Part A
AD7997BRUZ-0
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3591 PCS
- Package
- TSSOP-20
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7997BRUZ-0 and AD7993BRU-0 are both 8-channel, 10-bit successive-approximation ADCs from the same Analog Devices family, sharing an I²C-compatible serial interface and a comparable TSSOP-16 footprint. The AD7997BRUZ-0 offers a faster conversion rate and a wider supply range, while the AD7993BRU-0 provides a lower-power option with a narrower supply window. Both are functionally interchangeable in many multiplexed-sensor acquisition designs, but the supply voltage range and conversion timing should be validated against the target system before substitution.
Resolution and Channel Count
High match
Package Type
High match
Supply Voltage Range
Validation required
Conversion Rate
Validation required
Parts at a glance
Part B
AD7993BRU-0
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3214 PCS
- Package
- TSSOP-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 | AD7997BRUZ-0 | AD7993BRU-0 | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 4 | Determines how many analog signals can be sampled; an 8-channel part cannot directly replace a 4-channel part if more inputs are needed, and vice versa affects board layout. |
| Resolution | 10 bits | 10 bits | Both provide 10-bit resolution, so measurement granularity (1024 codes) is equivalent, supporting functional substitutability in accuracy terms. |
| Package / Pin Count | 20-lead TSSOP | 16-lead TSSOP | Different footprint and pin count mean the parts are not drop-in compatible; PCB layout must be redesigned to swap between them. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical supply range allows operation from the same rails, simplifying power supply design when substituting. |
| Interface | I2C (2-wire) | I2C (2-wire) | Same serial interface protocol enables reuse of the same host firmware and bus wiring. |
| Throughput / Conversion Rate | 188 kSPS | 188 kSPS | Equal sampling speed means timing-critical applications can use either part without performance loss. |
| Input Type | Single-ended | Single-ended | Matching input configuration ensures the same sensor/signal conditioning circuitry can be reused. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings confirm both parts suit the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7997BRUZ-0 | AD7993BRU-0 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | 10 |
| Sampling Rate(Per Second) | 188k | 188k |
| Number of Inputs | 8 | 4 |
| Input Type | Single Ended | Single Ended |
| Data Interface | I²C | I²C |
| Configuration | MUX-S/H-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7997BRUZ-0 and AD7993BRU-0?
The AD7997BRUZ-0 is an 8-channel, 10-bit successive approximation ADC with an I2C-compatible interface, housed in a 20-lead TSSOP (RU-20) package. The AD7993BRU-0 is a 4-channel, 10-bit ADC of the same family, housed in a 16-lead TSSOP (RU-16) package. The primary differences are channel count (8 vs 4) and package pin count (20 vs 16).
Do the AD7997BRUZ-0 and AD7993BRU-0 have the same resolution and interface?
Yes. Both devices are 10-bit successive approximation ADCs with an I2C-compatible serial interface supporting standard, fast, and high-speed modes, and both operate from a single 2.7 V to 5.5 V supply.
Are the AD7997BRUZ-0 and AD7993BRU-0 pin-to-pin compatible?
No. The AD7997BRUZ-0 uses a 20-lead TSSOP and the AD7993BRU-0 uses a 16-lead TSSOP, so they are not drop-in replacements. The AD7993BRU-0 provides four analog inputs, while the AD7997BRUZ-0 provides eight, requiring different PCB layouts.
Can the AD7993BRU-0 be used as a substitute for the AD7997BRUZ-0 in an existing design?
Not directly. Substitution requires verifying channel count requirements, package footprint, and pin function differences against the respective manufacturer datasheets. A design needing eight input channels cannot use the 4-channel AD7993BRU-0 without additional multiplexing.
What is the difference in the "0" suffix between AD7997BRUZ-0 and AD7993BRU-0?
The "-0" suffix denotes the device grade/ordering variant within the AD799x family. Both parts share the same 10-bit ADC core and I2C interface; the suffix distinguishes ordering options such as temperature range and packaging configuration as defined in the manufacturer's ordering guide.
Do both parts support the same supply voltage range and temperature range?
Both the AD7997BRUZ-0 and AD7993BRU-0 operate from a single 2.7 V to 5.5 V supply and are specified over the industrial temperature range of −40 °C to +85 °C, per the manufacturer datasheets.