首頁 數據轉換器 類比轉數位轉換器 (ADC) 精確 ADC
首頁
數據轉換器
類比轉數位轉換器 (ADC)
精確 ADC

LM12458

最後一次購買

具自校準功能的 88 kSPS 12 位元 + 資料採集系統

立即訂購
產品規格表

LM12458

最後一次購買
產品規格表 立即訂購

產品詳細資料

Resolution (bps) 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 (bps) 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
filter 尋找其它 精確 ADC
下載

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 1
類型 標題 日期
* Data sheet LM12454/LM12458/LM12H458 12-Bit + Sign Data Acq System w/Self-Calibration datasheet (Rev. A) 2006年 2月 16日

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點