Part A
AD7710ANZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3222 PCS
- Package
- DIP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Not a drop-in replacement
The AD7710ANZ and AD7714AN-3 are both 24-bit sigma-delta ADCs from Analog Devices, but they differ fundamentally in resolution architecture, input channel configuration, and supply voltage requirements. The AD7714AN-3 offers three differential input channels and operates from a 3 V supply, while the AD7710ANZ provides two differential inputs with an on-chip programmable gain amplifier and requires a 5 V supply. These differences in channel count, supply voltage, and gain stage architecture mean the two devices are not functionally interchangeable without circuit redesign and validation.
Different channel count
Different supply voltage
Different gain architecture
Different package footprint
Parts at a glance
Part B
AD7714AN-3
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7387 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 | AD7714AN-3 | 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) | 5 (3 differential / 5 pseudo-differential) | The AD7714 offers more input channels, allowing more signals to be multiplexed into a single converter. |
| PGA gain range | 1 to 128 | 1 to 128 | Identical programmable gain ranges support similar low-level signal amplification for both parts. |
| Output data rate (max) | 1.028 kSPS | 1 kSPS | Similar maximum throughput; both suit low-frequency precision measurement rather than high-speed sampling. |
| Supply voltage | 5 V (single) or ±5 V (dual) | 3 V (single) or 5 V (single) | The AD7714AN-3 supports lower 3 V operation, which matters for low-power or 3 V logic systems. |
| Interface | Serial (SPI-compatible, bidirectional) | Serial (SPI/QSPI/MICROWIRE/DSP-compatible) | Both use serial interfaces, but the AD7714 offers broader microcontroller/DSP compatibility. |
| Package | 24-lead PDIP | 24-lead PDIP | Same package footprint simplifies board-level substitution and layout reuse. |
| On-chip calibration | Yes (self- and system-calibration) | Yes (self- and system-calibration) | Both provide on-chip calibration, reducing external circuitry and improving accuracy over temperature. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ranges make both suitable for the same environmental conditions. |
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 | AD7714AN-3 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 1k | 1k |
| Number of Inputs | 2 | 3, 5 |
| Input Type | Differential | Differential, Pseudo-Differential |
| Data Interface | SPI | SPI, DSP |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 5V ~ 10V | 3V ~ 3.6V |
| Voltage - Supply, Digital | 5V | 3V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the AD7710ANZ and AD7714AN-3?
The AD7710ANZ is a 24-bit sigma-delta ADC with a single differential input (two channels) and an on-chip programmable gain amplifier (PGA) with gains from 1 to 128. The AD7714AN-3 is a 24-bit sigma-delta ADC with five input channels (three differential or five pseudo-differential) and a PGA with gains from 1 to 128. The AD7714AN-3 also includes a programmable filter with selectable output update rates, while the AD7710ANZ offers a similar programmable filter but with a different register architecture. Both are manufactured by Analog Devices in 24-lead PDIP (N) packages.
Are the AD7710ANZ and AD7714AN-3 pin-compatible?
No. Although both devices are housed in 24-lead PDIP packages, their pinouts differ. The AD7710ANZ and AD7714AN-3 assign different functions to several pins, including input channel connections, reference inputs, and digital control lines. A direct drop-in replacement without PCB layout changes is not possible; the pin functions must be verified against the respective Analog Devices datasheets before substitution.
What are the supply voltage requirements for each device?
The AD7710ANZ operates from a single +5 V supply (AVDD and DVDD) or a dual ±5 V supply, with a specified analog supply range of 4.75 V to 5.25 V. The AD7714AN-3 is specified for a +3 V nominal supply (2.7 V to 3.6 V) for both analog and digital supplies. Because of this difference, the AD7714AN-3 is suited to 3 V systems, while the AD7710ANZ targets 5 V systems.
How do the input channel configurations compare?
The AD7710ANZ provides two input channels that can be configured as two differential inputs or one differential and one pseudo-differential input, selectable via the A0 pin. The AD7714AN-3 provides five input channels configurable as three differential inputs or five pseudo-differential inputs, selected through the channel register. Designs requiring more input channels should consider the AD7714AN-3, while the AD7710ANZ is adequate for two-channel applications.
Do both parts support the same programmable gain settings?
Yes. Both the AD7710ANZ and AD7714AN-3 include an on-chip PGA with selectable gains of 1, 2, 4, 8, 16, 32, 64, and 128. The gain is programmed through the respective control registers. This allows both devices to interface directly with low-level transducer signals without external amplification.
What are the output data rate and resolution specifications?
Both devices are 24-bit sigma-delta ADCs with no missing codes. The AD7710ANZ offers programmable output update rates from approximately 9.8 Hz to 1.028 kHz, depending on the filter settings. The AD7714AN-3 provides programmable output update rates from 5 Hz to 1 kHz. The actual noise-free resolution depends on the selected gain and output update rate, as specified in the Analog Devices datasheets.
Can the AD7714AN-3 replace the AD7710ANZ in an existing 5 V design?
No, not directly. The AD7714AN-3 is specified for a 3 V supply (2.7 V to 3.6 V) and is not rated for 5 V operation. Additionally, the pinouts and channel configurations differ. A 5 V design using the AD7710ANZ would require a different part, such as a 5 V variant of the AD7714 family, along with a PCB redesign to accommodate the different pinout and supply requirements.
What interface do these ADCs use for communication with a microcontroller?
Both the AD7710ANZ and AD7714AN-3 use a serial interface for communication. The AD7710ANZ provides a bidirectional serial port that supports both self-clocking and external clocking modes. The AD7714AN-3 uses a standard SPI-compatible 3-wire or 4-wire serial interface. In both cases, the interface allows read/write access to the on-chip control and data registers for configuration and conversion result retrieval.