AD7770ACPZ - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD7770ACPZ
Manufacturer

ADI
ChipWorker Part#

CW1890929
Category

Analog to Digital, ADC IC
Package

LFCSP-64
Description

ANALOG DEVICES AD7770ACPZ Analog to Digital Converter, 8CH, Sigma-Delta, 24Bit, 32KSPS, Single, 2.2V, 3.6V, LFCSP
Documentation

Datasheet

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AD7770ACPZ Specifications

Attribute	Attribute Value

Part Number	AD7770ACPZ
Manufacturer	ADI
ChipWorker Part#	CW1890929
Category	Analog to Digital, ADC IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	64 Pin
Case/Package	LFCSP-64
Supply Voltage (DC)	2.20V (min)
Number of Positions	64 Position
Number of Bits	24 Bit
Power Dissipation	117 mW
Sample Rate	32 ksps
Number of ADCs	8 ADC
Number of Inputs	8 Input
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	136 mW
Number of Input Channels	8 Channel
Supply Voltage (Max)	3.6 V
Supply Voltage (Min)	2.2 V
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Operating Temperature	-40℃ ~ 125℃
Product Lifecycle Status	Active
Packaging	Each
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance Edition	2016/06/20
ECCN Code	EAR99

Product Description

Product Details
The AD7770 is an 8-channel, simultaneous sampling ADC. Eight full sigma-delta (Σ-Δ) ADCs are on chip. The AD7770 provides a low input current to allow direct sensor connection. Each input channel has a programmable gain stage allowing gains of 1, 2, 4, and 8 to map lower amplitude sensor outputs into the full-scale ADC input range, maximizing the dynamic range of the signal chain. The AD7770 accepts a VREF voltage from 1 V up to 3.6 V.
The analog inputs accept unipolar (0 V to VREF) or true bipolar (±VREF/2) analog input signals with 3.3 V or ±1.65 V analog supply voltages, respectively for PGAGAIN = 1. The analog inputs can be configured to accept true differential, pseudo differential, or single-ended signals to match different sensor output configurations.
Each channel contains a PGA, an ADC modulator and a sinc3, low latency digital filter. An SRC is provided to allow fine resolution control over the AD7770 ODR. This control can be used in applications where the ODR resolution is required to maintain coherency with 0.01 Hz changes in the line frequency. The SRC is programmable through the serial port interface (SPI). The AD7770 implements two different interfaces: a data output interface and SPI control interface. The ADC data output interface is dedicated to transmitting the ADC conversion results from the AD7770 to the processor. The SPI writes to and reads from the AD7770 configuration registers and for the control and reading of data from the SAR ADC. The SPI can also be configured to output the Σ-Δ conversion data.
The AD7770 includes a 12-bit SAR ADC. This ADC can be used for AD7770 diagnostics without having to decommission one of the Σ-Δ ADC channels dedicated to system measurement functions. With the use of an external multiplexer, which can be controlled through the three general-purpose input/output pins (GPIOs), and signal conditioning, the SAR ADC can validate the Σ-Δ ADC measurements in applications where functional safety is required. In addition, the AD7770 SAR ADC includes an internal multiplexer to sense internal nodes.
The AD7770 contains a 2.5 V reference and reference buffer. The reference has a typical temperature coefficient of 10 ppm/°C.
The AD7770 offers two modes of operation: high resolution mode and low power mode. High resolution mode provides a higher dynamic range while consuming 10.75 mW per channel; low power mode consumes just 3.37 mW per channel at a reduced dynamic range specification.
The specified operating temperature range is −40°C to +105°C, although the device is operational up to +125°C.
Applications
Protection relays
General-purpose data acquisition
Industrial process control
### Features and Benefits
8-channel, 24-bit simultaneous sampling analog-to-digital converter (ADC)
Single-ended or true differential inputs
Programmable gain amplifier (PGA) per channel (gains of 1, 2, 4, and 8)
Low dc input current
±4 nA (differential) and ±8 nA (single-ended)
Up to 32 kSPS output data rate (ODR) per channel
Programmable ODRs and bandwidth
Sample rate converter (SRC) for coherent sampling
Sampling rate resolution up to 15.2 × 10−6 SPS
Low latency sinc3 filter path
Adjustable phase synchronization
Internal 2.5 V reference
Two power modes optimizing power dissipation and performance: high resolution mode and low power mode
Low resolution successive approximation register (SAR) ADC for system and chip diagnostics
Power supply
Bipolar (±1.65 V) or unipolar (3.3 V) supplies
Digital input/output (I/O) supply: 1.8 V to 3.6 V
Performance temperature range: −40°C to +105°C
Functional temperature range: −40°C to +125°C
Performance
Combined ac and dc performance
103 dB dynamic range at 32 kSPS in high resolution mode
−109 dB total harmonic distortion (THD)
±9 ppm of FSR integral nonlinearity (INL)
±15 µV offset error
±0.1% FS gain error
±10 ppm/°C typical temperature coefficient

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