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 AD7715AN-3 are both 24-bit sigma-delta ADCs from Analog Devices, but they differ fundamentally in resolution architecture, input channel configuration, programmable gain range, and output data rate capability. The AD7715AN-3 offers a single differential input with limited gain settings and a narrower update rate range, while the AD7710ANZ provides dual differential inputs with a wider gain range and higher output data rate. These architectural differences prevent direct functional substitution without circuit redesign and firmware adaptation.
Different channel count
Different gain range
Different output data rate
Different interface timing
Parts at a glance
Part B
AD7715AN-3
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 8275 PCS
- Package
- DIP-16
- 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 | AD7715AN-3 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 16 | Higher resolution allows detection of smaller signal changes; the 24-bit AD7710 offers finer measurement granularity than the 16-bit AD7715. |
| Number of input channels | 2 (differential) | 1 (differential) | Channel count determines how many signal sources can be connected; the AD7710 supports two differential inputs while the AD7715 supports only one. |
| PGA gain settings | 1 to 128 | 1, 2, 32, 128 | Programmable gain amplifies low-level sensor signals; the AD7710 offers a continuous gain range while the AD7715 provides discrete gain steps. |
| Supply voltage | 5 V (single) or ±5 V (dual) | 3 V (single) | Supply voltage must match the system power rail; the AD7715AN-3 is optimized for 3 V systems while the AD7710 requires 5 V. |
| Output data rate | Up to 1.028 kSPS | Up to 500 SPS | Data rate affects how fast measurements can be updated; the AD7710 supports higher throughput than the AD7715. |
| Interface type | Serial (bidirectional, SPI-compatible) | Serial (SPI/QSPI/MICROWIRE/DSP compatible) | Interface compatibility determines ease of connection to a host microcontroller; both are serial but differ in protocol flexibility. |
| Package | 24-lead PDIP | 16-lead PDIP | Package footprint and pin count affect PCB layout and board space; the AD7715 uses a smaller 16-lead package. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range indicates suitability for industrial environments; both parts share the same industrial-grade range. |
| ADC architecture | Sigma-delta (charge-balancing) | Sigma-delta | Sigma-delta architecture provides high resolution and low noise for low-frequency signals; both parts use this topology. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7710ANZ | AD7715AN-3 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 24 | 16 |
| Sampling Rate(Per Second) | 1k | 500 |
| Number of Inputs | 2 | 1 |
| Input Type | Differential | Differential |
| Data Interface | SPI | SPI, DSP |
| Configuration | MUX-PGA-ADC | 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 primary functional differences between the AD7710ANZ and the AD7715AN-3?
The AD7710ANZ is a 24-bit sigma-delta ADC with two differential input channels, an on-chip programmable gain amplifier (PGA), and a bidirectional serial interface, housed in a 24-lead PDIP. The AD7715AN-3 is a single-channel 16-bit sigma-delta ADC with an on-chip PGA, operating from a 3 V supply, in a 16-lead PDIP. The AD7710ANZ offers higher resolution and dual input channels, while the AD7715AN-3 provides lower resolution and a single channel in a smaller package with lower supply voltage operation.
Are the AD7710ANZ and AD7715AN-3 pin-compatible?
No. The AD7710ANZ is packaged in a 24-lead PDIP, while the AD7715AN-3 is packaged in a 16-lead PDIP. The different pin counts and pin functions prevent direct pin-to-pin substitution without PCB redesign.
What are the resolution and channel count specifications for each device?
The AD7710ANZ provides 24-bit resolution with two differential input channels. The AD7715AN-3 provides 16-bit resolution with a single differential input channel. These specifications are stated in the respective Analog Devices datasheets.
How do the supply voltage requirements of the AD7710ANZ and AD7715AN-3 differ?
The AD7710ANZ operates from a 5 V supply (with separate AVDD and DVDD options per datasheet). The AD7715AN-3 is specified for 3 V supply operation (the "-3" suffix denotes the 3 V version). Designs migrating between the two must account for these supply differences.
Can the AD7715AN-3 be used as a drop-in replacement for the AD7710ANZ in an existing design?
No. Differences in package size (16-lead vs 24-lead PDIP), resolution (16-bit vs 24-bit), channel count (single vs dual), and supply voltage (3 V vs 5 V) mean the AD7715AN-3 cannot be a drop-in replacement. A redesign and revalidation against the Analog Devices datasheets are required.
Do both devices include an on-chip programmable gain amplifier (PGA)?
Yes. Both the AD7710ANZ and the AD7715AN-3 integrate an on-chip PGA, as specified in their respective Analog Devices datasheets. The available gain settings and ranges should be confirmed from each datasheet before design use.
What serial interface do the AD7710ANZ and AD7715AN-3 provide?
Both devices provide a bidirectional serial interface for communication with a microcontroller or DSP, per their Analog Devices datasheets. The exact interface configuration and timing should be verified from the respective datasheet before implementation.