My Inquiry
My Account
Analog Devices Inc. AD7898AR-10
- Part No.:
- AD7898AR-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7898AR-10.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7898AR-10 from Analog Devices is a 12-bit successive-approximation analog-to-digital converter (ADC) with ±10 V bipolar input range, 220 kSPS throughput, single 5 V supply operation, and on-chip track/hold amplifier - designed for precision data acquisition in industrial sensor interfaces and instrumentation systems.
For engineers reviewing the AD7898AR-10 datasheet, AD7898AR-10 pinout, AD7898AR-10 application, or AD7898AR-10 equivalent, this page delivers verified specifications, SOIC-8 package layout, Mode 0/Mode 1 serial interface timing constraints, SNR of 71 dB at 30 kHz, and confirmed alternatives for ±10 V input signal conditioning.
Technical Context
The AD7898AR-10 implements a laser-trimmed internal oscillator for Mode 0 conversion control and supports external SCLK-synchronized conversion in Mode 1 with power-down capability. Its R-2R ladder DAC-based SAR architecture accepts buffered 2.5 V reference input and delivers two's complement 12-bit output with four leading zeros over SDATA.
Input scaling uses a resistive ladder (R1 = 30 kΩ, R2 = 7.5 kΩ, R3 = 10 kΩ) to achieve ±10 V full-scale range while maintaining 24 kΩ minimum input resistance. Aperture jitter is 75 ps typ, full-power bandwidth is 3.6 MHz @ 3 dB, and track/hold acquisition time is 520 ns typ for AD7898AR-10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes; LSB = 4.88 mV for ±10 V range. |
| Throughput Rate | 220 kSPS max - achievable in both Mode 0 (internal clock) and Mode 1 (external SCLK up to 3.7 MHz). |
| Input Range | ±10 V - supported by dedicated AD7898-10 variant with 24 kΩ min input resistance. |
| Signal-to-Noise+Distortion | 71 dB min at fIN = 30 kHz - enables >11.5 ENOB for medium-bandwidth ac signals. |
| Power Dissipation | 22.5 mW max - achieved at 5 V supply; drops to 25 µW in Mode 1 power-down state. |
| Reference Input | 2.5 V ± 5% - externally supplied, buffered on-chip; requires 0.1 µF decoupling capacitor. |
| Operating Temperature | –40°C to +85°C - specified across full range for industrial-grade reliability. |
Pinout & Package
AD7898AR-10 is housed in an 8-lead SOIC package (R-8), with gull-wing leads, 1.27 mm pitch, and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Accepts 2.375 V to 2.625 V buffered reference; determines full-scale accuracy and LSB size. |
| 2 - VIN | Analog input channel | ±10 V bipolar input with high-impedance resistive ladder front-end; no dynamic charging current. |
| 3 - GND | Analog ground reference | Common return for track/hold, comparator, DAC, and digital logic; must connect to clean analog plane. |
| 4 - SCLK | Serial clock input | Controls data readout timing; serves as conversion clock in Mode 1; max 15 MHz in Mode 0. |
| 5 - SDATA | Serial data output | 16-bit frame (4 zeros + 12-bit two's complement result); three-stated after final bit. |
| 6 - VDRIVE | Logic I/O supply | Sets interface voltage level (2.7 V to 5.25 V); enables direct connection to 3 V or 5 V processors. |
| 7 - CS / CONVST | Chip select / convert start | Falling-edge triggered: initiates conversion (Mode 0) or frames serial transfer (Mode 1). |
| 8 - VDD | Analog/digital power supply | 4.75 V to 5.25 V single supply; powers ADC core, track/hold, and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible dual-mode serial interface | Mode 0 (3-wire, internal clock) and Mode 1 (3-wire, SCLK-synchronized with power-down) both support 220 kSPS. |
| VDRIVE logic-level independence | Serial I/O operates at 2.7–5.25 V independent of VDD, enabling seamless interfacing with 3 V microcontrollers. |
| On-chip track/hold amplifier | Acquisition time 520 ns typ; full-power bandwidth 3.6 MHz @ 3 dB - supports subsampling of band-limited signals. |
| Bipolar ±10 V input scaling | Resistive ladder network (30 kΩ/7.5 kΩ/10 kΩ) provides precise gain/offset matching without external op-amps. |
| Low-noise dynamic performance | 71 dB SINAD, –78 dB THD, –89 dB peak spurious at 30 kHz - suitable for precision instrumentation and sensor digitization. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Continuous digitization of ±10 V outputs from strain gauges, RTDs, and industrial transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC with integrated track/hold; handles multiplexed sensor inputs at ≤220 kSPS with minimal external components. Use Value: Eliminates need for external signal conditioning amplifiers and reference buffers due to high-Z ±10 V input and on-chip 2.5 V reference buffer. |
Use Scenario: High-fidelity waveform capture in portable oscilloscopes and automated test equipment requiring 12-bit resolution and low THD. IC Role / Device Role / Timing Role: Front-end ADC with 3.6 MHz full-power bandwidth; synchronized to system clock via Mode 1 SCLK for deterministic sampling. Use Value: Delivers 71 dB SINAD at 30 kHz and <75 ps aperture jitter - meets mid-tier bench instrument accuracy requirements without calibration overhead. |
| Energy Metering Interfaces | Motor Control Feedback Systems |
|
Use Scenario: Isolated voltage/current sensing in smart meter designs where ±10 V ADC input matches transformer-coupled secondary outputs. IC Role / Device Role / Timing Role: Isolation-side ADC interfaced to 3 V MCU via VDRIVE; operates in Mode 0 for deterministic conversion latency. Use Value: Single-supply 5 V operation and 22.5 mW power dissipation enable compact, thermally constrained meter PCB layouts. |
