My Inquiry
My Account
Analog Devices Inc. AD7873ARUZ-REEL
- Part No.:
- AD7873ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Touch Screen Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7873ARUZ-REEL.pdf
- Description:
- IC SCREEN CNTRL 12BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,304
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7873ARUZ-REEL from Analog Devices is a 12-bit successive approximation ADC with integrated 4-wire touch screen interface, on-chip 2.5 V reference, temperature sensor (−40°C to +85°C), and direct battery measurement (0 V to 6 V). It delivers 125 kSPS throughput at 3.6 V supply, supports ratiometric conversion, and operates from a single 2.2 V to 5.25 V supply in TSSOP-16 package.
For engineers reviewing the AD7873ARUZ-REEL datasheet, AD7873ARUZ-REEL pinout, AD7873ARUZ-REEL application, or AD7873ARUZ-REEL equivalent, key selection criteria include touch pressure measurement capability, programmable 8-/12-bit resolution, shutdown current ≤1 µA, auxiliary analog input, and compatibility with resistive touch panels in portable industrial and consumer HMI systems.
Technical Context
The AD7873ARUZ-REEL integrates low-on-resistance switches (X+/Y+ ≈5 Ω, X−/Y− ≈6 Ω) for driving 4-wire touch screens and uses differential reference architecture to cancel switch resistance errors. Its internal 2.5 V reference (±15 ppm/°C tempco) supports auxiliary, battery, and temperature measurements - all selectable via 6-to-1 analog multiplexer.
Conversion is controlled by synchronous serial interface (DCLK, DIN, DOUT, CS, BUSY) with MSB-first output and 12 DCLK-cycle conversion time. The device enters track mode on the fifth DCLK falling edge and acquires signals within 3 DCLK cycles when source impedance ≤100 Ω, enabling precise position sampling in fast-response touch interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with no missing codes; enables sub-millimeter touch coordinate accuracy in 4-wire panels. |
| Throughput Rate | 125 kSPS maximum; supports real-time multi-point gesture sampling at >100 Hz frame rates. |
| Supply Range | 2.2 V to 5.25 V single supply; compatible with Li-ion battery rails (3.0–4.2 V) and 3.3 V/5 V system logic. |
| Reference | On-chip 2.5 V ±15 ppm/°C reference; eliminates external reference component and reduces BOM cost. |
| Touch Pressure | Integrated Z-axis (X+/X−, Y+/Y−) measurement; provides analog force feedback without external circuitry. |
| Shutdown Current | ≤1 µA max; extends battery life in handheld devices during display-off or idle states. |
| Battery Monitor | 0 V to 6 V input range with ±2.5% accuracy; enables direct cell voltage monitoring across single/dual-cell configurations. |
Pinout & Package
AD7873ARUZ-REEL is housed in a 16-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch and exposed pad (EPAD) recommended for grounding. Pin 1 is marked with dot; EPAD must be soldered to PCB ground plane for thermal and reliability performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VCC (Pins 1, 10) | Power supply input | Both pins must be connected directly together; supplies core logic, ADC, and switch drivers from 2.2–5.25 V. |
| X+, Y+, X−, Y− (Pins 2–5) | Touch panel interface terminals | Drive and sense 4-wire resistive touch screen; low RON (5–6 Ω) minimizes coordinate error. |
| GND (Pin 6) | Analog ground reference | Single-point return for all analog inputs, reference, and internal temperature sensor; must tie to clean AGND plane. |
| VBAT (Pin 7) | Battery monitor input | High-impedance (10 kΩ) input for 0–6 V direct battery measurement; sampled internally with same ADC core. |
| AUX (Pin 8) | Auxiliary analog input | Additional 12-bit channel for system-level sensing (e.g., ambient light, thermistor); shares reference and conversion path. |
| VREF (Pin 9) | Reference I/O | Outputs internal 2.5 V reference or accepts external 1–VCC reference; requires 0.1 µF decoupling to GND. |
| PENIRQ (Pin 11) | Open-drain pen interrupt | Active-low CMOS output signaling touch event; requires 10–100 kΩ pull-up to +VCC for proper logic level. |
| DOUT (Pin 12) | Serial data output | MSB-first 12-bit result plus trailing zeros; high-impedance when CS is high for bus sharing. |
| BUSY (Pin 13) | Conversion status indicator | Active-high during conversion; allows host MCU to poll instead of fixed delay timing. |
