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Texas Instruments ADC700JH
- Part No.:
- ADC700JH
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-CDIP (0.600", 15.24mm)
- Datasheet:
-
ADC700JH.pdf
- Description:
- SAR ADC, 16-BIT, SERIAL/PARALLEL
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
ADC700JH from Burr-Brown Corporation is a 16-bit successive approximation analog-to-digital converter with integrated voltage reference, current-controlled clock, and TTL-compatible parallel/serial digital interface. It supports ±2.5V, ±5V, ±10V, 0V–+5V, 0V–+10V, and 0V–+20V analog input ranges, achieves ±0.006% FSR linearity error, and delivers 17µs max conversion time across 0°C to +70°C. It is used in precision industrial data acquisition systems requiring stable, high-resolution digitization of sensor or transducer outputs.
For engineers reviewing the ADC700JH datasheet, ADC700JH pinout, ADC700JH application, or ADC700JH equivalent, this page provides verified technical context, exact pin functions, real-world interface timing constraints, confirmed bipolar/unipolar coding modes (BOB/BTC/USB), and validated alternatives for military-grade 16-bit A/D conversion in embedded instrumentation.
Technical Context
The ADC700JH implements a fully self-contained successive approximation architecture with on-chip buried-zener reference laser-trimmed for <±10 ppm/°C zero drift and <±8 ppm/°C gain drift over its 0°C to +70°C specification range. Its internal current-controlled oscillator ensures stable 17µs conversion time without external clock dependency.
It features dual-output capability: parallel 8-bit byte-access via HBEN-controlled 3-state drivers (DB0–DB15), and synchronous serial output (16-bit NRZ) with dedicated Serial Data Strobe (pin 14). The Data Ready flag (pin 12) and Status (Busy) flag (pin 13) enable interrupt-driven microprocessor interfacing while permitting read-back of prior conversion data during active conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - resolves analog inputs into 65,536 discrete digital codes with no missing codes to 14 bits over temperature. |
| Conversion Time | 17 µs max - fixed latency enabling deterministic sampling at up to ~58.8 kSPS in burst mode. |
| Linearity Error | ±0.006% FSR - corresponds to ±3.9 LSB at 16-bit for ±10V range, ensuring high-fidelity signal reconstruction. |
| Analog Input Ranges | ±2.5V, ±5V, ±10V, 0V–+5V, 0V–+10V, 0V–+20V - selectable via external pin connections, not software. |
| Digital Interface | TTL-compatible parallel (two 8-bit bytes) + serial NRZ - supports both bus-constrained and isolated (optocoupler) system architectures. |
| Reference & Clock | Integrated buried-zener reference + internal current-controlled oscillator - eliminates need for external precision reference or clock source. |
| Supply Voltages | +VCC = ±11.4V to ±16V, VDD = +4.75V to +5.25V - requires dual ±12V/±15V analog and +5V digital rails. |
Pinout & Package
ADC700JH is packaged in a hermetic 28-pin side-braze ceramic DIP (Package Drawing #237), rated for 0°C to +70°C operation and suitable for high-reliability industrial and military applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Comparator Input | High-impedance node for external offset adjustment; must be bypassed or grounded if unused. |
| 4 | Gain Adjust | Analog input for external gain trim potentiometer; requires 0.01µF bypass to Analog Common. |
| 7 | WR | Active-low start-of-conversion strobe; initiates SAR cycle when CS is asserted. |
| 9 | CS | Chip Select enables all control logic; device is inactive unless CS is low. |
| 10 | HBEN | High-Byte Enable selects DB8–DB15 (MSB) vs DB0–DB7 (LSB) on parallel bus. |
| 11 | Serial Data | NRZ-coded 16-bit serial output; synchronized to Serial Data Strobe (pin 14). |
| 12 | Data Ready | Active-high flag indicating valid latched conversion result; clears only on MSB read. |
| 13 | Status | Active-high Busy signal; asserts ~110ns after WR, deasserts at conversion completion. |
| 14 | Serial Data Strobe | 16 negative-going edges per conversion; clocks serial bit stream, not SAR clock. |
| 23 | BTCEN | Bipolar Two's Complement Enable - selects BTC coding for bipolar inputs when high. |
