Texas Instruments ADS807E/1KG4

Overview

ADS807E/1KG4 from Texas Instruments is a 12-bit, 53-MHz pipelined analog-to-digital converter (ADC) with differential track-and-hold, internal/external reference selection, and 3-state digital outputs. It delivers 82 dB spurious-free dynamic range at 10 MHz input, 69 dB SNR at 3 V_p-p, and operates in SSOP-28 package with 335 mW power dissipation. It serves as the front-end digitizer in high-speed IF sampling and medical imaging systems.

For engineers reviewing the ADS807E/1KG4 datasheet, ADS807E/1KG4 pinout, ADS807E/1KG4 application, or ADS807E/1KG4 equivalent, this page provides verified technical context, real-world interface constraints, confirmed timing behavior (6-cycle latency), validated differential/single-ended input configurations, and precise reference voltage mapping for 2 V_p-p/3 V_p-p full-scale ranges.

Technical Context

The ADS807E/1KG4 employs a 12-stage pipelined architecture with on-chip digital error correction logic to guarantee no missing codes and ±0.5 LSB DNL across temperature. Its differential track-and-hold accepts inputs up to 270 MHz bandwidth and supports both differential and single-ended modes via common-mode biasing at CM pin.

Timing is strictly edge-triggered on CLK rising edge; output data becomes valid after exactly 6 clock cycles. The converter includes dedicated pins for over-range indication (OTR), output enable (OE), and full-scale range selection (FSSEL), enabling seamless integration into multichannel gain-control and multiplexed data acquisition systems.

Key Specifications

Pinout & Package

ADS807E/1KG4 is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, θ_JA = 50°C/W. Pin 1 is GND; pins 15 and 27 are +VS (5 V analog supply); pin 28 is V_DRV (3 V or 5 V logic driver supply).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, 12-bit ADC applications.

Compared with ADS807E/1KG4, ADS802E trades resolution and SFDR for lower cost and identical layout reuse, while AD9220AR offers lower power at the expense of speed, feature set, and package compatibility - neither is pin-compatible, and both require PCB redesign for migration.

Availability

ADS807E/1KG4 is available at Aetrix Electronics and suitable for communications base stations, medical ultrasound systems, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for ADS807E/1KG4 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, embedded processing, and high-performance data converters for industrial, automotive, and communications markets.

The ADS807E/1KG4 belongs to TI's high-speed precision ADC product line, designed specifically for demanding IF sampling, medical imaging, and test instrumentation applications requiring >12-bit linearity at >40 MSPS.

FAQ

What is the maximum sampling rate supported by the ADS807E/1KG4?

The ADS807E/1KG4 supports a maximum sampling rate of 53 million samples per second (MSPS), as specified in its electrical characteristics table under "Conversion Characteristics." This rate is achievable across the full –40°C to +85°C operating temperature range with proper power supply decoupling and clock signal integrity. At 53 MSPS, the device maintains 82 dB SFDR at 10 MHz input frequency and 67.5 dB SNR with 2 V_p-p differential input.

Does the ADS807E/1KG4 support both internal and external reference modes?

Yes, the ADS807E/1KG4 supports both internal and external reference modes via the INT/EXT pin (Pin 18). When INT/EXT is pulled LOW, the internal bandgap reference is enabled, providing REFT = +3.0 V and REFB = +2.0 V for 2 V_p-p full-scale range. When INT/EXT is floating or HIGH, external references are applied to Pins 21 (REFB) and 22 (REFT), and internal reference buffers are disabled to prevent loading.

How does the FSSEL pin affect the input range of the ADS807E/1KG4?

The FSSEL pin (Pin 16) selects the full-scale input range: LOW configures a 2 V_p-p differential range (REFT = +3.0 V, REFB = +2.0 V), while HIGH configures a 3 V_p-p range (REFT = +3.25 V, REFB = +1.75 V). An internal 50 kΩ pull-down resistor ensures default 2 V_p-p operation if FSSEL is left unconnected - no external pull-down is required unless 3 V_p-p mode is needed.

What is the purpose of the OTR (Over-Range) pin on the ADS807E/1KG4?

The OTR pin (Pin 17) is an open-drain output that asserts HIGH when the analog input exceeds the selected full-scale range (±FS). It is used in real-time gain-control loops - for example, in receiver front ends - to trigger automatic attenuation before ADC saturation occurs. The flag remains asserted until the next conversion cycle, enabling synchronous response in FPGA- or DSP-based AGC systems.

Can the ADS807E/1KG4 operate with single-ended analog inputs?

Yes, the ADS807E/1KG4 supports single-ended operation: one input (IN or IN) receives the signal while the other is biased to the common-mode voltage (CM pin output or external +2.5 V). However, single-ended use reduces SFDR by ~20 dB (e.g., 62 dBFS at 10 MHz) versus differential mode due to degraded harmonic rejection. The device's differential topology is recommended for all performance-critical applications.