| DIN (Pin 14) | Serial control input | Loads 8-bit control register on rising DCLK edges; configures channel selection, resolution, and power modes. |
| CS (Pin 15) | Chip select | Active-low enable for serial interface and conversion initiation; must remain low for full transaction. |
| DCLK (Pin 16) | Serial clock input | Drives both interface timing and internal ADC sampling clock; 10 kHz–2 MHz operation supported. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric conversion mode | Eliminates position error caused by on-resistance drift in touch screen switches using differential reference architecture. |
| Integrated temperature sensor | Measures die temperature from −40°C to +85°C with ±2°C accuracy using differential diode method; no calibration required. |
| Direct battery monitoring | Supports 0–6 V input with ±2.5% accuracy using internal ADC path; avoids need for external resistor divider scaling. |
| Programmable resolution | Selects 8-bit (fast response) or 12-bit (high precision) conversion via control register; optimizes speed vs. accuracy trade-off per use case. |
| Low-power shutdown | Reduces quiescent current to ≤1 µA while preserving register state; enables rapid wake-up (<10 µs) for touch event detection. |
Applications
| Personal Digital Assistants | Smart Hand-Held Devices |
|---|---|
Use Scenario: Compact PDA with 3.5-inch resistive touchscreen used for handwritten note capture and navigation. IC Role / Device Role / Timing Role: AD7873ARUZ-REEL digitizes X/Y coordinates, measures stylus pressure (Z-axis), and monitors battery health during active use. Use Value: Single-chip integration replaces discrete op-amp, reference, and ADC solutions, reducing PCB area by >40% and eliminating calibration overhead. | Use Scenario: Ruggedized handheld terminal for warehouse inventory scanning with glove-friendly touch interface. IC Role / Device Role / Timing Role: AD7873ARUZ-REEL samples touch events at 125 kSPS, detects intentional presses via pressure thresholding, and logs battery voltage for predictive maintenance. Use Value: On-chip 2.5 V reference and ratiometric mode ensure consistent coordinate accuracy across varying battery voltage (3.0–4.2 V) and temperature (−20°C to +70°C). |
| Point-of-Sale Terminals | Touch Screen Monitors |
Use Scenario: Counter-mounted retail POS system with 7-inch resistive overlay supporting signature capture and menu navigation. IC Role / Device Role / Timing Role: AD7873ARUZ-REEL handles dual-role touch digitization (position + pressure) and monitors 12 V supply-derived 5 V rail via VBAT input. Use Value: Integrated battery monitor and temperature sensor provide real-time system health telemetry without adding external sensors or ADC channels. | Use Scenario: Industrial control panel with 10-inch resistive touchscreen operating in factory environments with EMI and wide temperature swings. IC Role / Device Role / Timing Role: AD7873ARUZ-REEL performs synchronized X/Y/Z sampling with <12 µs conversion time and rejects supply ripple via 70 dB PSRR at 100 kHz. Use Value: Differential reference architecture and on-chip switches eliminate external buffer amplifiers, reducing noise susceptibility and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touch screen digitizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7843IPWR | 12-bit SAR ADC with identical 4-wire interface, but no on-chip temperature sensor or battery monitor; requires external 2.5 V reference. | Lacks integrated diagnostics; suitable only where temperature/battery monitoring is handled externally. | Choose ADS7843IPWR if BOM cost is prioritized over feature integration and system-level sensing is unnecessary. |
| TSC2007IPWPR | 12-bit ADC with integrated charge pump for touch screen biasing, but no battery monitor; uses I²C interface instead of SPI-compatible serial. | Requires different host driver stack and lacks direct VBAT input; optimized for low-noise touch-only systems. | Choose TSC2007IPWPR when touch sensitivity in noisy environments is critical and I²C infrastructure already exists. |
Compared with ADS7843IPWR and TSC2007IPWPR, the AD7873ARUZ-REEL uniquely combines touch digitization, battery voltage monitoring, and die temperature sensing in one SPI-compatible device - reducing component count, simplifying layout, and enabling richer HMI telemetry without sacrificing 125 kSPS throughput or 12-bit precision.
