Part A
AD5544BRSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7094 Stückzahl
- Package
- SSOP-28
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5544BRSZ and AD5544ARS are functionally equivalent quad 16-bit current-output DACs sharing identical resolution, channel count, and serial interface architecture. The AD5544BRSZ offers a higher specified INL accuracy grade and a wider guaranteed operating temperature range, making it the more robust choice for precision and industrial applications. The AD5544ARS remains a valid drop-in alternative where the tighter linearity specification and extended temperature coverage are not mandatory. Both devices are available in the same SSOP-28 package and are pin-compatible, allowing direct substitution on existing PCB layouts without redesign.
Resolution and Channel Count
High match
Package and Pin Configuration
High match
INL Accuracy Grade
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD5544ARS
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3544 Stückzahl
- Package
- SSOP-28
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5544BRSZ | AD5544ARS | Why it matters |
|---|---|---|---|
| Resolution | 16 bits | 16 bits | Determines the smallest output step and overall precision of the DAC; identical resolution means equivalent quantization granularity. |
| Number of DAC Channels | 4 | 4 | Defines how many independent analog outputs are available; matching channel count supports direct functional substitution. |
| DAC Architecture | Current-steering R-2R | Current-steering R-2R | Architecture affects settling behavior, glitch performance, and output drive characteristics; identical architecture preserves dynamic performance. |
| Interface Type | SPI / Serial | SPI / Serial | Determines how the host controller communicates with the DAC; matching interface ensures firmware and pin connections remain compatible. |
| Supply Voltage (Analog) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the allowable analog supply range; identical ranges allow the same power rail design to be reused. |
| Supply Voltage (Digital) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Sets the logic-level compatibility for the digital interface; matching values ensure the same controller I/O levels can be used. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | Determines the environments in which the device can reliably operate; the wider range of the ARS version supports more demanding thermal conditions. |
| Package / Grade | 20-Lead SSOP (RS-20) | 20-Lead SSOP (RS-20) | Package and grade suffix indicate mechanical footprint and qualification level; the B-grade offers tighter specifications than the A-grade. |
| INL (Integral Nonlinearity) | ±1 LSB max | ±2 LSB max | INL quantifies deviation from an ideal transfer function; the tighter B-grade specification yields higher absolute accuracy. |
| DNL (Differential Nonlinearity) | ±1 LSB max | ±1 LSB max | DNL indicates monotonicity and step-size uniformity; both grades guarantee 16-bit monotonic behavior. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5544BRSZ | AD5544ARS |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 4 | 4 |
| Settling Time | 900ns (Typ) | 900ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | No | No |
| Data Interface | SPI | SPI |
| 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 |
| INL / DNL(LSB) | ±1 (Max), ±1 (Max) | ±2 (Max), ±1.5 (Max) |
| Architecture | R-2R | R-2R |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the primary difference between the AD5544BRSZ and the AD5544ARS?
The AD5544BRSZ and AD5544ARS are both quad, 16-bit, current-output digital-to-analog converters (DACs) from Analog Devices. The primary difference is their specified linearity grade and operating temperature range. The AD5544BRSZ offers 16-bit monotonicity and is specified over the industrial temperature range of -40°C to +85°C. The AD5544ARS is specified over the same temperature range but has a lower maximum integral nonlinearity (INL) and differential nonlinearity (DNL) grade, typically 1 LSB max for the B-grade versus 2 LSB max for the A-grade, depending on the exact datasheet revision.
Are the AD5544BRSZ and AD5544ARS pin-compatible and package-compatible?
Yes. Both devices are offered in the same 28-lead SSOP (Shrink Small Outline Package) and have identical pinouts. The package designator "RSZ" indicates a 28-lead SSOP with a lead-free, RoHS-compliant finish. Therefore, they are drop-in replacements for each other from a mechanical and pin-function perspective.
Can the AD5544ARS be used as a direct substitute for the AD5544BRSZ in an existing design?
In most cases, yes, provided the application can tolerate the looser linearity specifications of the A-grade. The AD5544ARS has a higher maximum INL and DNL error. If the system design margin accounts for this reduced accuracy, the AD5544ARS can be substituted. However, for precision applications requiring guaranteed 16-bit monotonicity and the tightest linearity, the AD5544BRSZ is the appropriate choice. Always verify the specific datasheet limits for the exact grade being used.
Do both the AD5544BRSZ and AD5544ARS require the same external reference and supply voltages?
Yes. Both devices operate from a single +2.7 V to +5.5 V supply for the digital and analog sections, or from dual ±2.7 V to ±5.5 V supplies for the analog section, depending on the configuration. They both require an external reference voltage (VREF) to set the full-scale output current. The reference input range and the resulting output current equation are identical for both grades.
What is the interface compatibility of the AD5544BRSZ and AD5544ARS?
Both devices feature a high-speed, 3-wire SPI-compatible serial interface that operates at clock rates up to 50 MHz. They also include a hardware LDAC pin for simultaneous updating of all DAC registers and a CLR pin for asynchronous clearing to zero-scale or midscale. The digital interface timing and logic thresholds are identical for both the B and A grades.
Are the AD5544BRSZ and AD5544ARS RoHS compliant and lead-free?
Yes. The "Z" suffix in both part numbers indicates that the devices are RoHS-compliant and use a lead-free, matte tin termination finish. This is consistent with Analog Devices' standard lead-free packaging designation for the 28-lead SSOP package.
Which grade should be selected for a new design requiring 16-bit monotonicity over temperature?
For a new design that must guarantee 16-bit monotonicity over the full industrial temperature range, the AD5544BRSZ is the correct choice. The B-grade is explicitly specified for 16-bit monotonicity, whereas the A-grade is specified for 16-bit resolution but with wider linearity error limits. The designer must review the monotonicity specification in the datasheet for the A-grade to determine if it meets the system requirements.
Do the AD5544BRSZ and AD5544ARS differ in power consumption or settling time?
No. The AD5544BRSZ and AD5544ARS share the same core DAC architecture and therefore have identical typical power consumption and dynamic performance specifications. Both feature a typical settling time of 0.5 µs to ±1 LSB and a typical power dissipation of 10 µW at 5 V. The grade difference affects only the DC linearity specifications, not the speed or power characteristics.