Part A
AD7710ANZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3222 PCS
- Package
- DIP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7710ANZ and AD7711AN are both 24-bit sigma-delta signal-conditioning ADCs from Analog Devices in a 24-lead PDIP package, sharing a closely related core architecture and pin-compatible footprint. However, they differ in on-chip excitation current sources, reference input configuration, and available gain settings, so the AD7711AN can serve as a functional substitute for the AD7710ANZ only after the system's excitation, reference, and gain requirements are validated against the target design.
Resolution and ADC Architecture
High match
Package Type
High match
On-Chip Excitation Current Sources
Validation required
Reference Input Configuration
Validation required
Parts at a glance
Part B
AD7711AN
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5897 PCS
- Package
- DIP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7710ANZ | AD7711AN | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution is equivalent for high-precision measurement applications. |
| Number of input channels | 2 (differential) | 2 (differential) | Channel count determines how many signal sources can be measured; both offer two differential inputs. |
| On-chip PGA gain range | 1 to 128 | 1 to 128 | Programmable gain allows direct interfacing with low-level sensors without external amplification. |
| Integrated current sources | Yes (2) | Yes (2) | On-chip excitation current sources simplify RTD and thermistor sensor designs. |
| Interface type | Serial (SPI-compatible, bidirectional) | Serial (SPI-compatible, bidirectional) | Serial interface compatibility affects microcontroller connection and firmware portability. |
| Supply voltage (analog) | 5 V (single) or ±5 V (dual) | 5 V (single) or ±5 V (dual) | Supply requirements determine power rail design and signal range compatibility. |
| Package type | 24-lead PDIP | 24-lead PDIP | Package footprint affects PCB layout and whether parts are drop-in replacements. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | Temperature range determines suitability for industrial and harsh-environment applications. |
| On-chip calibration | Yes (self and system calibration) | Yes (self and system calibration) | Built-in calibration reduces offset and gain errors without external circuitry. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7710ANZ | AD7711AN |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 1k | 1k |
| Number of Inputs | 2 | 2 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 5V ~ 10V | 5V ~ 10V |
| Voltage - Supply, Digital | 5V | 5V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the AD7710ANZ and the AD7711AN?
Both are 24-bit sigma-delta analog-to-digital converters from Analog Devices. The AD7710ANZ is a two-channel (differential) device with an on-chip programmable gain amplifier (PGA) and a bidirectional serial interface, while the AD7711AN is a two-channel device that integrates a programmable gain amplifier and also includes an on-chip current source for RTD (resistance temperature detector) excitation, making it better suited for temperature-sensing applications.
Are the AD7710ANZ and AD7711AN pin-compatible?
Both devices are offered in a 24-lead PDIP (0.3-inch wide) package, but they are not functionally interchangeable without design review. The AD7711AN includes an on-chip excitation current source and additional control/register functions that the AD7710ANZ does not provide, so pin functions and register maps differ. Always verify pin assignments against the respective Analog Devices datasheets before substitution.
Do both parts support the same resolution and output data rate?
Yes. Both the AD7710ANZ and AD7711AN are 24-bit sigma-delta ADCs with programmable output update rates. Per Analog Devices datasheets, both offer selectable output data rates in the range of approximately 10 Hz to 1 kHz (with corresponding settling behavior), and both provide 24-bit no-missing-code performance at lower update rates.
Which device is better suited for RTD temperature measurement?
The AD7711AN is generally preferred for RTD applications because it integrates matched on-chip current sources for sensor excitation, eliminating the need for external excitation circuitry. The AD7710ANZ lacks these on-chip current sources, so an RTD design using the AD7710ANZ would require external excitation components.
What is the supply voltage and power consumption of these devices?
Both the AD7710ANZ and AD7711AN operate from a single +5 V analog supply (with a separate +5 V digital supply) and support bipolar input ranges. Typical power dissipation for both devices is on the order of tens of milliwatts (approximately 25 mW typical per Analog Devices datasheets), depending on configuration and update rate.
Can the AD7711AN be used as a drop-in replacement for the AD7710ANZ in an existing design?
Not as a direct drop-in replacement. Although both share the same 24-lead PDIP footprint and 24-bit sigma-delta architecture, the AD7711AN adds on-chip current sources and has different register/control functionality. A drop-in substitution requires verifying pin functions, register maps, and external circuit changes against both Analog Devices datasheets.
Do both parts offer a bidirectional serial interface for microcontroller connection?
Yes. Both the AD7710ANZ and AD7711AN provide a bidirectional serial interface compatible with SPI-style communication, allowing direct connection to microcontrollers and DSPs. The interface supports read/write access to on-chip control and data registers, though the specific register sets differ between the two devices.