Use Scenario: Digitizing analog feedback signals (e.g., motor phase currents, DC bus voltage) in servo drives with real-time control loop timing constraints. IC Role / Device Role / Timing Role: High-speed ADC with 3.3 µs conversion time (Mode 0) and quiet time of 0.1 µs - fits within tight PWM cycle windows. Use Value: On-chip track/hold eliminates external sample-and-hold, reducing BOM count and board area in space-constrained drive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, ±10 V input ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892AR-10 | 12-bit, 200 kSPS, ±10 V input, but lacks on-chip track/hold and requires external sample-and-hold circuit. | Higher system complexity and board area; unsuitable for direct replacement in track/hold-dependent designs. | Select AD7898AR-10 when integrated track/hold, lower power (22.5 mW vs. 30 mW), or guaranteed no-missing-codes performance is required. |
| ADS7816U | 12-bit, 200 kSPS, ±10 V input, SPI-compatible, but only specified for 0°C to +70°C commercial temperature range. | Not qualified for industrial –40°C to +85°C operation; lacks VDRIVE pin for mixed-voltage interfacing. | Choose AD7898AR-10 for extended temperature reliability, 3 V/5 V logic compatibility, and validated 71 dB SINAD across full temp range. |
Compared with AD7892AR-10 and ADS7816U, AD7898AR-10 uniquely integrates track/hold, supports industrial temperature range, and enables direct 3 V processor interfacing via VDRIVE - reducing system component count and thermal design margin requirements.
Availability
AD7898AR-10 is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, and energy metering applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7898AR-10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7898 product line delivers compact, single-supply 12-bit ADCs with integrated track/hold and flexible serial interfaces - engineered specifically for space-constrained, low-power industrial data acquisition systems.
FAQ
What is the maximum sampling rate supported by the AD7898AR-10?
The AD7898AR-10 achieves a maximum throughput rate of 220 kSPS in both Mode 0 (internal clock) and Mode 1 (external SCLK). In Mode 1, this requires an SCLK frequency of up to 3.7 MHz; in Mode 0, SCLK may run up to 15 MHz for optimal timing margin. The AD7898AR-10 maintains full dc and ac specifications - including ±1 LSB relative accuracy and 71 dB SINAD - at this rate.
Does the AD7898AR-10 require an external reference voltage?
Yes, the AD7898AR-10 requires an external 2.5 V ± 5% reference applied to the REF IN pin. The device includes an on-chip buffer for this input, and a 0.1 µF decoupling capacitor is mandatory per the datasheet. The AD7898AR-10 does not contain an internal reference; using an inaccurate or noisy reference directly degrades full-scale accuracy and SNR performance of the AD7898AR-10.
Can the AD7898AR-10 interface directly with a 3 V microcontroller?
Yes, the AD7898AR-10 supports direct 3 V logic interfacing via its dedicated VDRIVE pin. When VDRIVE is tied to 3 V, all digital inputs (CS/CONVST, SCLK) accept 3 V–compatible thresholds, and SDATA outputs valid logic levels compatible with 3 V receivers - without level shifters. This feature is fully characterized and guaranteed across temperature for the AD7898AR-10.
What is the input impedance of the AD7898AR-10 analog input?
The AD7898AR-10 specifies a minimum input resistance of 24 kΩ for its ±10 V input range. This value results from its internal resistive ladder network (R1 = 30 kΩ, R2 = 7.5 kΩ, R3 = 10 kΩ) followed by a high-impedance track/hold amplifier input stage. Unlike switched-capacitor ADCs, the AD7898AR-10 presents a purely resistive, benign input with no dynamic charge injection - simplifying driver amplifier selection.
How does the AD7898AR-10 handle power-down functionality?
Power-down is available only in Mode 1 operation of the AD7898AR-10 and is activated by holding CS high while keeping SCLK inactive. In this state, IDD drops to 20 µA max across temperature, reducing power dissipation to 25 µW typical at 5 V. Recovery time from power-down is 4.33 µs max, after which normal conversion can resume - making the AD7898AR-10 suitable for battery-powered or duty-cycled data loggers.
AD7898AR-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 220k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7898AR-10 FAQ
1.How can I place an order for AD7898AR-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7898AR-10 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7898AR-10 reliable?
The price and inventory of AD7898AR-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7898AR-10 is usually 5 days.
3.What payment methods are accepted for AD7898AR-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7898AR-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7898AR-10?
AD7898AR-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7898AR-10 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7898AR-10?
For technical support, including AD7898AR-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7898AR-10 requirements.
6.How does Aetrix verify that AD7898AR-10 is sourced from the original manufacturer or authorized distributors?
All AD7898AR-10 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7898AR-10 meets industry standards.
7.What is the process for return or replacement of AD7898AR-10?
All AD7898AR-10 units undergo pre-shipment inspection (PSI). If there is an issue with AD7898AR-10, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7898AR-10 part is unused and in its original packaging.
Return procedure for AD7898AR-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7898AR-10 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