| 26–28 | Analog Input Range Select | Pins 26 (0V–+5V), 27 (±5V/0V–+10V), 28 (±10V/0V–+20V) - hardwired per Table I, not programmable. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip voltage reference | Laser-trimmed buried-zener with ±5 ppm/°C zero drift - eliminates external reference calibration and thermal drift compensation. |
| Output data latch | Separate latch between SAR and 3-state drivers - enables overlapped conversion/read cycles for deterministic interrupt handling. |
| Selectable output coding | Hardware-selectable USB (unipolar), BOB or BTC (bipolar) via BTCEN pin - matches native microprocessor arithmetic without firmware translation. |
| Parallel + serial dual interface | Simultaneous 8-bit byte-access and isolated serial output - supports both direct MPU bus connection and optocoupled galvanic isolation. |
| Externally trimmable gain/zero | Zero error adjustable to ±0.05% FSR (unipolar) or ±0.1% FSR (bipolar); gain error to ±0.1% FSR - enables system-level calibration post-PCB assembly. |
Applications
| Industrial Process Monitoring | Aerospace Sensor Conditioning |
|---|---|
Use Scenario: Digitizing 4–20 mA current loop outputs from pressure, temperature, and flow transmitters in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary A/D converter providing 16-bit resolution and ±0.006% linearity for closed-loop feedback accuracy within 0.1% full-scale tolerance. Use Value: Enables detection of sub-0.01% process deviations using factory-calibrated analog inputs without external reference or clock components. | Use Scenario: Converting outputs from inertial measurement units (IMUs) and accelerometers in flight control avionics with MIL-STD-810 environmental compliance. IC Role / Device Role / Timing Role: High-stability A/D front-end operating across –25°C to +85°C (via AH variant) or –55°C to +125°C (RH), synchronized to deterministic 17µs conversion window. Use Value: Delivers repeatable 14-bit no-missing-codes performance under thermal shock and vibration, critical for attitude estimation algorithms. |
| Test & Measurement Equipment | Medical Diagnostic Instrumentation |
Use Scenario: High-accuracy waveform digitization in benchtop oscilloscopes and automated test equipment requiring calibrated DC accuracy and low noise floor. IC Role / Device Role / Timing Role: Precision digitizer with 305 µV LSB (±10V range) and <±1 LSB differential nonlinearity - supports traceable NIST calibration workflows. Use Value: Eliminates need for external trimming resistors or reference buffers, reducing BOM count and board area in portable instruments. | Use Scenario: Digitizing ECG, EEG, and bio-potential signals in patient monitoring systems where baseline stability and low-frequency fidelity are essential. IC Role / Device Role / Timing Role: Bipolar-input A/D converter configured for ±2.5V range with BTC coding, supporting signed arithmetic for real-time filtering and feature extraction. Use Value: Integrated reference and gain/offset trim allow single-point calibration at production, meeting IEC 60601-2-27 DC accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit successive approximation A/D converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8505IPFB | 16-bit, 250kSPS, SPI interface only, external reference required, ±10V input supported | No parallel interface; requires external reference and clock; higher speed but lower DC accuracy (±0.012% INL) | Choose ADS8505IPFB for higher throughput in new designs where SPI simplifies routing and external reference is already present. |
| AD7656ASTZ | 16-bit, 250kSPS, parallel/serial interface, internal reference, ±10V input, 6-channel simultaneous sampling | Multi-channel architecture; higher power (120mW); larger 64-lead LQFP package; no military temp grade | Choose AD7656ASTZ when multi-channel synchronized sampling is required and commercial temp range suffices. |
Compared with ADC700JH, ADS8505IPFB offers higher speed but sacrifices DC precision and interface flexibility, while AD7656ASTZ provides channel density and modern packaging at the cost of military-grade temperature support and hermetic reliability.