Availability
AD7873ARUZ-REEL is available at Aetrix Electronics and suitable for personal digital assistants, smart hand-held devices, point-of-sale terminals, and industrial touch screen monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7873ARUZ-REEL 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 AD7873ARUZ-REEL belongs to Analog Devices' precision touch screen controller product line, designed specifically for battery-powered and industrial human-machine interface applications requiring integrated analog sensing, low power, and robust 4-wire resistive touch support.
FAQ
What is the primary function of the AD7873ARUZ-REEL in a touch screen system?
The AD7873ARUZ-REEL serves as a dedicated 4-wire resistive touch screen digitizer IC that converts analog X, Y, and Z (pressure) coordinates into 12-bit digital values. It integrates all necessary functions - including on-chip switches, reference, temperature sensor, battery monitor, and SPI-compatible serial interface - eliminating the need for external components in compact HMI designs. Its ratiometric architecture ensures coordinate accuracy independent of switch resistance variation.
Does the AD7873ARUZ-REEL require an external reference voltage?
No, the AD7873ARUZ-REEL includes an internal 2.5 V reference with ±15 ppm/°C tempco, usable for all measurement modes (touch, temperature, battery, AUX). An external reference (1 V to VCC) may be applied via the VREF pin if higher precision or custom scaling is needed, but it is not required. When unused, the internal reference can be disabled to reduce power consumption by ~1.04 mW at 3.6 V.
How does the AD7873ARUZ-REEL support battery-powered operation?
The AD7873ARUZ-REEL supports battery-powered operation through multiple low-power features: single 2.2–5.25 V supply compatibility, shutdown mode consuming ≤1 µA, and programmable 8-/12-bit resolution. At 125 kSPS with internal reference enabled, it draws only 670 µA typical at 3.6 V (2.41 mW), and drops to 150 µA in static normal mode. Its direct 0–6 V battery monitor input eliminates external scaling resistors, preserving accuracy across discharge curves.
Can the AD7873ARUZ-REEL measure temperature, and how accurate is it?
Yes, the AD7873ARUZ-REEL includes an on-die temperature sensor covering −40°C to +85°C. It offers ±2°C accuracy using the differential method (TEMP0/TEMP1 diodes) with no calibration required. Resolution is 1.6°C typical in differential mode and 0.3°C in single-conversion mode. The sensor shares the same ADC core and reference as other channels, ensuring consistent metrology without added BOM cost or layout complexity.
What package type is used for the AD7873ARUZ-REEL, and what are its mounting requirements?
The AD7873ARUZ-REEL is supplied in a 16-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch and exposed thermal pad (EPAD). The EPAD is not electrically connected internally but must be soldered to the PCB ground plane for optimal thermal dissipation and mechanical reliability. Standard reflow profiles for Pb-free parts apply (peak 250°C, 20–40 sec), and a 0.1 µF ceramic capacitor is required between VREF and GND.
AD7873ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Touchscreen:
- 4 Wire Resistive
- Resolution (Bits):
- 12 b
- Interface:
- Serial
- Voltage Reference:
- External, Internal
- Voltage - Supply:
- 2.2V ~ 5.25V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
AD7873ARUZ-REEL FAQ
1.How can I place an order for AD7873ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7873ARUZ-REEL 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 AD7873ARUZ-REEL reliable?
The price and inventory of AD7873ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7873ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7873ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7873ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7873ARUZ-REEL?
AD7873ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7873ARUZ-REEL 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 AD7873ARUZ-REEL?
For technical support, including AD7873ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7873ARUZ-REEL requirements.
6.How does Aetrix verify that AD7873ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7873ARUZ-REEL 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 AD7873ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7873ARUZ-REEL?
All AD7873ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7873ARUZ-REEL, 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 AD7873ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD7873ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7873ARUZ-REEL Tags
-
TSC2046IPWR
Texas Instruments
-
TSC2007IPWR
Texas Instruments
-
TSC2046EIPWR
Texas Instruments
-
AR1021-I/SS
Microchip Technology
-
AR1020-I/SS
Microchip Technology
-
AR1100-I/MQ
Microchip Technology
-
AR1021T-I/ML
Microchip Technology
-
AR1100T-I/SS
Microchip Technology
-
TSC2003IPWR
Texas Instruments
-
TSC2004IRTJR
Texas Instruments
-
AR1100BRD
Microchip Technology
.jpg)
-
TSC2046IRGVR
Texas Instruments
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…
