three operating modes: 12-bit + sign, 8-bit + sign, and "watchdog"
  • Single-ended or differential inputs
  • Built-in Sample-and-Hold and 2.5V bandgap reference
  • Instruction RAM and event sequencer
  • 8-channel multiplexer
  • 32-word conversion FIFO
  • Programmable acquisition times and conversion rates
  • Self-calibration and diagnostic mode
  • 8- or 16-bit wide data bus microprocessor or DSP interface

The LM12458, and LM12H458 are highly integrated Data Acquisition Systems. Operating on just 5V, they combine a fully-differential self-calibrating (correcting linearity and zero errors) 13-bit (12-bit + sign) analog-to-digital converter (ADC) and sample-and-hold (S/H) with extensive analog functions and digital functionality. Up to 32 consecutive conversions, using two's complement format, can be stored in an internal 32-word (16-bit wide) FIFO data buffer. An internal 8-word RAM can store the conversion sequence for up to eight acquisitions through the LM12(H)458's eight-input multiplexer. The obsolete LM12454 has a four-channel multiplexer, a differential multiplexer output, and a differential S/H input. The LM12(H)458 can also operate with 8-bit + sign resolution and in a supervisory "watchdog" mode that compares an input signal against two programmable limits.

Programmable acquisition times and conversion rates are possible through the use of internal clock-driven timers. The reference voltage input can be externally generated for absolute or ratiometric operation or can be derived using the internal 2.5V bandgap reference.

All registers, RAM, and FIFO are directly addressable through the high speed microprocessor interface to either an 8-bit or 16-bit data bus. The LM12(H)458 includes a direct memory access (DMA) interface for high-speed conversion data transfer.

Additional applications information can be found in applications notes AN-906, AN-947 and AN-949.

Key Specifications

(fCLK = 5 MHz; 8 MHz, H)

Resolution12-bit + sign or 8-bit + sign
13-bit conversion time8.8 µs, 5.5 µs (H) (max)
9-bit conversion time4.2 µs, 2.6 µs (H) (max)
13-bit Through-put rate88k samples/s (min),140k samples/s (H) (min)
Comparison time ("watchdog" mode)2.2 µs (max),1.4 µs (H) (max)
ILE±1 LSB (max)
VIN rangeGND to VA+
Power Consumption30 mW, 34 mW (H) (max)
Stand-by mode50 µW (typ)
Single supply3V to 5.5V

The LM12458, and LM12H458 are highly integrated Data Acquisition Systems. Operating on just 5V, they combine a fully-differential self-calibrating (correcting linearity and zero errors) 13-bit (12-bit + sign) analog-to-digital converter (ADC) and sample-and-hold (S/H) with extensive analog functions and digital functionality. Up to 32 consecutive conversions, using two's complement format, can be stored in an internal 32-word (16-bit wide) FIFO data buffer. An internal 8-word RAM can store the conversion sequence for up to eight acquisitions through the LM12(H)458's eight-input multiplexer. The obsolete LM12454 has a four-channel multiplexer, a differential multiplexer output, and a differential S/H input. The LM12(H)458 can also operate with 8-bit + sign resolution and in a supervisory "watchdog" mode that compares an input signal against two programmable limits.

Programmable acquisition times and conversion rates are possible through the use of internal clock-driven timers. The reference voltage input can be externally generated for absolute or ratiometric operation or can be derived using the internal 2.5V bandgap reference.

All registers, RAM, and FIFO are directly addressable through the high speed microprocessor interface to either an 8-bit or 16-bit data bus. The LM12(H)458 includes a direct memory access (DMA) interface for high-speed conversion data transfer.

Additional applications information can be found in applications notes AN-906, AN-947 and AN-949.

Key Specifications

(fCLK = 5 MHz; 8 MHz, H)

Resolution12-bit + sign or 8-bit + sign
13-bit conversion time8.8 µs, 5.5 µs (H) (max)
9-bit conversion time4.2 µs, 2.6 µs (H) (max)
13-bit Through-put rate88k samples/s (min),140k samples/s (H) (min)
Comparison time ("watchdog" mode)2.2 µs (max),1.4 µs (H) (max)
ILE±1 LSB (max)
VIN rangeGND to VA+
Power Consumption30 mW, 34 mW (H) (max)
Stand-by mode50 µW (typ)
Single supply3V to 5.5V
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Documentación técnica

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* Data sheet LM12454/LM12458/LM12H458 12-Bit + Sign Data Acq System w/Self-Calibration datasheet (Rev. A) 16 feb 2006

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje