AD7712ANZ

Semiconductors - ICs

> Data & Signal Conversion

> Analog-to-Digital Converters - ADC

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Series Information for AD7712ANZ - Analog Devices

Features

  • feature
    Charge Balancing ADC 24 Bits No Missing Codes u2d1e0.0015% Nonlinearity High Level and Low Level Analog Input Channels Programmable Gain for Both Inputs Gains from 1 to 128 Differential Input for Low Level Channel Low-Pass Filter with Programmable Filter Cutoffs Ability to Read/Write Calibration Coefficients Bidirectional Microcontroller Serial Interface Internal/External Reference Option Single- or Dual-Supply Operation Low Power (25 mW typ) with Power-Down Mode (100 u242eW typ)

Description

IC 24BIT ADC S-DELTA SIGNAL COND
The AD7712 is a complete analog front end for low frequency measurement applications. The device has two analog input channels and accepts either low level signals directly from a trans- ducer or high level (±4 ⫻ VREF) signals, and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The low level input signal is applied to a proprietary programmable gain front end based around an analog modulator. The high level analog input is attenuated before being applied to the same modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register, allowing adjustment of the filter cutoff and settling time. Normally, one of the channels will be used as the main channel with the second channel used as an auxiliary input to periodi- cally measure a second voltage. The part can be operated from a single supply (by tying the VSS pin to AGND), provided that the input signals on the low level analog input are more positive than –30 mV. By taking the VSS pin negative, the part can con- vert signals down to –VREF on this low level input. This low level input, as well as the reference input, features differential input capability. The AD7712 is ideal for use in smart, microcontroller based systems. Input channel selection, gain settings, and signal polar- ity can be configured in software using the bidirectional serial port. The AD7712 also contains self-calibration, system calibra- tion, and background calibration options, and allows the user to read and to write the on-chip calibration registers. CMOS construction ensures low power dissipation, and a hard- ware programmable power-down mode reduces the standby power consumption to only 100 µW typical. The part is available in a 24-lead, 0.3 inch wide, plastic and hermetic dual-in-line pack- age (DIP), as well as a 24-lead small outline (SOIC) package.

Specifications

Resolution (Bits):
24bit
Sampling Rate:
19.5kSPS
Input Channel Type:
Differential
Data Interface:
Serial
Supply Voltage Type:
Single
Supply Voltage Min:
4.75V
Supply Voltage Max:
10.5V
ADC / DAC Case Style:
DIP
No. of Pins:
24Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
Dual 24-Bit Sigma-Delta ADCs
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
-
SVHC:
No SVHC (07-Jul-2017)
Base Number:
7712
IC Case Style:
DIP
No. of Channels:
2Channels
Operating Temperature Range:
-40°C to +85°C
Supply Current:
4.5mA
Supply Voltage Range:
4.75V to 5.25V 5V to 10V 10.5V
Supply Voltage Range - Analogue:
5V to 10V
Supply Voltage Range - Digital:
4.75V to 5.25V
Termination Type:
Through Hole

Alternate Descriptions

Richardson RFPD

CONVERTER - ADC