Part A
AD7710ANZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3222 PCS
- Package
- DIP-24
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The AD7710ANZ and AD7715AN-5 are both 24-bit sigma-delta ADCs from Analog Devices, but they are not functionally interchangeable. The AD7710ANZ provides dual differential input channels with a programmable gain front end and a bidirectional serial interface, while the AD7715AN-5 offers a single differential input channel with a fixed gain of 32 and a read-only serial output. Their package pinouts, channel count, gain architecture, and interface behavior differ, so a direct board-level swap is not possible without redesign.
Different channel count
Different gain architecture
Different interface type
Different pinout
Parts at a glance
Part B
AD7715AN-5
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9138 PCS
- Package
- DIP-16
- Series
- Data Acquisition - Analog to Digital Converters (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-5 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 16 | Higher resolution allows detection of smaller signal changes; a 24-bit ADC provides finer measurement granularity than a 16-bit device. |
| Number of input channels | 2 (differential) | 1 (differential) | Channel count determines how many independent signal sources can be measured without external multiplexing. |
| PGA gain range | 1 to 128 | 1 to 128 | Programmable gain allows small-amplitude signals to be amplified before conversion, improving effective resolution for low-level inputs. |
| Output data rate (max) | 1.028 kSPS | 500 SPS | Maximum throughput affects how fast the system can sample and respond to changing input signals. |
| Supply voltage | 5 V (analog and digital) | 5 V (analog and digital) | Supply voltage compatibility determines whether the part can drop into an existing power rail design without level shifting. |
| Interface type | Serial (bidirectional, SPI-compatible) | Serial (SPI/QSPI/MICROWIRE compatible) | Interface compatibility affects whether the device can communicate with the host microcontroller without protocol changes. |
| Package | 24-lead PDIP | 16-lead PDIP | Package footprint and pin count affect PCB layout and whether a direct board replacement is possible. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for industrial and harsh-environment applications. |
| Internal reference | Yes (2.5 V) | Yes (1.225 V) | An internal reference simplifies design and affects the full-scale input range and absolute accuracy of the conversion. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7710ANZ | AD7715AN-5 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,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 | 5V |
| 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 AD7715AN-5?
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. The AD7715AN-5 is a 16-bit sigma-delta ADC with a single differential input channel, an on-chip PGA, and a unidirectional serial interface. The AD7710ANZ offers higher resolution and dual input channels, while the AD7715AN-5 provides 16-bit resolution in a simpler single-channel configuration.
Are the AD7710ANZ and AD7715AN-5 pin-compatible?
No. The AD7710ANZ is supplied in a 24-lead PDIP (N-24-1) package, while the AD7715AN-5 is supplied in a 16-lead PDIP (N-16-1) package. The differing package sizes and pin counts mean the two devices are not pin-compatible and cannot be interchanged on the same PCB footprint without redesign.
How do the resolution and output data rates compare between the AD7710ANZ and AD7715AN-5?
The AD7710ANZ provides 24-bit no-missing-code resolution with programmable output update rates from 9.76 Hz to 1.028 kHz. The AD7715AN-5 provides 16-bit no-missing-code resolution with output update rates of 50 Hz, 60 Hz, 250 Hz, and 500 Hz (selectable via the gain and update rate settings). The AD7710ANZ delivers higher resolution and a wider range of programmable data rates.
What are the supply voltage requirements for each device?
The AD7710ANZ operates from a single +5 V supply (AVDD and DVDD) with an optional ±5 V dual supply for the analog front end, and includes an on-chip reference. The AD7715AN-5 operates from a single +5 V supply (the "-5" suffix denotes the 5 V version) and requires an external reference voltage. Designers must account for the AD7715AN-5's external reference requirement when comparing the two.
Do both devices include an on-chip programmable gain amplifier (PGA)?
Yes. Both the AD7710ANZ and AD7715AN-5 integrate an on-chip PGA. The AD7710ANZ supports gain settings of 1 to 128, while the AD7715AN-5 supports gain settings of 1, 2, 32, and 128. The available gain ranges differ, so signal-chain gain planning must be verified against each device's datasheet.
How do the serial interfaces of the AD7710ANZ and AD7715AN-5 differ?
The AD7710ANZ features a bidirectional serial interface that supports both read and write operations, allowing configuration registers to be programmed and conversion data to be read over the same interface. The AD7715AN-5 features a unidirectional (read-only) serial interface for outputting conversion results, with configuration set via dedicated pins. This difference affects microcontroller firmware and interface wiring.
Can the AD7715AN-5 be used as a drop-in replacement for the AD7710ANZ in an existing design?
No. The devices differ in package size and pin count (24-lead vs 16-lead PDIP), resolution (24-bit vs 16-bit), number of input channels (two vs one), serial interface type (bidirectional vs unidirectional), and reference architecture (on-chip vs external). A drop-in replacement is not possible; any substitution requires a full design review against the respective datasheets.