홈 데이터 컨버터 아날로그-디지털 컨버터(ADC) 정밀 ADC
홈
데이터 컨버터
아날로그-디지털 컨버터(ADC)
정밀 ADC

LM12458

마지막 구매

88kSPS, 12비트 플러스 사인 데이터 수집 시스템(자체 보정 지원)

지금 주문
데이터시트

LM12458

마지막 구매
데이터시트 지금 주문

제품 상세 정보

Resolution (Bits) 12 Sample rate (max) (ksps) 114 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) 30 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 (Bits) 12 Sample rate (max) (ksps) 114 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) 30 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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기술 문서

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모두 보기5
유형 직함 날짜
* Data sheet LM12454/LM12458/LM12H458 12-Bit + Sign Data Acq System w/Self-Calibration datasheet (Rev. A) 2006/02/16
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 2015/05/21
Application note Interface LM12454/8 Data Acq Sys Chips to Microprocessors & Microcontrollers 2004/05/14
Application note Interfacing the LM12458 Data Acq Sys to the MC68HC11AX Microcontroller 2004/05/14
Application note Interfacing the LM12454/8 Data Acq Sys Chip to 80C51 Family of Microcontrollers 2004/05/14

설계 및 개발

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PSPICE-FOR-TI — TI 설계 및 시뮬레이션 툴용 PSpice®

TI용 PSpice®는 아날로그 회로의 기능을 평가하는 데 사용되는 설계 및 시뮬레이션 환경입니다. 완전한 기능을 갖춘 이 설계 및 시뮬레이션 제품군은 Cadence®의 아날로그 분석 엔진을 사용합니다. 무료로 제공되는 TI용 PSpice에는 아날로그 및 전력 포트폴리오뿐 아니라 아날로그 행동 모델에 이르기까지 업계에서 가장 방대한 모델 라이브러리 중 하나가 포함되어 있습니다.

TI 설계 및 시뮬레이션 환경용 PSpice는 기본 제공 라이브러리를 이용해 복잡한 혼합 신호 설계를 시뮬레이션할 수 있습니다. 레이아웃 및 제작에 (...)
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PLCC (FN) 44 옵션 보기
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주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

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