Availability
ADC700JH is available at Aetrix Electronics and suitable for industrial process monitoring, aerospace sensor conditioning, test & measurement equipment, medical diagnostic instrumentation, and precision instrumentation requiring stable component supply across extended lifecycle programs.
Supply support for ADC700JH 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
Burr-Brown Corporation was a U.S.-based analog semiconductor pioneer, acquired by Texas Instruments in 2000, known for high-precision data converters, amplifiers, and interface ICs.
The ADC700 product line was designed for high-accuracy, standalone 16-bit data acquisition in harsh environments - emphasizing hermetic packaging, laser-trimmed references, and dual parallel/serial interfaces for legacy and upgrade-sensitive systems.
FAQ
What analog input ranges does the ADC700JH support, and how are they selected?
The ADC700JH supports ±2.5V, ±5V, ±10V, 0V to +5V, 0V to +10V, and 0V to +20V analog input ranges. Selection is accomplished by hardwiring pins 26, 27, and 28 per Table I in the datasheet - for example, connecting the signal to pin 28 and leaving pin 27 open configures the ±10V range. No software or register programming is involved; configuration is strictly external and static.
Does the ADC700JH require an external clock source?
No, the ADC700JH does not require an external clock source. It contains a fully integrated current-controlled oscillator that sequences the successive approximation logic internally. The only externally accessible timing signal is the Serial Data Strobe (pin 14), which is derived from the internal clock and intended solely for synchronizing serial data capture - it cannot be used to drive or override the conversion engine.
How does the Data Ready flag (pin 12) behave during consecutive conversions?
The Data Ready flag on the ADC700JH remains high until the most significant byte (MSB) is read via HBEN and RD. If only the least significant byte (LSB) is read, or if no byte is read before the next conversion completes, the new result overwrites the latch and Data Ready stays asserted. This behavior allows continuous conversion back-to-back while preserving the ability to read prior results - a key feature for interrupt-driven microprocessor interfaces.
Can the ADC700JH operate with a single +5V supply?
No, the ADC700JH cannot operate with a single +5V supply. It requires three independent supplies: VDD = +4.75V to +5.25V (digital logic), +VCC = +11.4V to +16V (positive analog), and –VCC = –11.4V to –16V (negative analog). These dual ±12V/±15V analog rails are mandatory to support its bipolar input ranges and internal reference circuitry - attempting operation with only +5V will prevent functionality and may damage the device.
What is the purpose of the BTCEN pin on the ADC700JH?
The BTCEN (Binary Two's Complement Enable) pin on the ADC700JH selects the output coding format for bipolar input signals. When BTCEN = high, the ADC700JH outputs data in Two's Complement format (BTC), which aligns directly with signed integer arithmetic in microprocessors. When BTCEN = low, it outputs in Bipolar Offset Binary (BOB). This hardware-selectable coding eliminates the need for firmware sign-extension or code translation in real-time control loops.
ADC700JH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-CDIP (0.600", 15.24mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel, Serial
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- ±11.4V ~ 16V
- Voltage - Supply, Digital:
- ±11.4V ~ 16V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ADC700JH FAQ
1.How can I place an order for ADC700JH through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC700JH 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 ADC700JH reliable?
The price and inventory of ADC700JH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC700JH is usually 5 days.
3.What payment methods are accepted for ADC700JH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC700JH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC700JH?
ADC700JH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC700JH 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 ADC700JH?
For technical support, including ADC700JH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC700JH requirements.
6.How does Aetrix verify that ADC700JH is sourced from the original manufacturer or authorized distributors?
All ADC700JH 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 ADC700JH meets industry standards.
7.What is the process for return or replacement of ADC700JH?
All ADC700JH units undergo pre-shipment inspection (PSI). If there is an issue with ADC700JH, 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 ADC700JH part is unused and in its original packaging.
Return procedure for ADC700JH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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