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ADS1234 24 位超低噪声模数转换器

ADS1242 相关产品

• ADS1230 - 20bit single channel version
• ADS1232 - 2 channel version of ADS1234
• ADS1241 - 器件与被比较器件具有相似功能，但并不功能等效。

The ADS1232 and ADS1234 are precision 24-bit analog-to-digital converters (ADCs). With an onboard, low-noise programmable gain amplifier (PGA), precision delta-sigma ADC and internal oscillator, the ADS1232/4 provide a complete front-end solution for bridge sensor applications including weigh scales, strain gauges and pressure sensors.

The input multiplexer accepts either two (ADS1232) or four (ADS1234) differential inputs. The ADS1232 also includes an onboard temperature sensor to monitor ambient temperature. The onboard, low-noise PGA has a selectable gain of 1, 2, 64, or 128 supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV. The delta-sigma ADC has 23.5-bit effective resolution and is comprised of a 3rd-order modulator and 4th-order digital filter.

	ADS1130	ADS1131	ADS1230	ADS1231	ADS1232	ADS1234
Resolution(Bits)	18		20		24	24
Sample Rate (max)	80SPS		80SPS	80SPS	80SPS	80SPS
Architecture	Delta-Sigma	Delta-Sigma	Delta-Sigma	Delta-Sigma	Delta-Sigma	Delta-Sigma
Power Consumption(Typ)(mW)	2.9	2.9	2.9	2.9	4.3	4.3
DNL(Max)(+/-LSB)	1	1	1	1	1	1
INL(Max)(+/-LSB)	0.0006%		0.0006%	0.0006%	0.0002%	0.0002%
No Missing Codes(Bits)	18	18	20	24	24	24
ENOB(Bits)	17.5	17.5	19.5	23.5	23.5	23.5
No. of Supplies	2	2	2	2	2	2
Analog Voltage AV/DD(Min)(V)	2.7	2.7	2.7	2.7	2.7	2.7
Analog Voltage AV/DD(Max)(V)	5.3	5.3	2.3	5.3	5.3	5.3
Logic Voltage DV/DD(Min)(V)	2.7	2.7	2.7		2.7	2.7
Logic Voltage DV/DD(Max)(V)	5.3	5.3	5.3		5.3	5.3
Input Configuration Range	0.5Vref/PGA (1,2,64)	0.5Vref/PGA	0.5Vref/PGA (1,2,64,128)	0.5Vref/PGA	0.5Vref/PGA (1,2,64,128)	0.5Vref/PGA (1,2,64,128)
Reference Mode	Ext	Ext	Ext	EXT	Ext	Ext
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Pin/Package	16TSSOP	16TSSOP	16TSSOP	16TSSOP	24TSSOP	28TSSOP
# Input Channels	1	1	1	1	2	4
Operating Temp Range(Celsius)	-40 to 85		-40 to 85		-40 to 105	-40 to 105

ADS1234 特性

• Complete Front-End for Bridge Sensors
• Up to 23.5 Effective Bits
• Onboard, Low-Noise PGA
• RMS Noise:
  17nV at 10SPS (PGA = 128)
  44nV at 80SPS (PGA = 128)
• 19.2-Bit Noise-Free Resolution at Gain = 64
• Over 100dB Simultaneous 50Hz and 60Hz Rejection
• Flexible Clocking: Low-Drift Onboard Oscillator (±3%) Optional External Crystal
• Selectable Gains of 1, 2, 64, and 128
• Easy Ratiometric Measurements—External Voltage Reference up to 5V
• Selectable 10SPS or 80SPS Data Rates
• Two-Channel Differential Input with Built-In Temperature Sensor (ADS1232)
• Four-Channel Differential Input (ADS1234)
• Simple Serial Digital Interface
• Supply Range: 2.7V to 5.3V
• -40°C to +105°C Temperature Range
• APPLICATIONS
  • Weigh Scales
  • Strain Gauges
  • Pressure Sensors
  • Industrial Process Control

ADS1234 芯片订购指南

器件	状态	温度(oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
ADS1234IPW	ACTIVE	-40 to 105	4.50 | 1ku	TSSOP(PW) | 28	50 | TUBE	ADS1234
ADS1234IPWG4	ACTIVE	-40 to 105	4.50 | 1ku	TSSOP(PW) | 28	50 | TUBE	ADS1234
ADS1234IPWR	ACTIVE	-40 to 105	4.05 | 1ku	TSSOP(PW) | 28	2000 | LARGE T&R	ADS1234
ADS1234IPWRG4	ACTIVE	-40 to 105	4.05 | 1ku	TSSOP(PW) | 28	2000 | LARGE T&R	ADS1234

ADS1234 工具与软件

名称	型号	公司	工具/软件类型
用于模数转换器的抗混淆计算工具	ANTIALIASINGCALC	Texas Instruments	计算实用程序
运算放大器至 ADC 电路拓扑计算器	ADC-INPUT-CALC	Texas Instruments	计算实用程序

ADS1234 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
ADS1234IPW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS1234IPW	ADS1234IPW
ADS1234IPWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS1234IPWG4	ADS1234IPWG4
ADS1234IPWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS1234IPWR	ADS1234IPWR
ADS1234IPWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS1234IPWRG4	ADS1234IPWRG4

ADS1234 应用技术支持与电子电路设计开发资源下载

1. ADS1234 数据资料 dataSheet 下载.PDF
2. TI 德州仪器仪ADC 模数转换器产品选型与价格 . xls
3. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
4. 所选封装材料的热学和电学性质 (PDF 645 KB)
5. 高速数据转换 (PDF 1967 KB)
6. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
7. A Spreadsheet for Calculating the Frequency Response of the ADS1250-54 (PDF 461 KB)
8. A Spreadsheet for Calculating the Frequency Response of the ADS1250-54
9. Understanding the ADS1251, ADS1253, and ADS1254 Input Circuitry (PDF 39 KB)
10. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
11. Principles of Data Acquisition and Conversion (PDF 50 KB)
12. Interleaving Analog-to-Digital Converters (PDF 64 KB)
13. What Designers Should Know About Data Converter Drift (PDF 95 KB)
14. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
15. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)