My Inquiry
My Account
Analog Devices Inc. AD7912AUJZ-REEL7
- Part No.:
- AD7912AUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
AD7912AUJZ-REEL7.pdf
- Description:
- IC ADC 10BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,662
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7912AUJZ-REEL7 from Analog Devices is a 10-bit, dual-channel successive approximation ADC operating from 2.35 V to 5.25 V supply, delivering 1 MSPS throughput with 71 dB minimum SNR at 100 kHz input and ±0.5 LSB integral nonlinearity. It features SPI/QSPI/MICROWIRE/DSP-compatible serial interface, daisy-chain capability, and no pipeline delay-used in portable medical instruments and battery-powered data acquisition systems.
For engineers reviewing the AD7912AUJZ-REEL7 datasheet, AD7912AUJZ-REEL7 pinout, AD7912AUJZ-REEL7 application, or AD7912AUJZ-REEL7 equivalent, key selection considerations include its 2-channel single-ended architecture, 8-lead TSOT package, 1 µA max standby current, channel-to-channel isolation of 90 dB typ, and compatibility with microprocessor-controlled sampling via CS/SCLK/DIN/DOUT signals.
Technical Context
The AD7912AUJZ-REEL7 implements a track-and-hold amplifier with 290 ns acquisition time and 8.5 MHz full-power bandwidth, enabling accurate digitization of signals up to 100 kHz with 61 dB min SINAD. Its conversion is initiated on the falling edge of CS, with result serialization controlled by SCLK (up to 18 MHz), supporting 14-cycle readout for 10-bit data including channel and mode identifiers.
It operates in Normal, Power-Down, and Daisy-Chain modes; power-down reduces current to 1 µA max (50 nA typ), while daisy-chain mode allows cascaded readout of multiple AD7912/AD7922 devices without additional control lines. The internal VDD-referenced architecture eliminates need for external reference and supports 0 V to VDD analog input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for medium-precision sensor or control loop digitization |
| Throughput Rate | 1 MSPS - enables real-time sampling of audio-band and fast transient signals in portable instrumentation |
| SNR @ 100 kHz | 71 dB min - ensures ≥11.8 effective bits for clean signal capture in noisy battery-powered environments |
| INL / DNL | ±0.5 LSB max - guarantees monotonicity and no missing codes across full temperature range (−40°C to +85°C) |
| Supply Range | 2.35 V to 5.25 V - supports direct interfacing with Li-ion, 3.3 V, and 5 V logic domains without level-shifting |
| Standby Current | 1 µA max - extends battery life in intermittent-sampling applications such as wearable health monitors |
| Channel Isolation | 90 dB typ - prevents crosstalk between VIN0 and VIN1 in dual-sensor monitoring (e.g., ECG + respiration) |
Pinout & Package
AD7912AUJZ-REEL7 is housed in an 8-lead TSOT (Thin Small Outline Transistor) package, 3 mm × 1.7 mm × 0.8 mm, with wettable flanks for automated optical inspection. Pin numbering follows standard TSOT top-view orientation (pin 1 at top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN (Pin 1) | Serial data input | Selects active channel (VIN0/VIN1) and operation mode on falling SCLK edges; requires setup/hold timing per t8/t9 |
| SCLK (Pin 2) | Serial clock input | Controls conversion timing and data transfer rate; 18 MHz max frequency defines 777 ns conversion time |
| CS (Pin 3) | Chip select input | Active-low signal that initiates sampling on falling edge and frames serial data transmission |
| DOUT (Pin 4) | Serial data output | Outputs 14-bit stream: two leading zeros + channel ID + mode bit + 10-bit MSB-first result + two trailing zeros |
| VIN1 (Pin 5) | Analog input channel 1 | Single-ended input referenced to GND; accepts 0 V to VDD range; 20 pF input capacitance affects anti-alias filter design |
| VIN0 (Pin 6) | Analog input channel 0 | Primary analog input; identical specs to VIN1; channel-to-channel isolation ≥90 dB minimizes mutual interference |
| GND (Pin 7) | Analog ground | Reference node for all analog circuitry; must be star-connected to minimize noise coupling into T/H amplifier |
| VDD (Pin 8) | Power supply | Single 2.35–5.25 V rail powers analog core, digital interface, and internal reference; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture provides deterministic, one-shot conversion with precise sampling instant control via CS |
| Daisy-chain mode | Enables multi-ADC synchronization and compact PCB layout by chaining DOUT→DIN between devices without extra control lines |
| Flexible power management | Full power-down mode draws ≤1 µA, reducing average power in burst-mode acquisition (e.g., sensor wake-up every 100 ms) |
| VDD-referenced conversion | Eliminates external reference component and associated cost/area; dynamic range scales automatically with supply voltage |
| SPI/QSPI/MICROWIRE compatibility | Interoperates with common microcontroller peripherals without protocol translation or glue logic |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Simultaneous acquisition of ECG and body temperature in handheld diagnostic device powered by single-cell Li-ion battery. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes analog front-end outputs with synchronized sampling; CS-triggered acquisition ensures phase coherence between channels. Use Value: 90 dB channel isolation prevents ECG signal corruption from thermal sensor switching noise; 1 µA standby current extends runtime beyond 72 hours per charge. | Use Scenario: Field-deployable environmental monitor logging temperature, humidity, and light intensity at 1 kSPS using ultra-low-power MCU. IC Role / Device Role / Timing Role: ADC interfaces directly to MCU SPI peripheral; daisy-chain mode supports future expansion to 4-channel sensing without firmware changes. Use Value: 2.35 V minimum supply allows operation down to end-of-life battery voltage; 71 dB SNR preserves resolution for 12-bit-equivalent post-processing gain calibration. |
| Optical Sensor Interface | Industrial Control Loop Sampling |
