AD7705: 2 fully differential input channel ADCs
AD7706: 3 pseudo differential input channel ADCs
16 bits no missing codes
0.003% nonlinearity
Programmable gain front end: gains from 1 to 128
3-wire serial interface
SPIu00ae-, QSPIu2122-, MICROWIREu2122-, and DSP-compatible
Schmitt-trigger input on SCLK
Ability to buffer the analog input
2.7 V to 3.3 V or 4.75 V to 5.25 V operation
Power dissipation 1 mW maximum @ 3 V
Standby current 8 u03bcA maximum
16-lead PDIP, 16-lead SOIC, and 16-lead TSSOP packages
The AD7705/AD7706 are complete analog front ends for low frequency measurement applications. These 2-/3-channel devices can accept low level input signals directly from a transducer and produce serial digital output. The devices employ a Σ-Δ conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary, programmable-gain front end based around an analog modulator. The modulator output is processed by an on- chip digital filter. The first notch of this digital filter can be pro- grammed via an on-chip control register, allowing adjustment of the filter cutoff and output update rate. The AD7705/AD7706 devices operate from a single 2.7 V to 3.3 V or 4.75 V to 5.25 V supply. The AD7705 features two fully differential analog input channels; the AD7706 features three pseudo differential input channels. Both devices feature a differential reference input. Input signal ranges of 0 mV to 20 mV through 0 V to 2.5 V can be incorporated on both devices when operating with a VDD of 5 V and a reference of 2.5 V. They can also handle bipolar input signal ranges of ±20 mV through ±2.5 V, which are referenced to the AIN(−) inputs on the AD7705 and to the COMMON input on the AD7706.
Specifications
Resolution (Bits):
16bit
Sampling Rate:
500SPS
Input Channel Type:
Pseudo Differential
Data Interface:
Microwire QSPI SPI
Supply Voltage Type:
Single
Supply Voltage Min:
2.7V
Supply Voltage Max:
5.25V
ADC / DAC Case Style:
WSOIC
No. of Pins:
16Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
Triple 16-Bit Sigma-Delta ADCs
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (07-Jul-2017)
Supply Current:
1.3mA
Supply Voltage Range:
2.7V to 3.3V 4.75V to 5.25V
Alternate Descriptions
RS Components
ADC Single Delta-Sigma 0.5KSPS 16-Bit
Newark Electronics
Analogue to Digital Converter, Triple Sigma Delta, 16 bit, 500 SPS, Single, 2.7 V, 5.25 V, WSOIC RoHS Compliant: Yes
Richardson RFPD
CONVERTER - ADC
RS Components UK
ADC Single Delta-Sigma 0.5KSPS 16-Bit
RS Components DE
16-Bit-Bit ADC AD7706BRZ Differentiell SPI, SOIC W 16-Pin 3 Digital Interface Typ : Seriell (SPI) Montage-Typ : SMD Abtastrate : 0.5ksps Architektur : Delta Sigma Versorgungsspannung einzeln typ. : 3 V, 5 V Eingangssignal-Typ : Pseudo-Differential Integrale Nichtlinearität : ±0.003%FSR Abmessungen : 10.5 x 7.6 x 2.35mm, Analog Devices
