My Inquiry
My Account
Texas Instruments ADS7862YB/2K
- Part No.:
- ADS7862YB/2K
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS7862YB/2K.pdf
- Description:
- IC ADC 12BIT SAR 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,530
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7862YB/2K from Texas Instruments is a dual 12-bit, 500kHz simultaneous-sampling SAR analog-to-digital converter with four fully differential input channels (A0/A1/B0/B1), 2µs per-channel throughput, guaranteed no missing codes, and parallel interface - designed for high-precision motor control and multi-axis positioning systems.
For engineers reviewing the ADS7862YB/2K datasheet, ADS7862YB/2K pinout, ADS7862YB/2K application, or ADS7862YB/2K equivalent, key selection considerations include simultaneous sampling capability across two independent channel pairs, ±0.5 LSB integral linearity error, 80dB CMRR at 50kHz, internal 2.5V reference with ±25ppm/°C drift, and TQFP-32 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The ADS7862YB/2K implements two independent successive approximation register (SAR) ADC cores, each paired with a dedicated differential sample-and-hold amplifier, enabling true simultaneous acquisition on Channel A (A0/A1) and Channel B (B0/B1). Its architecture maintains full differential signal paths from input terminals through the S/H stage to the SAR core, delivering 80dB common-mode rejection at 50kHz.
Control is managed via asynchronous CONVST-triggered conversion start, BUSY status flag, and parallel read using CS/RD/A0 signals - eliminating software overhead. The device accepts an external CMOS clock (up to 8MHz) where fSAMPLE = fCLOCK/16, supporting deterministic timing for real-time closed-loop systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 1.22 mV with 2.5V reference, sufficient for 12-bit position feedback in servo drives. |
| Sampling Rate | 500 kHz per channel - enables 2 µs total throughput per channel, supporting 100 kHz control loop bandwidths with margin. |
| Integral Linearity Error | ±0.5 LSB max - ensures monotonicity and <0.012% FSR gain error, critical for accurate current/voltage reconstruction in 3-phase power control. |
| Common-Mode Rejection | 80 dB at 50 kHz - suppresses noise coupling in noisy motor drive environments without external filtering. |
| Power Dissipation | 40 mW at 5 V - enables dense integration in thermally constrained industrial I/O modules without forced cooling. |
| Reference Voltage | Internal 2.5 V ±0.5%, ±25 ppm/°C drift - eliminates need for external precision reference in cost-sensitive designs. |
| Input Configuration | Fully differential, bipolar (±2.5 V span) - supports direct connection to isolated current-sense amplifiers or resolver interfaces. |
Pinout & Package
TQFP-32 package (PBS designator), 7 mm × 7 mm, 0.5 mm pitch, lead-free, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH A0+/CH A0– | Differential Input Pair A0 | Simultaneously sampled with CH B0+ / CH B0–; selected when A0 = LOW during CONVST. |
| CH A1+/CH A1– | Differential Input Pair A1 | Simultaneously sampled with CH B1+ / CH B1–; selected when A0 = HIGH during CONVST. |
| REFIN / REFOUT | Reference Input/Output | Internal 2.5 V reference buffered to REFIN; direct short required between pins for internal reference use. |
| CONVST | Conversion Start Trigger | Asynchronous active-low edge initiates simultaneous hold and conversion on both channel pairs. |
| BUSY | Conversion Status Flag | Active-high open-drain output indicates ongoing conversion; used for hardware handshaking. |
| RD / CS / A0 | Parallel Read Control | RD toggles between A/B register outputs; CS enables bus; A0 selects channel pair (0 or 1) during read. |
| DB0–DB11 | Parallel Data Bus | 12-bit binary two's complement output; MSB (DB11) to LSB (DB0); tri-stated unless CS & RD both LOW. |
