ADS7890 具有 Ref 引脚的 2.7V-5.25V 数字 5V 模拟 14 位 1.25MSP 串行 ADC

	ADS7890
Resolution(Bits)	14
Sample Rate (max)	1.25MSPS
Architecture	SAR
Power Consumption(Typ)(mW)	45
SINAD(dB)	77
SNR(dB)	77.5
SFDR(dB)	97
DNL(Max)(+/-LSB)	0.75
INL(Max)(+/-LSB)	0.75
No Missing Codes(Bits)	14
No. of Supplies	2
Analog Voltage AV/DD(Min)(V)	4.75
Analog Voltage AV/DD(Max)(V)	5.25
Logic Voltage DV/DD(Min)(V)	2.7
Logic Voltage DV/DD(Max)(V)	5.25
Input Configuration Range	Vref
Reference Mode	Int
Rating	Catalog
Pin/Package	48TQFP
# Input Channels	1
Operating Temp Range(Celsius)	-40 to 85

The ADS7890 is a 14-bit 1.25-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit serial SPI or DSP compatible interface. The device has a pseudo-differential input stage.

The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. The device operates at lower power when used at lower conversion rates because of the nap feature. The device is available in a 48-pin TQFP package.

ADS7890 特性

1.25 MHz Sample Rate, 14-Bit Resolution
Zero Latency
Unipolar, Pseudo Differential Input, Range:
- 0 V to 2.5 V
SPITM Compatible Serial Interface
77.5 dB SNR and –95 dB THD at 0.5 MHz I/P
Power Dissipation 45 mW at 1.25 MSPS
Nap Mode (10 mW Power Dissipation)
Power Down (10 uW)
Internal Reference
Internal Reference Buffer
48-Pin TQFP Package
APPLICATIONS
- Optical Networking (DWDM, MEMS Based Switching)
- Spectrum Analyzers
- High Speed Data Acquisition Systems
- High Speed Close-Loop Systems
- Telecommunication

ADS7890 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 \| 引脚
ADS7890IPFBR	ACTIVE	-40 to 85	13.15 \| 1ku	TQFP (PFB) \| 48
ADS7890IPFBRG4	ACTIVE	-40 to 85	13.15 \| 1ku	TQFP (PFB) \| 48
ADS7890IPFBT	ACTIVE	-40 to 85	13.15 \| 1ku	TQFP (PFB) \| 48
ADS7890IPFBTG4	ACTIVE	-40 to 85	13.15 \| 1ku	TQFP (PFB) \| 48