Use Scenario: Digitizing photodiode and ambient light sensor outputs in smart lighting system with adaptive dimming algorithm. IC Role / Device Role / Timing Role: ADC samples both sensors at 1 MSPS to capture rapid lux transients; VDD-referenced scaling adapts to varying LED driver supply rails. Use Value: 8.5 MHz full-power bandwidth captures fast optical pulses; 20 pF input capacitance simplifies RC anti-alias filter design with low-value resistors. | Use Scenario: Closed-loop motor current and position feedback in battery-operated robotic actuator requiring <1 µs timing jitter. IC Role / Device Role / Timing Role: ADC provides time-deterministic sampling triggered by PWM sync signal; no pipeline delay ensures immediate response to fault conditions. Use Value: Aperture jitter of 30 ps limits timing uncertainty to <0.003% of 1 MSPS period; ±0.5 LSB INL maintains closed-loop stability across −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7922AUJZ-REEL7 | 12-bit resolution, 70 dB min SINAD, 888 ns conversion time, same pinout and interface | Higher precision for vibration analysis or high-fidelity audio monitoring where >10-bit ENOB required | Select AD7922AUJZ-REEL7 when system SNR budget demands ≥70 dB and 12-bit code granularity is critical |
| ADS7822U | 12-bit, 200 kSPS max, 3 V only supply, 8-pin SOIC package, SPI-only interface | Lower throughput and fixed supply limit suitability to low-speed industrial sensors with legacy PCB footprints | Choose ADS7822U only if existing design uses SOIC-8 and 200 kSPS suffices; not drop-in due to speed and voltage mismatch |
Compared with AD7922AUJZ-REEL7, the AD7912AUJZ-REEL7 trades 2-bit resolution for lower power and faster conversion latency; versus ADS7822U, it offers higher speed, wider supply range, and TSOT packaging for space-constrained designs-but requires updated layout and firmware timing handling.
Availability
AD7912AUJZ-REEL7 is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data acquisition, optical sensor interface, and industrial control loop sampling requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7912AUJZ-REEL7 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, with design and manufacturing expertise spanning over 50 years.
The AD7912/AD7922 product line was engineered for ultra-low-power, high-throughput data acquisition in space- and energy-constrained systems-emphasizing integration, supply flexibility, and robust serial interfacing for portable and distributed sensing applications.
FAQ
What is the maximum sampling rate supported by the AD7912AUJZ-REEL7?
The AD7912AUJZ-REEL7 supports a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.35 V to 5.25 V, fSCLK = 18 MHz). This is achieved with a 14-cycle serial readout sequence, resulting in a 777 ns conversion time. At lower SCLK frequencies, throughput scales linearly-for example, 5 MHz SCLK yields ~315 kSPS-while maintaining full DC accuracy and dynamic performance.
Does the AD7912AUJZ-REEL7 require an external voltage reference?
No, the AD7912AUJZ-REEL7 uses an internal reference derived from VDD, eliminating the need for an external reference component. This allows the full-scale input range to scale from 0 V to VDD, simplifying BOM and layout. The reference is trimmed at production to ensure ±0.5 LSB total unadjusted error across temperature, and no external reference pins are present on the 8-lead TSOT package.
How does the daisy-chain mode function on the AD7912AUJZ-REEL7?
In daisy-chain mode, multiple AD7912AUJZ-REEL7 devices share a common SCLK and CS bus, with DOUT of one device connected to DIN of the next. A single CS pulse initiates simultaneous conversions across all devices, and serial results are shifted out sequentially on successive SCLK cycles. The mode bit in each device's output stream identifies whether it is the first, middle, or last in the chain-enabling synchronized multi-channel acquisition without additional control lines.
What is the channel-to-channel isolation specification for the AD7912AUJZ-REEL7?
The AD7912AUJZ-REEL7 provides 90 dB typical channel-to-channel isolation, measured by applying a full-scale 20–500 kHz sine wave to the unselected input while digitizing a 10 kHz signal on the selected channel. This high isolation ensures minimal crosstalk in dual-sensor applications such as simultaneous ECG and SpO₂ monitoring, where signal integrity between physiological channels is critical for clinical accuracy.
Can the AD7912AUJZ-REEL7 operate from a 2.5 V supply?
Yes, the AD7912AUJZ-REEL7 is fully specified for operation from 2.35 V to 5.25 V, including 2.5 V. At 2.5 V, typical IDD in normal operational mode is 2 mA max at 1 MSPS, yielding ~5 mW power dissipation. Logic thresholds adapt automatically (VINH ≥ 0.7 × VDD), and dynamic performance-including 71 dB SNR at 100 kHz-is maintained across the entire supply range per the A-grade specifications.
AD7912AUJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7912AUJZ-REEL7 FAQ
1.How can I place an order for AD7912AUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7912AUJZ-REEL7 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 AD7912AUJZ-REEL7 reliable?
The price and inventory of AD7912AUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7912AUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7912AUJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7912AUJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7912AUJZ-REEL7?
AD7912AUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7912AUJZ-REEL7 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 AD7912AUJZ-REEL7?
For technical support, including AD7912AUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7912AUJZ-REEL7 requirements.
6.How does Aetrix verify that AD7912AUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7912AUJZ-REEL7 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 AD7912AUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7912AUJZ-REEL7?
All AD7912AUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7912AUJZ-REEL7, 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 AD7912AUJZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7912AUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7912AUJZ-REEL7 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…