| +VA / +VD / AGND / DGND | Power & Ground | +VA/+VD = 4.75–5.25 V; separate analog/digital grounds must be connected at single point near device. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | Two independent SAR cores acquire A0/A1 and B0/B1 pairs at identical instants - preserves phase coherence for vector-controlled motor drives. |
| No Missing Codes | Guaranteed over full temperature range - eliminates data gaps in closed-loop feedback, preventing instability in PID regulators. |
| Internal Reference | 2.5 V ±0.5% with ±25 ppm/°C drift and 50 µVPP noise - reduces BOM count and layout complexity vs. external reference ICs. |
| High CMRR | 80 dB at 50 kHz - rejects EMI from IGBT switching in VFDs without additional front-end filtering components. |
| Low Aperture Jitter | 50 ps typical - limits SNR degradation to <0.1 dB at 100 kHz input, enabling accurate harmonic analysis in power quality meters. |
Applications
| Motor Phase Current Sensing | Multi-Axis Servo Position Feedback |
|---|---|
Use Scenario: Real-time measurement of three-phase motor currents using shunt resistors and isolated amplifiers feeding differential inputs. IC Role / Device Role / Timing Role: Dual simultaneous sampling ADC captures IA and IB at exact same instant to reconstruct IC via Kirchhoff's law; 2 µs throughput enables 500 kHz current loop update. Use Value: Eliminates phase skew between current samples, ensuring accurate field-oriented control (FOC) torque calculation and reducing torque ripple by >15% vs. sequential sampling. |
Use Scenario: High-speed acquisition of encoder/resolver outputs across X/Y/Z axes in CNC machine tools or robotic arms. IC Role / Device Role / Timing Role: ADS7862YB/2K samples A/B quadrature pairs from two encoders simultaneously, preserving relative timing for coordinated motion control. Use Value: Enables sub-microsecond inter-axis synchronization, improving contouring accuracy by 0.02% in multi-axis interpolation paths. |
| 3-Phase Inverter Voltage Monitoring | Industrial Power Quality Analyzer |
Use Scenario: Direct sensing of DC-link and phase-leg voltages in servo inverters using resistive dividers and differential amplifiers. IC Role / Device Role / Timing Role: Simultaneous capture of VDC and VU (or VV) enables instantaneous voltage vector calculation for space-vector PWM generation. Use Value: Reduces voltage estimation latency to <2.5 µs, allowing dynamic DC-link compensation and improving inverter efficiency by up to 1.2% at partial load. |
Use Scenario: High-fidelity acquisition of voltage/current waveforms for harmonic distortion (THD), flicker, and sag/swell detection per IEC 61000-4-30. IC Role / Device Role / Timing Role: ADS7862YB/2K digitizes synchronized voltage and current channels at 500 kSPS with 71 dB SINAD, meeting Class A accuracy requirements. Use Value: Supports 40 MHz small-signal bandwidth and 75 dB THD - enables accurate 50th harmonic analysis (2.5 kHz) with <0.5% amplitude error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8327IPWR | Single 16-bit SAR, 500 kSPS, serial SPI interface, no simultaneous sampling - requires external multiplexer for dual-channel sync. | Lacks native dual-pair simultaneous sampling; unsuitable for phase-critical motor control where A/B channel timing alignment is mandatory. | Select only if resolution >12-bit is required and system can tolerate added latency from external mux sequencing. |
| AD7656ASTZ | 6-channel 16-bit simultaneous-sampling SAR, 250 kSPS, parallel interface, ±0.5 LSB INL - higher channel count but lower speed and larger LQFP-64 package. | Supports 6 channels but slower (250 kHz vs. 500 kHz); better for multi-sensor monitoring, not high-bandwidth current loops. | Choose when expanding beyond 4 channels is needed and 250 kHz sample rate meets control loop requirements. |
Compared with ADS8327IPWR and AD7656ASTZ, the ADS7862YB/2K uniquely balances 500 kHz dual-pair simultaneous sampling, 12-bit precision, low power (40 mW), and compact TQFP-32 packaging - making it optimal for space-constrained, phase-coherent industrial motion control where timing integrity outweighs ultra-high resolution.
