ADS7955 10 位、1MSPS、16 通道、单端、微功耗、串行接口、SAR ADC

ADS7955 说明

The ADS79XX is a 12/10/8-bit multichannel analog-to-digital converter family. The following table shows all twelve devices from this product family.

The devices include a capacitor based SAR A/D converter with inherent sample and hold.

The devices accept a wide analog supply range from 2.7V to 5.25V. Very low power consumption makes these devices suitable for battery-powered and isolated power supply applications.

A wide 1.7V to 5.25V I/O supply range facilitates a glue-less interface with the most commonly used CMOS digital hosts.

The serial interface is controlled by CS and SCLK for easy connection with microprocessors and DSP.

The input signal is sampled with the falling edge of CS.



	ADS7950	ADS7951	ADS7952	ADS7953	ADS7954	ADS7955	ADS7956	ADS7957	ADS7958	ADS7959	ADS7960	ADS7961
Resolution(Bits)	12	12	12	12	10	10	10	10	8	8	8	8
Sample Rate (max)	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS	1MSPS
Architecture	SAR	SAR	SAR	SAR	SAR	SAR	SAR	SAR	SAR	SAR	SAR	SAR
Power Consumption(Typ)(mW)	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5
SINAD(dB)	69	69	69	69	60	60	60	60	49	49	49	49
SNR(dB)	70	70	70	70	60	60	60	60	49	49	49	49
SNR(Typ)(dB)	71.7	71.7	71.7	71.7	61.7	61.7	61.7	61.7	49.8	49.8	49	49
SFDR(dB)	84	84	84	84	82	82	82	82	78	78	78	78
DNL(Max)(+/-LSB)	1	1	1	1	0.5	0.5	0.5	0.5	0.3	0.3	0.3	0.3
INL(Max)(+/-LSB)	1	1	1	1	0.5	0.5	0.5	0.5	0.3	0.3	0.3	0.3
No Missing Codes(Bits)	12	12	12	12	10	10	10	10	8	8	8	8
ENOB(Bits)	11.29	11.29	11.29	11.29	9.66	9.66	9.66	9.66	7.85	7.85	7.85	7.85
No. of Supplies	2	2	2	2	2	2	2	2	2	2	2	2
Analog Voltage AV/DD(Min)(V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7
Analog Voltage AV/DD(Max)(V)	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25
Logic Voltage DV/DD(Min)(V)	1.7	1.7	1.7	1.7	1.7	1.7	1.7	1.7	1.7	1.7	1.7	1.7
Logic Voltage DV/DD(Max)(V)	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25	5.25
Input Configuration Range	Vref, 2Vref	Vref, 2Vref	Vref, 2Vref	Vref, 2Vref	Vref, 2Vref	Vref, 2VREF	Vref, 2VREF	Vref, 2Vref	Vref. 2Vref	Vref, 2Vref	Vref, 2Vref	Vref, 2Vref
Reference Mode	Ext	Ext	Ext	Ext	Ext	Ext	Ext	Ext	Ext	Ext	Ext	Ext
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Pin/Package	24VQFN, 30TSSOP	24VQFN, 30TSSOP	32QFN, 38TSSOP	32QFN, 38TSSOP	24VQFN, 30TSSOP	24VQFN, 30TSSOP	32QFN, 38TSSOP	32QFN, 38TSSOP	24VQFN, 30TSSOP	24VQFN, 30TSSOP	32QFN, 38TSSOP	32QFN, 38TSSOP
# Input Channels	4	8	12	16	4	8	12	16	4	8	12	16
Operating Temperature Range(°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125

ADS7955 特性

• 1-MHz Sample Rate Serial Devices
• Product Family of 12/10/8-Bit Resolution
• Zero Latency
• 20-MHz Serial Interface
• Analog Supply Range: 2.7 to 5.25V
• I/O Supply Range: 1.7 to 5.25V
• Two SW Selectable Unipolar, Input Ranges: 0 to 2.5V and 0 to 5V
• Auto and Manual Modes for Channel Selection
• 12,8,4-Channel Devices can Share 16 Channel Device Footprint
• Two Programmable Alarm Levels per Channel
• Four Individually Configurable GPIOs for TSSOP package devices. One GPIO for QFN devices
• Typical Power Dissipation: 14.5 mW (+VA = 5V, +VBD = 3V) at 1 MSPS
• Power-Down Current (1 uA)
• Input Bandwidth (47 MHz at 3dB)
• 38-,30-Pin TSSOP and 32-,24-Pin QFN Packages
• APPLICATIONS
  • PLC / IPC
  • Battery Powered Systems
  • Medical Instrumentation
  • Digital Power Supplies

ADS7955 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
ADS7955SDBT	ACTIVE	-40 to 125	3.00 | 1ku	TSSOP (DBT) | 38	50 | TUBE	ADS7955
ADS7955SDBTG4	ACTIVE	-40 to 125	3.00 | 1ku	TSSOP (DBT) | 38	50 | TUBE	ADS7955
ADS7955SDBTR	ACTIVE	-40 to 125	2.70 | 1ku	TSSOP (DBT) | 38	2000 | LARGE T&R	ADS7955
ADS7955SDBTRG4	ACTIVE	-40 to 125	2.70 | 1ku	TSSOP (DBT) | 38	2000 | LARGE T&R	ADS7955
ADS7955SRHBR	ACTIVE	-40 to 125	2.45 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	ADS 7955
ADS7955SRHBT	ACTIVE	-40 to 125	2.70 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	ADS 7955

ADS7955 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
ADS7955SDBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7955SDBT
ADS7955SDBTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7955SDBTG4	ADS7955SDBTG4
ADS7955SDBTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		ADS7955SDBTR
ADS7955SDBTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	ADS7955SDBTRG4	ADS7955SDBTRG4
ADS7955SRHBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR		ADS7955SRHBR
ADS7955SRHBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR		ADS7955SRHBT

ADS7955 应用技术支持与电子电路设计开发资源下载

1. ADS7955 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)

ADS7955 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