Availability
ADS7862YB/2K is available at Aetrix Electronics and suitable for motor control, multi-axis positioning systems, and 3-phase power control requiring stable component supply across extended industrial temperature ranges and long production lifecycles.
Supply support for ADS7862YB/2K 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters for industrial and automotive markets.
The ADS7862YB/2K belongs to TI's high-speed precision SAR ADC product line, engineered specifically for real-time industrial control applications demanding simultaneous sampling, low latency, and robust noise immunity in electrically hostile environments.
FAQ
What is the maximum sampling rate supported by the ADS7862YB/2K?
The ADS7862YB/2K supports a maximum sampling rate of 500 kHz per channel. This is achieved using an 8 MHz external clock (fSAMPLE = fCLOCK/16). Each conversion completes in 1.75 µs with 0.25 µs acquisition time, enabling true simultaneous sampling across all four differential inputs without inter-channel skew. The ADS7862YB/2K maintains this rate across its full operating temperature range (–40°C to +85°C).
Does the ADS7862YB/2K require an external reference voltage?
No, the ADS7862YB/2K includes an internal 2.5 V reference with ±0.5% initial accuracy and ±25 ppm/°C temperature drift. For standard operation, REFIN (pin 1) and REFOUT (pin 2) must be shorted externally. An external reference (1.2 V to 2.6 V) may be used via REFIN for customized full-scale ranges, but the ADS7862YB/2K is fully functional and specified with the internal reference enabled.
How does the ADS7862YB/2K achieve simultaneous sampling across four channels?
The ADS7862YB/2K integrates two independent SAR ADC cores and two matched differential sample-and-hold amplifiers. When CONVST is asserted, both S/H amplifiers freeze their respective input pairs (A0/A1 and B0/B1) at the exact same instant. Conversion proceeds in parallel, preserving phase relationships critical for vector control. This architecture - not time-interleaved or multiplexed - ensures true simultaneity, confirmed by <100 ps aperture delay matching between channels.
What is the meaning of the "/2K" suffix in ADS7862YB/2K?
The "/2K" suffix in ADS7862YB/2K denotes the tape-and-reel packaging quantity: 2,500 units per reel. It is an ordering variant of the ADS7862YB grade (±0.5 LSB INL, ±0.1% gain error), sharing identical electrical specifications, TQFP-32 package (PBS), and –40°C to +85°C temperature rating with ADS7862YB/250 (250-unit reel) and ADS7862YB (bulk).
Can the ADS7862YB/2K interface directly with a microcontroller without level-shifting?
Yes, the ADS7862YB/2K features CMOS-compatible digital I/O (VIH ≥ 3.0 V, VIL ≤ 0.8 V at 5 V supply) and operates from a single +5 V supply (+VA = +VD = 4.75–5.25 V). Its parallel DB0–DB11 outputs, RD, CS, and A0 signals are fully compatible with 5 V microcontrollers (e.g., TI C2000 F2837x) without level shifters. Grounding AGND and DGND at a single point is mandatory for noise control.
ADS7862YB/2K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address, Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-TQFP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7862YB/2K FAQ
1.How can I place an order for ADS7862YB/2K through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7862YB/2K 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 ADS7862YB/2K reliable?
The price and inventory of ADS7862YB/2K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7862YB/2K is usually 5 days.
3.What payment methods are accepted for ADS7862YB/2K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7862YB/2K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7862YB/2K?
ADS7862YB/2K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7862YB/2K 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 ADS7862YB/2K?
For technical support, including ADS7862YB/2K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7862YB/2K requirements.
6.How does Aetrix verify that ADS7862YB/2K is sourced from the original manufacturer or authorized distributors?
All ADS7862YB/2K 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 ADS7862YB/2K meets industry standards.
7.What is the process for return or replacement of ADS7862YB/2K?
All ADS7862YB/2K units undergo pre-shipment inspection (PSI). If there is an issue with ADS7862YB/2K, 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 ADS7862YB/2K part is unused and in its original packaging.
Return procedure for ADS7862YB/2K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7862YB/2K 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…
